Publish quixos-protocol from 1de28b236de076d239752b77553f833dfbdb5b43

Replace opaque props with checked generic presentation contracts and lazy typed
interface references. Generate readonly/writable field APIs and component checks.

Preserve CRDT editing through explicit resolved getter/setter contracts, binding-
fenced delta RPCs, native watches and replica-aware field adapters. Custom setters
retain semantic writes; storage snapshots never grant write authority. Cover
concurrent edits, lost acknowledgements, readonly contracts and authorization.

Add receiver-free static factory dispatch, state-field binding shorthand, and
conformance-based creation. Migrate TODO, editable scaffolds and authoring guides.
Verify language/codegen, SDK, RPC, browser lifecycle, local scaffolds, production
browser bundling and CRDT persistence with temporary PostgreSQL.

.quixos-subtree-source.json

@@ -1,7 +1,7 @@
 {
   "version": 1,
-  "sourceRepo": "https://gitea-external.egads.tutti.syntaxblitz.net/quixos/quixos.git",
+  "sourceRepo": "https://gitea-external.egads.tutti.syntaxblitz.net/quixos/quixos",
-  "sourceCommit": "b384206b9c01a9ac50030a583d028b71291bc8c5",
+  "sourceCommit": "1de28b236de076d239752b77553f833dfbdb5b43",
   "sourcePath": "quixos-protocol",
   "exportName": "quixos-protocol",
   "mirrorRemote": "https://gitea-external.egads.tutti.syntaxblitz.net/quixos/quixos-protocol.git"

README.md

@@ -1,8 +1,8 @@
 # Quixos protocol and capability compiler
 
-This package owns the shared protobuf APIs for Camino, `quixos-orch`, package
+Shared protobuf APIs for Camino, orch, package runtimes/descriptors and values,
-runtimes, package descriptors, and generic runtime values. It also owns the v1
+plus the capability language/compiler. Commands below are for backend development;
-capability authoring language and semantic compiler.
+workspace authors use `qx-workspace check` for all verification.
 
 ## Capability language
 
@@ -42,6 +42,12 @@ Generics, interface composition, declarative forwarding, automatic
 relationship materialization, and first-class bundles are intentionally absent
 from v1.
 
+Local workspace fragments, source-editing APIs, and generated package contracts
+are documented in [QX bindings and tooling](../docs/QX_BINDINGS_AND_TOOLING.md).
+`quixos-resource-compile --schema-out` exports the portable generator input;
+`quixos-codegen-ts` is the first backend. `quixos-qx` provides parse, lint,
+format, and nominal-atom scaffold commands.
+
 ## Repository locks
 
 Every workspace, interface, and package repository carries a `quixos.lock`.

flake.nix

@@ -6,101 +6,152 @@
     flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { self, nixpkgs, flake-utils, ... }:
+  outputs =
-    flake-utils.lib.eachDefaultSystem (system:
+    {
+      self,
+      nixpkgs,
+      flake-utils,
+      ...
+    }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
       let
         pkgs = import nixpkgs { inherit system; };
         nodejs = pkgs.nodejs_24;
         quixos-protocol = (pkgs.callPackage ./yarn-project.nix { inherit nodejs; }) {
           src = pkgs.lib.cleanSource ./.;
           overrideAttrs = old: {
-          nativeBuildInputs = (old.nativeBuildInputs or [ ]) ++ [
+            nativeBuildInputs = (old.nativeBuildInputs or [ ]) ++ [
-            pkgs.diffutils
+              pkgs.diffutils
-            pkgs.esbuild
+              pkgs.esbuild
-            pkgs.protobuf
+              pkgs.protobuf
-          ];
+              pkgs.git
-          buildPhase = ''
+              pkgs.jujutsu
-            runHook preBuild
+              pkgs.gnutar
-            mkdir -p "$TMPDIR/generated-before"
+              pkgs.util-linux
-            cp --recursive src/gen "$TMPDIR/generated-before/proto"
+            ];
-            cp --recursive src/capability-language/generated "$TMPDIR/generated-before/capability"
+            buildPhase = ''
-            cp --recursive src/resource-lock/generated "$TMPDIR/generated-before/lock"
+              runHook preBuild
-            export QUIXOS_PROTO_PATH="${pkgs.protobuf}/include:$PWD/proto''${QUIXOS_PROTO_PATH:+:$QUIXOS_PROTO_PATH}"
+              mkdir -p "$TMPDIR/generated-before"
-            patchShebangs node_modules/.bin node_modules/@bufbuild/protoc-gen-es/bin
+              cp --recursive src/gen "$TMPDIR/generated-before/proto"
-            yarn build
+              cp --recursive src/capability-language/generated "$TMPDIR/generated-before/capability"
-            diff --recursive --unified "$TMPDIR/generated-before/proto" src/gen
+              cp --recursive src/resource-lock/generated "$TMPDIR/generated-before/lock"
-            diff --recursive --unified "$TMPDIR/generated-before/capability" src/capability-language/generated
+              export QUIXOS_PROTO_PATH="${pkgs.protobuf}/include:$PWD/proto''${QUIXOS_PROTO_PATH:+:$QUIXOS_PROTO_PATH}"
-            diff --recursive --unified "$TMPDIR/generated-before/lock" src/resource-lock/generated
+              patchShebangs node_modules/.bin node_modules/@bufbuild/protoc-gen-es/bin
-            esbuild dist/src/descriptor-check.js \
+              yarn build
-              --bundle --platform=node --target=node24 --format=esm \
+              esbuild dist/src/bindings/client.js --bundle --platform=node --target=node24 --format=esm --outfile=client-codegen.mjs
-              --outfile=quixos-descriptor-check.mjs
+              diff --recursive --unified "$TMPDIR/generated-before/proto" src/gen
-            esbuild dist/src/capability-language/cli.js \
+              diff --recursive --unified "$TMPDIR/generated-before/capability" src/capability-language/generated
-              --bundle --platform=node --target=node24 --format=esm \
+              diff --recursive --unified "$TMPDIR/generated-before/lock" src/resource-lock/generated
-              --outfile=quixos-capability-compile.mjs
+              esbuild dist/src/descriptor-check.js \
-            esbuild dist/src/capability-language/workspace-cli.js \
+                --bundle --platform=node --target=node24 --format=esm \
-              --bundle --platform=node --target=node24 --format=esm \
+                --outfile=quixos-descriptor-check.mjs
-              --outfile=quixos-workspace-compile.mjs
+              esbuild dist/src/capability-language/cli.js \
-            esbuild dist/src/capability-language/resource-cli.js \
+                --bundle --platform=node --target=node24 --format=esm \
-              --bundle --platform=node --target=node24 --format=esm \
+                --outfile=quixos-capability-compile.mjs
-              --outfile=quixos-resource-compile.mjs
+              esbuild dist/src/capability-language/workspace-cli.js \
-            esbuild dist/src/resource-lock/cli.js \
+                --bundle --platform=node --target=node24 --format=esm \
-              --bundle --platform=node --target=node24 --format=esm \
+                --outfile=quixos-workspace-compile.mjs
-              --outfile=quixos-lock-check.mjs
+              esbuild dist/src/capability-language/resource-cli.js \
-            runHook postBuild
+                --bundle --platform=node --target=node24 --format=esm \
-          '';
+                --outfile=quixos-resource-compile.mjs
-          doCheck = true;
+              esbuild dist/src/resource-lock/cli.js \
-          checkPhase = ''
+                --bundle --platform=node --target=node24 --format=esm \
-            runHook preCheck
+                --outfile=quixos-lock-check.mjs
-            yarn test
+              esbuild dist/src/bindings/cli.js --bundle --platform=node --target=node24 --format=esm --outfile=quixos-codegen-ts.mjs
-            runHook postCheck
+              esbuild dist/src/bindings/react-platform.js --bundle --platform=node --target=node24 --format=esm --outfile=react-platform.mjs
-          '';
+              esbuild dist/src/capability-language/tool-cli.js --bundle --platform=node --target=node24 --format=esm --outfile=quixos-qx.mjs
-          installPhase = ''
+              runHook postBuild
-            runHook preInstall
+            '';
-            mkdir -p "$out"
+            doCheck = true;
-            cp --reflink=auto --recursive grammar "$out/grammar"
+            checkPhase = ''
-            cp --reflink=auto --recursive proto "$out/proto"
+              runHook preCheck
-            cp --reflink=auto --recursive dist "$out/dist"
+              yarn test
-            cp package.json "$out/package.json"
+              runHook postCheck
-            mkdir -p "$out/bin"
+            '';
-            cat > "$out/bin/quixos-descriptor-check" <<EOF
+            installPhase = ''
-#!/bin/sh
+                          runHook preInstall
-export PATH="${pkgs.protobuf}/bin:\$PATH"
+                          mkdir -p "$out"
-export QUIXOS_PROTO_PATH="${pkgs.protobuf}/include:$out/proto\''${QUIXOS_PROTO_PATH:+:$QUIXOS_PROTO_PATH}"
+                          install -Dm644 nix/checked-package.nix "$out/share/checked-package.nix"
-exec ${pkgs.nodejs_24}/bin/node "$out/libexec/quixos-protocol/quixos-descriptor-check.mjs" "\$@"
+                          substitute nix/checked-candidate.nix "$out/share/checked-candidate.nix" \
-EOF
+                            --replace-fail '@nixpkgs@' '${pkgs.path}'
-            chmod +x "$out/bin/quixos-descriptor-check"
+                          cp --reflink=auto --recursive grammar "$out/grammar"
-            cat > "$out/bin/quixos-capability-compile" <<EOF
+                          cp --reflink=auto --recursive proto "$out/proto"
-#!/bin/sh
+                          cp --reflink=auto --recursive dist "$out/dist"
-exec ${pkgs.nodejs_24}/bin/node "$out/libexec/quixos-protocol/quixos-capability-compile.mjs" "\$@"
+                          cp package.json "$out/package.json"
-EOF
+                          mkdir -p "$out/bin"
-            chmod +x "$out/bin/quixos-capability-compile"
+                          for tool in quixos-codegen-ts quixos-qx; do
-            cat > "$out/bin/quixos-workspace-compile" <<EOF
+                            printf '#!/bin/sh\nexec ${pkgs.nodejs_24}/bin/node "%s/libexec/quixos-protocol/%s.mjs" "$@"\n' "$out" "$tool" > "$out/bin/$tool"
-#!/bin/sh
+                            chmod +x "$out/bin/$tool"
-exec ${pkgs.nodejs_24}/bin/node "$out/libexec/quixos-protocol/quixos-workspace-compile.mjs" "\$@"
+                          done
-EOF
+                          cat > "$out/bin/quixos-descriptor-check" <<EOF
-            chmod +x "$out/bin/quixos-workspace-compile"
+              #!/bin/sh
-            cat > "$out/bin/quixos-resource-compile" <<EOF
+              export PATH="${pkgs.protobuf}/bin:\$PATH"
-#!/bin/sh
+              export QUIXOS_PROTO_PATH="${pkgs.protobuf}/include:$out/proto\''${QUIXOS_PROTO_PATH:+:$QUIXOS_PROTO_PATH}"
-exec ${pkgs.nodejs_24}/bin/node "$out/libexec/quixos-protocol/quixos-resource-compile.mjs" "\$@"
+              exec ${pkgs.nodejs_24}/bin/node "$out/libexec/quixos-protocol/quixos-descriptor-check.mjs" "\$@"
-EOF
+              EOF
-            chmod +x "$out/bin/quixos-resource-compile"
+                          chmod +x "$out/bin/quixos-descriptor-check"
-            cat > "$out/bin/quixos-lock-check" <<EOF
+                          cat > "$out/bin/quixos-capability-compile" <<EOF
-#!/bin/sh
+              #!/bin/sh
-exec ${pkgs.nodejs_24}/bin/node "$out/libexec/quixos-protocol/quixos-lock-check.mjs" "\$@"
+              exec ${pkgs.nodejs_24}/bin/node "$out/libexec/quixos-protocol/quixos-capability-compile.mjs" "\$@"
-EOF
+              EOF
-            chmod +x "$out/bin/quixos-lock-check"
+                          chmod +x "$out/bin/quixos-capability-compile"
-            mkdir -p "$out/libexec/quixos-protocol"
+                          cat > "$out/bin/quixos-workspace-compile" <<EOF
-            install -m644 quixos-descriptor-check.mjs "$out/libexec/quixos-protocol/quixos-descriptor-check.mjs"
+              #!/bin/sh
-            install -m644 quixos-capability-compile.mjs "$out/libexec/quixos-protocol/quixos-capability-compile.mjs"
+              exec ${pkgs.nodejs_24}/bin/node "$out/libexec/quixos-protocol/quixos-workspace-compile.mjs" "\$@"
-            install -m644 quixos-workspace-compile.mjs "$out/libexec/quixos-protocol/quixos-workspace-compile.mjs"
+              EOF
-            install -m644 quixos-resource-compile.mjs "$out/libexec/quixos-protocol/quixos-resource-compile.mjs"
+                          chmod +x "$out/bin/quixos-workspace-compile"
-            install -m644 quixos-lock-check.mjs "$out/libexec/quixos-protocol/quixos-lock-check.mjs"
+                          cat > "$out/bin/quixos-resource-compile" <<EOF
-            runHook postInstall
+              #!/bin/sh
-          '';
+              exec ${pkgs.nodejs_24}/bin/node "$out/libexec/quixos-protocol/quixos-resource-compile.mjs" "\$@"
+              EOF
+                          chmod +x "$out/bin/quixos-resource-compile"
+                          cat > "$out/bin/quixos-lock-check" <<EOF
+              #!/bin/sh
+              exec ${pkgs.nodejs_24}/bin/node "$out/libexec/quixos-protocol/quixos-lock-check.mjs" "\$@"
+              EOF
+                          chmod +x "$out/bin/quixos-lock-check"
+                          mkdir -p "$out/libexec/quixos-protocol"
+                          install -m644 client-codegen.mjs "$out/libexec/quixos-protocol/client-codegen.mjs"
+                          install -m644 react-platform.mjs "$out/libexec/quixos-protocol/react-platform.mjs"
+                          install -m644 quixos-codegen-ts.mjs quixos-qx.mjs "$out/libexec/quixos-protocol/"
+                          install -m644 quixos-descriptor-check.mjs "$out/libexec/quixos-protocol/quixos-descriptor-check.mjs"
+                          install -m644 quixos-capability-compile.mjs "$out/libexec/quixos-protocol/quixos-capability-compile.mjs"
+                          install -m644 quixos-workspace-compile.mjs "$out/libexec/quixos-protocol/quixos-workspace-compile.mjs"
+                          install -m644 quixos-resource-compile.mjs "$out/libexec/quixos-protocol/quixos-resource-compile.mjs"
+                          install -m644 quixos-lock-check.mjs "$out/libexec/quixos-protocol/quixos-lock-check.mjs"
+                          runHook postInstall
+            '';
           };
         };
-      in {
+      in
+      {
         packages.default = quixos-protocol;
+        packages.inspector = (pkgs.callPackage ./yarn-project.nix { inherit nodejs; }) {
+          src = pkgs.lib.fileset.toSource {
+            root = ./.;
+            fileset = pkgs.lib.fileset.unions [
+              ./package.json
+              ./yarn.lock
+              ./.yarnrc.yml
+              ./.yarn/plugins
+              ./src
+            ];
+          };
+          overrideAttrs = old: {
+            nativeBuildInputs = (old.nativeBuildInputs or [ ]) ++ [ pkgs.esbuild ];
+            doCheck = false;
+            buildPhase = ''
+              esbuild src/capability-language/inspect-cli.ts --bundle --platform=node --target=node24 --format=esm --outfile=inspect.mjs
+            '';
+            installPhase = ''
+              mkdir -p "$out/bin" "$out/lib"
+              cp inspect.mjs "$out/lib/inspect.mjs"
+              printf '#!${pkgs.runtimeShell}\nexec ${nodejs}/bin/node --max-old-space-size=128 %s/lib/inspect.mjs\n' "$out" > "$out/bin/quixos-qx-inspect"
+              chmod +x "$out/bin/quixos-qx-inspect"
+            '';
+          };
+        };
         checks.default = quixos-protocol;
         devShells.default = pkgs.mkShell {
           packages = [
@@ -120,5 +171,6 @@ EOF
             export QUIXOS_PROTO_PATH="${pkgs.protobuf}/include:$PWD/proto''${QUIXOS_PROTO_PATH:+:$QUIXOS_PROTO_PATH}"
           '';
         };
-      });
+      }
+    );
 }

grammar/QuixosCapability.g4

@@ -4,6 +4,15 @@ document
   : workspaceDecl EOF
   | interfaceResourceDecl EOF
   | packageResourceDecl EOF
+  | fragmentDecl EOF
+  ;
+
+fragmentDecl
+  : FRAGMENT LBRACE workspaceItem* RBRACE
+  ;
+
+sourceImportDecl
+  : IMPORT stringLiteral SEMI
   ;
 
 workspaceDecl
@@ -12,11 +21,13 @@ workspaceDecl
   ;
 
 workspaceItem
-  : atomDecl
+  : sourceImportDecl
+  | atomDecl
   | resourceImportDecl
   | sharedAttachmentDecl
   | conformanceDecl
   | constructorBindingDecl
+  | typeAliasDecl
   ;
 
 resourceImportDecl
@@ -36,6 +47,7 @@ resourcePreamble
   : resourceImportDecl
   | externalAtomDecl
   | externalInterfaceDecl
+  | typeAliasDecl
   ;
 
 atomDecl
@@ -43,10 +55,39 @@ atomDecl
   ;
 
 interfaceResourceDecl
-  : resourcePreamble* INTERFACE identifier ID stringLiteral REVISION stringLiteral
+  : resourcePreamble* INTERFACE identifier typeParameters? ID stringLiteral REVISION stringLiteral
+    (REQUIRES interfaceType (COMMA interfaceType)*)?
     LBRACE interfaceMember* RBRACE
   ;
 
+typeParameters
+  : LT typeParameter (COMMA typeParameter)* GT
+  ;
+
+typeParameter
+  : VALUE identifier (COLON STORABLE)?
+  | OBJECT identifier (IMPLEMENTS interfaceType (AMP interfaceType)*)?
+  ;
+
+interfaceType
+  : identifier typeArguments?
+  ;
+
+typeArguments
+  : LT typeArgument (COMMA typeArgument)* GT
+  ;
+
+typeArgument
+  : ATOM identifier
+  | INTERFACE interfaceType
+  | OBJECT identifier
+  | valueType
+  ;
+
+typeAliasDecl
+  : TYPE identifier typeParameters? EQUAL valueType SEMI
+  ;
+
 interfaceMember
   : valueMember
   | relationshipMember
@@ -54,7 +95,7 @@ interfaceMember
   ;
 
 operationMember
-  : OPERATION identifier ID stringLiteral COLON valueType ARROW valueType
+  : STATIC? OPERATION identifier ID stringLiteral COLON valueType ARROW valueType
     LBRACE CALL ID stringLiteral SEMI RBRACE
   ;
 
@@ -83,11 +124,13 @@ relationshipOperation
 
 targetConstraint
   : ATOM identifier
-  | INTERFACE identifier
+  | INTERFACE identifier typeArguments?
+  | OBJECT identifier
   ;
 
 packageResourceDecl
   : resourcePreamble* PACKAGE identifier ID stringLiteral REVISION stringLiteral
+    (SEMANTIC_MAJOR INTEGER)?
     LBRACE packageExport* RBRACE
   ;
 
@@ -98,12 +141,12 @@ packageExport
   ;
 
 packageOperationExport
-  : OPERATION identifier ID stringLiteral COLON valueType ARROW valueType
+  : OPERATION identifier typeParameters? ID stringLiteral COLON valueType ARROW valueType
     MODE operationMode eventClause? RECEIVER receiverRequirement dependencyBlock? SEMI
   ;
 
 packageFunctionExport
-  : FUNCTION identifier ID stringLiteral COLON valueType ARROW valueType
+  : FUNCTION identifier typeParameters? ID stringLiteral COLON valueType ARROW valueType
     dependencyBlock? SEMI
   ;
 
@@ -127,7 +170,8 @@ operationMode
 receiverRequirement
   : ANY
   | ATOM identifier
-  | INTERFACES LBRACK identifierList? RBRACK
+  | OBJECT identifier
+  | INTERFACES LBRACK (interfaceType (COMMA interfaceType)*)? RBRACK
   ;
 
 identifierList
@@ -141,8 +185,8 @@ dependencyBlock
 dependencyPort
   : STATE identifier ID stringLiteral COLON valueType primitiveList SEMI
   | EDGE identifier ID stringLiteral COLON cardinality targetConstraint primitiveList SEMI
-  | INTERFACE identifier ID stringLiteral COLON identifier SEMI
+  | INTERFACE identifier ID stringLiteral COLON identifier typeArguments? SEMI
-  | CONSTRUCTOR identifier ID stringLiteral COLON identifier SEMI
+  | CONSTRUCTOR identifier ID stringLiteral COLON identifier (INPUT valueType)? SEMI
   ;
 
 primitiveList
@@ -183,19 +227,26 @@ edgeDecl
   ;
 
 edgeEndpoint
-  : targetConstraint PROJECTION identifier ID stringLiteral cardinality ORDERED? SEMI
+  : targetConstraint PROJECTION identifier ID stringLiteral cardinality ORDERED?
+    (ON_DELETE stringLiteral)? RETAIN_OTHER? (KEYED stringLiteral)? PUBLIC_TRAVERSAL? SEMI
   ;
 
 conformanceDecl
-  : CONFORM identifier AS identifier LBRACE conformanceItem* RBRACE
+  : CONFORM identifier AS identifier typeArguments? (ID stringLiteral)? (SEMANTIC_MAJOR INTEGER)?
+    LBRACE conformanceItem* RBRACE
   ;
 
 conformanceItem
   : PRIVATE attachmentDecl
   | operationBindingDecl
+  | stateFieldBindingDecl
   | relationshipMaterializationDecl
   ;
 
+stateFieldBindingDecl
+  : BIND identifier TO STATE identifier SEMI
+  ;
+
 relationshipMaterializationDecl
   : MATERIALIZE identifier IF ABSENT USING CONSTRUCTOR identifier VIA EDGE identifier DOT identifier SEMI
   ;
@@ -225,7 +276,7 @@ operationName
 operationProvider
   : STATE identifier DOT statePrimitive
   | EDGE identifier DOT identifier DOT edgePrimitive
-  | PACKAGE identifier DOT identifier dependencyBindingBlock?
+  | PACKAGE identifier DOT identifier typeArguments? dependencyBindingBlock?
   ;
 
 statePrimitive
@@ -250,7 +301,7 @@ dependencyBindingBlock
 dependencyBinding
   : identifier TO STATE identifier (VIA EDGE identifier DOT identifier)? SEMI
   | identifier TO EDGE identifier DOT identifier (VIA EDGE identifier DOT identifier)? SEMI
-  | identifier TO INTERFACE identifier (VIA EDGE identifier DOT identifier)? SEMI
+  | identifier TO INTERFACE identifier typeArguments? (VIA EDGE identifier DOT identifier)? SEMI
   | identifier TO CONSTRUCTOR identifier SEMI
   ;
 
@@ -264,9 +315,16 @@ valueType
   | WATCH_HANDLE
   | MESSAGE stringLiteral
   | ATOM_REF LT identifier GT
-  | INTERFACE_REF LT identifier GT
+  | INTERFACE_REF LT identifier typeArguments? GT
+  | REF LT identifier GT
   | OPTIONAL LT valueType GT
   | LIST LT valueType GT
+  | RECORD LBRACE recordField* RBRACE
+  | identifier typeArguments?
+  ;
+
+recordField
+  : identifier COLON valueType SEMI
   ;
 
 scalarType
@@ -320,6 +378,12 @@ stringLiteral
   ;
 
 WORKSPACE: 'workspace';
+TYPE: 'type';
+OBJECT: 'object';
+STORABLE: 'storable';
+IMPLEMENTS: 'implements';
+REF: 'ref';
+FRAGMENT: 'fragment';
 IMPORT: 'import';
 EXTERNAL: 'external';
 ATOM: 'atom';
@@ -332,9 +396,11 @@ OPERATION: 'operation';
 FUNCTION: 'function';
 CONSTRUCTOR: 'constructor';
 CONSTRUCTS: 'constructs';
+INPUT: 'input';
 CONFORM: 'conform';
 AS: 'as';
 BIND: 'bind';
+STATIC: 'static';
 TO: 'to';
 PRIVATE: 'private';
 SHARED: 'shared';
@@ -354,6 +420,11 @@ SOURCE: 'source';
 REPOSITORY: 'repository';
 COMMIT: 'commit';
 REVISION: 'revision';
+SEMANTIC_MAJOR: 'semantic-major';
+ON_DELETE: 'on-delete';
+RETAIN_OTHER: 'retain-other';
+KEYED: 'keyed';
+PUBLIC_TRAVERSAL: 'public-traversal';
 ID: 'id';
 DOC: 'doc';
 MODE: 'mode';
@@ -390,6 +461,7 @@ ATOM_REF: 'atom-ref';
 INTERFACE_REF: 'interface-ref';
 OPTIONAL: 'optional';
 LIST: 'list';
+RECORD: 'record';
 BOOL: 'bool';
 BYTES: 'bytes';
 DOUBLE: 'double';
@@ -415,6 +487,8 @@ LPAREN: '(';
 RPAREN: ')';
 LT: '<';
 GT: '>';
+AMP: '&';
+EQUAL: '=';
 
 INTEGER: '-'? [0-9]+;
 JSON_NUMBER: '-'? ('0' | [1-9] [0-9]*) ('.' [0-9]+)? ([eE] [+-]? [0-9]+)?;
@@ -423,6 +497,6 @@ STRING_LITERAL: '"' (ESC | ~["\\\r\n])* '"';
 fragment ESC: '\\' (["\\/bfnrt] | 'u' HEX HEX HEX HEX);
 fragment HEX: [0-9a-fA-F];
 
-LINE_COMMENT: '//' ~[\r\n]* -> skip;
+LINE_COMMENT: '//' ~[\r\n]* -> channel(HIDDEN);
-BLOCK_COMMENT: '/*' .*? '*/' -> skip;
+BLOCK_COMMENT: '/*' .*? '*/' -> channel(HIDDEN);
-WS: [ \t\r\n]+ -> skip;
+WS: [ \t\r\n]+ -> channel(HIDDEN);

nix/checked-candidate.nix

@@ -0,0 +1,140 @@
+# All source trees and recursive locks are fetched by Nix at exact retained
+# revisions. No authoring-directory overlay or externally assembled schema.
+{
+  repository,
+  commit,
+  kind,
+  generator,
+  contractOnly ? false,
+  system ? builtins.currentSystem,
+}:
+let
+  pkgs = import (/. + "@nixpkgs@") { inherit system; };
+  protocol = builtins.storePath generator;
+  sourceKey = source: "${source.kind}:${source.repository}@${source.commit}";
+  fetch =
+    source:
+    builtins.fetchGit {
+      url = source.repository;
+      rev = source.commit;
+      ref = "refs/tags/quixos-reachability/${source.commit}";
+      shallow = true;
+    };
+  load =
+    ancestors: source:
+    if builtins.elem (sourceKey source) ancestors then
+      throw "Source dependency cycle at ${sourceKey source}"
+    else if builtins.length ancestors >= 100 then
+      throw "Source dependency depth exceeds 100"
+    else
+      let
+        directory = fetch source;
+        lockFile = pkgs.runCommand "qx-source-lock.json" { } ''
+          ${protocol}/bin/quixos-lock-check ${directory}/quixos.lock > "$out"
+        '';
+        lock = builtins.fromJSON (builtins.readFile lockFile);
+        children = map (
+          entry: load (ancestors ++ [ (sourceKey source) ]) (entry.source // { inherit (entry) kind; })
+        ) lock.resources;
+      in
+      source // { inherit directory children; };
+  root = load [ ] { inherit kind repository commit; };
+  flatten = node: [ node ] ++ pkgs.lib.concatMap flatten node.children;
+  nodes = builtins.attrValues (
+    builtins.listToAttrs (
+      map (node: {
+        name = sourceKey node;
+        value = node;
+      }) (flatten root)
+    )
+  );
+  snapshots = pkgs.writeText "qx-nix-source-graph.json" (
+    builtins.toJSON {
+      resources = map (node: {
+        inherit (node)
+          kind
+          repository
+          commit
+          directory
+          ;
+      }) (builtins.filter (node: node.kind != "workspace") nodes);
+    }
+  );
+  compile =
+    node:
+    pkgs.runCommand "qx-${node.kind}-contract" { } ''
+      mkdir -p "$out"
+      ${
+        if node.kind == "workspace" then
+          ''
+            ${protocol}/bin/quixos-workspace-compile --root ${node.directory} \
+              --source-root-commit ${pkgs.lib.escapeShellArg node.commit} \
+              --checkout-root "$TMPDIR/checkouts" --snapshot-map ${snapshots} \
+              --graph-out "$out/graph.json" --schemas-out "$out/package-schemas.json" > "$out/candidate.json"
+          ''
+        else
+          ''
+            ${protocol}/bin/quixos-resource-compile --root ${node.directory} \
+              --kind ${node.kind} --repository ${pkgs.lib.escapeShellArg node.repository} \
+              --commit ${pkgs.lib.escapeShellArg node.commit} \
+              --checkout-root "$TMPDIR/checkouts" --snapshot-map ${snapshots} --snapshot-only true \
+              --graph-out "$out/graph.json" --schema-out "$out/bindings.json" > "$out/candidate.json"
+          ''
+      }
+    '';
+  contract = compile root;
+  checkPackage =
+    node:
+    let
+      compiled = compile node;
+      candidate = builtins.fromJSON (builtins.readFile "${compiled}/candidate.json");
+      package = builtins.getFlake (
+        "git+${node.repository}?rev=${node.commit}&ref=refs/tags/quixos-reachability/${node.commit}"
+      );
+      checked =
+        package.quixosPackages.${system}.checkedServer
+          or (throw "Package ${node.repository} lacks checkedServer; use the supported package scaffold.");
+      artifact = checked {
+        schema =
+          if kind == "workspace" then
+            pkgs.writeText "package-specialization-schema.json" (
+              builtins.toJSON
+                (builtins.fromJSON (builtins.readFile "${contract}/package-schemas.json"))
+                .${candidate.revision.revisionId}
+            )
+          else
+            "${compiled}/bindings.json";
+        generator = protocol;
+        packageRevisionId = candidate.revision.revisionId;
+      };
+    in
+    {
+      packageRevisionId = candidate.revision.revisionId;
+      artifactPath = artifact;
+    };
+  checks =
+    if contractOnly then
+      [ ]
+    else
+      map checkPackage (builtins.filter (node: node.kind == "package") nodes);
+  manifest = pkgs.writeText "qx-candidate-checks.json" (builtins.toJSON checks);
+  bindingOptions = pkgs.writeText "qx-typescript-options.json" (
+    builtins.toJSON (
+      (builtins.fromJSON (builtins.readFile "${root.directory}/quixos.check.json")).options or { }
+    )
+  );
+in
+pkgs.runCommand (if contractOnly then "qx-contract" else "qx-checked-candidate") { } ''
+  mkdir -p "$out"
+  cp ${contract}/candidate.json "$out/candidate.json"
+  cp ${contract}/graph.json "$out/graph.json"
+  cp ${manifest} "$out/checks.json"
+  ${pkgs.lib.optionalString (
+    kind != "workspace"
+  ) ''cp ${contract}/bindings.json "$out/bindings.json"''}
+  ${pkgs.lib.optionalString (kind == "package") ''
+    ${protocol}/bin/quixos-codegen-ts ${contract}/bindings.json \
+      ${pkgs.lib.escapeShellArg (builtins.fromJSON (builtins.readFile "${contract}/candidate.json")).revision.revisionId} \
+      "$out/bindings.ts" ${bindingOptions}
+  ''}
+''

nix/checked-package.nix

@@ -0,0 +1,35 @@
+# One derivation path for provisional checking and activation. The source and
+# schema come from exact committed inputs resolved by the Quixos compiler.
+{
+  source,
+  schema,
+  generator,
+  packageRevisionId,
+  system ? builtins.currentSystem,
+}:
+let
+  packageSource = builtins.path {
+    path = /. + source;
+    name = "quixos-package-source";
+    filter =
+      path: _:
+      let
+        name = baseNameOf path;
+      in
+      name != ".git" && name != ".jj";
+  };
+  package = builtins.getFlake (
+    "path:" + builtins.unsafeDiscardStringContext (toString packageSource)
+  );
+  checked =
+    package.quixosPackages.${system}.checkedServer
+      or (throw "Package ${packageRevisionId} lacks checkedServer; use the supported package scaffold.");
+in
+checked {
+  inherit packageRevisionId;
+  schema = builtins.path {
+    path = /. + schema;
+    name = "candidate-package-bindings.json";
+  };
+  generator = builtins.storePath generator;
+}

package.json

@@ -6,12 +6,15 @@
   "type": "module",
   "bin": {
     "quixos-capability-compile": "dist/src/capability-language/cli.js",
-    "quixos-resource-compile": "dist/src/capability-language/resource-cli.js",
+    "quixos-codegen-ts": "dist/src/bindings/cli.js",
-    "quixos-workspace-compile": "dist/src/capability-language/workspace-cli.js",
     "quixos-descriptor-check": "dist/src/descriptor-check.js",
-    "quixos-lock-check": "dist/src/resource-lock/cli.js"
+    "quixos-lock-check": "dist/src/resource-lock/cli.js",
+    "quixos-qx": "dist/src/capability-language/tool-cli.js",
+    "quixos-resource-compile": "dist/src/capability-language/resource-cli.js",
+    "quixos-workspace-compile": "dist/src/capability-language/workspace-cli.js"
   },
   "exports": {
+    "./bindings": "./dist/src/bindings/index.js",
     "./capability-model": "./dist/src/capability-model/index.js",
     "./capability-language": "./dist/src/capability-language/index.js",
     "./resource-lock": "./dist/src/resource-lock/index.js",
@@ -26,6 +29,7 @@
     "typecheck": "yarn generate && tsc --noEmit"
   },
   "dependencies": {
+    "@babel/parser": "^7.28.0",
     "@bufbuild/protobuf": "^2.12.1",
     "@bufbuild/protoc-gen-es": "^2.12.1",
     "antlr4ng": "^3.0.16"

proto/camino/api.proto

@@ -15,14 +15,22 @@ service CaminoService {
   rpc ConnectEdge(ConnectEdgeRequest) returns (ConnectEdgeResponse);
   rpc ResolveEdge(ResolveEdgeRequest) returns (ResolveEdgeResponse);
   rpc DisconnectEdge(DisconnectEdgeRequest) returns (DisconnectEdgeResponse);
+  rpc ReadCollection(ResolveEdgeRequest) returns (ReadCollectionResponse);
+  rpc ReplaceCollection(ReplaceCollectionRequest) returns (ReadCollectionResponse);
   rpc ListOps(ListOpsRequest) returns (ListOpsResponse);
   rpc WatchObject(WatchObjectRequest) returns (stream WatchObjectEvent);
 }
 
 message NullValue {}
-message ObjectValue { map<string, Value> fields = 1; }
+message ObjectValue {
-message ListValue { repeated Value values = 1; }
+  map<string, Value> fields = 1;
-message RefValue { string object_id = 1; }
+}
+message ListValue {
+  repeated Value values = 1;
+}
+message RefValue {
+  string object_id = 1;
+}
 message CrdtValue {
   string type = 1;
   string encoding = 2;
@@ -41,7 +49,9 @@ message StateValueSource {
   CrdtValue crdt_snapshot = 6;
 }
 
-message ValueSource { StateValueSource state = 1; }
+message ValueSource {
+  StateValueSource state = 1;
+}
 
 message Value {
   oneof kind {
@@ -59,26 +69,44 @@ message Value {
   ValueSource source = 11;
 }
 
-message InstallPersistencePlanRequest { PersistencePlan plan = 1; }
+message InstallPersistencePlanRequest {
-message InstallPersistencePlanResponse { PersistencePlan plan = 1; }
+  PersistencePlan plan = 1;
+}
+message InstallPersistencePlanResponse {
+  PersistencePlan plan = 1;
+}
 message GetPersistencePlanRequest {}
-message GetPersistencePlanResponse { PersistencePlan plan = 1; }
+message GetPersistencePlanResponse {
+  PersistencePlan plan = 1;
+}
 
 message CreateObjectRequest {
   string atom_id = 1;
   map<string, Value> initial_state = 2;
 }
-message CreateObjectResponse { CaminoObject object = 1; }
+message CreateObjectResponse {
-message GetObjectRequest { string object_id = 1; }
+  CaminoObject object = 1;
-message GetObjectResponse { CaminoObject object = 1; }
+}
-message ListObjectsRequest { string atom_id = 1; }
+message GetObjectRequest {
-message ListObjectsResponse { repeated CaminoObject objects = 1; }
+  string object_id = 1;
+}
+message GetObjectResponse {
+  CaminoObject object = 1;
+}
+message ListObjectsRequest {
+  string atom_id = 1;
+}
+message ListObjectsResponse {
+  repeated CaminoObject objects = 1;
+}
 
 message ReadStateRequest {
   string object_id = 1;
   string slot_id = 2;
 }
-message ReadStateResponse { Value value = 1; }
+message ReadStateResponse {
+  Value value = 1;
+}
 message WriteStateRequest {
   string object_id = 1;
   string slot_id = 2;
@@ -98,22 +126,54 @@ message ConnectEdgeRequest {
   optional int32 ordinal = 5;
   optional int32 target_ordinal = 6;
 }
-message ConnectEdgeResponse { CaminoEdge edge = 1; }
+message ConnectEdgeResponse {
+  CaminoEdge edge = 1;
+}
 message ResolveEdgeRequest {
   string object_id = 1;
   string edge_type_id = 2;
   string projection_id = 3;
 }
-message ResolveEdgeResponse { repeated CaminoEdge edges = 1; }
+message ResolveEdgeResponse {
-message DisconnectEdgeRequest { string edge_id = 1; }
+  repeated CaminoEdge edges = 1;
-message DisconnectEdgeResponse { string edge_id = 1; }
+}
+message DisconnectEdgeRequest {
+  string edge_id = 1;
+}
+message DisconnectEdgeResponse {
+  string edge_id = 1;
+}
 
-message ListOpsRequest { string object_id = 1; }
+message CollectionEntry {
-message ListOpsResponse { repeated CaminoOp ops = 1; }
+  // Existing entry identity to preserve; empty allocates a new canonical edge.
+  string edge_id = 1;
+  string target_object_id = 2;
+  Value key = 3;
+}
+message ReadCollectionResponse {
+  uint64 revision = 1;
+  repeated CollectionEntry entries = 2;
+}
+message ReplaceCollectionRequest {
+  string object_id = 1;
+  string edge_type_id = 2;
+  string projection_id = 3;
+  uint64 expected_revision = 4;
+  repeated CollectionEntry entries = 5;
+}
+
+message ListOpsRequest {
+  string object_id = 1;
+}
+message ListOpsResponse {
+  repeated CaminoOp ops = 1;
+}
 message WatchObjectRequest {
   string object_id = 1;
   string after_op_id = 2;
   bool include_snapshot = 3;
+  // Managed runtimes must watch only their injected attachments.
+  repeated string attachment_ids = 4;
 }
 message WatchObjectEvent {
   string object_id = 1;
@@ -141,6 +201,8 @@ message CaminoEdge {
   optional int32 first_ordinal = 7;
   optional int32 second_ordinal = 8;
   string created_at = 9;
+  string first_key_json = 10;
+  string second_key_json = 11;
 }
 
 message CaminoOp {

proto/camino/schema.proto

@@ -18,6 +18,7 @@ message AtomDefinition {
 message AtomConformance {
   string atom_id = 1;
   string interface_revision_id = 2;
+  string conformance_id = 3;
 }
 
 message StateAttachment {
@@ -27,6 +28,7 @@ message StateAttachment {
   string value_type_json = 4;
   string storage_policy_json = 5;
   string default_value_json = 6;
+  string owner_conformance_id = 7;
 }
 
 message EndpointConstraint {
@@ -42,6 +44,13 @@ message EdgeEndpoint {
   EndpointConstraint constraint = 3;
   Cardinality cardinality = 4;
   bool ordered = 5;
+  // Empty means restrict. Direction is the endpoint being deleted.
+  string on_delete = 6;
+  bool retain_other = 7;
+  // Empty for sets/lists, otherwise string, boolean, or int64 map keys.
+  string key_type = 8;
+  // Explicit read-only dependency injection traversal, not mutation authority.
+  bool public_traversal = 9;
 }
 
 message EdgeAttachment {
@@ -49,6 +58,7 @@ message EdgeAttachment {
   string display_name = 2;
   EdgeEndpoint first = 3;
   EdgeEndpoint second = 4;
+  string owner_conformance_id = 5;
 }
 
 // Camino consumes this persistence-only projection of a checked workspace.

proto/quixos/orch.proto

@@ -9,9 +9,12 @@ import "quixos/runtime.proto";
 
 service OrchestratorRuntime {
   rpc InvokeCapability(InvokeCapabilityRequest) returns (InvokeCapabilityResponse);
+  rpc EditCapabilityField(EditCapabilityFieldRequest) returns (InvokeCapabilityResponse);
+  rpc InvokeClassCapability(InvokeClassCapabilityRequest) returns (InvokeCapabilityResponse);
   rpc WatchCapability(WatchCapabilityRequest) returns (stream WatchCapabilityEvent);
   rpc ConstructObject(ConstructObjectRequest) returns (ConstructObjectResponse);
-  rpc ResolveOrConstructRelatedObject(ResolveOrConstructRelatedObjectRequest) returns (ResolveOrConstructRelatedObjectResponse);
+  rpc ResolveOrConstructRelatedObject(ResolveOrConstructRelatedObjectRequest)
+      returns (ResolveOrConstructRelatedObjectResponse);
   rpc GetWorkspace(GetWorkspaceRequest) returns (GetWorkspaceResponse);
   rpc ListPackageDescriptors(ListPackageDescriptorsRequest) returns (ListPackageDescriptorsResponse);
   rpc ListPackageRuntimes(ListPackageRuntimesRequest) returns (ListPackageRuntimesResponse);
@@ -23,7 +26,9 @@ message ConstructObjectRequest {
   string atom_id = 1;
   map<string, camino.Value> input = 2;
 }
-message ConstructObjectResponse { camino.CaminoObject object = 1; }
+message ConstructObjectResponse {
+  camino.CaminoObject object = 1;
+}
 
 message ResolveOrConstructRelatedObjectRequest {
   string object_id = 1;
@@ -43,6 +48,11 @@ message InvokeCapabilityRequest {
   // layers so a live-value controller can recognize its own confirmation.
   string client_mutation_id = 4;
 }
+message InvokeClassCapabilityRequest {
+  string conformance_id = 1;
+  string operation_id = 2;
+  map<string, camino.Value> input = 3;
+}
 message InvokeCapabilityResponse {
   string invocation_id = 1;
   Activation activation = 2;
@@ -50,6 +60,24 @@ message InvokeCapabilityResponse {
   camino.Value result = 4;
   string error = 5;
   repeated quixos.runtime.DerivedDependency dependencies = 6;
+  FieldEditing field_editing = 7;
+}
+
+// Resolved from the checked native getter/setter binding, not Value.source.
+message FieldEditing {
+  string getter_operation_id = 1;
+  string setter_operation_id = 2;
+  string document_type = 3;
+  string binding_digest = 4;
+}
+message EditCapabilityFieldRequest {
+  // The public getter; setter must belong to the same value member.
+  quixos.CapabilityRef capability = 1;
+  string object_id = 2;
+  string setter_operation_id = 3;
+  string binding_digest = 4;
+  camino.CrdtValue update = 5;
+  string client_mutation_id = 6;
 }
 
 message WatchCapabilityRequest {
@@ -65,22 +93,63 @@ message WatchCapabilityEvent {
   repeated quixos.runtime.DerivedDependency dependencies = 5;
   string error = 6;
   bool initial = 7;
+  FieldEditing field_editing = 8;
 }
 
-message GetWorkspaceRequest {}
+message GetWorkspaceRequest {
+  // Revision polling must not download the entire interface graph.
+  bool include_interface_contracts = 1;
+}
 message GetWorkspaceResponse {
   string workspace_id = 1;
   string workspace_revision_id = 2;
   string source_root_commit = 3;
+  // Checked constructors whose wire input can be empty. The create panel uses
+  // class factory conformances instead of this constructor inventory.
+  repeated string empty_input_constructible_atom_ids = 4;
+  repeated CapabilityInputContract capability_inputs = 5;
+  repeated ConstructorInputContract constructor_inputs = 6;
+  // Exact closed interface contracts used by checked presentation consumers.
+  string interfaces_json = 7;
+  repeated ClassCapability class_capabilities = 8;
+}
+message ClassCapability {
+  string conformance_id = 1;
+  string atom_id = 2;
+  string interface_revision_id = 3;
+  string definition_id = 4;
+  string operation_id = 5;
+  string input_type_json = 6;
+  string output_type_json = 7;
+}
+message CapabilityInputContract {
+  string interface_revision_id = 1;
+  string operation_id = 2;
+  string type_json = 3;
+}
+message ConstructorInputContract {
+  string atom_id = 1;
+  string type_json = 2;
 }
 message ListActivationsRequest {}
 message ListPackageDescriptorsRequest {}
-message ListPackageDescriptorsResponse { repeated quixos.PackageDescriptor descriptors = 1; }
+message ListPackageDescriptorsResponse {
+  repeated quixos.PackageDescriptor descriptors = 1;
+}
 message ListPackageRuntimesRequest {}
-message ListPackageRuntimesResponse { repeated PackageRuntimeStatus runtimes = 1; }
+message ListPackageRuntimesResponse {
-message ListActivationsResponse { repeated Activation activations = 1; }
+  repeated PackageRuntimeStatus runtimes = 1;
-message CloseActivationRequest { string activation_id = 1; string reason = 2; }
+}
-message CloseActivationResponse { Activation activation = 1; }
+message ListActivationsResponse {
+  repeated Activation activations = 1;
+}
+message CloseActivationRequest {
+  string activation_id = 1;
+  string reason = 2;
+}
+message CloseActivationResponse {
+  Activation activation = 1;
+}
 
 message Activation {
   string activation_id = 1;

proto/quixos/runtime.proto

@@ -9,13 +9,39 @@ service PackageRuntime {
   rpc Handshake(HandshakeRequest) returns (HandshakeResponse);
   rpc Invoke(InvokeRequest) returns (InvokeResponse);
   rpc Watch(WatchRequest) returns (stream WatchEvent);
+  rpc GetInvocationStatus(InvocationControlRequest) returns (InvocationStatus);
+  rpc CancelInvocation(InvocationControlRequest) returns (InvocationStatus);
 }
 
-message HandshakeRequest { string orch_protocol_version = 1; }
+message HandshakeRequest {
+  string orch_protocol_version = 1;
+  string nonce = 2;
+}
 message HandshakeResponse {
   string package_revision_id = 1;
   string runtime_protocol_version = 2;
   repeated string export_ids = 3;
+  string instance_id = 4;
+  string authentication_proof = 5;
+  repeated string capabilities = 6;
+}
+
+message InvocationContext {
+  string workspace_epoch = 1;
+  string instance_id = 2;
+  string binding_digest = 3;
+  string grant = 4;
+  string session_id = 5;
+  // Host-selected owner; packages must not invent workspace-local ownership.
+  string owner_conformance_id = 6;
+}
+message InvocationControlRequest {
+  string invocation_id = 1;
+}
+message InvocationStatus {
+  string invocation_id = 1;
+  // unknown, running, cancellation-requested, completed, failed
+  string state = 2;
 }
 
 message InvokeRequest {
@@ -24,6 +50,7 @@ message InvokeRequest {
   string object_id = 3;
   map<string, camino.Value> input = 4;
   repeated quixos.InjectedDependency dependencies = 5;
+  InvocationContext context = 6;
 }
 message InvokeResponse {
   bool ok = 1;
@@ -38,6 +65,7 @@ message WatchRequest {
   string object_id = 3;
   map<string, camino.Value> input = 4;
   repeated quixos.InjectedDependency dependencies = 5;
+  InvocationContext context = 6;
 }
 
 message DerivedDependency {

src/bindings/bundle-policy.ts

@@ -0,0 +1,52 @@
+import { parse } from "@babel/parser";
+import fs from "node:fs/promises";
+import path from "node:path";
+
+/** Enforce the authored bundled-code contract, not a security sandbox. */
+export function bundlePolicyErrors(source: string, filename: string): string[] {
+  const ast = parse(source, { sourceType: "module", plugins: ["typescript", "jsx"] });
+  const errors: string[] = [];
+  const visit = (value: unknown) => {
+    if (Array.isArray(value)) {
+      value.forEach(visit);
+      return;
+    }
+    if (!value || typeof value !== "object") return;
+    const n = value as Record<string, any>;
+    if (typeof n.type !== "string") return;
+    const fail = (message: string) => errors.push(`${filename}:${n.loc?.start.line ?? 1}: ${message}`);
+    if (n.type === "MetaProperty" && n.meta.name === "import")
+      fail("Bundled package code cannot use import.meta; import packaged assets statically");
+    if (n.type === "Identifier" && ["__dirname", "__filename"].includes(n.name))
+      fail("Bundled package code cannot depend on module filesystem locations");
+    if (["CallExpression", "NewExpression"].includes(n.type)) {
+      if (n.callee?.type === "Identifier" && ["eval", "Function"].includes(n.callee.name))
+        fail("Dynamic code generation is unsupported in bundled package code");
+      if (
+        (n.callee?.type === "Import" || (n.callee?.type === "Identifier" && n.callee.name === "require")) &&
+        (n.arguments.length !== 1 || n.arguments[0].type !== "StringLiteral")
+      )
+        fail("Module imports must have a static string specifier");
+    }
+    if (n.type === "ImportExpression" && n.source.type !== "StringLiteral")
+      fail("Module imports must have a static string specifier");
+    Object.values(n).forEach(visit);
+  };
+  visit(ast);
+  return errors;
+}
+export async function checkBundleSources(directory: string): Promise<void> {
+  const errors: string[] = [];
+  async function walk(current: string) {
+    for (const entry of await fs.readdir(current, { withFileTypes: true })) {
+      if (["gen", "node_modules"].includes(entry.name)) continue;
+      const file = path.join(current, entry.name);
+      if (entry.isSymbolicLink()) throw new Error(`Authored source symlinks are unsupported: ${file}`);
+      if (entry.isDirectory()) await walk(file);
+      else if (/\.[cm]?[jt]sx?$/.test(entry.name) && !entry.name.endsWith(".d.ts"))
+        errors.push(...bundlePolicyErrors(await fs.readFile(file, "utf8"), file));
+    }
+  }
+  await walk(directory);
+  if (errors.length) throw new Error(errors.join("\n"));
+}

src/bindings/cli.ts

@@ -0,0 +1,27 @@
+#!/usr/bin/env node
+import { readFile, writeFile } from "node:fs/promises";
+import { generateTypeScriptBindings } from "./index.js";
+import path from "node:path";
+import { reactPlatformTypes } from "./react-platform.js";
+import { generateReactBindings } from "./react.js";
+
+const main = async () => {
+  const [schema, revision, output, options, ...rest] = process.argv.slice(2);
+  if (!schema || !revision || !output || rest.length)
+    throw new Error("usage: quixos-codegen-ts SCHEMA.json PACKAGE_REVISION OUTPUT.ts [OPTIONS.json]");
+  const config = options ? JSON.parse(await readFile(options, "utf8")) : {};
+  const contracts = JSON.parse(await readFile(schema, "utf8"));
+  const generated = generateTypeScriptBindings(contracts, revision, config);
+  await writeFile(output, generated);
+  if (config.react) {
+    await writeFile(path.join(path.dirname(output), "web-studio-react-runtime.d.ts"), reactPlatformTypes);
+    await writeFile(
+      path.join(path.dirname(output), "react-props.gen.ts"),
+      generateReactBindings(contracts, revision, config.react.propsExports, config.react.components),
+    );
+  }
+};
+main().catch((error: unknown) => {
+  console.error(error instanceof Error ? error.message : error);
+  process.exitCode = 1;
+});

src/bindings/client.ts

@@ -0,0 +1,105 @@
+import type { InterfaceRevision, ValueType } from "../capability-model/types.js";
+
+/** Host clients have no package receiver, but must use the same checked
+ * interface signatures and argument framing as generated package ports. */
+export const generateClientContracts = (
+  interfaces: InterfaceRevision[],
+  messages: Record<string, string>,
+  qualified = false,
+) => {
+  if (interfaces.some((entry) => entry.template))
+    throw new Error("Host contracts require closed interface applications, not generic definitions");
+  const type = (value: ValueType): string => {
+    switch (value.kind) {
+      case "builtin":
+        return value.name === "unit" ? "undefined" : "string";
+      case "scalar":
+        return {
+          bool: "boolean",
+          string: "string",
+          bytes: "Uint8Array",
+          int32: "number",
+          uint32: "number",
+          double: "number",
+          int64: "bigint",
+          uint64: "bigint",
+        }[value.name];
+      case "object-ref":
+        return qualified
+          ? `CapabilityReference<${JSON.stringify(value.expectation.kind === "atom" ? `atom:${value.expectation.atomId}` : `interface:${value.expectation.interfaceRevisionId}`)}>`
+          : `{readonly $quixosRef: string}`;
+      case "optional":
+        return `(${type(value.value)} | null)`;
+      case "list":
+        return `Array<${type(value.value)}>`;
+      case "record":
+        return `{${Object.entries(value.fields)
+          .map(([name, field]) => `${JSON.stringify(name)}${field.kind === "optional" ? "?" : ""}: ${type(field)}`)
+          .join("; ")}}`;
+      case "message": {
+        const binding = messages[value.descriptorId];
+        if (!binding) throw new Error(`Missing host message type ${value.descriptorId}`);
+        return binding;
+      }
+    }
+  };
+  const operations = interfaces.flatMap((iface) =>
+    iface.members.flatMap((member) =>
+      member.operations
+        .filter((operation) => operation.mode === "call")
+        .map((operation) => ({ ...operation, interfaceRevisionId: iface.revisionId })),
+    ),
+  );
+  if (qualified) {
+    const contracts = interfaces.map((iface) => {
+      const members = iface.members.flatMap((member) =>
+        member.operations
+          .filter((op) => op.mode === "call")
+          .map((op) => `  ${JSON.stringify(op.id)}: {input: ${type(op.inputType)}; output: ${type(op.outputType)}};`),
+      );
+      return `${JSON.stringify(iface.revisionId)}: {\n${members.join("\n")}\n}`;
+    });
+    if (new Set(interfaces.map((iface) => iface.revisionId)).size !== interfaces.length)
+      throw new Error("Duplicate closed interface identity");
+    return (
+      `// Generated closed capability contracts. Dispatch by interface AND operation.\n` +
+      `declare const referenceType: unique symbol;\nexport type CapabilityReference<T extends string> = {readonly $quixosRef: string; readonly [referenceType]: T};\n` +
+      `export type CapabilityContracts = {${contracts.join(";\n")}};\n` +
+      `export type CapabilityInput<I extends keyof CapabilityContracts, O extends keyof CapabilityContracts[I]> = CapabilityContracts[I][O] extends {input: infer T} ? T : never;\n` +
+      `export type CapabilityOutput<I extends keyof CapabilityContracts, O extends keyof CapabilityContracts[I]> = CapabilityContracts[I][O] extends {output: infer T} ? T : never;\n` +
+      `export const capabilityApplications = ${JSON.stringify(Object.fromEntries(interfaces.map((iface) => [iface.revisionId, { definitionId: iface.application?.definitionId ?? iface.revisionId, arguments: iface.application?.arguments ?? [], ...(iface.application?.self ? { self: iface.application.self } : {}) }])))} as const;\n`
+    );
+  }
+  if (new Set(operations.map((entry) => entry.id)).size !== operations.length)
+    throw new Error(
+      "Host operation IDs are ambiguous across interfaces; select a closed interface application explicitly",
+    );
+  return (
+    `// Generated from checked QX interfaces. Regenerate with scripts/generate-platform-contracts.mjs.\n` +
+    `export type PlatformInputs = {\n${operations.map((operation) => `  ${JSON.stringify(operation.id)}: ${type(operation.inputType)};`).join("\n")}\n};\n` +
+    `export const platformOperations = ${JSON.stringify(
+      Object.fromEntries(
+        operations.map((operation) => [
+          operation.id,
+          {
+            interfaceRevisionId: operation.interfaceRevisionId,
+            input:
+              operation.inputType.kind === "builtin" && operation.inputType.name === "unit"
+                ? "unit"
+                : ["record", "message"].includes(operation.inputType.kind)
+                  ? "fields"
+                  : "value",
+          },
+        ]),
+      ),
+      null,
+      2,
+    )} as const;\n`
+  );
+};
+
+/** New consumers use exact closed interface identities; operation IDs alone are not unique. */
+export const generateAppliedClientContracts = (
+  interfaces: InterfaceRevision[],
+  messages: Record<string, string> = {},
+) => generateClientContracts(interfaces, messages, true);

src/bindings/generics.ts

@@ -0,0 +1,170 @@
+import type { GenericPackageExport, GenericDependencyPort } from "../capability-model/generic-packages.js";
+import type { InterfaceRevision, ValueType } from "../capability-model/types.js";
+import type {
+  ValueTypeExpression,
+  ObjectTypeExpression,
+  TypeArgumentExpression,
+  TypeParameter,
+  ValueAliasDefinition,
+} from "../capability-model/generics.js";
+
+/** Universal source contracts. Only closed exports get executable codecs. */
+export const genericImplementationType = (
+  definition: GenericPackageExport,
+  interfaces: InterfaceRevision[],
+  concrete: (type: ValueType) => string,
+): string => {
+  const names = new Map(definition.parameters.map((parameter, index) => [parameter.id, `T${index}`]));
+  type Scope = { arguments: Map<string, string>; aliases: ValueAliasDefinition[] };
+  const rootScope = (): Scope => ({ arguments: new Map(), aliases: definition.aliases });
+  const object = (entries: [string, string][]) =>
+    `{${entries.map(([key, value]) => `${JSON.stringify(key)}:${value}`).join(";")}}`;
+  const target = (type: ObjectTypeExpression, scope: Scope): string => {
+    if (type.kind === "parameter") {
+      const bound = scope.arguments.get(type.parameterId);
+      if (bound) return bound;
+      const name = names.get(type.parameterId);
+      if (!name) throw new Error(`Unbound object parameter ${type.parameterId}`);
+      return name;
+    }
+    if (type.kind === "atom") return JSON.stringify(`atom:${type.atomId}`);
+    if (type.kind === "interface") return JSON.stringify(`interface:${type.interfaceRevisionId}`);
+    if (type.kind === "application")
+      return `QxApplied<${JSON.stringify(type.application.definitionId)}, [${type.application.arguments.map((arg) => argument(arg, scope)).join(",")}]>`;
+    throw new Error("Generic package Self must be expressed as an explicit object parameter");
+  };
+  const argument = (arg: TypeArgumentExpression, scope: Scope): string =>
+    arg.kind === "value" ? value(arg.type, scope) : target(arg.target, scope);
+  const bind = (parameters: TypeParameter[], args: TypeArgumentExpression[], scope: Scope): Scope => {
+    if (parameters.length !== args.length) throw new Error("Wrong generic arity during code generation");
+    const result = new Map(scope.arguments);
+    // Render arguments in their original lexical scope before introducing binders.
+    const rendered = args.map((arg) => argument(arg, scope));
+    parameters.forEach((parameter, index) => result.set(parameter.id, rendered[index]));
+    return { ...scope, arguments: result };
+  };
+  const value = (type: ValueTypeExpression, scope: Scope, depth = 0): string => {
+    if (depth > 128) throw new Error("Generic type expansion exceeds depth limit");
+    switch (type.kind) {
+      case "parameter": {
+        const bound = scope.arguments.get(type.parameterId);
+        if (bound) return bound;
+        const name = names.get(type.parameterId);
+        if (!name) throw new Error(`Unbound value parameter ${type.parameterId}`);
+        return name;
+      }
+      case "object-ref":
+        return `QxObjectRef<${target(type.expectation, scope)}>`;
+      case "record":
+        return object(Object.entries(type.fields).map(([name, field]) => [name, value(field, scope, depth + 1)]));
+      case "optional":
+        return `(${value(type.value, scope, depth + 1)} | null)`;
+      case "list":
+        return `Array<${value(type.value, scope, depth + 1)}>`;
+      case "alias": {
+        const alias = scope.aliases.find((entry) => entry.id === type.definitionId);
+        if (!alias) throw new Error(`Missing alias ${type.definitionId}`);
+        return value(alias.body, bind(alias.parameters, type.arguments, scope), depth + 1);
+      }
+      default:
+        return concrete(type);
+    }
+  };
+  const params = (type: ValueTypeExpression, scope: Scope) =>
+    type.kind === "builtin" && type.name === "unit" ? "" : `input:${value(type, scope)}`;
+  const port = (entry: GenericDependencyPort): string => {
+    const requirement = entry.requirement,
+      scope = rootScope();
+    switch (requirement.kind) {
+      case "state":
+        return object([
+          ...requirement.primitives.map((primitive): [string, string] => {
+            if (primitive === "read") return ["get", `()=>Promise<${value(requirement.valueType, scope)}>`];
+            if (primitive === "write") return ["set", `(value:${value(requirement.valueType, scope)})=>Promise<void>`];
+            throw new Error(`Unsupported generic state primitive ${primitive}`);
+          }),
+          ...(requirement.primitives.includes("read")
+            ? [["live", "()=>Promise<QxLiveValue>"] as [string, string]]
+            : []),
+        ]);
+      case "edge": {
+        const ref = `QxObjectRef<${target(requirement.target, scope)}>`;
+        const methods = requirement.primitives.map((primitive): [string, string] => {
+          if (primitive === "resolve") return ["resolve", `()=>Promise<Array<${ref}>>`];
+          if (primitive === "connect" || primitive === "disconnect")
+            return [primitive, `(target:${ref})=>Promise<void>`];
+          throw new Error(`Unsupported generic edge primitive ${primitive}`);
+        });
+        if (requirement.primitives.includes("resolve"))
+          methods.push(["collection", `()=>Promise<RelationshipCollection<${ref}>>`]);
+        if (
+          ["resolve", "connect", "disconnect"].every((primitive) =>
+            requirement.primitives.includes(primitive as "resolve"),
+          )
+        )
+          methods.push([
+            "replace",
+            `(entries:RelationshipEntry<${ref}>[],expectedRevision:bigint)=>Promise<RelationshipCollection<${ref}>>`,
+          ]);
+        return object(methods);
+      }
+      case "constructor":
+        return object([
+          [
+            "construct",
+            `(${params(requirement.inputType, scope)})=>Promise<QxObjectRef<${target(requirement.target, scope)}>>`,
+          ],
+        ]);
+      case "interface": {
+        const contract = interfaces.find((entry) => entry.revisionId === requirement.application.definitionId);
+        if (!contract) throw new Error(`Missing generic port contract ${requirement.application.definitionId}`);
+        const local = {
+          ...bind(contract.template?.parameters ?? [], requirement.application.arguments, scope),
+          aliases: contract.template?.aliases ?? [],
+        };
+        const operations = (contract.template?.members ?? contract.members).flatMap((member) =>
+          member.operations
+            .filter((op) => op.mode === "call" && op.scope !== "class")
+            .map((op) => ({ ...op, name: `${member.displayName}.${op.displayName}` })),
+        );
+        return object([
+          ["objectId", `QxObjectRef<${target({ kind: "application", application: requirement.application }, scope)}>`],
+          ["live", object(operations.map((op) => [op.name, `(${params(op.inputType, local)})=>Promise<QxLiveValue>`]))],
+          ...operations.map(
+            (op) =>
+              [op.name, `(${params(op.inputType, local)})=>Promise<${value(op.outputType, local)}>`] as [
+                string,
+                string,
+              ],
+          ),
+        ]);
+      }
+    }
+  };
+  const declarations = definition.parameters
+    .map((parameter) => `${names.get(parameter.id)}${parameter.kind === "object" ? " extends string" : ""}`)
+    .join(",");
+  const receiver = definition.receiverRequirement;
+  const context = object([
+    ...(definition.kind === "function"
+      ? []
+      : [
+          [
+            "objectId",
+            `QxObjectRef<${receiver.kind === "target" ? target(receiver.target, rootScope()) : "string"}>`,
+          ] as [string, string],
+        ]),
+    ["input", value(definition.inputType, rootScope())],
+    ["ports", object(definition.dependencyPorts.map((entry) => [entry.displayName, port(entry)]))],
+  ]);
+  const contextWithLifecycle =
+    definition.kind === "function"
+      ? `${context} & {signal?: AbortSignal}`
+      : `${context} & QxContextLifecycle<${context} & {signal?: AbortSignal}>`;
+  const result = value(definition.eventType ?? definition.outputType, rootScope());
+  const handler = `<${declarations}>(context:${contextWithLifecycle})=>${result}|Promise<${result}>`;
+  const derived = `{kind:"derived";get:${handler}}`;
+  return definition.eventType
+    ? derived
+    : `(${handler})${definition.kind === "operation" && definition.mode === "call" ? ` | ${derived}` : ""}`;
+};

src/bindings/index.ts

@@ -0,0 +1,320 @@
+import type {
+  InterfaceRevision,
+  PackageRevision,
+  ValueType,
+  DependencyPort,
+  WorkspaceRevision,
+} from "../capability-model/types.js";
+import type { CompiledCapabilityResourceRepository } from "../capability-language/assembly.js";
+import { genericImplementationType } from "./generics.js";
+
+/** Portable generator input. New backends consume this instead of the parser or TS runtime. */
+export type BindingSchema = {
+  format: "quixos-bindings";
+  version: 1;
+  interfaces: InterfaceRevision[];
+  interfaceTemplates?: InterfaceRevision[];
+  packages: PackageRevision[];
+};
+export const bindingSchema = (compiled: Pick<CompiledCapabilityResourceRepository, "resources">): BindingSchema => ({
+  format: "quixos-bindings",
+  version: 1,
+  interfaceTemplates: compiled.resources.flatMap((node) =>
+    node.resource.kind === "interface" && node.resource.revision.template ? [node.resource.revision] : [],
+  ),
+  interfaces: [
+    ...new Map(
+      compiled.resources
+        .flatMap((node) => [
+          ...(node.resource.kind === "interface" ? [node.resource.revision] : []),
+          ...(node.resource.specializations ?? []),
+        ])
+        .filter((entry) => !entry.template)
+        .map((entry) => [entry.revisionId, entry]),
+    ).values(),
+  ],
+  packages: compiled.resources.flatMap((node) => (node.resource.kind === "package" ? [node.resource.revision] : [])),
+});
+
+export const specializeBindingSchema = (
+  base: BindingSchema,
+  workspace: WorkspaceRevision,
+  revisionId: string,
+): BindingSchema => {
+  const pkg = workspace.packageImports.find((entry) => entry.revisionId === revisionId);
+  if (!pkg) throw new Error(`Missing candidate package ${revisionId}`);
+  const needed = new Set<string>();
+  const visit = (value: unknown): void => {
+    if (!value || typeof value !== "object") return;
+    if ("interfaceRevisionId" in value && typeof value.interfaceRevisionId === "string")
+      needed.add(value.interfaceRevisionId);
+    Object.values(value).forEach(visit);
+  };
+  visit(pkg.exports);
+  const interfaces = new Map<string, InterfaceRevision>(base.interfaces.map((entry) => [entry.revisionId, entry]));
+  for (const id of needed) {
+    const iface = workspace.interfaceImports.find((entry) => entry.revisionId === id);
+    if (iface) {
+      interfaces.set(id, iface);
+      visit(iface.members);
+    }
+  }
+  return {
+    ...base,
+    interfaces: [...interfaces.values()],
+    packages: base.packages.map((entry) => {
+      const candidate = workspace.packageImports.find((value) => value.revisionId === entry.revisionId);
+      if (!candidate) throw new Error(`Missing dependency package ${entry.revisionId}`);
+      return candidate;
+    }),
+  };
+};
+export type TypeScriptBindingOptions = {
+  runtimeModule?: string;
+  /** Each export must implement MessageBinding<T>, providing both TS type and wire codec. */
+  messages?: Record<string, { module: string; export: string }>;
+};
+export function generatePackageDescriptor(schema: BindingSchema, revisionId: string): string {
+  const pkg = schema.packages.find((entry) => entry.revisionId === revisionId);
+  if (!pkg) throw new Error(`Unknown package revision ${revisionId}`);
+  return (
+    `# Generated from the checked package contract\npackage_id: ${JSON.stringify(pkg.packageId)}\npackage_revision_id: ${JSON.stringify(pkg.revisionId)}\nruntime_protocol_version: "quixos-capabilities-v1"\n` +
+    pkg.exports
+      .map(
+        (entry) =>
+          `exports: { export_id: ${JSON.stringify(entry.id)} runtime_symbol: ${JSON.stringify(entry.displayName)} }\n`,
+      )
+      .join("")
+  );
+}
+const q = JSON.stringify;
+const object = (entries: [string, string][]) =>
+  `{ ${entries.map(([key, value]) => `${q(key)}: ${value}`).join("; ")} }`;
+const unit = (type: ValueType) => type.kind === "builtin" && type.name === "unit";
+
+export const generateTypeScriptBindings = (
+  schema: BindingSchema,
+  packageRevisionId: string,
+  options: TypeScriptBindingOptions = {},
+) => {
+  if (schema.format !== "quixos-bindings" || schema.version !== 1)
+    throw new Error("Unsupported binding schema version");
+  if (schema.interfaces.some((entry) => entry.template))
+    throw new Error("Package bindings require closed interface applications, not generic definitions");
+  const pkg = schema.packages.find((entry) => entry.revisionId === packageRevisionId);
+  if (!pkg) throw new Error(`Unknown package revision ${packageRevisionId}`);
+  const messages = new Map<string, string>();
+  const type = (value: ValueType): string => {
+    switch (value.kind) {
+      case "builtin":
+        return value.name === "unit" ? "null" : "QxWatchHandle";
+      case "scalar":
+        return {
+          bool: "boolean",
+          bytes: "Uint8Array",
+          string: "string",
+          int64: "bigint",
+          uint64: "bigint",
+          double: "number",
+          int32: "number",
+          uint32: "number",
+        }[value.name];
+      case "object-ref":
+        return `QxObjectRef<${q(value.expectation.kind === "atom" ? `atom:${value.expectation.atomId}` : `interface:${value.expectation.interfaceRevisionId}`)}>`;
+      case "optional":
+        return `(${type(value.value)} | null)`;
+      case "list":
+        return `Array<${type(value.value)}>`;
+      case "record":
+        return `{ ${Object.entries(value.fields)
+          .map(([name, field]) => `${q(name)}: ${type(field)}`)
+          .join("; ")} }`;
+      case "message": {
+        if (!options.messages?.[value.descriptorId])
+          throw new Error(`Missing TypeScript message binding for ${value.descriptorId}`);
+        if (!messages.has(value.descriptorId)) messages.set(value.descriptorId, `message${messages.size}`);
+        return `BindingValue<typeof ${messages.get(value.descriptorId)}>`;
+      }
+    }
+  };
+  const ref = (target: { kind: "atom"; atomId: string } | { kind: "interface"; interfaceRevisionId: string }) =>
+    `QxObjectRef<${q(target.kind === "atom" ? `atom:${target.atomId}` : `interface:${target.interfaceRevisionId}`)}>`;
+  const params = (input: ValueType) => (unit(input) ? "" : `input: ${type(input)}`);
+  const port = (entry: DependencyPort): { type: string; spec: unknown } => {
+    const requirement = entry.requirement;
+    switch (requirement.kind) {
+      case "state": {
+        const methods = requirement.primitives.map((primitive): [string, string] => {
+          if (primitive === "read") return ["get", `() => Promise<${type(requirement.valueType)}>`];
+          if (primitive === "write") return ["set", `(value: ${type(requirement.valueType)}) => Promise<void>`];
+          throw new Error(`State primitive ${primitive} is not supported by the TypeScript runtime binding yet`);
+        });
+        if (requirement.primitives.includes("read")) methods.push(["live", "() => Promise<QxLiveValue>"]);
+        return { type: object(methods), spec: { ...requirement, id: entry.id } };
+      }
+      case "edge": {
+        const methods = requirement.primitives.map((primitive): [string, string] => {
+          if (primitive === "resolve") return [primitive, `() => Promise<Array<${ref(requirement.target)}>>`];
+          if (primitive === "connect" || primitive === "disconnect")
+            return [primitive, `(target: ${ref(requirement.target)}) => Promise<void>`];
+          throw new Error(`Edge primitive ${primitive} is not supported by the TypeScript runtime binding yet`);
+        });
+        if (requirement.primitives.includes("resolve"))
+          methods.push(["collection", `() => Promise<RelationshipCollection<${ref(requirement.target)}>>`]);
+        if (
+          ["resolve", "connect", "disconnect"].every((primitive) =>
+            requirement.primitives.includes(primitive as "resolve"),
+          )
+        )
+          methods.push([
+            "replace",
+            `(entries: RelationshipEntry<${ref(requirement.target)}>[], expectedRevision: bigint) => Promise<RelationshipCollection<${ref(requirement.target)}>>`,
+          ]);
+        return { type: object(methods), spec: { kind: "edge", id: entry.id, primitives: requirement.primitives } };
+      }
+      case "interface": {
+        const contract = schema.interfaces.find(
+          (candidate) => candidate.revisionId === requirement.interfaceRevisionId,
+        );
+        if (!contract) throw new Error(`Missing imported interface contract ${requirement.interfaceRevisionId}`);
+        // Streaming ports need a future streaming ABI; ordinary calls are fully typed today.
+        const operations = contract.members.flatMap((member) =>
+          member.operations
+            .filter((operation) => operation.mode === "call" && operation.scope !== "class")
+            .map((operation) => ({ ...operation, name: `${member.displayName}.${operation.displayName}` })),
+        );
+        return {
+          type: object([
+            ["objectId", ref({ kind: "interface", interfaceRevisionId: requirement.interfaceRevisionId })],
+            [
+              "live",
+              object(
+                operations.map((operation) => [
+                  operation.name,
+                  `(${params(operation.inputType)}) => Promise<QxLiveValue>`,
+                ]),
+              ),
+            ],
+            ...operations.map((operation): [string, string] => [
+              operation.name,
+              `(${params(operation.inputType)}) => Promise<${type(operation.outputType)}>`,
+            ]),
+          ]),
+          spec: {
+            kind: "interface",
+            id: entry.id,
+            operations: Object.fromEntries(
+              operations.map(({ name, id, inputType, outputType }) => [name, { id, inputType, outputType }]),
+            ),
+          },
+        };
+      }
+      case "constructor": {
+        const input = requirement.inputType;
+        if (!input)
+          throw new Error(
+            `Constructor port ${entry.id} needs an explicit input contract: add 'input TYPE' after ${requirement.atomId} in QX`,
+          );
+        return {
+          type: object([
+            ["construct", `(${params(input)}) => Promise<${ref({ kind: "atom", atomId: requirement.atomId })}>`],
+          ]),
+          spec: { kind: "constructor", id: entry.id, inputType: input },
+        };
+      }
+    }
+  };
+  const exports = [...pkg.exports].sort((a, b) => (a.id < b.id ? -1 : a.id > b.id ? 1 : 0));
+  const names = new Set<string>();
+  const specs: Record<string, unknown> = {};
+  const contexts: [string, string][] = [];
+  const handlers: [string, string][] = [];
+  const results: [string, string][] = [];
+  for (const entry of exports) {
+    if (names.has(entry.displayName)) throw new Error(`Duplicate export name ${entry.displayName}`);
+    names.add(entry.displayName);
+    const ports = entry.dependencyPorts.map((dependency) => ({ name: dependency.displayName, ...port(dependency) }));
+    if (new Set(ports.map((p) => p.name)).size !== ports.length)
+      throw new Error(`Duplicate dependency name in ${entry.displayName}`);
+    const receiver =
+      entry.kind === "constructor"
+        ? ref({ kind: "atom", atomId: entry.constructsAtom })
+        : entry.kind === "operation" && entry.receiverRequirement.kind === "exact-atom"
+          ? ref({ kind: "atom", atomId: entry.receiverRequirement.atomId })
+          : entry.kind === "operation" && entry.receiverRequirement.kind === "all-interfaces"
+            ? `QxObjectRef<${entry.receiverRequirement.interfaceRevisionIds.map((id) => q(`interface:${id}`)).join(" | ") || "never"}>`
+            : "QxObjectRef<string>";
+    const contextShape = object([
+      ...(entry.kind === "function" ? [] : [["objectId", receiver] as [string, string]]),
+      ["input", type(entry.inputType)],
+      ["ports", object(ports.map((port) => [port.name, port.type]))],
+    ]);
+    contexts.push([
+      entry.displayName,
+      entry.kind === "function"
+        ? `${contextShape} & {signal?: AbortSignal}`
+        : `${contextShape} & QxContextLifecycle<${contextShape} & {signal?: AbortSignal}>`,
+    ]);
+    const event = entry.kind === "operation" ? entry.eventType : undefined;
+    const contextType = `Contexts[${q(entry.displayName)}]`;
+    const outputType = type(event ?? entry.outputType);
+    results.push([entry.displayName, outputType]);
+    // Watch-start handlers produce events through the runtime's derived stream protocol.
+    if (!entry.application)
+      handlers.push([
+        entry.displayName,
+        event
+          ? `QxDerived<${contextType}, ${outputType}>`
+          : `QxHandler<${contextType}, ${outputType}>${entry.kind === "operation" && entry.mode === "call" ? ` | QxDerived<${contextType}, ${outputType}>` : ""}`,
+      ]);
+    specs[entry.displayName] = {
+      ...(entry.kind === "function" ? { receiver: "none" } : {}),
+      inputType: entry.inputType,
+      outputType: entry.outputType,
+      ...(event ? { eventType: event } : {}),
+      ports: Object.fromEntries(ports.map((port) => [port.name, port.spec])),
+    };
+  }
+  for (const definition of pkg.genericExports ?? []) {
+    handlers.push([
+      definition.displayName,
+      genericImplementationType(definition, [...schema.interfaces, ...(schema.interfaceTemplates ?? [])], type),
+    ]);
+  }
+  const imports = [...messages].map(([id, alias]) => {
+    const binding = options.messages![id]!;
+    if (!/^[A-Za-z_$][A-Za-z0-9_$]*$/.test(binding.export))
+      throw new Error(`Invalid message binding export ${binding.export}`);
+    return `import { ${binding.export} as ${alias} } from ${q(binding.module)};`;
+  });
+  const signatures = `${object(contexts)} ${object(handlers)} ${object(results)}`;
+  const typeImports = [
+    "BindingValue",
+    "QxObjectRef",
+    "QxWatchHandle",
+    "QxHandler",
+    "QxDerived",
+    "QxContextLifecycle",
+    "QxLiveValue",
+    "RelationshipCollection",
+    "RelationshipEntry",
+  ].filter((name) => new RegExp(`\\b${name}\\b`).test(signatures));
+  return (
+    `// Generated by quixos-codegen-ts. Do not edit. Binding ABI version 1.\n` +
+    `import { ${exports.length ? "bindQxHandler, " : ""}${[...typeImports, "QxHandlerSpec", "QxMessages"].map((name) => `type ${name}`).join(", ")} } from ${q(options.runtimeModule ?? "@quixos/camino-package-runtime")};\n` +
+    imports.join("\n") +
+    `\nexport const packageRevisionId = ${q(pkg.revisionId)};\n` +
+    `declare const appliedType: unique symbol;\ntype QxApplied<Definition extends string, Arguments extends readonly unknown[]> = string & {readonly [appliedType]: (value: [Definition, Arguments]) => [Definition, Arguments]};\n` +
+    `export type Contexts = ${object(contexts)};\nexport type Results = ${object(results)};\nexport type Implementation = ${object(handlers)};\n` +
+    `const messages = { ${[...messages].map(([id, alias]) => `${q(id)}: ${alias}`).join(", ")} } satisfies QxMessages;\n` +
+    `const specs = ${JSON.stringify(specs, null, 2)} satisfies Record<string, QxHandlerSpec>;\n` +
+    `export const createRuntime = (implementation: Implementation) => ({\n  packageRevisionId,\n  exports: {\n` +
+    exports
+      .map(
+        (entry) =>
+          `    ${q(entry.id)}: bindQxHandler(specs[${q(entry.displayName)}], implementation[${q(entry.application ? pkg.genericExports!.find((definition) => definition.id === entry.application!.exportId)!.displayName : entry.displayName)}], messages),`,
+      )
+      .join("\n") +
+    `\n  },\n});\n`
+  );
+};

src/bindings/react-platform.ts

@@ -0,0 +1,48 @@
+/** One authoring contract, distributed by scaffolding and immutable codegen.
+ * Web Studio checks its concrete exports against this contract during its build. */
+export const reactPlatformTypes = `// Generated by the Quixos React platform contract. Do not edit.
+declare module "@quixos/web-studio-react-runtime" {
+  import type * as React from "react";
+  export function useComponentOverlayContainer(): HTMLElement;
+  export function useComponentStyleRoot(): ShadowRoot;
+  export type ObjectRef<AtomId extends string> = string & {
+    readonly $quixosAtom: AtomId;
+  };
+  export type FieldCapability = {objectId: string; interfaceRevisionId: string; getOperationId: string; watchOperationId?: string; setOperationId?: string; inputKind?: "fields" | "value"};
+  export type ReadableField<T> = {readonly value?: T; readonly capability: FieldCapability};
+  /** set(T) uses the resolved capability: native CRDT fields send incremental edits;
+   * custom/manual setters receive semantic values. Storage provenance grants no authority. */
+  export type WritableField<T> = ReadableField<T> & {readonly $writeType?: (value: T) => T; readonly writable: true; readonly capability: FieldCapability & {setOperationId: string}};
+  export type LiveFieldProp<T> = ReadableField<T>;
+  export type InterfaceReference<I extends string, Fields> = {readonly $quixosRef: string; readonly interfaceRevisionId: I; readonly fields: Fields};
+  export type ReactComponentHostProps<Action> = {
+    onAction?: (action: Action) => void;
+    fallback?: React.ReactNode;
+    className?: string;
+    style?: React.CSSProperties;
+    /** Optional extra action. The host still displays and reports errors by default. */
+    extraErrorAction?: (error: Error) => void;
+  };
+  export type ReactComponentImplementationProps<CaminoProps, RenderProps, Action> = {
+    camino: CaminoProps;
+    render: RenderProps;
+    dispatch: (action: Action) => void;
+  };
+  export const createWebStudioComponent: <
+    ForObject extends ObjectRef<string>, RenderProps extends object, Action,
+  >(config: { expectedAtomId: string }) => (props: {
+    forObject: ForObject;
+  } & RenderProps & ReactComponentHostProps<Action>) => any;
+  export const invokeCapability: <Result = unknown>(
+    objectId: string,
+    interfaceRevisionId: string,
+    operationId: string,
+    value?: unknown,
+    options?: {clientMutationId?: string; signal?: AbortSignal},
+  ) => Promise<Result>;
+  export const h: typeof React.createElement;
+  export function useLiveField<T>(field: ReadableField<T>, options: {write: (value: T) => Promise<void>}): readonly [T, (value: T) => Promise<void>];
+  export function useLiveField<T>(field: WritableField<T>): readonly [T, (value: T) => Promise<void>];
+  export function useLiveField<T>(field: ReadableField<T>): readonly [T];
+}
+`;

src/bindings/react.ts

@@ -0,0 +1,87 @@
+import type { BindingSchema } from "./index.js";
+import type { ValueType } from "../capability-model/types.js";
+
+/** Browser projection of the SAME checked RPC types, not a second props schema. */
+export function generateReactBindings(
+  schema: BindingSchema,
+  packageRevisionId: string,
+  propsExports: readonly string[],
+  components: readonly { module: string; propsExport: string }[] = [],
+) {
+  const pkg = schema.packages.find((entry) => entry.revisionId === packageRevisionId);
+  if (!pkg) throw new Error(`Unknown package ${packageRevisionId}`);
+  const q = JSON.stringify;
+  const references = new Map<string, string>();
+  const declarations: string[] = [];
+  const type = (value: ValueType): string => {
+    switch (value.kind) {
+      case "builtin":
+        if (value.name !== "unit") throw new Error(`Unsupported React props builtin ${value.name}`);
+        return "null";
+      case "scalar":
+        return {
+          string: "string",
+          bool: "boolean",
+          bytes: "Uint8Array",
+          int64: "bigint",
+          uint64: "bigint",
+          int32: "number",
+          uint32: "number",
+          double: "number",
+        }[value.name];
+      case "optional":
+        return `(${type(value.value)} | null)`;
+      case "list":
+        return `Array<${type(value.value)}>`;
+      case "record":
+        return `{${Object.entries(value.fields)
+          .map(([name, field]) => `${q(name)}: ${type(field)}`)
+          .join(";")}}`;
+      case "message":
+        throw new Error(`React props require checked values, not opaque message ${value.descriptorId}`);
+      case "object-ref": {
+        if (value.expectation.kind === "atom") return `ObjectRef<${q(value.expectation.atomId)}>`;
+        const id = value.expectation.interfaceRevisionId;
+        const existing = references.get(id);
+        if (existing) return existing;
+        const name = `Interface${references.size}`;
+        references.set(id, name);
+        const iface = schema.interfaces.find((entry) => entry.revisionId === id);
+        if (!iface) throw new Error(`Missing React reference contract ${id}`);
+        const fields = iface.members.flatMap((member) => {
+          if (member.kind === "operation") return [];
+          const get = member.operations.find((op) => op.displayName === (member.kind === "value" ? "get" : "resolve"));
+          if (!get) return [];
+          const writable = member.kind === "value" && member.operations.some((op) => op.displayName === "set");
+          return [`${q(member.displayName)}: ${writable ? "WritableField" : "ReadableField"}<${type(get.outputType)}>`];
+        });
+        declarations.push(`export type ${name} = InterfaceReference<${q(id)}, {${fields.join(";")}}> ;`);
+        return name;
+      }
+    }
+  };
+  // Only exports explicitly selected as props are projected. Non-props exports
+  // may legitimately use opaque messages or types unrelated to the browser.
+  const selected = propsExports.map((name) => {
+    const entry = pkg.exports.find((candidate) => candidate.displayName === name);
+    if (!entry) throw new Error(`Unknown React props export ${name}`);
+    return entry;
+  });
+  const results = selected.map(
+    (entry) =>
+      `${q(entry.displayName)}: ${type(entry.kind === "operation" ? (entry.eventType ?? entry.outputType) : entry.outputType)}`,
+  );
+  const checks = components.map((component, i) => {
+    if (!propsExports.includes(component.propsExport))
+      throw new Error(`Component refers to unselected props export ${component.propsExport}`);
+    if (!component.module.startsWith("."))
+      throw new Error("React component check must name a local module relative to generated bindings");
+    return `type Component${i} = CheckedComponent<${q(component.propsExport)}, typeof import(${q(component.module)})["default"]>;`;
+  });
+  return (
+    `// Generated from checked QX contracts. Do not edit.\nimport type {ObjectRef, InterfaceReference, ReadableField, WritableField} from "@quixos/web-studio-react-runtime";\n${declarations.join("\n")}\nexport type ReactResults = {${results.join(";\n")}};\n` +
+    (checks.length
+      ? `type CheckedComponent<K extends keyof ReactResults, C extends (props: {camino: ReactResults[K]; render: any; dispatch: (action: any) => void}) => unknown> = C;\n${checks.join("\n")}\n`
+      : "")
+  );
+}

src/capability-language/assembly.ts

@@ -1,8 +1,11 @@
-import { readFile } from "node:fs/promises";
+import { readFile, realpath } from "node:fs/promises";
 import path from "node:path";
+import { loadQxSources, resolveQxSources } from "./source-loader.js";
 import {
   capabilityId,
   compileWorkspaceRevision,
+  validateMigrationCatalog,
+  contentDigest,
   type AtomDefinition,
   type CompiledWorkspaceRevision,
   type InterfaceRevision,
@@ -61,11 +64,9 @@ export type CompiledCapabilityResourceRepository = {
 const sourceKey = (kind: LockedResource["kind"], source: GitSource) =>
   `${kind}\0${source.repository}\0${source.commit.toLowerCase()}`;
 
-const bindingKey = (kind: LockedResource["kind"], binding: string) =>
+const bindingKey = (kind: LockedResource["kind"], binding: string) => `${kind}\0${binding}`;
-  `${kind}\0${binding}`;
 
-const importsKey = (entry: CapabilityResourceImport | LockedResource) =>
+const importsKey = (entry: CapabilityResourceImport | LockedResource) => bindingKey(entry.kind, entry.binding);
-  bindingKey(entry.kind, entry.binding);
 
 const assertImportsMatchLock = (
   label: string,
@@ -74,22 +75,23 @@ const assertImportsMatchLock = (
 ) => {
   const authored = [...imports].map(importsKey).sort();
   const locked = [...resources].map(importsKey).sort();
-  if (
+  if (authored.length !== locked.length || authored.some((entry, index) => entry !== locked[index])) {
-    authored.length !== locked.length ||
-    authored.some((entry, index) => entry !== locked[index])
-  ) {
     throw new Error(
       `${label} imports do not match quixos.lock:\n` +
-      `authored: ${authored.join(", ") || "none"}\n` +
+        `authored: ${authored.join(", ") || "none"}\n` +
-      `locked: ${locked.join(", ") || "none"}`,
+        `locked: ${locked.join(", ") || "none"}`,
     );
   }
 };
 
-const exactRevisions = <Revision extends {
+const exactRevisions = <
-  revisionId: string;
+  Revision extends {
-  source: SourceRevision;
+    revisionId: string;
-}>(revisions: readonly Revision[]) => {
+    source: SourceRevision;
+  },
+>(
+  revisions: readonly Revision[],
+) => {
   const seen = new Set<string>();
   return revisions.filter((revision) => {
     const key = `${revision.revisionId}\0${revision.source.repository}\0${revision.source.commit}`;
@@ -119,19 +121,20 @@ const diagnosticsMessage = (
     message: string;
     path?: string;
   }[],
-) => `${label} did not compile:\n${diagnostics.map((entry) => {
+) =>
-  const location = entry.line > 0
+  `${label} did not compile:\n${diagnostics
-    ? `${entry.fileName}:${entry.line}:${entry.column + 1}`
+    .map((entry) => {
-    : `${entry.fileName}${entry.path ? `:${entry.path}` : ""}`;
+      const location =
-  return `${location}: ${entry.phase} ${entry.code}: ${entry.message}`;
+        entry.line > 0
-}).join("\n")}`;
+          ? `${entry.fileName}:${entry.line}:${entry.column + 1}`
+          : `${entry.fileName}${entry.path ? `:${entry.path}` : ""}`;
+      return `${location}: ${entry.phase} ${entry.code}: ${entry.message}`;
+    })
+    .join("\n")}`;
 
-const revisionFor = (node: ResolvedCapabilityResource) =>
+const revisionFor = (node: ResolvedCapabilityResource) => node.resource.revision;
-  node.resource.revision;
 
-const resourceClosure = (
+const resourceClosure = (roots: readonly ResolvedCapabilityResource[]): ResolvedCapabilityResource[] => {
-  roots: readonly ResolvedCapabilityResource[],
-): ResolvedCapabilityResource[] => {
   const result: ResolvedCapabilityResource[] = [];
   const seen = new Set<string>();
   const visit = (node: ResolvedCapabilityResource) => {
@@ -148,25 +151,29 @@ const environmentFor = (
   direct: readonly [LockedResource, ResolvedCapabilityResource][],
   closure: readonly ResolvedCapabilityResource[],
 ): CapabilityImportEnvironment => ({
-  interfaces: new Map(direct.flatMap(([locked, node]) =>
+  interfaces: new Map(
-    node.resource.kind === "interface"
+    direct.flatMap(([locked, node]) =>
-      ? [[locked.binding, node.resource.revision] as const]
+      node.resource.kind === "interface" ? [[locked.binding, node.resource.revision] as const] : [],
-      : [])),
+    ),
-  packages: new Map(direct.flatMap(([locked, node]) =>
+  ),
-    node.resource.kind === "package"
+  packages: new Map(
-      ? [[locked.binding, node.resource.revision] as const]
+    direct.flatMap(([locked, node]) =>
-      : [])),
+      node.resource.kind === "package" ? [[locked.binding, node.resource.revision] as const] : [],
-  interfaceClosure: exactRevisions(closure.flatMap((node) =>
+    ),
-    node.resource.kind === "interface" ? [node.resource.revision] : [])),
+  ),
-  packageClosure: exactRevisions(closure.flatMap((node) =>
+  interfaceClosure: exactRevisions(
-    node.resource.kind === "package" ? [node.resource.revision] : [])),
+    closure.flatMap((node) => [
+      ...(node.resource.kind === "interface" ? [node.resource.revision] : []),
+      ...(node.resource.specializations ?? []),
+    ]),
+  ),
+  packageClosure: exactRevisions(
+    closure.flatMap((node) => (node.resource.kind === "package" ? [node.resource.revision] : [])),
+  ),
   externalAtoms: exactAtoms(closure.flatMap((node) => node.resource.externalAtoms)),
 });
 
-const createResourceGraphResolver = (
+const createResourceGraphResolver = (quixosCommit: string, resolveResource: CapabilityRepositoryResolver) => {
-  quixosCommit: string,
-  resolveResource: CapabilityRepositoryResolver,
-) => {
   const resolved = new Map<string, Promise<ResolvedCapabilityResource>>();
   const active: string[] = [];
 
@@ -185,7 +192,7 @@ const createResourceGraphResolver = (
     const pending = (async () => {
       active.push(key);
       try {
-        const snapshot = suppliedSnapshot ?? await resolveResource(locked.source, locked.kind);
+        const snapshot = suppliedSnapshot ?? (await resolveResource(locked.source, locked.kind));
         const lockResult = await loadQuixosLock(path.join(snapshot.directory, "quixos.lock"));
         if (!lockResult.ok) {
           throw new Error(diagnosticsMessage(`${locked.kind} ${locked.binding} lock`, lockResult.diagnostics));
@@ -193,22 +200,20 @@ const createResourceGraphResolver = (
         if (lockResult.lock.quixos.policy) {
           throw new Error(
             `${locked.kind} ${locked.binding} lock declares workspace Quixos policy ` +
-            `${lockResult.lock.quixos.policy}; resource locks may only declare their exact authored-against commit`,
+              `${lockResult.lock.quixos.policy}; resource locks may only declare their exact authored-against commit`,
           );
         }
         if (lockResult.lock.quixos.commit.toLowerCase() !== quixosCommit.toLowerCase()) {
           throw new Error(
             `${locked.kind} ${locked.binding} selects Quixos ${lockResult.lock.quixos.commit}, ` +
-            `but the repository graph selects ${quixosCommit}`,
+              `but the repository graph selects ${quixosCommit}`,
           );
         }
         const directPairs: Array<[LockedResource, ResolvedCapabilityResource]> = [];
         for (const dependency of lockResult.lock.resources) {
           directPairs.push([dependency, await visit(dependency)]);
         }
-        const dependencyClosure = resourceClosure(
+        const dependencyClosure = resourceClosure(directPairs.map(([, node]) => node));
-          directPairs.map(([, node]) => node),
-        );
         const environment = environmentFor(directPairs, dependencyClosure);
         const manifestName = locked.kind === "interface" ? "interface.qx" : "package.qx";
         const manifestPath = path.join(snapshot.directory, manifestName);
@@ -222,11 +227,32 @@ const createResourceGraphResolver = (
           throw new Error(diagnosticsMessage(`${locked.kind} ${locked.binding}`, compiled.diagnostics));
         }
         if (compiled.resource.kind !== locked.kind) {
-          throw new Error(
+          throw new Error(`${manifestPath} declares ${compiled.resource.kind}, not ${locked.kind}`);
-            `${manifestPath} declares ${compiled.resource.kind}, not ${locked.kind}`,
-          );
         }
         assertImportsMatchLock(manifestPath, compiled.resource.imports, lockResult.lock.resources);
+        if (compiled.resource.kind === "package") {
+          let catalogText: string | undefined;
+          try {
+            catalogText = await readFile(path.join(snapshot.directory, "quixos.migrations.json"), "utf8");
+          } catch (error) {
+            if ((error as NodeJS.ErrnoException).code !== "ENOENT") throw error;
+          }
+          if (catalogText !== undefined) {
+            const catalog = validateMigrationCatalog(
+              JSON.parse(catalogText),
+              new Set(compiled.resource.revision.exports.map((entry) => entry.id)),
+            );
+            const root = await realpath(snapshot.directory);
+            for (const migration of catalog.migrations) {
+              const implementation = await realpath(path.join(root, migration.implementation.file));
+              if (!implementation.startsWith(`${root}${path.sep}`))
+                throw new Error("Migration implementation escapes its package");
+              if (contentDigest(await readFile(implementation, "utf8")) !== migration.implementation.digest)
+                throw new Error(`Migration implementation digest mismatch: ${migration.id}`);
+            }
+            compiled.resource.revision.migrationCatalog = catalog;
+          }
+        }
         return {
           key,
           kind: locked.kind,
@@ -234,10 +260,9 @@ const createResourceGraphResolver = (
           directory: snapshot.directory,
           lock: lockResult.lock,
           resource: compiled.resource,
-          dependencies: new Map(directPairs.map(([dependency, node]) => [
+          dependencies: new Map(
-            bindingKey(dependency.kind, dependency.binding),
+            directPairs.map(([dependency, node]) => [bindingKey(dependency.kind, dependency.binding), node]),
-            node,
+          ),
-          ])),
         };
       } finally {
         active.pop();
@@ -263,15 +288,15 @@ export const compileCapabilityResourceRepository = async (options: {
   if (!lockResult.ok) {
     throw new Error(diagnosticsMessage("Resource lock", lockResult.diagnostics));
   }
-  const resolver = createResourceGraphResolver(
+  const resolver = createResourceGraphResolver(lockResult.lock.quixos.commit, options.resolveResource);
-    lockResult.lock.quixos.commit,
+  const root = await resolver.visit(
-    options.resolveResource,
+    {
+      kind: options.kind,
+      binding: "<root>",
+      source: options.source,
+    },
+    { directory: options.rootDirectory },
   );
-  const root = await resolver.visit({
-    kind: options.kind,
-    binding: "<root>",
-    source: options.source,
-  }, { directory: options.rootDirectory });
   return {
     resource: root.resource,
     lock: root.lock,
@@ -286,10 +311,10 @@ export const compileWorkspaceRepository = async (options: {
   workspaceId?: string;
   workspaceRevisionId?: string;
   sourceRootCommit?: string;
+  /** An editor's proposed source snapshot; locks and dependency revisions remain exact. */
+  readSource?: (name: string) => Promise<string>;
 }): Promise<CompiledWorkspaceRepository> => {
-  const rootLockResult = await loadQuixosLock(
+  const rootLockResult = await loadQuixosLock(path.join(options.rootDirectory, "quixos.lock"));
-    path.join(options.rootDirectory, "quixos.lock"),
-  );
   if (!rootLockResult.ok) {
     throw new Error(diagnosticsMessage("Workspace lock", rootLockResult.diagnostics));
   }
@@ -303,16 +328,25 @@ export const compileWorkspaceRepository = async (options: {
   const nodes = await resolver.nodes();
   const environment = environmentFor(directPairs, nodes);
   const workspacePath = path.join(options.rootDirectory, "workspace.qx");
-  const workspaceSource = await readFile(workspacePath, "utf8");
+  const sources = options.readSource
-  const compiled = compileCapabilitySource(workspaceSource, workspacePath, environment);
+    ? await resolveQxSources(options.readSource)
+    : await loadQxSources(options.rootDirectory);
+  const compiled = compileCapabilitySource(sources.source, workspacePath, environment);
   if (!compiled.ok) {
-    throw new Error(diagnosticsMessage("Workspace", compiled.diagnostics));
+    throw new Error(
+      diagnosticsMessage(
+        "Workspace",
+        compiled.diagnostics.map((diagnostic) =>
+          diagnostic.line > 0
+            ? { ...diagnostic, ...sources.originalPosition(diagnostic.line, diagnostic.column) }
+            : diagnostic,
+        ),
+      ),
+    );
   }
   assertImportsMatchLock(workspacePath, compiled.imports, rootLock.resources);
   const availableInterfaceIds = new Set(
-    nodes.flatMap((node) => node.resource.kind === "interface"
+    nodes.flatMap((node) => (node.resource.kind === "interface" ? [node.resource.revision.revisionId] : [])),
-      ? [node.resource.revision.revisionId]
-      : []),
   );
   const availableAtomIds = new Set(compiled.workspace.atoms.map((atom) => atom.id));
   for (const node of nodes) {
@@ -320,7 +354,7 @@ export const compileWorkspaceRepository = async (options: {
       if (!availableInterfaceIds.has(requirement.revisionId)) {
         throw new Error(
           `${node.kind} ${node.resource.revision.displayName} requires external interface ` +
-          `${requirement.binding} (${requirement.revisionId}), but the workspace resource graph does not provide it`,
+            `${requirement.binding} (${requirement.revisionId}), but the workspace resource graph does not provide it`,
         );
       }
     }
@@ -328,28 +362,31 @@ export const compileWorkspaceRepository = async (options: {
       if (!availableAtomIds.has(atom.id)) {
         throw new Error(
           `${node.kind} ${node.resource.revision.displayName} requires external atom ` +
-          `${atom.displayName} (${atom.id}), but the workspace does not define it`,
+            `${atom.displayName} (${atom.id}), but the workspace does not define it`,
         );
       }
     }
   }
   const workspace: WorkspaceRevision = {
     ...compiled.workspace,
-    ...(options.workspaceId
+    ...(options.workspaceId ? { workspaceId: capabilityId.workspace(options.workspaceId) } : {}),
-      ? { workspaceId: capabilityId.workspace(options.workspaceId) }
-      : {}),
     ...(options.workspaceRevisionId
       ? { id: capabilityId.workspaceRevision(options.workspaceRevisionId) }
-      : {}),
+      : options.sourceRootCommit
-    ...(options.sourceRootCommit
+        ? {
-      ? { sourceRootCommit: options.sourceRootCommit }
+            id: capabilityId.workspaceRevision(
-      : {}),
+              `workspace-revision:${options.workspaceId ?? compiled.workspace.workspaceId}:${options.sourceRootCommit}`,
+            ),
+          }
+        : {}),
+    ...(options.sourceRootCommit ? { sourceRootCommit: options.sourceRootCommit } : {}),
   };
   const checked = compileWorkspaceRevision(workspace);
   if (!checked.ok) {
     throw new Error(
-      `Instantiated workspace did not compile:\n${checked.issues.map((entry) =>
+      `Instantiated workspace did not compile:\n${checked.issues
-        `${entry.path}: ${entry.message}`).join("\n")}`,
+        .map((entry) => `${entry.path}: ${entry.message}`)
+        .join("\n")}`,
     );
   }
   return {
@@ -357,9 +394,6 @@ export const compileWorkspaceRepository = async (options: {
     plan: checked.plan,
     lock: rootLock,
     resources: nodes,
-    directResources: new Map(directPairs.map(([locked, node]) => [
+    directResources: new Map(directPairs.map(([locked, node]) => [bindingKey(locked.kind, locked.binding), node])),
-      bindingKey(locked.kind, locked.binding),
-      node,
-    ])),
   };
 };

src/capability-language/authoring-check.ts

@@ -0,0 +1,168 @@
+import fs from "node:fs/promises";
+import { appendFileSync } from "node:fs";
+import path from "node:path";
+import { createHash, randomUUID } from "node:crypto";
+import { authoringContext } from "./authoring-context.js";
+import type { convergeAuthoring } from "./authoring-converge.js";
+import { execFile as callback } from "node:child_process";
+import { promisify } from "node:util";
+import { buildImmutableCandidate, checkerIdentity } from "./checked-build.js";
+import { planEvolution, type WorkspaceRevision, type EvolutionReview } from "../capability-model/index.js";
+
+export const checkRecordName = (directory: string) => createHash("sha256").update(directory).digest("hex") + ".json";
+export async function checkAuthoring(
+  start: string,
+  output: string,
+  options: { baseline?: string; reviews?: string; contractOnly?: boolean } = {},
+) {
+  const started = performance.now();
+  const timings: Record<string, number> = {};
+  const context = await authoringContext(start);
+  const location = await fs.realpath(start);
+  const directory = location === context.workbench ? "root" : path.relative(context.workbench, location);
+  const resource = context.resources.find((entry) => entry.directory === directory);
+  if (!resource) throw new Error("Run check from a registered repository root or the workbench");
+  await fs.mkdir(output, { mode: 0o700 });
+  const report: {
+    directory: string;
+    checker: string;
+    candidateOnly: true;
+    activationEvidence: false;
+    commit?: string;
+    artifactPath?: string;
+    blockers: string[];
+    phase: string;
+    output: string;
+    compilation?: "passed";
+    activationReadiness?: "preserve" | "migration-required" | "blocked";
+    migrationRequired?: string[];
+  } = {
+    directory,
+    checker: checkerIdentity(),
+    candidateOnly: true,
+    activationEvidence: false,
+    blockers: [],
+    phase: "convergence",
+    output,
+  };
+  const progress = async (running = true) => {
+    const file = path.join(output, "report.json"),
+      temp = `${file}.tmp`;
+    await fs.writeFile(temp, JSON.stringify({ ...report, timings, running }, null, 2));
+    await fs.rename(temp, file);
+  };
+  await progress();
+  try {
+    console.error(`[${new Date().toISOString()}] Check: capture source and converge dependencies`);
+    // Serialize only source capture, not the potentially slow Nix build.
+    // Repository-scoped agents can check separate immutable candidates in parallel.
+    const capture = promisify(callback)("quixos-qx", ["converge", context.workbench, directory], {
+      maxBuffer: 4 * 1024 * 1024,
+      env: { ...process.env, QUIXOS_JJ_NO_CHECKPOINT: "1", QUIXOS_TRACE_CAPTURE: "1" },
+    });
+    console.error(`Capture details: ${path.join(output, "capture.log")}`);
+    capture.child.stderr?.on("data", (chunk) => appendFileSync(path.join(output, "capture.log"), chunk));
+    const captured = await capture.catch((error) => {
+      if (typeof error.stdout === "string" && error.stdout.trim().startsWith("{")) return { stdout: error.stdout };
+      throw error;
+    });
+    const converged = JSON.parse(captured.stdout) as Awaited<ReturnType<typeof convergeAuthoring>>;
+    timings.captureMs = Math.round(performance.now() - started);
+    console.error(`[${new Date().toISOString()}] Check: source captured in ${(timings.captureMs / 1000).toFixed(1)}s`);
+    if (!converged.candidate) {
+      report.phase = converged.worklist.find((entry) => entry.phase !== "dependency")?.phase ?? "convergence";
+      throw new Error(
+        converged.worklist.map((entry) => `${entry.directory} [${entry.phase}]: ${entry.message}`).join("\n"),
+      );
+    }
+    report.commit = converged.candidate.commit;
+    report.phase = "verification";
+    await progress();
+    const buildStarted = performance.now();
+    console.error(
+      `[${new Date().toISOString()}] Check: immutable Nix ${options.contractOnly ? "contract" : "verification"}; build output: ${path.join(output, "nix.log")}`,
+    );
+    try {
+      report.artifactPath = await buildImmutableCandidate(
+        converged.candidate,
+        resource.kind,
+        path.join(output, "nix.log"),
+        options.contractOnly,
+      );
+    } finally {
+      timings.immutableCheckMs = Math.round(performance.now() - buildStarted);
+      console.error(
+        `[${new Date().toISOString()}] Check: immutable phase ended after ${(timings.immutableCheckMs / 1000).toFixed(1)}s`,
+      );
+    }
+    const candidateText = await fs.readFile(path.join(report.artifactPath, "candidate.json"), "utf8");
+    await fs.writeFile(path.join(output, "candidate.json"), candidateText);
+    report.compilation = "passed";
+    if (resource.kind === "workspace" && !options.contractOnly) {
+      report.phase = "evolution";
+      await progress();
+      let baseline = options.baseline;
+      if (!baseline) {
+        try {
+          const host = JSON.parse(await fs.readFile("/etc/quixos/workspace-source.json", "utf8"));
+          if ((await fs.realpath(host.workbenchRoot)) === context.workbench)
+            baseline = JSON.parse(
+              await fs.readFile(path.join(host.runtimeClosureRoot, "manifest.json"), "utf8"),
+            ).workspacePlanPath;
+        } catch (error) {
+          if ((error as NodeJS.ErrnoException).code !== "ENOENT") throw error;
+        }
+      }
+      const before = baseline ? (JSON.parse(await fs.readFile(baseline, "utf8")) as WorkspaceRevision) : null;
+      const reviews = options.reviews
+        ? (JSON.parse(await fs.readFile(options.reviews, "utf8")) as EvolutionReview[])
+        : [];
+      const evolution = planEvolution(before, JSON.parse(candidateText), { reviews });
+      await fs.writeFile(path.join(output, "evolution.json"), JSON.stringify(evolution, null, 2));
+      report.blockers.push(...evolution.blockers);
+      report.migrationRequired = evolution.migrationRequired;
+      report.activationReadiness = evolution.blockers.length
+        ? "blocked"
+        : evolution.migrationRequired.length
+          ? "migration-required"
+          : "preserve";
+      if (evolution.migrationRequired.length)
+        report.blockers.push(
+          `Explicit migration required for: ${evolution.migrationRequired.join(", ")}. Compilation passed; supply a migration path before cutover.`,
+        );
+    }
+    if (!report.blockers.length) report.phase = options.contractOnly ? "contract-only" : "checked";
+  } catch (error) {
+    report.blockers.push(String(error instanceof Error ? error.message : error));
+  }
+  timings.totalMs = Math.round(performance.now() - started);
+  Object.assign(report, { timings });
+  await progress(false);
+  if (options.contractOnly) return report;
+  const records = path.join(context.workbench, ".quixos/checks");
+  await fs.mkdir(records, { recursive: true });
+  const remember = async (value: typeof report) => {
+    const filename = path.join(records, checkRecordName(value.directory)),
+      temporary = `${filename}.${randomUUID()}.tmp`;
+    await fs.writeFile(temporary, JSON.stringify(value, null, 2), { flag: "wx", mode: 0o600 });
+    await fs.rename(temporary, filename);
+  };
+  if (report.artifactPath) {
+    const graph = JSON.parse(await fs.readFile(path.join(report.artifactPath, "graph.json"), "utf8"));
+    for (const checked of graph.resources) {
+      const managed = context.resources.find(
+        (entry) => entry.kind === checked.kind && entry.source?.repository === checked.source.repository,
+      );
+      if (managed && managed.directory !== directory)
+        await remember({
+          ...report,
+          directory: managed.directory,
+          commit: checked.source.commit,
+          blockers: [],
+          phase: "checked",
+        });
+    }
+  }
+  await remember(report);
+  return report;
+}

src/capability-language/authoring-context.ts

@@ -0,0 +1,70 @@
+import { readFile, realpath } from "node:fs/promises";
+import path from "node:path";
+import { loadQuixosLock, type GitSource } from "../resource-lock/index.js";
+
+export type AuthoringResource = {
+  kind: "workspace" | "interface" | "package";
+  directory: string;
+  resourceId?: string;
+  source?: GitSource;
+};
+
+/** Registration, not directory co-location, defines the editable selection. */
+export async function authoringContext(start: string) {
+  let workbench = await realpath(start);
+  for (;;) {
+    let text: string | undefined;
+    try {
+      text = await readFile(path.join(workbench, ".quixos/resource-graph.json"), "utf8");
+    } catch (error) {
+      if ((error as NodeJS.ErrnoException).code !== "ENOENT") throw error;
+    }
+    if (text !== undefined) {
+      const graph = JSON.parse(text) as { resources: AuthoringResource[] };
+      if (!Array.isArray(graph.resources)) throw new Error("Managed resource inventory is malformed");
+      const resources: AuthoringResource[] = [{ kind: "workspace", directory: "root" }];
+      const identities = new Set<string>(),
+        directories = new Set<string>(["root"]);
+      for (const entry of graph.resources) {
+        // Compiler graphs carry resolved paths; the authoring API presents
+        // stable workbench-relative names and validates containment here.
+        if (typeof entry.directory === "string" && path.isAbsolute(entry.directory))
+          entry.directory = path.relative(workbench, entry.directory);
+        if (
+          !["interface", "package"].includes(entry.kind) ||
+          !entry.source ||
+          !/^resources\/[A-Za-z0-9][A-Za-z0-9._-]*$/.test(entry.directory)
+        ) {
+          throw new Error("Invalid managed resource registration");
+        }
+        const identity = `${entry.kind}\0${entry.resourceId ?? entry.source.repository}`;
+        if (identities.has(identity) || directories.has(entry.directory)) {
+          throw new Error(`Multiple editable selections for ${entry.resourceId ?? entry.source.repository}`);
+        }
+        identities.add(identity);
+        directories.add(entry.directory);
+        resources.push({
+          kind: entry.kind,
+          directory: entry.directory,
+          resourceId: entry.resourceId,
+          source: entry.source,
+        });
+      }
+      return {
+        workbench,
+        resources,
+        async baseline() {
+          const result = await loadQuixosLock(path.join(workbench, "root/quixos.lock"));
+          if (!result.ok)
+            throw new Error(
+              `Workspace source baseline is invalid: ${result.diagnostics.map((d) => d.message).join("; ")}`,
+            );
+          return result.lock.quixos;
+        },
+      };
+    }
+    const parent = path.dirname(workbench);
+    if (parent === workbench) throw new Error("Not in a managed workbench; select one with --workbench DIRECTORY");
+    workbench = parent;
+  }
+}

src/capability-language/authoring-converge.ts

@@ -0,0 +1,250 @@
+import { readFile, writeFile, rename, rm, realpath } from "node:fs/promises";
+import path from "node:path";
+import { execFile as callback } from "node:child_process";
+import { promisify } from "node:util";
+import { randomUUID } from "node:crypto";
+import { authoringContext } from "./authoring-context.js";
+import { snapshotCommit } from "./checked-build.js";
+import {
+  loadQuixosLock,
+  parseQuixosLockDocument,
+  formatQuixosLockDocument,
+  retentionTagForCommit,
+  type GitSource,
+} from "../resource-lock/index.js";
+
+const execFile = promisify(callback);
+const command = async (cwd: string, executable: string, args: string[]) => {
+  const start = performance.now();
+  // Do not log arguments: transports may contain credentials. Source identities
+  // remain in the normal checked result, not in this timing channel.
+  const label = `${path.basename(cwd)} ${executable} ${args[0]}`;
+  try {
+    return (
+      await execFile(executable, args, {
+        cwd,
+        maxBuffer: 4 * 1024 * 1024,
+        env: { ...process.env, QUIXOS_JJ_NO_CHECKPOINT: "1", QUIXOS_SUBTREE_PUBLISH: "0", GIT_TERMINAL_PROMPT: "0" },
+      })
+    ).stdout.trim();
+  } finally {
+    if (process.env.QUIXOS_TRACE_CAPTURE === "1")
+      console.error(`[${new Date().toISOString()}] Capture: ${label}: ${Math.round(performance.now() - start)}ms`);
+  }
+};
+const identity = (kind: string, repository: string) => `${kind}\0${repository}`;
+
+export type AuthoringBlocker = {
+  directory: string;
+  phase: "resolution" | "dependency" | "source" | "publication" | "concurrent-edit";
+  message: string;
+};
+
+/** Source retention only. Neither successful convergence nor an empty source
+ * worklist grants typechecking, semantic review or activation approval.
+ * Caller serializes coordinators; package authors may still be editing. */
+export async function convergeAuthoring(start: string, target = "root") {
+  const context = await authoringContext(start);
+  const graphFile = path.join(context.workbench, ".quixos/resource-graph.json");
+  const graphBefore = await readFile(graphFile, "utf8");
+  const blockers: AuthoringBlocker[] = [];
+  const nodes = new Map<string, { directory: string; kind: string; source: GitSource; dependencies: string[] }>();
+  const selected = new Map<string, string>();
+  for (const entry of context.resources) {
+    const root = path.join(context.workbench, entry.directory);
+    let repository = entry.source?.repository;
+    try {
+      if ((await realpath(root)) !== root) throw new Error(`Managed checkout crosses a symlink: ${entry.directory}`);
+      // Transport rewrites must not become committed source identities.
+      const origin = await command(root, "git", ["config", "--get", "remote.origin.url"]);
+      if (repository && origin !== repository)
+        throw new Error(`Origin differs from registered source for ${entry.directory}`);
+      repository ??= origin;
+    } catch (error) {
+      blockers.push({ directory: entry.directory, phase: "source", message: String(error).slice(0, 2000) });
+      if (!repository) throw error; // The root has no separate registered source.
+    }
+    const key = identity(entry.kind, repository);
+    if (selected.has(key)) throw new Error(`More than one editable checkout for ${repository}`);
+    selected.set(key, entry.directory);
+    nodes.set(entry.directory, {
+      ...entry,
+      source: { resolver: "git", repository, commit: entry.source?.commit ?? "" },
+      dependencies: [],
+    });
+  }
+  for (const node of nodes.values()) {
+    try {
+      const lock = await loadQuixosLock(path.join(context.workbench, node.directory, "quixos.lock"));
+      if (!lock.ok) throw new Error(lock.diagnostics.map((d) => `${d.fileName}: ${d.message}`).join("\n"));
+      node.dependencies = [
+        ...new Set(
+          lock.lock.resources.flatMap((entry) => {
+            const directory = selected.get(identity(entry.kind, entry.source.repository));
+            return directory ? [directory] : [];
+          }),
+        ),
+      ];
+    } catch (error) {
+      blockers.push({ directory: node.directory, phase: "resolution", message: String(error) });
+    }
+  }
+  const complete = new Map<string, GitSource>(),
+    active = new Set<string>();
+  const visited = new Set<string>();
+  if (!nodes.has(target)) throw new Error(`Not a registered repository: ${target}`);
+  const visit = async (directory: string): Promise<boolean> => {
+    visited.add(directory);
+    if (complete.has(directory)) return true;
+    if (blockers.some((entry) => entry.directory === directory)) return false;
+    if (active.has(directory)) {
+      blockers.push({
+        directory,
+        phase: "dependency",
+        message: `Source dependency cycle: ${[...active, directory].join(" -> ")}`,
+      });
+      return false;
+    }
+    active.add(directory);
+    const node = nodes.get(directory)!;
+    for (const dependency of node.dependencies)
+      if (!(await visit(dependency))) {
+        blockers.push({ directory, phase: "dependency", message: `Waiting for ${dependency}` });
+        active.delete(directory);
+        return false;
+      }
+    const root = path.join(context.workbench, directory);
+    let phase: AuthoringBlocker["phase"] = "source";
+    try {
+      const lock = await loadQuixosLock(path.join(root, "quixos.lock"));
+      if (!lock.ok) throw new Error("Lock changed during convergence; retry after joining writers");
+      for (const file of lock.lock.sourceFiles ?? ["quixos.lock"]) {
+        const filename = path.join(root, file),
+          before = await readFile(filename, "utf8");
+        const parsed = parseQuixosLockDocument(before, file);
+        if (!parsed.ok) throw new Error(`Invalid lock ${file}`);
+        let changed = false;
+        for (const dependency of parsed.document.resources) {
+          const target = selected.get(identity(dependency.kind, dependency.source.repository));
+          const source = target ? complete.get(target) : undefined;
+          if (target && !source)
+            throw new Error(`Dependencies changed during convergence (${dependency.binding}); join writers and retry`);
+          if (source && source.commit !== dependency.source.commit) {
+            dependency.source = source;
+            changed = true;
+          }
+        }
+        if (changed) {
+          const temporary = `${filename}.${randomUUID()}.tmp`;
+          try {
+            await writeFile(temporary, formatQuixosLockDocument(parsed.document), { flag: "wx" });
+            if ((await readFile(filename, "utf8")) !== before)
+              throw new Error(`Concurrent edit to ${file}; retry after joining writers`);
+            await rename(temporary, filename);
+          } finally {
+            await rm(temporary, { force: true });
+          }
+        }
+      }
+      const snapshotStarted = performance.now();
+      const commit = await snapshotCommit(root);
+      if (process.env.QUIXOS_TRACE_CAPTURE === "1")
+        console.error(
+          `[${new Date().toISOString()}] Capture: ${directory} snapshot: ${Math.round(performance.now() - snapshotStarted)}ms`,
+        );
+      phase = "publication";
+      const ref = retentionTagForCommit(commit);
+      const remote = await command(root, "git", ["ls-remote", "--refs", node.source.repository, ref]);
+      if (remote && remote.split(/\s+/)[0] !== commit) throw new Error(`Conflicting immutable retention ref ${ref}`);
+      if (!remote) await command(root, "git", ["push", node.source.repository, `${commit}:${ref}`]);
+      if ((await command(root, "git", ["ls-remote", "--refs", node.source.repository, ref])).split(/\s+/)[0] !== commit)
+        throw new Error("Published source retention was not observed");
+      complete.set(directory, { ...node.source, commit });
+    } catch (error) {
+      blockers.push({ directory, phase, message: String(error).slice(0, 4000) });
+    }
+    active.delete(directory);
+    return complete.has(directory);
+  };
+  // Include newly created, not-yet-imported resources, then the root.
+  if (target === "root") for (const directory of [...nodes.keys()].filter((d) => d !== "root")) await visit(directory);
+  await visit(target);
+  for (let index = blockers.length - 1; index >= 0; index--)
+    if (!visited.has(blockers[index].directory)) blockers.splice(index, 1);
+  for (const [directory, source] of complete) {
+    try {
+      if ((await snapshotCommit(path.join(context.workbench, directory))) !== source.commit)
+        throw new Error("Source advanced while converging; join writers and retry");
+    } catch (error) {
+      blockers.push({ directory, phase: "concurrent-edit", message: String(error) });
+    }
+  }
+  // Persist successful selections even if another repository is still broken.
+  // Recovery must not depend on all parents succeeding in the same invocation.
+  const graph = JSON.parse(graphBefore);
+  for (const resource of graph.resources)
+    resource.directory = path.relative(context.workbench, path.resolve(context.workbench, resource.directory));
+  const replacements = new Map<string, string>();
+  for (const resource of graph.resources) {
+    const source = complete.get(resource.directory);
+    if (!source) continue;
+    const key = `${resource.kind}\0${source.repository}\0${source.commit}`;
+    replacements.set(resource.key, key);
+    if (resource.source.commit !== source.commit) delete resource.revisionId;
+    resource.source = source;
+    resource.key = key;
+  }
+  for (const resource of graph.resources)
+    for (const dependency of resource.dependencies ?? []) {
+      dependency.resourceKey = replacements.get(dependency.resourceKey) ?? dependency.resourceKey;
+    }
+  for (const direct of graph.directResources ?? [])
+    direct.resourceKey = replacements.get(direct.resourceKey) ?? direct.resourceKey;
+  // Inventory is a projection of actual locks, including newly added/removed
+  // imports. Never require a successful parent compilation to repair it.
+  for (const [directory] of complete) {
+    const lock = await loadQuixosLock(path.join(context.workbench, directory, "quixos.lock"));
+    if (!lock.ok) continue;
+    const dependencies = lock.lock.resources.map((dependency) => ({
+      binding: `${dependency.kind}\0${dependency.binding}`,
+      resourceKey: `${dependency.kind}\0${dependency.source.repository}\0${dependency.source.commit}`,
+    }));
+    if (directory === "root") {
+      graph.quixos = lock.lock.quixos;
+      graph.directResources = lock.lock.resources.map((dependency, index) => ({
+        kind: dependency.kind,
+        binding: dependency.binding,
+        resourceKey: dependencies[index].resourceKey,
+        ...(selected.has(identity(dependency.kind, dependency.source.repository))
+          ? { directory: selected.get(identity(dependency.kind, dependency.source.repository)) }
+          : {}),
+      }));
+    } else {
+      const resource = graph.resources.find((entry: { directory: string }) => entry.directory === directory);
+      if (resource) resource.dependencies = dependencies;
+    }
+  }
+  const graphAfter = JSON.stringify(graph, null, 2) + "\n";
+  if (graphBefore !== graphAfter) {
+    const temporary = `${graphFile}.${randomUUID()}.tmp`;
+    try {
+      await writeFile(temporary, graphAfter, { flag: "wx", mode: 0o600 });
+      if ((await readFile(graphFile, "utf8")) !== graphBefore)
+        throw new Error(
+          "Managed inventory changed during convergence; source is retained, retry after joining writers",
+        );
+      await rename(temporary, graphFile);
+    } finally {
+      await rm(temporary, { force: true });
+    }
+  }
+  return {
+    workbench: context.workbench,
+    converged: blockers.length === 0,
+    candidate: blockers.length ? null : (complete.get(target) ?? null),
+    retained: [...complete].map(([directory, source]) => ({ directory, source })),
+    worklist: blockers,
+    verificationEvidence: false,
+    activated: false,
+  };
+}

src/capability-language/authoring-inspect.ts

@@ -0,0 +1,113 @@
+import { execFile as callback } from "node:child_process";
+import { promisify } from "node:util";
+import { realpath } from "node:fs/promises";
+import path from "node:path";
+import { parseQx, walkSyntax } from "./source.js";
+import { authoringContext } from "./authoring-context.js";
+import { readQxSource } from "./source-loader.js";
+import { loadQuixosLock } from "../resource-lock/index.js";
+
+const execFile = promisify(callback);
+const git = async (root: string, args: string[]) =>
+  (
+    await execFile("git", ["-C", root, ...args], {
+      maxBuffer: 8 * 1024 * 1024,
+      env: { ...process.env, GIT_TERMINAL_PROMPT: "0" },
+    })
+  ).stdout;
+const message = (error: unknown) => String(error instanceof Error ? error.message : error).slice(0, 2000);
+
+/** Syntax-only contract inspection is deliberately NOT verification evidence.
+ * Each file can recover independently; current valid files always win. */
+export async function inspectAuthoringRepository(root: string, historyLimit = 100) {
+  const names = (await git(root, ["ls-files", "-z", "--cached", "--others", "--exclude-standard"]))
+    .split("\0")
+    .filter((name) => name.endsWith(".qx"));
+  if (names.length > 128)
+    throw new Error("Repository inspection exceeds 128 QX files; split the resource into smaller repositories");
+  const files = [];
+  for (const name of [...new Set(names)].sort()) {
+    let source = "",
+      errors: unknown[] = [],
+      revision: string | null = null;
+    try {
+      source = await readQxSource(root, name);
+      if (source.length > 262144) throw new Error(`Inspection file exceeds 256 KiB: ${name}`);
+      errors = parseQx(source, name).diagnostics;
+    } catch (error) {
+      errors = [{ message: message(error) }];
+    }
+    const currentErrors = errors;
+    if (errors.length) {
+      // Git can traverse jj's immutable commit DAG without mutating/snapshotting @.
+      const head = await execFile("jj", ["--ignore-working-copy", "log", "--no-graph", "-r", "@", "-T", "commit_id"], {
+        cwd: root,
+        env: { ...process.env, QUIXOS_JJ_NO_CHECKPOINT: "1" },
+      }).then(
+        (r) => r.stdout.trim(),
+        () => "HEAD",
+      );
+      const commits = await git(root, ["rev-list", `--max-count=${historyLimit}`, head, "--", name]).catch(() => "");
+      for (const commit of commits.trim().split("\n").filter(Boolean)) {
+        const historical = await git(root, ["show", `${commit}:${name}`]).catch(() => null);
+        if (historical === null || historical.length > 262144) continue;
+        if (!parseQx(historical, name).diagnostics.length) {
+          source = historical;
+          revision = commit;
+          errors = [];
+          break;
+        }
+      }
+    }
+    const syntax = errors.length ? null : parseQx(source, name);
+    files.push({
+      file: name,
+      status: errors.length ? "unavailable" : revision ? "historical" : "current",
+      revision,
+      currentErrors: currentErrors.slice(0, 20),
+      omittedErrors: Math.max(0, currentErrors.length - 20),
+      declarations: syntax
+        ? [...walkSyntax(syntax.root)]
+            .filter((node) =>
+              /^(?:interface|package|atom|state|edge|method|function|event|conformance)\w*Decl$/.test(node.kind),
+            )
+            .map((node) => ({ kind: node.kind, source: source.slice(node.start, node.end) }))
+        : [],
+    });
+  }
+  return { verificationEvidence: false as const, resolutionChecked: false as const, files };
+}
+
+export async function inspectWorkbench(start: string, selector?: string) {
+  const context = await authoringContext(start);
+  if (!selector || selector === ".") {
+    const relative = path.relative(context.workbench, await realpath(start));
+    selector =
+      context.resources.find((entry) => relative === entry.directory || relative.startsWith(entry.directory + path.sep))
+        ?.directory ?? "root";
+  }
+  const lock = await loadQuixosLock(path.join(context.workbench, "root/quixos.lock"));
+  const aliases = lock.ok ? lock.lock.resources.filter((entry) => entry.binding === selector) : [];
+  const selected = context.resources.filter(
+    (entry) =>
+      !selector ||
+      selector === entry.directory ||
+      selector === entry.resourceId ||
+      selector === path.basename(entry.directory) ||
+      aliases.some((alias) => alias.kind === entry.kind && alias.source.repository === entry.source?.repository),
+  );
+  if (!selected.length) throw new Error(`No registered resource matches ${selector}`);
+  if (selector && selected.length > 1)
+    throw new Error(`Ambiguous resource ${selector}; use its resource ID or directory`);
+  const resources = [];
+  for (const entry of selected) {
+    try {
+      const root = path.join(context.workbench, entry.directory);
+      if ((await realpath(root)) !== root) throw new Error("Managed checkout crosses a symlink");
+      resources.push({ ...entry, ...(await inspectAuthoringRepository(root)) });
+    } catch (error) {
+      resources.push({ ...entry, error: message(error) });
+    }
+  }
+  return { workbench: context.workbench, verificationEvidence: false, resources };
+}

src/capability-language/authoring-worklist.ts

@@ -0,0 +1,119 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+import { execFile as callback } from "node:child_process";
+import { promisify } from "node:util";
+import { authoringContext } from "./authoring-context.js";
+import { inspectAuthoringRepository } from "./authoring-inspect.js";
+import { checkRecordName } from "./authoring-check.js";
+import { loadQuixosLock } from "../resource-lock/index.js";
+import { checkerIdentity } from "./checked-build.js";
+
+const execFile = promisify(callback);
+export async function authoringWorklist(start: string) {
+  const context = await authoringContext(start);
+  const entries: { directory: string; resourceId?: string; phase: string; message: string; next: string }[] = [];
+  const dependencies = new Map<string, string[]>();
+  for (const resource of context.resources) {
+    const root = path.join(context.workbench, resource.directory);
+    const add = (phase: string, message: string) =>
+      entries.push({
+        directory: resource.directory,
+        resourceId: resource.resourceId,
+        phase,
+        message,
+        next:
+          phase === "syntax"
+            ? `qx-workspace inspect ${resource.directory}`
+            : phase === "evolution"
+              ? "Inspect evolution.json in the check output; resolve its named migration/review requirements before cutover"
+              : `cd ${resource.directory} && qx-workspace check`,
+      });
+    try {
+      if ((await fs.realpath(root)) !== root) throw new Error("Registered checkout crosses a symlink");
+      const inspected = await inspectAuthoringRepository(root);
+      for (const file of inspected.files)
+        if (file.currentErrors.length)
+          add(
+            "syntax",
+            `${file.file}: ${JSON.stringify(file.currentErrors)}${file.status === "historical" ? `; historical contract available at ${file.revision}` : ""}`,
+          );
+      const lock = await loadQuixosLock(path.join(root, "quixos.lock"));
+      if (!lock.ok)
+        add("resolution", lock.diagnostics.map((entry) => `${entry.fileName}: ${entry.message}`).join("\n"));
+      else
+        dependencies.set(
+          resource.directory,
+          lock.lock.resources.flatMap((dependency) => {
+            const selected = context.resources.find(
+              (entry) => entry.kind === dependency.kind && entry.source?.repository === dependency.source.repository,
+            );
+            if (selected?.source && selected.source.commit !== dependency.source.commit)
+              add("propagation", `Dependency ${dependency.binding} has advanced; check will repin it automatically`);
+            return selected ? [selected.directory] : [];
+          }),
+        );
+      let record;
+      try {
+        record = JSON.parse(
+          await fs.readFile(
+            path.join(context.workbench, ".quixos/checks", checkRecordName(resource.directory)),
+            "utf8",
+          ),
+        );
+      } catch (error) {
+        if ((error as NodeJS.ErrnoException).code !== "ENOENT") throw error;
+      }
+      if (!record?.commit) {
+        if (record?.blockers?.length) add(record.phase, record.blockers.join("\n"));
+        else add("unchecked", "No immutable candidate check recorded yet");
+        continue;
+      }
+      if (record.checker !== checkerIdentity()) add("unchecked", "The installed checker changed since the last check");
+      const env = { ...process.env, QUIXOS_JJ_NO_CHECKPOINT: "1" };
+      const commit = (
+        await execFile("jj", ["--ignore-working-copy", "log", "--no-graph", "-r", "@", "-T", "commit_id"], {
+          cwd: root,
+          env,
+        })
+      ).stdout.trim();
+      const dirty = await execFile("git", ["diff", "--quiet", "--no-ext-diff", record.commit, "--"], {
+        cwd: root,
+      }).then(
+        () => false,
+        () => true,
+      );
+      const untracked = (await execFile("git", ["ls-files", "--others", "--exclude-standard"], { cwd: root })).stdout;
+      if (commit !== record.commit || dirty || untracked)
+        add("unchecked", `Edits are newer than the last check (${record.commit.slice(0, 12)})`);
+      else if (record.blockers?.length) add(record.phase, record.blockers.join("\n"));
+    } catch (error) {
+      add("inspection", String(error).slice(0, 3000));
+    }
+  }
+  // Fixed-point propagation, independent of registration order.
+  const blocked = new Set(entries.map((entry) => entry.directory));
+  let changed = true;
+  while (changed) {
+    changed = false;
+    for (const [directory, required] of dependencies)
+      if (!blocked.has(directory)) {
+        const waiting = required.filter((dependency) => blocked.has(dependency));
+        if (waiting.length) {
+          blocked.add(directory);
+          changed = true;
+          entries.push({
+            directory,
+            phase: "dependency",
+            message: `Waiting for ${waiting.join(", ")}`,
+            next: "Resolve the named repositories, then rerun check",
+          });
+        }
+      }
+  }
+  return {
+    workbench: context.workbench,
+    verificationEvidence: false,
+    worklist: entries,
+    note: "Derived authoring guidance, not activation approval. Independent repositories can be delegated separately; join writers before a root check.",
+  };
+}

src/capability-language/candidate-check.ts

@@ -0,0 +1,264 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+import os from "node:os";
+import { execFile as execFileCallback } from "node:child_process";
+import { promisify } from "node:util";
+import { createHash } from "node:crypto";
+import { compileWorkspaceRepository, compileCapabilityResourceRepository } from "./assembly.js";
+import { createGitCapabilityResolver } from "./git-resolver.js";
+import {
+  contentDigest,
+  planEvolution,
+  type EvolutionReview,
+  type WorkspaceRevision,
+} from "../capability-model/index.js";
+import { bindingSchema, specializeBindingSchema } from "../bindings/index.js";
+import { snapshotCommit, checkoutCommit, buildCheckedPackage } from "./checked-build.js";
+const execFile = promisify(execFileCallback);
+const bytesDigest = (value: Uint8Array) => `sha256:${createHash("sha256").update(value).digest("hex")}`;
+
+export const localResourceSnapshots = async (
+  root: string,
+  filename?: string,
+): Promise<{ resources: { kind: string; repository: string; commit: string; directory: string }[] }> => {
+  if (filename) {
+    const document = JSON.parse(await fs.readFile(filename, "utf8"));
+    return {
+      resources: document.resources.map((entry: { directory: string }) => ({
+        ...entry,
+        directory: path.resolve(path.dirname(filename), entry.directory),
+      })),
+    };
+  }
+  let directory = await fs.realpath(root);
+  for (;;) {
+    let graphText: string | undefined;
+    try {
+      graphText = await fs.readFile(path.join(directory, ".quixos/resource-graph.json"), "utf8");
+    } catch (error) {
+      if ((error as NodeJS.ErrnoException).code !== "ENOENT") throw error;
+    }
+    if (graphText !== undefined) {
+      const graph = JSON.parse(graphText);
+      const resources = [];
+      for (const entry of graph.resources) {
+        const location = await fs.realpath(path.resolve(directory, entry.directory));
+        if (!location.startsWith(`${directory}/resources/`))
+          throw new Error("Workbench resource escapes managed directory");
+        resources.push({ kind: entry.kind, ...entry.source, directory: location });
+      }
+      return { resources };
+    }
+    const parent = path.dirname(directory);
+    if (parent === directory) return { resources: [] };
+    directory = parent;
+  }
+};
+
+/** Copy actual authoring files without snapshotting jj or creating a Git commit. */
+export const snapshotRepository = async (source: string, destination: string) => {
+  const root = await fs.realpath(source);
+  const files = async () =>
+    (
+      await execFile("git", ["-C", root, "ls-files", "--cached", "--others", "--exclude-standard", "-z"], {
+        maxBuffer: 16 * 1024 * 1024,
+      })
+    ).stdout
+      .split("\0")
+      .filter(Boolean)
+      .sort();
+  const names = [...new Set(await files())];
+  if (names.length > 50_000) throw new Error("Candidate source exceeds 50000 files");
+  const contents: { name: string; digest: string; mode: number }[] = [];
+  let bytes = 0;
+  await fs.mkdir(destination, { recursive: true, mode: 0o700 });
+  for (const name of names) {
+    if (path.isAbsolute(name) || name.split(/[\\/]/).some((part) => part === ".." || part === ".git" || part === ".jj"))
+      throw new Error("Invalid candidate source path");
+    const file = path.join(root, name);
+    let metadata;
+    try {
+      metadata = await fs.lstat(file);
+    } catch (error) {
+      if ((error as NodeJS.ErrnoException).code === "ENOENT") continue;
+      throw error;
+    }
+    if (!metadata.isFile() || metadata.isSymbolicLink() || !(await fs.realpath(file)).startsWith(`${root}${path.sep}`))
+      throw new Error(`Candidate source must be a regular file: ${name}`);
+    const data = await fs.readFile(file);
+    bytes += data.length;
+    if (bytes > 128 * 1024 * 1024) throw new Error("Candidate source exceeds 128 MiB");
+    contents.push({ name, digest: bytesDigest(data), mode: metadata.mode & 0o777 });
+    await fs.mkdir(path.dirname(path.join(destination, name)), { recursive: true });
+    await fs.writeFile(path.join(destination, name), data, { flag: "wx", mode: metadata.mode & 0o777 });
+  }
+  if (JSON.stringify([...new Set(await files())]) !== JSON.stringify(names))
+    throw new Error("Source files changed during candidate snapshot");
+  for (const entry of contents)
+    if (bytesDigest(await fs.readFile(path.join(root, entry.name))) !== entry.digest)
+      throw new Error(`Source changed during candidate snapshot: ${entry.name}`);
+  return { source: root, directory: destination, treeDigest: contentDigest(contents), files: contents };
+};
+
+// Local mirrors accelerate resolution, but only their committed locked trees
+// may stand in for published dependencies. Never relabel dirty files as a pin.
+async function committedResolver(root: string, temporary: string, filename?: string, publishedOnly = false) {
+  const map = publishedOnly ? { resources: [] } : await localResourceSnapshots(root, filename);
+  const resources = [];
+  for (const [index, entry] of map.resources.entries()) {
+    const directory = path.join(temporary, `dependency-${index}`);
+    await checkoutCommit(entry.directory, entry.commit, directory);
+    resources.push({ ...entry, directory });
+  }
+  const snapshotMap = path.join(temporary, "snapshots.json");
+  await fs.writeFile(snapshotMap, JSON.stringify({ resources }));
+  return createGitCapabilityResolver({ checkoutRoot: path.join(temporary, "resolved"), snapshotMap });
+}
+
+export const checkResourceCandidate = async (options: {
+  root: string;
+  output: string;
+  kind: "package" | "interface";
+  source: { repository: string; commit: string };
+  snapshotMap?: string;
+  publishedOnly?: boolean;
+}) => {
+  await fs.mkdir(options.output, { mode: 0o700 });
+  const temporary = await fs.mkdtemp(path.join(os.tmpdir(), "qx-resource-check-"));
+  const blockers: string[] = [];
+  let treeDigest: string | undefined, commit: string | undefined, artifactPath: string | undefined;
+  try {
+    commit = await snapshotCommit(options.root);
+    treeDigest = (await snapshotRepository(options.root, path.join(temporary, "observed"))).treeDigest;
+    const root = path.join(temporary, "source");
+    await checkoutCommit(options.root, commit, root);
+    const resolveResource = await committedResolver(
+      options.root,
+      temporary,
+      options.snapshotMap,
+      options.publishedOnly,
+    );
+    const compiled = await compileCapabilityResourceRepository({
+      rootDirectory: root,
+      kind: options.kind,
+      source: { resolver: "git", repository: options.source.repository, commit },
+      resolveResource,
+    });
+    if (compiled.resource.kind === "package") {
+      const schema = path.join(temporary, "bindings.json");
+      await fs.writeFile(schema, JSON.stringify(bindingSchema(compiled)));
+      artifactPath = await buildCheckedPackage(root, schema, compiled.resource.revision.revisionId);
+    }
+    if ((await snapshotCommit(options.root)) !== commit)
+      throw new Error("Source changed during verification; run the check again");
+    await fs.writeFile(path.join(options.output, "candidate.json"), JSON.stringify(compiled.resource, null, 2));
+  } catch (error) {
+    blockers.push(error instanceof Error ? error.message : String(error));
+  } finally {
+    await fs.rm(temporary, { recursive: true, force: true });
+  }
+  const result = {
+    candidateOnly: true,
+    activationEvidence: false,
+    commit,
+    treeDigest,
+    artifactPath,
+    blockers,
+    note: "Checked immutable candidate; cutover independently checks current migration/review requirements. No publication or activation performed.",
+  };
+  await fs.writeFile(path.join(options.output, "report.json"), JSON.stringify(result, null, 2));
+  return result;
+};
+
+export const checkWorkspaceCandidate = async (options: {
+  root: string;
+  output: string;
+  snapshotMap?: string;
+  baseline?: string;
+  reviews?: string;
+}) => {
+  await fs.mkdir(options.output, { mode: 0o700 });
+  const temporary = await fs.mkdtemp(path.join(os.tmpdir(), "qx-workspace-check-"));
+  const blockers: string[] = [],
+    checks: { packageRevisionId: string; artifactPath: string }[] = [];
+  let commit: string | undefined;
+  try {
+    commit = await snapshotCommit(options.root);
+    for (const entry of (await localResourceSnapshots(options.root, options.snapshotMap)).resources) {
+      const current = await snapshotCommit(entry.directory);
+      const tree = async (revision: string) =>
+        (await execFile("git", ["rev-parse", `${revision}^{tree}`], { cwd: entry.directory })).stdout.trim();
+      if ((await tree(current)) !== (await tree(entry.commit)))
+        throw new Error(
+          `Edited resource is not in the root's locked candidate: ${entry.directory}. Check that resource, then run qx-workspace resource upgrade --publish to propagate its revision.`,
+        );
+    }
+    const root = path.join(temporary, "source");
+    await checkoutCommit(options.root, commit, root);
+    const resolveResource = await committedResolver(options.root, temporary, options.snapshotMap);
+    const compiled = await compileWorkspaceRepository({
+      rootDirectory: root,
+      sourceRootCommit: commit,
+      resolveResource,
+    });
+    const baseline = options.baseline
+      ? (JSON.parse(await fs.readFile(options.baseline, "utf8")) as WorkspaceRevision)
+      : null;
+    const reviews = options.reviews
+      ? (JSON.parse(await fs.readFile(options.reviews, "utf8")) as EvolutionReview[])
+      : [];
+    const evolution = planEvolution(baseline, compiled.workspace, { reviews });
+    blockers.push(...evolution.blockers);
+    for (const resource of compiled.resources.filter((entry) => entry.kind === "package")) {
+      // Per-package recursive schema, identical to host activation, not unrelated
+      // workspace declarations that would unnecessarily invalidate build caches.
+      const candidate = await compileCapabilityResourceRepository({
+        rootDirectory: resource.directory,
+        kind: "package",
+        source: resource.source,
+        resolveResource,
+      });
+      const schema = path.join(temporary, "bindings.json");
+      await fs.writeFile(
+        schema,
+        JSON.stringify(
+          specializeBindingSchema(bindingSchema(candidate), compiled.workspace, candidate.resource.revision.revisionId),
+        ),
+      );
+      const artifactPath = await buildCheckedPackage(
+        resource.directory,
+        schema,
+        candidate.resource.revision.revisionId,
+      );
+      checks.push({ packageRevisionId: candidate.resource.revision.revisionId, artifactPath });
+    }
+    if ((await snapshotCommit(options.root)) !== commit)
+      throw new Error("Source changed during verification; run the check again");
+    const result = {
+      schemaVersion: 1,
+      candidateOnly: true,
+      activationEvidence: false,
+      commit,
+      evolution,
+      checks,
+      blockers,
+      note: "Checks the committed root and its exact locked dependencies. Resource edits must be verified and repinned before they enter this candidate. No publication or activation performed.",
+    };
+    await fs.writeFile(path.join(options.output, "candidate.json"), JSON.stringify(compiled.workspace, null, 2));
+    await fs.writeFile(path.join(options.output, "report.json"), JSON.stringify(result, null, 2));
+    return result;
+  } catch (error) {
+    const result = {
+      schemaVersion: 1,
+      candidateOnly: true,
+      activationEvidence: false,
+      commit,
+      checks,
+      blockers: [...blockers, error instanceof Error ? error.message : String(error)],
+    };
+    await fs.writeFile(path.join(options.output, "report.json"), JSON.stringify(result, null, 2));
+    return result;
+  } finally {
+    await fs.rm(temporary, { recursive: true, force: true });
+  }
+};

src/capability-language/checked-build.ts

@@ -0,0 +1,184 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+import { execFile as callback, spawn } from "node:child_process";
+import { createWriteStream } from "node:fs";
+import { promisify } from "node:util";
+import { fileURLToPath } from "node:url";
+const execFile = promisify(callback);
+const environment = () => ({ ...process.env, QUIXOS_JJ_NO_CHECKPOINT: "1", GIT_TERMINAL_PROMPT: "0" });
+export const checkerIdentity = () =>
+  process.env.QUIXOS_CHECK_GENERATOR ?? path.resolve(path.dirname(fileURLToPath(import.meta.url)), "../..");
+
+/** Checking snapshots jj, but never publishes or activates the working copy. */
+export async function snapshotCommit(root: string): Promise<string> {
+  const run = async (...args: string[]) =>
+    (await execFile("jj", args, { cwd: root, env: environment() })).stdout.trim();
+  await run("status");
+  // jj resolve --list exits 1 on a clean revision. Query structured revision
+  // metadata instead of depending on diagnostic wording or swallowing errors.
+  if ((await run("--ignore-working-copy", "log", "--no-graph", "-r", "@", "-T", "conflict")) !== "false")
+    throw new Error("Resolve source conflicts before verification");
+  const commit = await run("--ignore-working-copy", "log", "--no-graph", "-r", "@", "-T", "commit_id");
+  if (!/^(?:[a-f0-9]{40}|[a-f0-9]{64})$/.test(commit)) throw new Error("Verification requires an exact jj commit");
+  await execFile("git", ["diff", "--exit-code", "--no-ext-diff", "--no-textconv", commit, "--"], {
+    cwd: root,
+    env: environment(),
+  });
+  const { stdout } = await execFile("git", ["ls-files", "--others", "--exclude-standard", "-z"], { cwd: root });
+  if (stdout) throw new Error("Source contains files not captured by jj; inspect jj tracking before verification");
+  return commit;
+}
+
+/** Use Git's actual committed tree, never dirty overlays labelled as old pins. */
+export async function checkoutCommit(root: string, commit: string, destination: string) {
+  await fs.mkdir(destination, { recursive: true });
+  const archive = await execFile("git", ["archive", "--format=tar", commit], {
+    cwd: root,
+    encoding: "buffer",
+    maxBuffer: 128 * 1024 * 1024,
+  });
+  await new Promise<void>((resolve, reject) => {
+    const child = spawn("tar", ["-xf", "-", "-C", destination], { stdio: ["pipe", "ignore", "pipe"] });
+    let error = "";
+    child.stderr.on("data", (chunk) => {
+      error += chunk;
+    });
+    child.on("error", reject);
+    child.on("close", (code) =>
+      code === 0 ? resolve() : reject(new Error(`Cannot extract committed source: ${error}`)),
+    );
+    child.stdin.on("error", reject);
+    child.stdin.end(archive.stdout);
+  });
+}
+
+/** Shared by provisional checks, template publication and host activation.
+ * The Nix derivation is the cached check; its metadata is internal provenance,
+ * not a certificate authored or approved by the workspace agent.
+ */
+export async function buildCheckedPackage(source: string, schema: string, packageRevisionId: string): Promise<string> {
+  const generator =
+    process.env.QUIXOS_CHECK_GENERATOR ?? path.resolve(path.dirname(fileURLToPath(import.meta.url)), "../..");
+  if (!/^\/nix\/store\/[^/]+$/.test(generator))
+    throw new Error("Run verification with the installed Quixos tooling (its exact Nix checker is required)");
+  const builder = path.join(generator, "share/checked-package.nix");
+  await fs.access(builder);
+  return await new Promise((resolve, reject) => {
+    const child = spawn(
+      "nix",
+      [
+        "build",
+        "--impure",
+        "--file",
+        builder,
+        "--argstr",
+        "source",
+        source,
+        "--argstr",
+        "schema",
+        schema,
+        "--argstr",
+        "generator",
+        generator,
+        "--argstr",
+        "packageRevisionId",
+        packageRevisionId,
+        "--no-link",
+        "--print-out-paths",
+        "-L",
+      ],
+      { env: environment(), stdio: ["ignore", "pipe", "inherit"] },
+    );
+    let output = "";
+    child.stdout.on("data", (chunk) => {
+      output += chunk;
+    });
+    child.on("error", reject);
+    child.on("close", (code) => {
+      const artifact = output.trim();
+      if (code !== 0 || !/^\/nix\/store\/[a-z0-9]{32}-[^\s/]+$/.test(artifact))
+        reject(new Error(`Checked Nix build failed (${code}); see build diagnostics above`));
+      else resolve(artifact);
+    });
+  });
+}
+
+/** Exact remote source DAG; the Nix checker owns schema construction and all
+ * nested fetches. Keep build noise in a named log, with a bounded failure tail. */
+export async function buildImmutableCandidate(
+  source: { repository: string; commit: string },
+  kind: "workspace" | "interface" | "package",
+  logFile: string,
+  contractOnly = false,
+): Promise<string> {
+  if (!/^(?:[a-f0-9]{40}|[a-f0-9]{64})$/.test(source.commit))
+    throw new Error("An immutable candidate requires an exact commit");
+  const url = new URL(source.repository);
+  if (url.protocol !== "https:" || url.username || url.password || url.search || url.hash)
+    throw new Error("Candidate origin must be credential-free HTTPS");
+  const generator =
+    process.env.QUIXOS_CHECK_GENERATOR ?? path.resolve(path.dirname(fileURLToPath(import.meta.url)), "../..");
+  if (!/^\/nix\/store\/[^/]+$/.test(generator)) throw new Error("Use the installed Quixos checker");
+  const builder = path.join(generator, "share/checked-candidate.nix");
+  await fs.access(builder);
+  const log = createWriteStream(logFile, { flags: "wx", mode: 0o600 });
+  await new Promise<void>((resolve, reject) => {
+    log.once("open", () => resolve());
+    log.once("error", reject);
+  });
+  return await new Promise((resolve, reject) => {
+    let output = "",
+      tail = "",
+      failure: Error | undefined;
+    const child = spawn(
+      "nix",
+      [
+        "build",
+        "--impure",
+        "--file",
+        builder,
+        "--argstr",
+        "repository",
+        source.repository,
+        "--argstr",
+        "commit",
+        source.commit,
+        "--argstr",
+        "kind",
+        kind,
+        "--argstr",
+        "generator",
+        generator,
+        "--arg",
+        "contractOnly",
+        contractOnly ? "true" : "false",
+        "--no-link",
+        "--print-out-paths",
+        "-L",
+      ],
+      { env: environment(), stdio: ["ignore", "pipe", "pipe"] },
+    );
+    log.on("error", (error) => {
+      failure = error;
+      child.kill();
+    });
+    child.stdout.on("data", (chunk) => {
+      output += chunk;
+    });
+    child.stderr.on("data", (chunk) => {
+      log.write(chunk);
+      tail = (tail + String(chunk)).slice(-6000);
+    });
+    child.on("error", (error) => {
+      failure = error;
+    });
+    child.on("close", (code) =>
+      log.end(() => {
+        if (failure) reject(failure);
+        else if (code !== 0 || !/^\/nix\/store\/[a-z0-9]{32}-[^\s/]+$/.test(output.trim()))
+          reject(new Error(`Candidate Nix check failed (${code}). Full log: ${logFile}\n${tail}`));
+        else resolve(output.trim());
+      }),
+    );
+  });
+}

src/capability-language/cli.ts

@@ -2,21 +2,23 @@
 
 import { readFile } from "node:fs/promises";
 import process from "node:process";
-import { compileCapabilitySource } from "./parser.js";
+import { compileCapabilityResourceSource, compileCapabilitySource } from "./parser.js";
 import { capabilityId } from "../capability-model/types.js";
 import { compileWorkspaceRevision } from "../capability-model/validation.js";
 
-const usage = `usage: quixos-capability-compile [--check]
+const usage = `usage: quixos-capability-compile [--check] [--resource]
        [--workspace-id ID] [--workspace-revision-id ID]
        [--source-root-commit GIT_REV] <workspace.qx | ->
 
-Parses, lowers, and validates a Quixos capability workspace. By default the
+Parses, lowers, and validates a Quixos capability workspace. --resource instead
-checked semantic workspace revision is written as JSON. --check emits no JSON.
+expects one standalone interface or package document. By default the checked
+semantic workspace revision or resource is written as JSON. --check emits no JSON.
 The identity overrides instantiate a checked built-in/template assembly for one
 real workspace; both must be supplied together.`;
 
 const parseArgs = (args: string[]) => {
   let checkOnly = false;
+  let resource = false;
   let workspaceId: string | undefined;
   let workspaceRevisionId: string | undefined;
   let sourceRootCommit: string | undefined;
@@ -24,6 +26,7 @@ const parseArgs = (args: string[]) => {
   for (let index = 0; index < args.length; index += 1) {
     const argument = args[index]!;
     if (argument === "--check") checkOnly = true;
+    else if (argument === "--resource") resource = true;
     else if (argument === "--workspace-id") workspaceId = args[++index];
     else if (argument === "--workspace-revision-id") workspaceRevisionId = args[++index];
     else if (argument === "--source-root-commit") sourceRootCommit = args[++index];
@@ -31,10 +34,14 @@ const parseArgs = (args: string[]) => {
     else if (argument.startsWith("-")) throw new Error(usage);
     else positional.push(argument);
   }
-  if (positional.length !== 1 || Boolean(workspaceId) !== Boolean(workspaceRevisionId)) {
+  if (
+    positional.length !== 1 ||
+    Boolean(workspaceId) !== Boolean(workspaceRevisionId) ||
+    (resource && Boolean(workspaceId || workspaceRevisionId || sourceRootCommit))
+  ) {
     throw new Error(usage);
   }
-  return { checkOnly, workspaceId, workspaceRevisionId, sourceRootCommit, fileName: positional[0]! };
+  return { checkOnly, resource, workspaceId, workspaceRevisionId, sourceRootCommit, fileName: positional[0]! };
 };
 
 const main = async () => {
@@ -43,13 +50,7 @@ const main = async () => {
     process.stdout.write(`${usage}\n`);
     return;
   }
-  const {
+  const { checkOnly, resource, workspaceId, workspaceRevisionId, sourceRootCommit, fileName } = parseArgs(args);
-    checkOnly,
-    workspaceId,
-    workspaceRevisionId,
-    sourceRootCommit,
-    fileName,
-  } = parseArgs(args);
   const source =
     fileName === "-"
       ? await new Promise<string>((resolve, reject) => {
@@ -59,27 +60,54 @@ const main = async () => {
           process.stdin.on("error", reject);
         })
       : await readFile(fileName, "utf8");
-  const result = compileCapabilitySource(source, fileName);
+  const reportDiagnostics = (
-  if (!result.ok) {
+    diagnostics: readonly {
-    for (const diagnostic of result.diagnostics) {
+      fileName: string;
+      line: number;
+      column: number;
+      phase: string;
+      code: string;
+      message: string;
+      path?: string;
+    }[],
+  ) => {
+    for (const diagnostic of diagnostics) {
       const location = diagnostic.line
         ? `${diagnostic.fileName}:${diagnostic.line}:${diagnostic.column + 1}`
         : `${diagnostic.fileName}${diagnostic.path ? `:${diagnostic.path}` : ""}`;
-      process.stderr.write(
+      process.stderr.write(`${location}: ${diagnostic.phase} ${diagnostic.code}: ${diagnostic.message}\n`);
-        `${location}: ${diagnostic.phase} ${diagnostic.code}: ${diagnostic.message}\n`,
-      );
     }
     process.exitCode = 1;
+  };
+  if (resource) {
+    const result = compileCapabilityResourceSource(source, {
+      source: {
+        repository: "https://compiler.invalid/resource.git",
+        commit: "0000000000000000000000000000000000000000",
+      },
+      fileName,
+    });
+    if (!result.ok) {
+      reportDiagnostics(result.diagnostics);
+      return;
+    }
+    if (!checkOnly) process.stdout.write(`${JSON.stringify(result.resource, null, 2)}\n`);
     return;
   }
-  const workspace = workspaceId && workspaceRevisionId
+  const result = compileCapabilitySource(source, fileName);
-    ? {
+  if (!result.ok) {
-        ...result.workspace,
+    reportDiagnostics(result.diagnostics);
-        workspaceId: capabilityId.workspace(workspaceId),
+    return;
-        id: capabilityId.workspaceRevision(workspaceRevisionId),
+  }
-        ...(sourceRootCommit ? { sourceRootCommit } : {}),
+  const workspace =
-      }
+    workspaceId && workspaceRevisionId
-    : { ...result.workspace, ...(sourceRootCommit ? { sourceRootCommit } : {}) };
+      ? {
+          ...result.workspace,
+          workspaceId: capabilityId.workspace(workspaceId),
+          id: capabilityId.workspaceRevision(workspaceRevisionId),
+          ...(sourceRootCommit ? { sourceRootCommit } : {}),
+        }
+      : { ...result.workspace, ...(sourceRootCommit ? { sourceRootCommit } : {}) };
   const instantiated = compileWorkspaceRevision(workspace);
   if (!instantiated.ok) {
     throw new Error(instantiated.issues.map((issue) => `${issue.path}: ${issue.message}`).join("\n"));

src/capability-language/file-lock.ts

@@ -0,0 +1,54 @@
+import { spawn } from "node:child_process";
+
+/** Kernel-owned lock: a crashed coordinator cannot leave a stale ownership file.
+ * The persistent file is just an inode; EOF releases the helper's lock. */
+export async function withFileLock<T>(filename: string, work: () => Promise<T>): Promise<T> {
+  const child = spawn(
+    "flock",
+    [
+      "--exclusive",
+      "--timeout",
+      "120",
+      "--conflict-exit-code",
+      "75",
+      filename,
+      process.execPath,
+      "-e",
+      'process.stdout.write("locked\\n"); process.stdin.resume();',
+    ],
+    { stdio: ["pipe", "pipe", "pipe"] },
+  );
+  let diagnostics = "";
+  child.stdin.on("error", () => {
+    /* acquisition/exit handling reports helper failure */
+  });
+  child.stderr.on("data", (chunk) => {
+    diagnostics = (diagnostics + String(chunk)).slice(-2000);
+  });
+  const closed = new Promise<void>((resolve) => {
+    child.once("close", () => resolve());
+  });
+  try {
+    await new Promise<void>((resolve, reject) => {
+      let output = "";
+      child.once("error", reject);
+      child.once("exit", (code) =>
+        reject(
+          new Error(
+            code === 75
+              ? "Timed out after 120 seconds waiting for another authoring command; inspect that command before retrying"
+              : `Cannot acquire authoring lock: ${diagnostics}`,
+          ),
+        ),
+      );
+      child.stdout.on("data", (chunk) => {
+        output += chunk;
+        if (output.includes("locked\n")) resolve();
+      });
+    });
+    return await work();
+  } finally {
+    child.stdin.end();
+    await closed;
+  }
+}

src/capability-language/generated/QuixosCapability.tokens

@@ -1,197 +1,229 @@
 WORKSPACE=1
-IMPORT=2
+TYPE=2
-EXTERNAL=3
+OBJECT=3
-ATOM=4
+STORABLE=4
-INTERFACE=5
+IMPLEMENTS=5
-INTERFACES=6
+REF=6
-PACKAGE=7
+FRAGMENT=7
-VALUE=8
+IMPORT=8
-RELATION=9
+EXTERNAL=9
-OPERATION=10
+ATOM=10
-FUNCTION=11
+INTERFACE=11
-CONSTRUCTOR=12
+INTERFACES=12
-CONSTRUCTS=13
+PACKAGE=13
-CONFORM=14
+VALUE=14
-AS=15
+RELATION=15
-BIND=16
+OPERATION=16
-TO=17
+FUNCTION=17
-PRIVATE=18
+CONSTRUCTOR=18
-SHARED=19
+CONSTRUCTS=19
-STATE=20
+INPUT=20
-EDGE=21
+CONFORM=21
-PROJECTION=22
+AS=22
-WITH=23
+BIND=23
-USING=24
+STATIC=24
-VIA=25
+TO=25
-MATERIALIZE=26
+PRIVATE=26
-IF=27
+SHARED=27
-ABSENT=28
+STATE=28
-ON=29
+EDGE=29
-POLICY=30
+PROJECTION=30
-DEFAULT=31
+WITH=31
-SOURCE=32
+USING=32
-REPOSITORY=33
+VIA=33
-COMMIT=34
+MATERIALIZE=34
-REVISION=35
+IF=35
-ID=36
+ABSENT=36
-DOC=37
+ON=37
-MODE=38
+POLICY=38
-EMITS=39
+DEFAULT=39
-RECEIVER=40
+SOURCE=40
-REQUIRES=41
+REPOSITORY=41
-ANY=42
+COMMIT=42
-GET=43
+REVISION=43
-SET=44
+SEMANTIC_MAJOR=44
-WATCH=45
+ON_DELETE=45
-START=46
+RETAIN_OTHER=46
-STOP=47
+KEYED=47
-READ=48
+PUBLIC_TRAVERSAL=48
-WRITE=49
+ID=49
-RESOLVE=50
+DOC=50
-CONNECT=51
+MODE=51
-DISCONNECT=52
+EMITS=52
-CALL=53
+RECEIVER=53
-WATCH_START=54
+REQUIRES=54
-WATCH_STOP=55
+ANY=55
-SUBSCRIBE=56
+GET=56
-UNSUBSCRIBE=57
+SET=57
-OPTIMISTIC_REGISTER=58
+WATCH=58
-CRDT=59
+START=59
-OPTIONAL_ONE=60
+STOP=60
-EXACTLY_ONE=61
+READ=61
-MANY_UNIQUE=62
+WRITE=62
-MANY=63
+RESOLVE=63
-ORDERED=64
+CONNECT=64
-UNIT=65
+DISCONNECT=65
-WATCH_HANDLE=66
+CALL=66
-MESSAGE=67
+WATCH_START=67
-ATOM_REF=68
+WATCH_STOP=68
-INTERFACE_REF=69
+SUBSCRIBE=69
-OPTIONAL=70
+UNSUBSCRIBE=70
-LIST=71
+OPTIMISTIC_REGISTER=71
-BOOL=72
+CRDT=72
-BYTES=73
+OPTIONAL_ONE=73
-DOUBLE=74
+EXACTLY_ONE=74
-INT32=75
+MANY_UNIQUE=75
-INT64=76
+MANY=76
-STRING=77
+ORDERED=77
-UINT32=78
+UNIT=78
-UINT64=79
+WATCH_HANDLE=79
-TRUE=80
+MESSAGE=80
-FALSE=81
+ATOM_REF=81
-NULL=82
+INTERFACE_REF=82
-ARROW=83
+OPTIONAL=83
-COLON=84
+LIST=84
-SEMI=85
+RECORD=85
-COMMA=86
+BOOL=86
-DOT=87
+BYTES=87
-LBRACE=88
+DOUBLE=88
-RBRACE=89
+INT32=89
-LBRACK=90
+INT64=90
-RBRACK=91
+STRING=91
-LPAREN=92
+UINT32=92
-RPAREN=93
+UINT64=93
-LT=94
+TRUE=94
-GT=95
+FALSE=95
-INTEGER=96
+NULL=96
-JSON_NUMBER=97
+ARROW=97
-IDENTIFIER=98
+COLON=98
-STRING_LITERAL=99
+SEMI=99
-LINE_COMMENT=100
+COMMA=100
-BLOCK_COMMENT=101
+DOT=101
-WS=102
+LBRACE=102
+RBRACE=103
+LBRACK=104
+RBRACK=105
+LPAREN=106
+RPAREN=107
+LT=108
+GT=109
+AMP=110
+EQUAL=111
+INTEGER=112
+JSON_NUMBER=113
+IDENTIFIER=114
+STRING_LITERAL=115
+LINE_COMMENT=116
+BLOCK_COMMENT=117
+WS=118
 'workspace'=1
-'import'=2
+'type'=2
-'external'=3
+'object'=3
-'atom'=4
+'storable'=4
-'interface'=5
+'implements'=5
-'interfaces'=6
+'ref'=6
-'package'=7
+'fragment'=7
-'value'=8
+'import'=8
-'relation'=9
+'external'=9
-'operation'=10
+'atom'=10
-'function'=11
+'interface'=11
-'constructor'=12
+'interfaces'=12
-'constructs'=13
+'package'=13
-'conform'=14
+'value'=14
-'as'=15
+'relation'=15
-'bind'=16
+'operation'=16
-'to'=17
+'function'=17
-'private'=18
+'constructor'=18
-'shared'=19
+'constructs'=19
-'state'=20
+'input'=20
-'edge'=21
+'conform'=21
-'projection'=22
+'as'=22
-'with'=23
+'bind'=23
-'using'=24
+'static'=24
-'via'=25
+'to'=25
-'materialize'=26
+'private'=26
-'if'=27
+'shared'=27
-'absent'=28
+'state'=28
-'on'=29
+'edge'=29
-'policy'=30
+'projection'=30
-'default'=31
+'with'=31
-'source'=32
+'using'=32
-'repository'=33
+'via'=33
-'commit'=34
+'materialize'=34
-'revision'=35
+'if'=35
-'id'=36
+'absent'=36
-'doc'=37
+'on'=37
-'mode'=38
+'policy'=38
-'emits'=39
+'default'=39
-'receiver'=40
+'source'=40
-'requires'=41
+'repository'=41
-'any'=42
+'commit'=42
-'get'=43
+'revision'=43
-'set'=44
+'semantic-major'=44
-'watch'=45
+'on-delete'=45
-'start'=46
+'retain-other'=46
-'stop'=47
+'keyed'=47
-'read'=48
+'public-traversal'=48
-'write'=49
+'id'=49
-'resolve'=50
+'doc'=50
-'connect'=51
+'mode'=51
-'disconnect'=52
+'emits'=52
-'call'=53
+'receiver'=53
-'watch-start'=54
+'requires'=54
-'watch-stop'=55
+'any'=55
-'subscribe'=56
+'get'=56
-'unsubscribe'=57
+'set'=57
-'optimistic-register'=58
+'watch'=58
-'crdt'=59
+'start'=59
-'optional-one'=60
+'stop'=60
-'exactly-one'=61
+'read'=61
-'many-unique'=62
+'write'=62
-'many'=63
+'resolve'=63
-'ordered'=64
+'connect'=64
-'unit'=65
+'disconnect'=65
-'watch-handle'=66
+'call'=66
-'message'=67
+'watch-start'=67
-'atom-ref'=68
+'watch-stop'=68
-'interface-ref'=69
+'subscribe'=69
-'optional'=70
+'unsubscribe'=70
-'list'=71
+'optimistic-register'=71
-'bool'=72
+'crdt'=72
-'bytes'=73
+'optional-one'=73
-'double'=74
+'exactly-one'=74
-'int32'=75
+'many-unique'=75
-'int64'=76
+'many'=76
-'string'=77
+'ordered'=77
-'uint32'=78
+'unit'=78
-'uint64'=79
+'watch-handle'=79
-'true'=80
+'message'=80
-'false'=81
+'atom-ref'=81
-'null'=82
+'interface-ref'=82
-'->'=83
+'optional'=83
-':'=84
+'list'=84
-';'=85
+'record'=85
-','=86
+'bool'=86
-'.'=87
+'bytes'=87
-'{'=88
+'double'=88
-'}'=89
+'int32'=89
-'['=90
+'int64'=90
-']'=91
+'string'=91
-'('=92
+'uint32'=92
-')'=93
+'uint64'=93
-'<'=94
+'true'=94
-'>'=95
+'false'=95
+'null'=96
+'->'=97
+':'=98
+';'=99
+','=100
+'.'=101
+'{'=102
+'}'=103
+'['=104
+']'=105
+'('=106
+')'=107
+'<'=108
+'>'=109
+'&'=110
+'='=111

src/capability-language/generated/QuixosCapabilityLexer.tokens

@@ -1,197 +1,229 @@
 WORKSPACE=1
-IMPORT=2
+TYPE=2
-EXTERNAL=3
+OBJECT=3
-ATOM=4
+STORABLE=4
-INTERFACE=5
+IMPLEMENTS=5
-INTERFACES=6
+REF=6
-PACKAGE=7
+FRAGMENT=7
-VALUE=8
+IMPORT=8
-RELATION=9
+EXTERNAL=9
-OPERATION=10
+ATOM=10
-FUNCTION=11
+INTERFACE=11
-CONSTRUCTOR=12
+INTERFACES=12
-CONSTRUCTS=13
+PACKAGE=13
-CONFORM=14
+VALUE=14
-AS=15
+RELATION=15
-BIND=16
+OPERATION=16
-TO=17
+FUNCTION=17
-PRIVATE=18
+CONSTRUCTOR=18
-SHARED=19
+CONSTRUCTS=19
-STATE=20
+INPUT=20
-EDGE=21
+CONFORM=21
-PROJECTION=22
+AS=22
-WITH=23
+BIND=23
-USING=24
+STATIC=24
-VIA=25
+TO=25
-MATERIALIZE=26
+PRIVATE=26
-IF=27
+SHARED=27
-ABSENT=28
+STATE=28
-ON=29
+EDGE=29
-POLICY=30
+PROJECTION=30
-DEFAULT=31
+WITH=31
-SOURCE=32
+USING=32
-REPOSITORY=33
+VIA=33
-COMMIT=34
+MATERIALIZE=34
-REVISION=35
+IF=35
-ID=36
+ABSENT=36
-DOC=37
+ON=37
-MODE=38
+POLICY=38
-EMITS=39
+DEFAULT=39
-RECEIVER=40
+SOURCE=40
-REQUIRES=41
+REPOSITORY=41
-ANY=42
+COMMIT=42
-GET=43
+REVISION=43
-SET=44
+SEMANTIC_MAJOR=44
-WATCH=45
+ON_DELETE=45
-START=46
+RETAIN_OTHER=46
-STOP=47
+KEYED=47
-READ=48
+PUBLIC_TRAVERSAL=48
-WRITE=49
+ID=49
-RESOLVE=50
+DOC=50
-CONNECT=51
+MODE=51
-DISCONNECT=52
+EMITS=52
-CALL=53
+RECEIVER=53
-WATCH_START=54
+REQUIRES=54
-WATCH_STOP=55
+ANY=55
-SUBSCRIBE=56
+GET=56
-UNSUBSCRIBE=57
+SET=57
-OPTIMISTIC_REGISTER=58
+WATCH=58
-CRDT=59
+START=59
-OPTIONAL_ONE=60
+STOP=60
-EXACTLY_ONE=61
+READ=61
-MANY_UNIQUE=62
+WRITE=62
-MANY=63
+RESOLVE=63
-ORDERED=64
+CONNECT=64
-UNIT=65
+DISCONNECT=65
-WATCH_HANDLE=66
+CALL=66
-MESSAGE=67
+WATCH_START=67
-ATOM_REF=68
+WATCH_STOP=68
-INTERFACE_REF=69
+SUBSCRIBE=69
-OPTIONAL=70
+UNSUBSCRIBE=70
-LIST=71
+OPTIMISTIC_REGISTER=71
-BOOL=72
+CRDT=72
-BYTES=73
+OPTIONAL_ONE=73
-DOUBLE=74
+EXACTLY_ONE=74
-INT32=75
+MANY_UNIQUE=75
-INT64=76
+MANY=76
-STRING=77
+ORDERED=77
-UINT32=78
+UNIT=78
-UINT64=79
+WATCH_HANDLE=79
-TRUE=80
+MESSAGE=80
-FALSE=81
+ATOM_REF=81
-NULL=82
+INTERFACE_REF=82
-ARROW=83
+OPTIONAL=83
-COLON=84
+LIST=84
-SEMI=85
+RECORD=85
-COMMA=86
+BOOL=86
-DOT=87
+BYTES=87
-LBRACE=88
+DOUBLE=88
-RBRACE=89
+INT32=89
-LBRACK=90
+INT64=90
-RBRACK=91
+STRING=91
-LPAREN=92
+UINT32=92
-RPAREN=93
+UINT64=93
-LT=94
+TRUE=94
-GT=95
+FALSE=95
-INTEGER=96
+NULL=96
-JSON_NUMBER=97
+ARROW=97
-IDENTIFIER=98
+COLON=98
-STRING_LITERAL=99
+SEMI=99
-LINE_COMMENT=100
+COMMA=100
-BLOCK_COMMENT=101
+DOT=101
-WS=102
+LBRACE=102
+RBRACE=103
+LBRACK=104
+RBRACK=105
+LPAREN=106
+RPAREN=107
+LT=108
+GT=109
+AMP=110
+EQUAL=111
+INTEGER=112
+JSON_NUMBER=113
+IDENTIFIER=114
+STRING_LITERAL=115
+LINE_COMMENT=116
+BLOCK_COMMENT=117
+WS=118
 'workspace'=1
-'import'=2
+'type'=2
-'external'=3
+'object'=3
-'atom'=4
+'storable'=4
-'interface'=5
+'implements'=5
-'interfaces'=6
+'ref'=6
-'package'=7
+'fragment'=7
-'value'=8
+'import'=8
-'relation'=9
+'external'=9
-'operation'=10
+'atom'=10
-'function'=11
+'interface'=11
-'constructor'=12
+'interfaces'=12
-'constructs'=13
+'package'=13
-'conform'=14
+'value'=14
-'as'=15
+'relation'=15
-'bind'=16
+'operation'=16
-'to'=17
+'function'=17
-'private'=18
+'constructor'=18
-'shared'=19
+'constructs'=19
-'state'=20
+'input'=20
-'edge'=21
+'conform'=21
-'projection'=22
+'as'=22
-'with'=23
+'bind'=23
-'using'=24
+'static'=24
-'via'=25
+'to'=25
-'materialize'=26
+'private'=26
-'if'=27
+'shared'=27
-'absent'=28
+'state'=28
-'on'=29
+'edge'=29
-'policy'=30
+'projection'=30
-'default'=31
+'with'=31
-'source'=32
+'using'=32
-'repository'=33
+'via'=33
-'commit'=34
+'materialize'=34
-'revision'=35
+'if'=35
-'id'=36
+'absent'=36
-'doc'=37
+'on'=37
-'mode'=38
+'policy'=38
-'emits'=39
+'default'=39
-'receiver'=40
+'source'=40
-'requires'=41
+'repository'=41
-'any'=42
+'commit'=42
-'get'=43
+'revision'=43
-'set'=44
+'semantic-major'=44
-'watch'=45
+'on-delete'=45
-'start'=46
+'retain-other'=46
-'stop'=47
+'keyed'=47
-'read'=48
+'public-traversal'=48
-'write'=49
+'id'=49
-'resolve'=50
+'doc'=50
-'connect'=51
+'mode'=51
-'disconnect'=52
+'emits'=52
-'call'=53
+'receiver'=53
-'watch-start'=54
+'requires'=54
-'watch-stop'=55
+'any'=55
-'subscribe'=56
+'get'=56
-'unsubscribe'=57
+'set'=57
-'optimistic-register'=58
+'watch'=58
-'crdt'=59
+'start'=59
-'optional-one'=60
+'stop'=60
-'exactly-one'=61
+'read'=61
-'many-unique'=62
+'write'=62
-'many'=63
+'resolve'=63
-'ordered'=64
+'connect'=64
-'unit'=65
+'disconnect'=65
-'watch-handle'=66
+'call'=66
-'message'=67
+'watch-start'=67
-'atom-ref'=68
+'watch-stop'=68
-'interface-ref'=69
+'subscribe'=69
-'optional'=70
+'unsubscribe'=70
-'list'=71
+'optimistic-register'=71
-'bool'=72
+'crdt'=72
-'bytes'=73
+'optional-one'=73
-'double'=74
+'exactly-one'=74
-'int32'=75
+'many-unique'=75
-'int64'=76
+'many'=76
-'string'=77
+'ordered'=77
-'uint32'=78
+'unit'=78
-'uint64'=79
+'watch-handle'=79
-'true'=80
+'message'=80
-'false'=81
+'atom-ref'=81
-'null'=82
+'interface-ref'=82
-'->'=83
+'optional'=83
-':'=84
+'list'=84
-';'=85
+'record'=85
-','=86
+'bool'=86
-'.'=87
+'bytes'=87
-'{'=88
+'double'=88
-'}'=89
+'int32'=89
-'['=90
+'int64'=90
-']'=91
+'string'=91
-'('=92
+'uint32'=92
-')'=93
+'uint64'=93
-'<'=94
+'true'=94
-'>'=95
+'false'=95
+'null'=96
+'->'=97
+':'=98
+';'=99
+','=100
+'.'=101
+'{'=102
+'}'=103
+'['=104
+']'=105
+'('=106
+')'=107
+'<'=108
+'>'=109
+'&'=110
+'='=111

src/capability-language/generated/QuixosCapabilityVisitor.ts

@@ -3,6 +3,8 @@ import { AbstractParseTreeVisitor } from "antlr4ng";
 
 
 import { DocumentContext } from "./QuixosCapabilityParser.js";
+import { FragmentDeclContext } from "./QuixosCapabilityParser.js";
+import { SourceImportDeclContext } from "./QuixosCapabilityParser.js";
 import { WorkspaceDeclContext } from "./QuixosCapabilityParser.js";
 import { WorkspaceItemContext } from "./QuixosCapabilityParser.js";
 import { ResourceImportDeclContext } from "./QuixosCapabilityParser.js";
@@ -11,6 +13,12 @@ import { ExternalInterfaceDeclContext } from "./QuixosCapabilityParser.js";
 import { ResourcePreambleContext } from "./QuixosCapabilityParser.js";
 import { AtomDeclContext } from "./QuixosCapabilityParser.js";
 import { InterfaceResourceDeclContext } from "./QuixosCapabilityParser.js";
+import { TypeParametersContext } from "./QuixosCapabilityParser.js";
+import { TypeParameterContext } from "./QuixosCapabilityParser.js";
+import { InterfaceTypeContext } from "./QuixosCapabilityParser.js";
+import { TypeArgumentsContext } from "./QuixosCapabilityParser.js";
+import { TypeArgumentContext } from "./QuixosCapabilityParser.js";
+import { TypeAliasDeclContext } from "./QuixosCapabilityParser.js";
 import { InterfaceMemberContext } from "./QuixosCapabilityParser.js";
 import { OperationMemberContext } from "./QuixosCapabilityParser.js";
 import { ValueMemberContext } from "./QuixosCapabilityParser.js";
@@ -39,6 +47,7 @@ import { EdgeDeclContext } from "./QuixosCapabilityParser.js";
 import { EdgeEndpointContext } from "./QuixosCapabilityParser.js";
 import { ConformanceDeclContext } from "./QuixosCapabilityParser.js";
 import { ConformanceItemContext } from "./QuixosCapabilityParser.js";
+import { StateFieldBindingDeclContext } from "./QuixosCapabilityParser.js";
 import { RelationshipMaterializationDeclContext } from "./QuixosCapabilityParser.js";
 import { OperationBindingDeclContext } from "./QuixosCapabilityParser.js";
 import { MemberOperationRefContext } from "./QuixosCapabilityParser.js";
@@ -50,6 +59,7 @@ import { DependencyBindingBlockContext } from "./QuixosCapabilityParser.js";
 import { DependencyBindingContext } from "./QuixosCapabilityParser.js";
 import { ConstructorBindingDeclContext } from "./QuixosCapabilityParser.js";
 import { ValueTypeContext } from "./QuixosCapabilityParser.js";
+import { RecordFieldContext } from "./QuixosCapabilityParser.js";
 import { ScalarTypeContext } from "./QuixosCapabilityParser.js";
 import { CardinalityContext } from "./QuixosCapabilityParser.js";
 import { JsonLiteralContext } from "./QuixosCapabilityParser.js";
@@ -74,6 +84,18 @@ export class QuixosCapabilityVisitor<Result> extends AbstractParseTreeVisitor<Re
      * @return the visitor result
      */
     visitDocument?: (ctx: DocumentContext) => Result;
+    /**
+     * Visit a parse tree produced by `QuixosCapabilityParser.fragmentDecl`.
+     * @param ctx the parse tree
+     * @return the visitor result
+     */
+    visitFragmentDecl?: (ctx: FragmentDeclContext) => Result;
+    /**
+     * Visit a parse tree produced by `QuixosCapabilityParser.sourceImportDecl`.
+     * @param ctx the parse tree
+     * @return the visitor result
+     */
+    visitSourceImportDecl?: (ctx: SourceImportDeclContext) => Result;
     /**
      * Visit a parse tree produced by `QuixosCapabilityParser.workspaceDecl`.
      * @param ctx the parse tree
@@ -122,6 +144,42 @@ export class QuixosCapabilityVisitor<Result> extends AbstractParseTreeVisitor<Re
      * @return the visitor result
      */
     visitInterfaceResourceDecl?: (ctx: InterfaceResourceDeclContext) => Result;
+    /**
+     * Visit a parse tree produced by `QuixosCapabilityParser.typeParameters`.
+     * @param ctx the parse tree
+     * @return the visitor result
+     */
+    visitTypeParameters?: (ctx: TypeParametersContext) => Result;
+    /**
+     * Visit a parse tree produced by `QuixosCapabilityParser.typeParameter`.
+     * @param ctx the parse tree
+     * @return the visitor result
+     */
+    visitTypeParameter?: (ctx: TypeParameterContext) => Result;
+    /**
+     * Visit a parse tree produced by `QuixosCapabilityParser.interfaceType`.
+     * @param ctx the parse tree
+     * @return the visitor result
+     */
+    visitInterfaceType?: (ctx: InterfaceTypeContext) => Result;
+    /**
+     * Visit a parse tree produced by `QuixosCapabilityParser.typeArguments`.
+     * @param ctx the parse tree
+     * @return the visitor result
+     */
+    visitTypeArguments?: (ctx: TypeArgumentsContext) => Result;
+    /**
+     * Visit a parse tree produced by `QuixosCapabilityParser.typeArgument`.
+     * @param ctx the parse tree
+     * @return the visitor result
+     */
+    visitTypeArgument?: (ctx: TypeArgumentContext) => Result;
+    /**
+     * Visit a parse tree produced by `QuixosCapabilityParser.typeAliasDecl`.
+     * @param ctx the parse tree
+     * @return the visitor result
+     */
+    visitTypeAliasDecl?: (ctx: TypeAliasDeclContext) => Result;
     /**
      * Visit a parse tree produced by `QuixosCapabilityParser.interfaceMember`.
      * @param ctx the parse tree
@@ -290,6 +348,12 @@ export class QuixosCapabilityVisitor<Result> extends AbstractParseTreeVisitor<Re
      * @return the visitor result
      */
     visitConformanceItem?: (ctx: ConformanceItemContext) => Result;
+    /**
+     * Visit a parse tree produced by `QuixosCapabilityParser.stateFieldBindingDecl`.
+     * @param ctx the parse tree
+     * @return the visitor result
+     */
+    visitStateFieldBindingDecl?: (ctx: StateFieldBindingDeclContext) => Result;
     /**
      * Visit a parse tree produced by `QuixosCapabilityParser.relationshipMaterializationDecl`.
      * @param ctx the parse tree
@@ -356,6 +420,12 @@ export class QuixosCapabilityVisitor<Result> extends AbstractParseTreeVisitor<Re
      * @return the visitor result
      */
     visitValueType?: (ctx: ValueTypeContext) => Result;
+    /**
+     * Visit a parse tree produced by `QuixosCapabilityParser.recordField`.
+     * @param ctx the parse tree
+     * @return the visitor result
+     */
+    visitRecordField?: (ctx: RecordFieldContext) => Result;
     /**
      * Visit a parse tree produced by `QuixosCapabilityParser.scalarType`.
      * @param ctx the parse tree

src/capability-language/generic-types.ts

@@ -0,0 +1,392 @@
+import {
+  TypeSubstitution,
+  GenericTypeError,
+  instantiateInterface,
+  appliedInterfaceId,
+  valueType,
+  type AtomId,
+  type ClosedTypeArgument,
+  type GenericTypeEnvironment,
+  type InterfaceApplicationExpression,
+  type InterfaceRevision,
+  type ObjectTypeExpression,
+  type TypeArgumentExpression,
+  type TypeParameter,
+  type ValueAliasDefinition,
+  type ValueType,
+  type ValueTypeExpression,
+} from "../capability-model/index.js";
+import type {
+  InterfaceTypeContext,
+  TargetConstraintContext,
+  TypeArgumentsContext,
+  TypeParametersContext,
+  TypeAliasDeclContext,
+  ValueTypeContext,
+} from "./generated/QuixosCapabilityParser.js";
+
+const literal = (context: { getText(): string }) => JSON.parse(context.getText()) as string;
+
+/** Lexical authoring scope; only `value`/`target` return installed types. */
+export class GenericSourceTypes {
+  readonly interfaces = new Map<string, InterfaceRevision>();
+  readonly definitions = new Map<string, InterfaceRevision>();
+  readonly applications = new Map<string, InterfaceRevision>();
+  readonly aliases = new Map<string, ValueAliasDefinition>();
+  parameters = new Map<string, TypeParameter>();
+  self?: AtomId;
+  private active: string[] = [];
+  private applicationCount = 0;
+
+  constructor(readonly atoms: Map<string, AtomId>) {}
+
+  environment(): GenericTypeEnvironment {
+    return {
+      arguments: new Map(),
+      aliases: this.aliases,
+      self: this.self,
+      applyInterface: (id, args) => this.apply(id, args).revisionId,
+      // Obligations are retained on the application and discharged by workspace
+      // validation, where all atom conformances are known (not source order).
+      implementsInterface: () => true,
+    };
+  }
+
+  register(name: string, definition: InterfaceRevision) {
+    this.interfaces.set(name, definition);
+    this.definitions.set(definition.revisionId, definition);
+  }
+
+  /** Check authored applications even when nobody has instantiated this template yet. */
+  validateTemplate(definition: InterfaceRevision) {
+    const template = definition.template;
+    if (!template) return;
+    const aliases = new Map((template.aliases ?? []).map((alias) => [alias.id, alias]));
+    const parametersById = new Map(
+      [...template.parameters, ...(template.aliases ?? []).flatMap((alias) => alias.parameters)].map((parameter) => [
+        parameter.id,
+        parameter,
+      ]),
+    );
+    const replace = (node: unknown, arguments_: Map<string, TypeArgumentExpression>): unknown => {
+      if (!node || typeof node !== "object") return node;
+      if ("kind" in node && node.kind === "parameter" && "parameterId" in node) {
+        const arg = arguments_.get(String(node.parameterId));
+        if (arg) return arg.kind === "value" ? arg.type : arg.target;
+      }
+      if (Array.isArray(node)) return node.map((entry) => replace(entry, arguments_));
+      return Object.fromEntries(Object.entries(node).map(([key, value]) => [key, replace(value, arguments_)]));
+    };
+    const implies = (
+      actual: InterfaceApplicationExpression,
+      required: InterfaceApplicationExpression,
+      seen = new Set<string>(),
+    ): boolean => {
+      const key = JSON.stringify(actual);
+      if (key === JSON.stringify(required)) return true;
+      if (seen.has(key) || seen.size > 128) return false;
+      seen.add(key);
+      const contract = this.definitions.get(actual.definitionId);
+      if (!contract?.template)
+        return (contract?.requiredInterfaces ?? []).includes(required.definitionId) && required.arguments.length === 0;
+      const args = new Map(
+        contract.template.parameters.map((parameter, index) => [parameter.id, actual.arguments[index]]),
+      );
+      return contract.template.requires.some((parent) =>
+        implies(replace(parent, args) as InterfaceApplicationExpression, required, seen),
+      );
+    };
+    const storable = (type: ValueTypeExpression, depth = 0): boolean => {
+      if (depth > 128)
+        throw new GenericTypeError(
+          "type-complexity-limit",
+          definition.displayName,
+          "Storable alias expansion exceeds depth limit",
+        );
+      if (type.kind === "parameter") {
+        const parameter = parametersById.get(type.parameterId);
+        return parameter?.kind === "value" && Boolean(parameter.storable);
+      }
+      if (type.kind === "list" || type.kind === "optional") return storable(type.value, depth + 1);
+      if (type.kind === "alias") {
+        const alias = aliases.get(type.definitionId);
+        if (!alias || alias.parameters.length !== type.arguments.length) return false;
+        return storable(
+          replace(
+            alias.body,
+            new Map(alias.parameters.map((parameter, index) => [parameter.id, type.arguments[index]])),
+          ) as ValueTypeExpression,
+          depth + 1,
+        );
+      }
+      return type.kind === "scalar" || (type.kind === "builtin" && type.name === "unit");
+    };
+    let remaining = 10000;
+    const visit = (node: unknown, path: string, depth = 0): void => {
+      if (depth > 128 || --remaining < 0)
+        throw new GenericTypeError("type-complexity-limit", path, "Type exceeds the depth or expansion budget");
+      if (!node || typeof node !== "object") return;
+      if ("definitionId" in node && "arguments" in node) {
+        const application = node as InterfaceApplicationExpression | Extract<ValueTypeExpression, { kind: "alias" }>;
+        const alias = "kind" in application && application.kind === "alias";
+        const target = alias ? aliases.get(application.definitionId) : this.definitions.get(application.definitionId);
+        if (!target)
+          throw new GenericTypeError(
+            alias ? "unknown-alias" : "unknown-interface",
+            path,
+            `Unknown definition ${application.definitionId}`,
+          );
+        if ("template" in target && target.template?.usesSelf) template.usesSelf = true;
+        const parameters = "parameters" in target ? target.parameters : (target.template?.parameters ?? []);
+        if (parameters.length !== application.arguments.length)
+          throw new GenericTypeError(
+            "type-arity",
+            path,
+            `Expected ${parameters.length} type arguments, received ${application.arguments.length}`,
+          );
+        parameters.forEach((parameter, index) => {
+          if (parameter.kind !== application.arguments[index].kind)
+            throw new GenericTypeError(
+              "parameter-kind",
+              path,
+              `Expected ${parameter.kind}, received ${application.arguments[index].kind}`,
+            );
+          const argument = application.arguments[index];
+          if (parameter.kind === "value" && parameter.storable && argument.kind === "value" && !storable(argument.type))
+            throw new GenericTypeError(
+              "non-storable-argument",
+              path,
+              "Generic application cannot prove its value argument is storable",
+            );
+          if (parameter.kind === "object" && argument.kind === "object" && argument.target.kind === "parameter") {
+            const offered = parametersById.get(argument.target.parameterId);
+            const mapping = new Map(parameters.map((p, i) => [p.id, application.arguments[i]]));
+            for (const bound of parameter.implements) {
+              const required = replace(bound, mapping) as InterfaceApplicationExpression;
+              if (offered?.kind !== "object" || !offered.implements.some((evidence) => implies(evidence, required)))
+                throw new GenericTypeError(
+                  "unsatisfied-bound",
+                  path,
+                  `Object parameter does not prove ${required.definitionId}`,
+                );
+            }
+          }
+        });
+      }
+      for (const [name, child] of Object.entries(node)) visit(child, `${path}.${name}`, depth + 1);
+    };
+    visit(template, definition.displayName);
+    const active = new Set<string>();
+    const done = new Set<string>();
+    const checkAlias = (id: string) => {
+      if (done.has(id)) return;
+      if (active.has(id))
+        throw new GenericTypeError("recursive-alias", id, `Recursive value alias: ${[...active, id].join(" -> ")}`);
+      active.add(id);
+      const walk = (node: unknown): void => {
+        if (!node || typeof node !== "object") return;
+        if ("kind" in node && node.kind === "alias")
+          checkAlias((node as ValueAliasDefinition["body"] & { definitionId: string }).definitionId);
+        Object.values(node).forEach(walk);
+      };
+      walk(aliases.get(id)?.body);
+      active.delete(id);
+      done.add(id);
+    };
+    for (const id of aliases.keys()) checkAlias(id);
+  }
+
+  apply(id: string, arguments_: readonly ClosedTypeArgument[]): InterfaceRevision {
+    const definition = this.definitions.get(id);
+    if (!definition) throw new GenericTypeError("unknown-interface", id, "Unknown interface definition");
+    const application = {
+      definitionId: definition.revisionId,
+      source: definition.source,
+      arguments: [...arguments_],
+      ...(definition.template?.usesSelf ? { self: this.self } : {}),
+    };
+    const appliedId = definition.template ? appliedInterfaceId(application) : definition.revisionId;
+    const cached = this.applications.get(appliedId);
+    if (cached) return cached;
+    if (this.active.includes(id))
+      throw new GenericTypeError(
+        "recursive-application",
+        id,
+        `Expanding recursive interface application: ${[...this.active, id].join(" -> ")}`,
+      );
+    if (++this.applicationCount > 10000)
+      throw new GenericTypeError("type-complexity-limit", id, "Too many interface applications");
+    this.active.push(id);
+    if (definition.template)
+      this.applications.set(appliedId, {
+        interfaceId: definition.interfaceId,
+        revisionId: appliedId,
+        displayName: definition.displayName,
+        source: definition.source,
+        members: [],
+        application,
+      });
+    try {
+      const obligations: NonNullable<InterfaceRevision["argumentRequirements"]> = [];
+      const instance = instantiateInterface(definition, arguments_, {
+        ...this.environment(),
+        implementsInterface: (target, required) => {
+          obligations.push({ target, required });
+          return true;
+        },
+      });
+      if (instance === definition) return definition;
+      instance.argumentRequirements = obligations;
+      this.applications.set(instance.revisionId, instance);
+      this.definitions.set(instance.revisionId, instance);
+      return instance;
+    } catch (error) {
+      this.applications.delete(appliedId);
+      throw error;
+    } finally {
+      this.active.pop();
+    }
+  }
+
+  interface(context: InterfaceTypeContext): InterfaceApplicationExpression {
+    return this.interfaceByName(context.identifier().getText(), context.typeArguments());
+  }
+
+  interfaceByName(name: string, arguments_: TypeArgumentsContext | null): InterfaceApplicationExpression {
+    const definition = this.interfaces.get(name);
+    if (!definition) throw new GenericTypeError("unknown-interface", name, "Unknown interface");
+    return { definitionId: definition.revisionId, arguments: this.arguments(arguments_) };
+  }
+
+  arguments(context: TypeArgumentsContext | null): TypeArgumentExpression[] {
+    return (context?.typeArgument() ?? []).map((argument): TypeArgumentExpression => {
+      if (argument.INTERFACE())
+        return {
+          kind: "object",
+          target: { kind: "application", application: this.interface(argument.interfaceType()!) },
+        };
+      if (argument.ATOM()) return { kind: "object", target: this.atom(argument.identifier()!.getText()) };
+      if (argument.OBJECT()) return { kind: "object", target: this.objectParameter(argument.identifier()!.getText()) };
+      const type = argument.valueType()!;
+      if (type.getText() === "Self") return { kind: "object", target: { kind: "self" } };
+      const parameter = type.identifier() && this.parameters.get(type.identifier()!.getText());
+      if (parameter?.kind === "object" && !type.typeArguments())
+        return { kind: "object", target: { kind: "parameter", parameterId: parameter.id } };
+      return { kind: "value", type: this.expression(type) };
+    });
+  }
+
+  private atom(name: string): ObjectTypeExpression {
+    if (name === "Self") return { kind: "self" };
+    const atomId = this.atoms.get(name);
+    if (!atomId) throw new GenericTypeError("unknown-atom", name, "Unknown atom");
+    return { kind: "atom", atomId };
+  }
+
+  private objectParameter(name: string): ObjectTypeExpression {
+    if (name === "Self") return { kind: "self" };
+    const parameter = this.parameters.get(name);
+    if (!parameter || parameter.kind !== "object")
+      throw new GenericTypeError("parameter-kind", name, "Expected an object parameter");
+    return { kind: "parameter", parameterId: parameter.id };
+  }
+
+  targetExpression(context: TargetConstraintContext): ObjectTypeExpression {
+    const name = context.identifier().getText();
+    if (context.ATOM()) return this.atom(name);
+    if (context.OBJECT()) return this.objectParameter(name);
+    return { kind: "application", application: this.interfaceByName(name, context.typeArguments()) };
+  }
+
+  expression(context: ValueTypeContext): ValueTypeExpression {
+    if (context.scalarType())
+      return {
+        kind: "scalar",
+        name: context.scalarType()!.getText() as Extract<ValueType, { kind: "scalar" }>["name"],
+      };
+    if (context.UNIT()) return valueType.unit;
+    if (context.WATCH_HANDLE()) return valueType.watchHandle;
+    if (context.MESSAGE()) return valueType.message(literal(context.stringLiteral()!));
+    if (context.OPTIONAL() || context.LIST())
+      return { kind: context.LIST() ? "list" : "optional", value: this.expression(context.valueType()!) };
+    if (context.RECORD()) {
+      const fields = context
+        .recordField()
+        .map((field) => [field.identifier().getText(), this.expression(field.valueType())] as const);
+      if (new Set(fields.map(([name]) => name)).size !== fields.length)
+        throw new GenericTypeError("duplicate-field", "record", "Duplicate record field");
+      return { kind: "record", fields: Object.fromEntries(fields) };
+    }
+    const name = context.identifier()!.getText();
+    if (context.ATOM_REF()) return { kind: "object-ref", expectation: this.atom(name) };
+    if (context.INTERFACE_REF())
+      return {
+        kind: "object-ref",
+        expectation: { kind: "application", application: this.interfaceByName(name, context.typeArguments()) },
+      };
+    if (context.REF()) return { kind: "object-ref", expectation: this.objectParameter(name) };
+    const parameter = this.parameters.get(name);
+    if (parameter) {
+      if (parameter.kind !== "value" || context.typeArguments())
+        throw new GenericTypeError("parameter-kind", name, "Expected a value parameter; object parameters need ref<T>");
+      return { kind: "parameter", parameterId: parameter.id };
+    }
+    if (!this.aliases.has(name)) throw new GenericTypeError("unknown-type", name, "Unknown value type");
+    return { kind: "alias", definitionId: name, arguments: this.arguments(context.typeArguments()) };
+  }
+
+  value(context: ValueTypeContext): ValueType {
+    return new TypeSubstitution(this.environment()).value(this.expression(context));
+  }
+
+  target(context: TargetConstraintContext) {
+    return new TypeSubstitution(this.environment()).object(this.targetExpression(context));
+  }
+
+  declareParameters(context: TypeParametersContext | null, owner: string): TypeParameter[] {
+    const entries = context?.typeParameter() ?? [];
+    const result: TypeParameter[] = entries.map((parameter, index) => {
+      const name = parameter.identifier().getText();
+      if (name === "Self" || this.parameters.has(name))
+        throw new GenericTypeError("duplicate-parameter", owner, `Duplicate or reserved parameter ${name}`);
+      const declaration: TypeParameter = parameter.VALUE()
+        ? {
+            id: `${owner}/parameter/${index}`,
+            name,
+            kind: "value",
+            ...(parameter.STORABLE() ? { storable: true } : {}),
+          }
+        : { id: `${owner}/parameter/${index}`, name, kind: "object", implements: [] };
+      this.parameters.set(name, declaration);
+      return declaration;
+    });
+    entries.forEach((entry, index) => {
+      const parameter = result[index];
+      if (parameter.kind === "object")
+        parameter.implements = entry.interfaceType().map((bound) => this.interface(bound));
+    });
+    return result;
+  }
+
+  declareAliases(contexts: readonly TypeAliasDeclContext[]) {
+    for (const context of contexts) {
+      const name = context.identifier().getText();
+      if (this.aliases.has(name)) throw new GenericTypeError("duplicate-alias", name, "Duplicate type alias");
+      this.aliases.set(name, { id: name, parameters: [], body: valueType.unit });
+    }
+    for (const context of contexts) {
+      const name = context.identifier().getText();
+      const previous = this.parameters;
+      this.parameters = new Map();
+      try {
+        this.aliases.set(name, {
+          id: name,
+          parameters: this.declareParameters(context.typeParameters(), JSON.stringify(["alias", name])),
+          body: this.expression(context.valueType()),
+        });
+      } finally {
+        this.parameters = previous;
+      }
+    }
+  }
+}

src/capability-language/git-resolver.ts

@@ -1,6 +1,6 @@
 import childProcess from "node:child_process";
 import crypto from "node:crypto";
-import { mkdir, readFile, realpath } from "node:fs/promises";
+import { mkdir, mkdtemp, readFile, realpath, rename, rm, stat } from "node:fs/promises";
 import path from "node:path";
 import { promisify } from "node:util";
 import type { CapabilityRepositoryResolver } from "./assembly.js";
@@ -22,6 +22,7 @@ const checkoutName = (kind: string, repository: string, commit: string) => {
 export const createGitCapabilityResolver = async (options: {
   checkoutRoot: string;
   snapshotMap?: string;
+  snapshotOnly?: boolean;
 }): Promise<CapabilityRepositoryResolver> => {
   await mkdir(options.checkoutRoot, { recursive: true });
   const checkoutRoot = await realpath(options.checkoutRoot);
@@ -52,35 +53,74 @@ export const createGitCapabilityResolver = async (options: {
     const key = sourceKey(kind, source.repository, source.commit);
     const snapshot = snapshots.get(key);
     if (snapshot) return { directory: snapshot };
+    if (options.snapshotOnly) throw new Error(`No offline snapshot for ${kind} ${source.repository}@${source.commit}`);
     const existing = checkouts.get(key);
     if (existing) return await existing;
     const pending = (async () => {
-      const directory = path.join(
+      const directory = path.join(checkoutRoot, checkoutName(kind, source.repository, source.commit));
-        checkoutRoot,
+      const verify = async (checkout: string) => {
-        checkoutName(kind, source.repository, source.commit),
+        const { stdout } = await execFile("git", ["-C", checkout, "rev-parse", "HEAD"]);
-      );
+        if (stdout.trim().toLowerCase() !== source.commit.toLowerCase()) {
-      await execFile("git", [
+          throw new Error(
-        "-c",
+            `Locked commit mismatch for ${source.repository}: wanted ${source.commit}, fetched ${stdout.trim()}`,
-        "advice.detachedHead=false",
+          );
-        "clone",
+        }
-        "--depth",
+        const { stdout: changes } = await execFile("git", [
-        "1",
+          "-C",
-        "--single-branch",
+          checkout,
-        "--branch",
+          "status",
-        `quixos-reachability/${source.commit.toLowerCase()}`,
+          "--porcelain",
-        source.repository,
+          "--untracked-files=all",
-        directory,
+        ]);
-      ]);
+        if (changes.trim()) throw new Error(`Dependency checkout was modified: ${checkout}`);
-      const { stdout } = await execFile("git", ["-C", directory, "rev-parse", "HEAD"]);
+      };
-      if (stdout.trim().toLowerCase() !== source.commit.toLowerCase()) {
+      // Only complete, checked clones become visible under the deterministic name.
-        throw new Error(
+      // Concurrent resolvers may fetch independently, but cannot observe a partial clone.
-          `Locked commit mismatch for ${source.repository}: ` +
+      if (
-          `wanted ${source.commit}, fetched ${stdout.trim()}`,
+        await stat(directory).then(
-        );
+          () => true,
+          (error: NodeJS.ErrnoException) => {
+            if (error.code === "ENOENT") return false;
+            throw error;
+          },
+        )
+      ) {
+        await verify(directory);
+        return { directory };
+      }
+      const staging = await mkdtemp(path.join(checkoutRoot, ".fetch-"));
+      const checkout = path.join(staging, "checkout");
+      try {
+        await execFile("git", [
+          "-c",
+          "advice.detachedHead=false",
+          "clone",
+          "--depth",
+          "1",
+          "--single-branch",
+          "--branch",
+          `quixos-reachability/${source.commit.toLowerCase()}`,
+          source.repository,
+          checkout,
+        ]);
+        await verify(checkout);
+        try {
+          await rename(checkout, directory);
+        } catch (error) {
+          if (!["EEXIST", "ENOTEMPTY"].includes((error as NodeJS.ErrnoException).code ?? "")) throw error;
+          await verify(directory);
+        }
+      } finally {
+        await rm(staging, { recursive: true, force: true });
       }
       return { directory };
     })();
     checkouts.set(key, pending);
-    return await pending;
+    try {
+      return await pending;
+    } catch (error) {
+      checkouts.delete(key);
+      throw error;
+    }
   };
 };

src/capability-language/implementation-edit.ts

@@ -0,0 +1,54 @@
+import { parse } from "@babel/parser";
+type Node = { type: string; start: number; end: number; [key: string]: unknown };
+const node = (value: unknown): value is Node =>
+  !!value && typeof value === "object" && typeof (value as Node).type === "string";
+
+/** One requested insertion into ordinary authored TypeScript, not regeneration.
+ * Ambiguous/custom wiring is left alone with an actionable error. */
+export function addImplementation(
+  text: string,
+  factory: "createRuntime" | "serveMigration",
+  key: string,
+  importPath: string,
+  migrationOnly = false,
+): string {
+  const ast = parse(text, { sourceType: "module", plugins: ["typescript"] });
+  const objects: Node[] = [];
+  const names = new Set<string>();
+  const visit = (value: unknown) => {
+    if (Array.isArray(value)) {
+      value.forEach(visit);
+      return;
+    }
+    if (!node(value)) return;
+    if (value.type === "Identifier") names.add(String(value.name));
+    if (
+      value.type === "CallExpression" &&
+      node(value.callee) &&
+      value.callee.type === "Identifier" &&
+      value.callee.name === factory &&
+      Array.isArray(value.arguments) &&
+      value.arguments.length === 1 &&
+      node(value.arguments[0]) &&
+      value.arguments[0].type === "ObjectExpression"
+    )
+      objects.push(value.arguments[0]);
+    Object.values(value).forEach(visit);
+  };
+  visit(ast);
+  if (objects.length !== 1)
+    throw new Error(
+      `Cannot safely add implementation: expected one ${factory}({...}) literal. Wire the handler in your authored server code instead.`,
+    );
+  const object = objects[0];
+  if (
+    (object.properties as Node[]).some((p) => node(p.key) && !p.computed && (p.key.name === key || p.key.value === key))
+  )
+    throw new Error(`Implementation already exists for ${key}`);
+  let alias = "qxImplementation";
+  for (let index = 1; names.has(alias); index++) alias = `qxImplementation${index}`;
+  const value = migrationOnly ? 'async () => { throw new Error("Migration-only export"); }' : alias;
+  const insertion = object.start + 1;
+  const edited = text.slice(0, insertion) + `\n  ${JSON.stringify(key)}: ${value},\n` + text.slice(insertion);
+  return (migrationOnly ? "" : `import {handler as ${alias}} from ${JSON.stringify(importPath)};\n`) + edited;
+}

src/capability-language/index.ts

@@ -1,2 +1,5 @@
 export * from "./parser.js";
 export * from "./assembly.js";
+export * from "./source.js";
+export * from "./source-loader.js";
+export * from "./scaffold.js";

src/capability-language/inspect-cli.ts

@@ -0,0 +1,33 @@
+#!/usr/bin/env node
+// Data only: never load files, resolve repositories, or evaluate code.
+import { parseQx } from "./source.js";
+import { parseQuixosLockDocument } from "../resource-lock/parser.js";
+import { instantiateWorkspaceIdentity } from "./structural-edits.js";
+let input = "";
+for await (const chunk of process.stdin) {
+  input += chunk;
+  if (Buffer.byteLength(input) > 6 * 1024 * 1024) throw new Error("Inspection input exceeds limit");
+}
+const document = JSON.parse(input);
+if (!Array.isArray(document) && document?.operation === "instantiate-workspace") {
+  if (
+    typeof document.source !== "string" ||
+    document.source.length > 262144 ||
+    typeof document.workspaceId !== "string"
+  )
+    throw new Error("Invalid template identity request");
+  process.stdout.write(JSON.stringify({ source: instantiateWorkspaceIdentity(document.source, document.workspaceId) }));
+  process.exit(0);
+}
+const files: { path: string; source: string }[] = document;
+if (!Array.isArray(files) || files.length > 128) throw new Error("Too many source files");
+const result = files.map(({ path, source }) => {
+  if (typeof path !== "string" || typeof source !== "string" || source.length > 262144)
+    throw new Error("Invalid source input");
+  if (path.endsWith(".qx")) {
+    const parsed = parseQx(source, path);
+    return { path, root: parsed.root, diagnostics: parsed.diagnostics };
+  }
+  return { path, lock: parseQuixosLockDocument(source, path) };
+});
+process.stdout.write(JSON.stringify(result));

src/capability-language/migration-seal.ts

@@ -0,0 +1,27 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+import { contentDigest } from "../capability-model/evolution.js";
+import { validateMigrationCatalog, type MigrationCatalog } from "../capability-model/migrations.js";
+import { applyStructure, planStructure } from "./structural-plan.js";
+
+/** Explicitly acknowledge edited migration code. This does not change retained
+ * contracts or grant activation approval; the immutable checker verifies it. */
+export async function sealMigrations(directory: string) {
+  const root = await fs.realpath(directory);
+  const file = "quixos.migrations.json";
+  const before = await fs.readFile(path.join(root, file), "utf8");
+  const catalog = JSON.parse(before) as MigrationCatalog;
+  for (const migration of catalog.migrations) {
+    const implementation = await fs.realpath(path.join(root, migration.implementation.file));
+    if (!implementation.startsWith(root + path.sep)) throw new Error("Migration implementation escapes package");
+    migration.implementation.digest = contentDigest(await fs.readFile(implementation, "utf8"));
+  }
+  validateMigrationCatalog(catalog);
+  return applyStructure(
+    await planStructure(root, {
+      kind: "package",
+      validation: "syntax",
+      files: [{ file, expected: before, replace: JSON.stringify(catalog, null, 2) + "\n" }],
+    }),
+  );
+}

src/capability-language/pin-upgrades.ts

@@ -0,0 +1,477 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+import os from "node:os";
+import { randomUUID } from "node:crypto";
+import { execFile as callback } from "node:child_process";
+import { promisify } from "node:util";
+import { loadQuixosLock, parseQuixosLockDocument } from "../resource-lock/index.js";
+import { contentDigest } from "../capability-model/evolution.js";
+import { planStructure, applyStructure, type StructuralRequest } from "./structural-plan.js";
+import { snapshotRepository } from "./candidate-check.js";
+import {
+  compileWorkspaceRepository,
+  compileCapabilityResourceRepository,
+  type ResolvedCapabilityResource,
+} from "./assembly.js";
+import { createGitCapabilityResolver } from "./git-resolver.js";
+import { snapshotCommit, buildImmutableCandidate } from "./checked-build.js";
+import { planEvolution, type WorkspaceRevision, type EvolutionReview } from "../capability-model/index.js";
+import { withFileLock } from "./file-lock.js";
+const execFile = promisify(callback);
+type Source = { repository: string; commit: string };
+export type UpgradeNode = { kind: "workspace" | "package" | "interface"; directory: string; source: Source };
+export type UpgradeSpec = {
+  nodes: UpgradeNode[];
+  quixos?: Source;
+  baseline?: string;
+  reviews?: string;
+  bootstrap?: boolean;
+};
+type NodePlan = UpgradeNode & { treeDigest: string; dependencies: string[]; lockFiles: string[] };
+export type UpgradePlan = { schemaVersion: 1; workbench: string; spec: UpgradeSpec; nodes: NodePlan[]; digest: string };
+type Step = {
+  directory: string;
+  phase: "editing" | "prepared" | "refactor" | "checked" | "publishing" | "published";
+  commit?: string;
+  treeDigest?: string;
+  structuralJournal?: string;
+  structuralPlan?: Awaited<ReturnType<typeof planStructure>>;
+};
+type Journal = { schemaVersion: 1; plan: UpgradePlan; steps: Step[] };
+const sourceKey = (node: { kind: string; source: Source }) =>
+  JSON.stringify([node.kind, node.source.repository, node.source.commit]);
+const command = async (cwd: string, tool: string, args: string[]) =>
+  (
+    await execFile(tool, args, {
+      cwd,
+      maxBuffer: 16 * 1024 * 1024,
+      env: { ...process.env, GIT_TERMINAL_PROMPT: "0", QUIXOS_JJ_NO_CHECKPOINT: "1", QUIXOS_SUBTREE_PUBLISH: "0" },
+    })
+  ).stdout.trim();
+const validSource = (value: Source) => {
+  const url = new URL(value.repository);
+  if (
+    url.protocol !== "https:" ||
+    url.username ||
+    url.password ||
+    url.search ||
+    url.hash ||
+    !/^(?:[a-f0-9]{40}|[a-f0-9]{64})$/.test(value.commit)
+  )
+    throw new Error("Upgrade sources must be exact credential-free HTTPS revisions");
+};
+const location = async (root: string, directory: string) => {
+  if (directory !== "root" && !/^resources\/[A-Za-z0-9][A-Za-z0-9._-]*$/.test(directory))
+    throw new Error("Upgrade target must be a managed root/resource repository");
+  const resolved = await fs.realpath(path.join(root, directory));
+  if (resolved !== path.join(root, directory)) throw new Error("Upgrade target crosses a symlink");
+  return resolved;
+};
+const treeDigest = async (root: string) => {
+  const temporary = await fs.mkdtemp(path.join(os.tmpdir(), "qx-upgrade-tree-"));
+  try {
+    return (await snapshotRepository(root, temporary)).treeDigest;
+  } finally {
+    await fs.rm(temporary, { recursive: true, force: true });
+  }
+};
+const writeJournal = async (filename: string, journal: unknown) => {
+  const temp = `${filename}.${randomUUID()}.tmp`;
+  const handle = await fs.open(temp, "wx", 0o600);
+  try {
+    await handle.writeFile(JSON.stringify(journal, null, 2));
+    await handle.sync();
+  } finally {
+    await handle.close();
+  }
+  await fs.rename(temp, filename);
+  const directory = await fs.open(path.dirname(filename), "r");
+  try {
+    await directory.sync();
+  } finally {
+    await directory.close();
+  }
+};
+
+export const discoverUpgradeSpec = async (workbench: string): Promise<UpgradeSpec> => {
+  const graph = JSON.parse(await fs.readFile(path.join(workbench, ".quixos/resource-graph.json"), "utf8"));
+  const root = await location(workbench, "root");
+  const nodes: UpgradeNode[] = [
+    {
+      kind: "workspace",
+      directory: "root",
+      source: {
+        repository: await command(root, "git", ["config", "--get", "remote.origin.url"]),
+        commit: await command(root, "jj", ["--ignore-working-copy", "log", "--no-graph", "-r", "@", "-T", "commit_id"]),
+      },
+    },
+    ...graph.resources.map((entry: { kind: "interface" | "package"; directory: string; source: Source }) => ({
+      kind: entry.kind,
+      source: entry.source,
+      directory: path.relative(workbench, path.resolve(workbench, entry.directory)),
+    })),
+  ];
+  let baseline: string | undefined;
+  try {
+    const host = JSON.parse(await fs.readFile("/etc/quixos/workspace-source.json", "utf8"));
+    if ((await fs.realpath(host.workbenchRoot)) === (await fs.realpath(workbench)))
+      baseline = JSON.parse(
+        await fs.readFile(path.join(host.runtimeClosureRoot, "manifest.json"), "utf8"),
+      ).workspacePlanPath;
+  } catch (error) {
+    if (!["ENOENT", "EACCES"].includes((error as NodeJS.ErrnoException).code ?? "")) throw error;
+  }
+  return { nodes, baseline };
+};
+
+/** Read-only source plan. Repositories are selected explicitly, including any
+ * parallel versions of the same resource; no guesses at a floating 'latest'. */
+export const planPinUpgrades = async (workbenchPath: string, spec: UpgradeSpec): Promise<UpgradePlan> => {
+  const workbench = await fs.realpath(workbenchPath);
+  if (
+    !Array.isArray(spec.nodes) ||
+    !spec.nodes.length ||
+    spec.nodes.length > 100 ||
+    spec.nodes.filter((node) => node.kind === "workspace").length !== 1
+  )
+    throw new Error("Upgrade graph requires one workspace and at most 100 repositories");
+  if (spec.quixos) validSource(spec.quixos);
+  const keys = new Map<string, string>();
+  for (const node of spec.nodes) {
+    validSource(node.source);
+    if (!["workspace", "package", "interface"].includes(node.kind) || keys.has(sourceKey(node)))
+      throw new Error("Duplicate/invalid upgrade resource identity");
+    keys.set(sourceKey(node), node.directory);
+  }
+  if (new Set(spec.nodes.map((node) => node.directory)).size !== spec.nodes.length)
+    throw new Error("Upgrade directories must be distinct");
+  const nodes: NodePlan[] = [];
+  for (const node of spec.nodes) {
+    const root = await location(workbench, node.directory);
+    if ((await command(root, "git", ["config", "--get", "remote.origin.url"])) !== node.source.repository)
+      throw new Error(`Upgrade origin differs from selected source: ${node.directory}`);
+    const loaded = await loadQuixosLock(path.join(root, "quixos.lock"));
+    if (!loaded.ok)
+      throw new Error(
+        `Invalid lock in ${node.directory}: ${loaded.diagnostics.map((entry) => entry.message).join("; ")}`,
+      );
+    const dependencies = loaded.lock.resources
+      .map((resource) => keys.get(sourceKey(resource)))
+      .filter((value): value is string => Boolean(value));
+    nodes.push({
+      ...node,
+      treeDigest: await treeDigest(root),
+      dependencies: [...new Set(dependencies)],
+      lockFiles: loaded.lock.sourceFiles ?? ["quixos.lock"],
+    });
+  }
+  const ordered: NodePlan[] = [],
+    remaining = [...nodes];
+  while (remaining.length) {
+    const index = remaining.findIndex((node) =>
+      node.dependencies.every((dependency) => ordered.some((entry) => entry.directory === dependency)),
+    );
+    if (index < 0) throw new Error("Cyclic source publication graph");
+    ordered.push(remaining.splice(index, 1)[0]);
+  }
+  const workspace = ordered.find((node) => node.kind === "workspace")!;
+  // Even unreferenced new resources are published before the root.
+  ordered.splice(ordered.indexOf(workspace), 1);
+  ordered.push(workspace);
+  const plan = { schemaVersion: 1 as const, workbench, spec, nodes: ordered };
+  return { ...plan, digest: contentDigest(plan) };
+};
+
+export type UpgradeEffects = {
+  check(node: NodePlan, root: string, output: string, spec: UpgradeSpec): Promise<void>;
+  snapshot(root: string): Promise<string>;
+  publish(root: string, commit: string): Promise<void>;
+};
+const effects: UpgradeEffects = {
+  async check(node, root, output, spec) {
+    if (node.kind === "workspace" && !spec.baseline && !spec.bootstrap)
+      throw new Error(
+        "Upgrading a workspace requires its checked active baseline for major-review checks (or explicit bootstrap:true for a new workspace)",
+      );
+    // Explicit baseline upgrades use the same immutable Nix checker. Retaining
+    // an unverified source is safe and must precede a remote flake fetch.
+    await fs.mkdir(output);
+    const commit = await snapshotCommit(root);
+    await effects.publish(root, commit);
+    const artifact = await buildImmutableCandidate({ ...node.source, commit }, node.kind, path.join(output, "nix.log"));
+    const candidate = await fs.readFile(path.join(artifact, "candidate.json"), "utf8");
+    await fs.writeFile(path.join(output, "candidate.json"), candidate);
+    if (node.kind === "workspace") {
+      const baseline = spec.baseline
+        ? (JSON.parse(await fs.readFile(spec.baseline, "utf8")) as WorkspaceRevision)
+        : null;
+      const reviews = spec.reviews ? (JSON.parse(await fs.readFile(spec.reviews, "utf8")) as EvolutionReview[]) : [];
+      const evolution = planEvolution(baseline, JSON.parse(candidate), { reviews });
+      await fs.writeFile(path.join(output, "evolution.json"), JSON.stringify(evolution, null, 2));
+      if (evolution.blockers.length)
+        throw new Error(`Refactor required in ${node.directory}: ${evolution.blockers.join("; ")}`);
+    }
+  },
+  async snapshot(root) {
+    const commit = await snapshotCommit(root);
+    if (!/^(?:[a-f0-9]{40}|[a-f0-9]{64})$/.test(commit)) throw new Error("Publication did not resolve an exact commit");
+    await command(root, "git", ["diff", "--exit-code", "--no-ext-diff", "--no-textconv", commit, "--"]);
+    const tracked = new Set((await command(root, "git", ["ls-tree", "-r", "--name-only", "-z", commit])).split("\0"));
+    for (const file of (await command(root, "git", ["ls-files", "--others", "--exclude-standard", "-z"]))
+      .split("\0")
+      .filter(Boolean))
+      if (!tracked.has(file)) throw new Error(`Uncaptured source file ${file}`);
+    return commit;
+  },
+  async publish(root, commit) {
+    const ref = `refs/tags/quixos-reachability/${commit}`;
+    const remote = await command(root, "git", ["ls-remote", "--refs", "origin", ref]);
+    if (remote && remote !== `${commit}\t${ref}`) throw new Error("Immutable publication ref conflict");
+    if (!remote) await command(root, "git", ["push", "origin", `${commit}:${ref}`]);
+    if ((await command(root, "git", ["ls-remote", "--refs", "origin", ref])) !== `${commit}\t${ref}`)
+      throw new Error("Publication response uncertain; retry the same journal");
+  },
+};
+
+/** Explicit --publish only. Append-only remote retention; never moves the
+ * workspace branch, activates code, or rolls back previously published nodes. */
+export const applyPinUpgrades = async (
+  plan: UpgradePlan,
+  journalId?: string,
+  implementation: UpgradeEffects = effects,
+  options: { acceptEdits?: boolean } = {},
+) => {
+  if (implementation === effects && !plan.spec.baseline && !plan.spec.bootstrap)
+    throw new Error("Publication requires an active checked baseline or explicit bootstrap:true");
+  const { digest, ...body } = plan;
+  if (contentDigest(body) !== digest) throw new Error("Upgrade plan digest mismatch");
+  const directory = path.join(plan.workbench, ".quixos", "upgrades");
+  await fs.mkdir(directory, { recursive: true, mode: 0o700 });
+  if ((await fs.realpath(directory)) !== directory) throw new Error("Upgrade journals must not cross symlinks");
+  const id = journalId ?? randomUUID();
+  if (!/^[a-f0-9-]{36}$/.test(id)) throw new Error("Invalid upgrade journal ID");
+  const filename = path.join(directory, `${id}.json`);
+  return withFileLock(path.join(directory, "writer.lock"), async () => {
+    try {
+      const journal: Journal = journalId
+        ? JSON.parse(await fs.readFile(filename, "utf8"))
+        : { schemaVersion: 1, plan, steps: [] };
+      if (journal.plan.digest !== plan.digest) throw new Error("Upgrade journal belongs to another plan");
+      if (!journalId) await writeJournal(filename, journal);
+      for (const node of plan.nodes) {
+        const root = await location(plan.workbench, node.directory);
+        if ((await command(root, "git", ["config", "--get", "remote.origin.url"])) !== node.source.repository)
+          throw new Error("Upgrade remote changed after planning");
+        let step = journal.steps.find((entry) => entry.directory === node.directory);
+        if (step?.phase === "published") continue;
+        if (!step) {
+          if ((await treeDigest(root)) !== node.treeDigest) throw new Error(`Stale upgrade plan: ${node.directory}`);
+          const files: StructuralRequest["files"] = [];
+          for (const file of node.lockFiles) {
+            const parsed = parseQuixosLockDocument(await fs.readFile(path.join(root, file), "utf8"));
+            if (!parsed.ok) throw new Error("Invalid lock during upgrade");
+            const edits = [];
+            for (const resource of parsed.document.resources) {
+              const dependency = plan.nodes.find((entry) => sourceKey(entry) === sourceKey(resource));
+              const published =
+                dependency &&
+                journal.steps.find((entry) => entry.directory === dependency.directory && entry.phase === "published");
+              if (published?.commit && published.commit !== resource.source.commit)
+                edits.push({
+                  operation: "dependency" as const,
+                  kind: resource.kind,
+                  name: resource.binding,
+                  source: { ...resource.source, commit: published.commit },
+                });
+            }
+            if (parsed.document.kind === "root" && plan.spec.quixos)
+              edits.push({ operation: "quixos-pin" as const, source: plan.spec.quixos });
+            if (edits.length) files.push({ file, edits });
+          }
+          const structuralPlan = files.length
+            ? await planStructure(
+                root,
+                { kind: node.kind, source: node.source, files },
+                process.env.QUIXOS_SNAPSHOT_MAP,
+              )
+            : undefined;
+          step = {
+            directory: node.directory,
+            phase: "editing",
+            treeDigest: node.treeDigest,
+            structuralPlan,
+            structuralJournal: structuralPlan ? randomUUID() : undefined,
+          };
+          journal.steps.push(step);
+          await writeJournal(filename, journal);
+        }
+        if (step.phase === "editing") {
+          if (step.structuralPlan) await applyStructure(step.structuralPlan, step.structuralJournal);
+          else if ((await treeDigest(root)) !== step.treeDigest)
+            throw new Error("Source changed before upgrade editing");
+          step.treeDigest = await treeDigest(root);
+          step.phase = "prepared";
+          await writeJournal(filename, journal);
+        }
+        if (step.phase === "refactor") {
+          const current = await treeDigest(root);
+          if (current !== step.treeDigest && !options.acceptEdits)
+            throw new Error("Refactored source requires --accept-edits when resuming");
+          step.treeDigest = current;
+          step.phase = "prepared";
+          await writeJournal(filename, journal);
+        }
+        if ((await treeDigest(root)) !== step.treeDigest)
+          throw new Error(`Source changed during upgrade: ${node.directory}; inspect ${filename}`);
+        if (step.phase === "prepared") {
+          try {
+            await implementation.check(
+              node,
+              root,
+              path.join(directory, `${id}-${node.directory.replaceAll("/", "-")}-${randomUUID()}`),
+              plan.spec,
+            );
+          } catch (error) {
+            step.phase = "refactor";
+            await writeJournal(filename, journal);
+            throw error;
+          }
+          if ((await treeDigest(root)) !== step.treeDigest) throw new Error("Source changed while checking");
+          step.phase = "checked";
+          await writeJournal(filename, journal);
+        }
+        if (step.phase === "checked") {
+          step.commit = await implementation.snapshot(root);
+          if ((await treeDigest(root)) !== step.treeDigest)
+            throw new Error("Publication snapshot changed checked files");
+          step.phase = "publishing";
+          await writeJournal(filename, journal);
+        }
+        await implementation.publish(root, step.commit!);
+        step.phase = "published";
+        await writeJournal(filename, journal);
+      }
+      // Keep subsequent automatic upgrades associated with the newly published
+      // identities, without renaming repositories or changing any selected branch.
+      // Explicit-spec callers without a managed graph retain the journal as their
+      // source of revisions instead.
+      const graphFile = path.join(plan.workbench, ".quixos/resource-graph.json");
+      let graphText: string | undefined;
+      try {
+        graphText = await fs.readFile(graphFile, "utf8");
+      } catch (error) {
+        if ((error as NodeJS.ErrnoException).code !== "ENOENT") throw error;
+      }
+      if (graphText !== undefined) {
+        const previous = JSON.parse(graphText);
+        const snapshots = await Promise.all(
+          previous.resources.map(async (entry: { kind: string; source: Source; directory: string }) => ({
+            kind: entry.kind,
+            ...entry.source,
+            directory: await location(
+              plan.workbench,
+              path.relative(plan.workbench, path.resolve(plan.workbench, entry.directory)),
+            ),
+          })),
+        );
+        for (const node of plan.nodes.filter((entry) => entry.kind !== "workspace")) {
+          const step = journal.steps.find((entry) => entry.directory === node.directory)!;
+          if ((await treeDigest(await location(plan.workbench, node.directory))) !== step.treeDigest)
+            throw new Error("Published source changed before workbench graph refresh");
+          snapshots.push({
+            kind: node.kind,
+            repository: node.source.repository,
+            commit: step.commit,
+            directory: path.join(plan.workbench, node.directory),
+          });
+        }
+        const unique = [
+          ...new Map(
+            snapshots.map((entry: { kind: string; repository: string; commit: string }) => [
+              JSON.stringify([entry.kind, entry.repository, entry.commit]),
+              entry,
+            ]),
+          ).values(),
+        ];
+        const snapshotMap = path.join(directory, `${id}-published-snapshots.json`);
+        await fs.writeFile(snapshotMap, JSON.stringify({ resources: unique }));
+        const resolveResource = await createGitCapabilityResolver({
+          checkoutRoot: path.join(directory, `${id}-graph-resources`),
+          snapshotMap,
+          snapshotOnly: true,
+        });
+        const rootNode = plan.nodes.find((node) => node.kind === "workspace")!;
+        if (
+          (await treeDigest(await location(plan.workbench, rootNode.directory))) !==
+          journal.steps.find((step) => step.directory === rootNode.directory)!.treeDigest
+        )
+          throw new Error("Root source changed before workbench graph refresh");
+        const compiled = await compileWorkspaceRepository({
+          rootDirectory: await location(plan.workbench, rootNode.directory),
+          resolveResource,
+        });
+        // Managed repositories need not currently be reachable from the workspace.
+        // Keep them discoverable/checkpointed until explicitly removed by the user.
+        const resources = new Map<string, ResolvedCapabilityResource>(
+          compiled.resources.map((node) => [node.key, node]),
+        );
+        for (const node of plan.nodes.filter((entry) => entry.kind !== "workspace")) {
+          const step = journal.steps.find((entry) => entry.directory === node.directory)!;
+          const source = { resolver: "git" as const, repository: node.source.repository, commit: step.commit! };
+          const key = `${node.kind}\0${source.repository}\0${source.commit}`;
+          if (resources.has(key)) continue;
+          const directory = await location(plan.workbench, node.directory);
+          const standalone = await compileCapabilityResourceRepository({
+            rootDirectory: directory,
+            kind: node.kind as "package" | "interface",
+            source,
+            resolveResource,
+          });
+          for (const dependency of standalone.resources) resources.set(dependency.key, dependency);
+          resources.set(key, {
+            key,
+            kind: node.kind as "package" | "interface",
+            source,
+            directory,
+            lock: standalone.lock,
+            resource: standalone.resource,
+            dependencies: standalone.directResources,
+          });
+        }
+        await writeJournal(graphFile, {
+          formatVersion: 1,
+          quixos: compiled.lock.quixos,
+          directResources: [...compiled.directResources.entries()].map(([bindingKey, node]) => {
+            const [kind, binding] = bindingKey.split("\0");
+            return { kind, binding, resourceKey: node.key, directory: node.directory };
+          }),
+          resources: [...resources.values()].map((node) => ({
+            key: node.key,
+            kind: node.kind,
+            source: node.source,
+            directory: node.directory,
+            resourceId:
+              node.resource.kind === "interface"
+                ? node.resource.revision.interfaceId
+                : node.resource.revision.packageId,
+            revisionId: node.resource.revision.revisionId,
+            dependencies: [...node.dependencies.entries()].map(([binding, dependency]) => ({
+              binding,
+              resourceKey: dependency.key,
+            })),
+          })),
+        });
+      }
+      return {
+        id,
+        journal: filename,
+        revisions: journal.steps.map((step) => ({ directory: step.directory, commit: step.commit })),
+        activated: false,
+      };
+    } catch (error) {
+      throw new Error(`${error instanceof Error ? error.message : String(error)}; upgrade journal ${filename}`, {
+        cause: error,
+      });
+    }
+  });
+};

src/capability-language/resource-cli.ts

@@ -2,15 +2,13 @@
 
 import { writeFile } from "node:fs/promises";
 import process from "node:process";
-import {
+import { bindingSchema } from "../bindings/index.js";
-  compileCapabilityResourceRepository,
+import { compileCapabilityResourceRepository, type ResolvedCapabilityResource } from "./assembly.js";
-  type ResolvedCapabilityResource,
-} from "./assembly.js";
 import { createGitCapabilityResolver } from "./git-resolver.js";
 
 const usage = `usage: quixos-resource-compile --root DIRECTORY --kind interface|package
        --repository URL --commit GIT_REV --checkout-root DIRECTORY
-       [--snapshot-map PATH] [--graph-out PATH]
+       [--snapshot-map PATH] [--snapshot-only true] [--graph-out PATH] [--schema-out PATH]
 
 Resolves a standalone resource's recursive dependency-lock graph, validates
 its interface.qx or package.qx manifest, and emits the checked resource as JSON.`;
@@ -21,6 +19,21 @@ const parseArgs = (args: string[]) => {
     const key = args[index];
     const value = args[index + 1];
     if (!key?.startsWith("--") || !value) throw new Error(usage);
+    if (
+      ![
+        "--root",
+        "--kind",
+        "--repository",
+        "--commit",
+        "--checkout-root",
+        "--snapshot-map",
+        "--snapshot-only",
+        "--graph-out",
+        "--schema-out",
+      ].includes(key) ||
+      values.has(key)
+    )
+      throw new Error(usage);
     values.set(key, value);
   }
   const rootDirectory = values.get("--root");
@@ -28,13 +41,14 @@ const parseArgs = (args: string[]) => {
   const repository = values.get("--repository");
   const commit = values.get("--commit")?.toLowerCase();
   const checkoutRoot = values.get("--checkout-root");
-  if (!rootDirectory || !repository || !commit || !checkoutRoot ||
+  if (!rootDirectory || !repository || !commit || !checkoutRoot || (kind !== "interface" && kind !== "package")) {
-      (kind !== "interface" && kind !== "package")) {
     throw new Error(usage);
   }
   if (!/^([0-9a-f]{40}|[0-9a-f]{64})$/.test(commit)) {
     throw new Error("--commit must be a full Git object ID");
   }
+  if (values.has("--snapshot-only") && values.get("--snapshot-only") !== "true")
+    throw new Error("--snapshot-only accepts true");
   return {
     rootDirectory,
     kind,
@@ -42,7 +56,9 @@ const parseArgs = (args: string[]) => {
     commit,
     checkoutRoot,
     snapshotMap: values.get("--snapshot-map"),
+    snapshotOnly: values.get("--snapshot-only") === "true",
     graphOut: values.get("--graph-out"),
+    schemaOut: values.get("--schema-out"),
   } as const;
 };
 
@@ -51,9 +67,8 @@ const graphEntry = (node: ResolvedCapabilityResource) => ({
   kind: node.kind,
   source: node.source,
   directory: node.directory,
-  resourceId: node.resource.kind === "interface"
+  resourceId:
-    ? node.resource.revision.interfaceId
+    node.resource.kind === "interface" ? node.resource.revision.interfaceId : node.resource.revision.packageId,
-    : node.resource.revision.packageId,
   revisionId: node.resource.revision.revisionId,
   dependencies: [...node.dependencies.entries()].map(([binding, dependency]) => ({
     binding,
@@ -70,6 +85,7 @@ const main = async () => {
   const resolveResource = await createGitCapabilityResolver({
     checkoutRoot: options.checkoutRoot,
     snapshotMap: options.snapshotMap,
+    snapshotOnly: options.snapshotOnly,
   });
   const compiled = await compileCapabilityResourceRepository({
     rootDirectory: options.rootDirectory,
@@ -82,20 +98,32 @@ const main = async () => {
     resolveResource,
   });
   if (options.graphOut) {
-    await writeFile(options.graphOut, `${JSON.stringify({
+    await writeFile(
-      formatVersion: 1,
+      options.graphOut,
-      quixos: compiled.lock.quixos,
+      `${JSON.stringify(
-      root: graphEntry(compiled.resources.find((node) =>
+        {
-        node.source.repository === options.repository &&
+          formatVersion: 1,
-        node.source.commit === options.commit &&
+          quixos: compiled.lock.quixos,
-        node.kind === options.kind)!),
+          root: graphEntry(
-      resources: compiled.resources.map(graphEntry),
+            compiled.resources.find(
-    }, null, 2)}\n`);
+              (node) =>
+                node.source.repository === options.repository &&
+                node.source.commit === options.commit &&
+                node.kind === options.kind,
+            )!,
+          ),
+          resources: compiled.resources.map(graphEntry),
+        },
+        null,
+        2,
+      )}\n`,
+    );
   }
+  if (options.schemaOut) await writeFile(options.schemaOut, `${JSON.stringify(bindingSchema(compiled), null, 2)}\n`);
   process.stdout.write(`${JSON.stringify(compiled.resource, null, 2)}\n`);
 };
 
 main().catch((error: unknown) => {
-  process.stderr.write(`${error instanceof Error ? error.stack ?? error.message : String(error)}\n`);
+  process.stderr.write(`${error instanceof Error ? (error.stack ?? error.message) : String(error)}\n`);
   process.exitCode = 1;
 });

src/capability-language/scaffold-recipes.ts

@@ -0,0 +1,421 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+import { contentDigest } from "../capability-model/evolution.js";
+import {
+  validateMigrationCatalog,
+  type MigrationCatalog,
+  type MigrationDeclaration,
+} from "../capability-model/migrations.js";
+import { formatQuixosLock, type GitSource } from "../resource-lock/index.js";
+import { parseQx, walkSyntax } from "./source.js";
+import type { StructuralRequest } from "./structural-plan.js";
+import { addImplementation } from "./implementation-edit.js";
+import { reactPlatformTypes } from "../bindings/react-platform.js";
+
+type Source = { repository: string; commit: string };
+type PackageEditModel = {
+  generatedBy: "qx-scaffold-v1";
+  name: string;
+  id: string;
+  revision: string;
+  exports: { name: string; id: string; file: string; migration?: boolean }[];
+};
+export type ScaffoldRecipe = {
+  template?: "typescript" | "typescript-react";
+  source: Source;
+  directory?: string;
+  name?: string;
+  id?: string;
+  revision?: string;
+  declaration?: string;
+  /** Initial authored files for a composed recipe; only used for a new package. */
+  initialFiles?: Record<string, string>;
+  tools?: { quixos: Source; protocol: Source; helpers: Source; sdk: Source };
+  nixifyPluginUrl?: string;
+  migration?: Omit<MigrationDeclaration, "implementation"> & { contracts: Record<string, unknown> };
+};
+const json = (value: unknown) => `${JSON.stringify(value, null, 2)}\n`;
+const source = (value: Source): GitSource => {
+  if (!value || typeof value.repository !== "string" || typeof value.commit !== "string")
+    throw new Error("Scaffold requires an exact source identity; use qx-workspace from a registered repository");
+  const url = new URL(value.repository);
+  if (
+    url.protocol !== "https:" ||
+    url.username ||
+    url.password ||
+    url.search ||
+    url.hash ||
+    !/^(?:[0-9a-f]{40}|[0-9a-f]{64})$/.test(value.commit)
+  )
+    throw new Error("Scaffolds require credential-free HTTPS sources and full exact commits");
+  return { resolver: "git", ...value };
+};
+const nixSource = (value: Source) =>
+  `git+${source(value).repository}?ref=refs/tags/quixos-reachability/${value.commit}&rev=${value.commit}`;
+const nixString = (value: string) => JSON.stringify(value).replaceAll("${", "\\${");
+const safeName = (name: string | undefined): string => {
+  if (!name || !/^[A-Za-z_][A-Za-z0-9_]*$/.test(name)) throw new Error("Scaffold requires a simple authored name");
+  return name;
+};
+const ownedJson = async <T>(root: string, file: string): Promise<T> => {
+  const target = path.join(root, file);
+  if (!(await fs.realpath(target)).startsWith(`${await fs.realpath(root)}/`))
+    throw new Error("Scaffold input escapes repository");
+  const value = JSON.parse(await fs.readFile(target, "utf8"));
+  if (value.generatedBy !== "qx-scaffold-v1") throw new Error(`Not scaffold-owned: ${file}`);
+  return value;
+};
+
+/** Recipes describe structural edits; planStructure owns validation/journaling.
+ * Implementation files are created once; later edits preserve authored wiring. */
+export const scaffoldRecipe = async (
+  root: string,
+  command: "package" | "function" | "migration" | "refresh",
+  spec: ScaffoldRecipe,
+): Promise<StructuralRequest> => {
+  if (command === "refresh")
+    throw new Error(
+      "Scaffold refresh has been removed. Edit declarations and typed server wiring directly, then run qx-workspace check. Use scaffold function to add a declaration and handler together.",
+    );
+  source(spec.source);
+  if (spec.directory && !/^[A-Za-z0-9_-][A-Za-z0-9_.-]*(?:\/[A-Za-z0-9_-][A-Za-z0-9_.-]*)*$/.test(spec.directory))
+    throw new Error("Scaffold directory must be contained");
+  const prefix = spec.directory ? `${spec.directory}/` : "";
+  const files: StructuralRequest["files"] = [];
+  const create = (file: string, content: string) => files.push({ file: prefix + file, create: content });
+  const generated = (file: string, content: string) => files.push({ file: prefix + file, generated: content });
+  let packageModel: PackageEditModel;
+  let catalog: MigrationCatalog & { generatedBy: "qx-scaffold-v1" };
+  if (command === "package") {
+    const name = safeName(spec.name);
+    if (spec.template && !["typescript", "typescript-react"].includes(spec.template))
+      throw new Error("Unknown package template");
+    const react = spec.template === "typescript-react";
+    if (!spec.id || !spec.revision || !spec.tools)
+      throw new Error("Package scaffold requires id, revision, and exact quixos/protocol/helpers/sdk tool sources");
+    Object.values(spec.tools).forEach(source);
+    packageModel = { generatedBy: "qx-scaffold-v1", name, id: spec.id, revision: spec.revision, exports: [] };
+    catalog = { generatedBy: "qx-scaffold-v1", schemaVersion: 1, contracts: {}, migrations: [] };
+    if (react)
+      packageModel.exports.push({ name: "sourceGet", id: `export:${name}:source`, file: "src/impl/sourceGet.ts" });
+    create(
+      "package.qx",
+      `package ${name} id ${JSON.stringify(spec.id)} revision ${JSON.stringify(spec.revision)} {\n${react ? `  function sourceGet id ${JSON.stringify(`export:${name}:source`)} : unit -> string;\n` : ""}}\n`,
+    );
+    create("quixos.lock", formatQuixosLock({ formatVersion: 1, quixos: source(spec.tools.quixos), resources: [] }));
+    create(
+      "package.json",
+      json({
+        name: `@quixos/${name.toLowerCase()}`,
+        version: "0.1.0",
+        private: true,
+        type: "module",
+        packageManager: "yarn@4.18.0",
+        scripts: { build: "tsc -p tsconfig.json", typecheck: "tsc --noEmit" },
+        dependencies: {
+          "@quixos/camino-package-runtime": `${spec.tools.sdk.repository}#commit=${spec.tools.sdk.commit}`,
+        },
+        devDependencies: {
+          "@types/node": "^24",
+          typescript: "^7.0.2",
+          ...(react ? { react: "^18.3.1", "@types/react": "^18.3.12", esbuild: "^0.25.12" } : {}),
+        },
+      }),
+    );
+    create(
+      "tsconfig.json",
+      json({
+        compilerOptions: {
+          target: "ES2023",
+          module: "NodeNext",
+          moduleResolution: "NodeNext",
+          strict: true,
+          types: ["node", ...(react ? ["react"] : [])],
+          outDir: "dist",
+          rootDir: "src",
+          skipLibCheck: true,
+          ...(react ? { jsx: "react-jsx", esModuleInterop: true } : {}),
+        },
+        include: ["src/**/*.ts", "src/**/*.tsx"],
+      }),
+    );
+    if (react) {
+      create(
+        "src/component.tsx",
+        `// Add a checked props export, select it in quixos.check.json options.react,\n// then use its generated ReactResults type. Scaffold bundle does this for you.\nexport default function Component(_props: {camino: Record<string, never>; render: unknown; dispatch: (action: unknown) => void}) {\n  return <section><h1>${name}</h1></section>;\n}\n`,
+      );
+      create(
+        "src/impl/sourceGet.ts",
+        `import componentSource from "../component.js?browser-source";\nimport type {Implementation} from "../gen/qx.js";\nexport const handler: Implementation["sourceGet"] = () => componentSource;\n`,
+      );
+      create(
+        "src/browser-assets.d.ts",
+        `declare module "*?browser-source" { const source: string; export default source; }\ndeclare module "*.css" {}\n`,
+      );
+      create("src/gen/web-studio-react-runtime.d.ts", reactPlatformTypes);
+    }
+    create(".gitignore", "node_modules/\ndist/\n.quixos/\nresult\n.yarn/install-state.gz\n");
+    create(
+      ".yarnrc.yml",
+      `nodeLinker: node-modules\nenableScripts: true\nnpmMinimalAgeGate: 0\napprovedGitRepositories:\n  - ${JSON.stringify(spec.tools.sdk.repository)}\nsupportedArchitectures:\n  os: [current, linux]\n  cpu: [current, x64, arm64]\n  libc: [current, glibc]\n`,
+    );
+    const nixifyPluginUrl =
+      spec.nixifyPluginUrl ??
+      "https://gitea-external.egads.tutti.syntaxblitz.net/quixos/yarn-plugin-nixify-patched/raw/commit/4528fdd20b30d869262443b3f044549810e75fb8/dist/yarn-plugin-nixify.js";
+    const plugin = new URL(nixifyPluginUrl);
+    if (
+      plugin.protocol !== "https:" ||
+      plugin.username ||
+      plugin.password ||
+      plugin.search ||
+      plugin.hash ||
+      !/\/commit\/[a-f0-9]{40,64}\//.test(plugin.pathname)
+    )
+      throw new Error("Nixify plugin must have an exact credential-free HTTPS commit URL");
+    generated("quixos.toolchain.json", json({ generatedBy: "qx-scaffold-v1", nixifyPluginUrl }));
+    create(
+      "quixos.check.json",
+      json({
+        backend: "typescript",
+        bindingOutput: "src/gen/qx.ts",
+        ...(react
+          ? {
+              options: { react: { propsExports: [] } },
+            }
+          : {}),
+      }),
+    );
+    create(
+      "flake.nix",
+      `{
+  inputs.protocol.url = ${nixString(nixSource(spec.tools.protocol))};
+  inputs.nixpkgs.follows = "protocol/nixpkgs";
+  inputs.flake-utils.follows = "protocol/flake-utils";
+  inputs.helpers = { url = ${nixString(nixSource(spec.tools.helpers))}; flake = false; };
+  outputs = inputs@{ self, protocol, nixpkgs, flake-utils, helpers, ... }:
+    (import (toString helpers + "/quixos-package-helpers.nix")).mkCaminoTsYarnNixifyFlake {
+      inherit inputs nixpkgs flake-utils; packageRoot = ./.;
+      bundle = { entry = ${JSON.stringify(react ? "src/server.ts" : "dist/server.js")}; ${react ? "browserSources = true;" : ""} };
+      migrationEntrypoint = "dist/migrate.js";
+      installServer = { libexecName = ${JSON.stringify(name.toLowerCase())}; descriptorPath = "descriptor.quixos-package.txtpb"; };
+    };
+}\n`,
+    );
+  } else {
+    catalog = await ownedJson<typeof catalog>(root, prefix + "quixos.migrations.json");
+    // Derive the edit model from authored declarations; it is never persisted.
+    const authored = await fs.readFile(path.join(root, prefix, "package.qx"), "utf8");
+    const syntax = parseQx(authored);
+    if (syntax.diagnostics.length)
+      throw new Error("Cannot scaffold into an invalid package.qx; fix the reported syntax first");
+    const declaration = [...walkSyntax(syntax.root)].find((node) => node.kind === "packageResourceDecl");
+    if (!declaration) throw new Error("Expected a package declaration");
+    const text = (node: typeof declaration) => authored.slice(node.start, node.end);
+    const literals = declaration.children.filter((node) => node.kind === "stringLiteral");
+    packageModel = {
+      generatedBy: "qx-scaffold-v1",
+      name: text(declaration.children.find((node) => node.kind === "identifier")!),
+      id: JSON.parse(text(literals[0])),
+      revision: JSON.parse(text(literals[1])),
+      exports: [],
+    };
+    for (const node of walkSyntax(declaration)) {
+      if (!["packageFunctionExport", "packageOperationExport", "packageConstructorExport"].includes(node.kind))
+        continue;
+      const name = safeName(text(node.children.find((child) => child.kind === "identifier")!));
+      const id = JSON.parse(text(node.children.find((child) => child.kind === "stringLiteral")!));
+      if (packageModel.exports.some((entry) => entry.id === id || entry.name === name))
+        throw new Error("Duplicate package export name or ID");
+      const migration = catalog.migrations.find((entry) => entry.implementation.exportId === id);
+      packageModel.exports.push({
+        name,
+        id,
+        file: migration?.implementation.file ?? `src/impl/${name}.ts`,
+        ...(migration ? { migration: true } : {}),
+      });
+    }
+    {
+      const name = safeName(spec.name);
+      if (!spec.id || packageModel.exports.some((entry) => entry.id === spec.id || entry.name === name))
+        throw new Error("New export requires a unique name and ID");
+      const declaration = spec.declaration ?? `function ${name} id ${JSON.stringify(spec.id)} : unit -> unit;`;
+      const parsed = parseQx(`package Scaffold id "scaffold" revision "scaffold@1" { ${declaration} }`);
+      const exports = [...walkSyntax(parsed.root)].filter((node) =>
+        ["packageFunctionExport", "packageOperationExport", "packageConstructorExport"].includes(node.kind),
+      );
+      if (parsed.diagnostics.length || exports.length !== 1)
+        throw new Error("Expected one valid package export declaration");
+      const wrapped = `package Scaffold id "scaffold" revision "scaffold@1" { ${declaration} }`;
+      const node = exports[0];
+      const derived = [...walkSyntax(node)].some((entry) => entry.kind === "eventClause");
+      if (command === "migration" && (node.kind !== "packageFunctionExport" || spec.declaration))
+        throw new Error(
+          "Migration exports use the scaffold's unit function declaration and dedicated migration entrypoint",
+        );
+      if (
+        wrapped.slice(
+          node.children.find((child) => child.kind === "identifier")!.start,
+          node.children.find((child) => child.kind === "identifier")!.end,
+        ) !== name ||
+        JSON.parse(
+          wrapped.slice(
+            node.children.find((child) => child.kind === "stringLiteral")!.start,
+            node.children.find((child) => child.kind === "stringLiteral")!.end,
+          ),
+        ) !== spec.id
+      )
+        throw new Error("Declaration name/ID must match its registration");
+      files.push({
+        file: prefix + "package.qx",
+        edits: [
+          { operation: "append", parent: { kind: "packageResourceDecl", id: packageModel.id }, source: declaration },
+        ],
+      });
+      const file = `src/${command === "migration" ? "migrations" : "impl"}/${name}.ts`;
+      const implementation =
+        command === "migration"
+          ? `import type {MigrationContext} from "@quixos/camino-package-runtime";\nexport const handler = async (_context: MigrationContext): Promise<void> => { throw new Error(${JSON.stringify(`Implement migration ${name}`)}); };\n`
+          : `import type {Implementation} from "../gen/qx.js";\nexport const handler: Implementation[${JSON.stringify(name)}] = ${derived ? '{kind: "derived", get: ' : ""}async (_context) => { throw new Error(${JSON.stringify(`Implement ${name}`)}); }${derived ? "}" : ""};\n`;
+      create(file, implementation);
+      packageModel.exports.push({ name, id: spec.id, file, ...(command === "migration" ? { migration: true } : {}) });
+      if (command === "migration") {
+        if (!spec.migration)
+          throw new Error("Migration scaffold requires retained contracts and an explicit transition");
+        const { contracts, ...transition } = spec.migration;
+        for (const [digest, contract] of Object.entries(contracts)) {
+          if (
+            contentDigest(contract) !== digest ||
+            (catalog.contracts[digest] && contentDigest(catalog.contracts[digest]) !== digest)
+          )
+            throw new Error("Retained migration contract mismatch");
+          catalog.contracts[digest] = contract;
+        }
+        catalog.migrations.push({
+          ...transition,
+          implementation: { exportId: spec.id, file, digest: contentDigest(implementation) },
+        });
+      }
+    }
+  }
+  validateMigrationCatalog(catalog, new Set(packageModel.exports.map((entry) => entry.id)));
+  generated("quixos.migrations.json", json(catalog));
+  if (command !== "package") {
+    const entry = packageModel.exports.at(-1)!;
+    const file = prefix + "src/server.ts";
+    const before = await fs.readFile(path.join(root, file), "utf8");
+    files.push({
+      file,
+      expected: before,
+      replace: addImplementation(
+        before,
+        "createRuntime",
+        entry.name,
+        `./${entry.file.slice(4, -3)}.js`,
+        !!entry.migration,
+      ),
+    });
+    if (entry.migration) {
+      const file = prefix + "src/migrate.ts";
+      const before = await fs.readFile(path.join(root, file), "utf8");
+      files.push({
+        file,
+        expected: before,
+        replace: addImplementation(before, "serveMigration", entry.id, `./${entry.file.slice(4, -3)}.js`),
+      });
+    }
+  } else {
+    create(
+      "src/server.ts",
+      `import {servePackageRuntime} from "@quixos/camino-package-runtime";\nimport {createRuntime} from "./gen/qx.js";\n` +
+        packageModel.exports
+          .filter((entry) => !entry.migration)
+          .map(
+            (entry, index) =>
+              `import {handler as impl${index}} from ${JSON.stringify(`./${entry.file.slice(4, -3)}.js`)};\n`,
+          )
+          .join("") +
+        `servePackageRuntime(createRuntime({\n` +
+        packageModel.exports
+          .map(
+            (entry) =>
+              `  ${JSON.stringify(entry.name)}: ${entry.migration ? 'async () => { throw new Error("Migration-only export"); }' : `impl${packageModel.exports.filter((value) => !value.migration).indexOf(entry)}`},`,
+          )
+          .join("\n") +
+        `\n}));\n`,
+    );
+    const migrations = packageModel.exports.filter((entry) => entry.migration);
+    create(
+      "src/migrate.ts",
+      `import {serveMigration} from "@quixos/camino-package-runtime";\n` +
+        migrations
+          .map(
+            (entry, index) =>
+              `import {handler as impl${index}} from ${JSON.stringify(`./${entry.file.slice(4, -3)}.js`)};\n`,
+          )
+          .join("") +
+        `await serveMigration({${migrations.map((entry, index) => `${JSON.stringify(entry.id)}: impl${index}`).join(", ")}});\n`,
+    );
+  }
+  generated(
+    "descriptor.quixos-package.txtpb",
+    `# Generated by qx-scaffold-v1\npackage_id: ${JSON.stringify(packageModel.id)}\npackage_revision_id: ${JSON.stringify(packageModel.revision)}\nruntime_protocol_version: "quixos-capabilities-v1"\n` +
+      packageModel.exports
+        .map(
+          (entry) =>
+            `exports: { export_id: ${JSON.stringify(entry.id)} runtime_symbol: ${JSON.stringify(entry.name)} }\n`,
+        )
+        .join(""),
+  );
+  if (spec.initialFiles) {
+    if (command !== "package") throw new Error("initialFiles is only valid when creating a package");
+    const authored = spec.initialFiles["package.qx"];
+    if (authored !== undefined) {
+      const parsed = parseQx(authored);
+      const declaration = [...walkSyntax(parsed.root)].find((n) => n.kind === "packageResourceDecl");
+      const literals = declaration?.children.filter((n) => n.kind === "stringLiteral") ?? [];
+      const identifier = declaration?.children.find((n) => n.kind === "identifier");
+      if (
+        parsed.diagnostics.length ||
+        literals.length !== 2 ||
+        !identifier ||
+        authored.slice(identifier.start, identifier.end) !== spec.name ||
+        JSON.parse(authored.slice(literals[0].start, literals[0].end)) !== spec.id ||
+        JSON.parse(authored.slice(literals[1].start, literals[1].end)) !== spec.revision
+      )
+        throw new Error("Initial package declaration must match the provisioned name, ID and revision");
+    }
+    for (const [file, content] of Object.entries(spec.initialFiles)) {
+      if (
+        typeof content !== "string" ||
+        ["quixos.lock", "flake.nix", "quixos.toolchain.json", "package.json"].includes(file)
+      )
+        throw new Error(`Not an initial authored file: ${file}`);
+      if (file === "quixos.check.json") {
+        const check = JSON.parse(content);
+        if (
+          check.backend !== "typescript" ||
+          check.bindingOutput !== "src/gen/qx.ts" ||
+          Object.keys(check).some((key) => !["backend", "bindingOutput", "options"].includes(key))
+        )
+          throw new Error(
+            "Initial check configuration may customize binding options, not the scaffold verification backend or output",
+          );
+      }
+      const existing = files.findIndex((entry) => entry.file === prefix + file);
+      if (existing >= 0) files.splice(existing, 1);
+      create(file, content);
+    }
+    // A composed React recipe supplies its own modules and complete server.
+    if (reactRecipe(spec)) {
+      for (const file of ["src/component.tsx", "src/impl/sourceGet.ts", "descriptor.quixos-package.txtpb"])
+        if (!(file in spec.initialFiles)) {
+          const index = files.findIndex((entry) => entry.file === prefix + file);
+          if (index >= 0) files.splice(index, 1);
+        }
+    }
+  }
+  return { kind: "package", source: spec.source, resourceRoot: spec.directory, validation: "syntax", files };
+};
+
+const reactRecipe = (spec: ScaffoldRecipe) =>
+  spec.template === "typescript-react" && spec.initialFiles?.["package.qx"] && spec.initialFiles?.["src/server.ts"];

src/capability-language/scaffold.ts

@@ -0,0 +1,82 @@
+import { lstat, open, rename, unlink } from "node:fs/promises";
+import path from "node:path";
+import { randomUUID } from "node:crypto";
+import { addWorkspaceImport } from "./source.js";
+import { readQxSource } from "./source-loader.js";
+import { compileWorkspaceRepository, type CapabilityRepositoryResolver } from "./assembly.js";
+
+export const planAtomScaffold = (workspace: string, name: string, id: string) => {
+  if (!/^[A-Z][A-Za-z0-9]*$/.test(name)) throw new Error("Atom name must be PascalCase");
+  if (!id.trim()) throw new Error("Atom ID must not be empty");
+  const fileName = `${name}.qx`;
+  return {
+    before: workspace,
+    workspace: addWorkspaceImport(workspace, fileName),
+    fileName,
+    fragment: `fragment {\n  atom ${name} id ${JSON.stringify(id)};\n}\n`,
+  };
+};
+
+/** Validate an in-memory proposal before creating files. Never replace a fragment. */
+export const scaffoldAtom = async (options: {
+  root: string;
+  name: string;
+  id: string;
+  write: boolean;
+  resolveResource: CapabilityRepositoryResolver;
+}) => {
+  const before = await readQxSource(options.root, "workspace.qx");
+  const plan = planAtomScaffold(before, options.name, options.id);
+  const fragmentPath = path.join(options.root, plan.fileName);
+  try {
+    await lstat(fragmentPath);
+    throw new Error(`Scaffold target already exists: ${plan.fileName}`);
+  } catch (error) {
+    if ((error as NodeJS.ErrnoException).code !== "ENOENT") throw error;
+  }
+  const observed = new Map<string, string>();
+  await compileWorkspaceRepository({
+    rootDirectory: options.root,
+    resolveResource: options.resolveResource,
+    readSource: async (name) => {
+      if (name === "workspace.qx") return plan.workspace;
+      if (name === plan.fileName) return plan.fragment;
+      const text = await readQxSource(options.root, name);
+      observed.set(name, text);
+      return text;
+    },
+  });
+  if (!options.write) return plan;
+  const workspacePath = path.join(options.root, "workspace.qx");
+  const temporary = path.join(options.root, `.qx-scaffold-${randomUUID()}.tmp`);
+  let createdFragment = false;
+  let createdTemporary = false;
+  try {
+    const fragment = await open(fragmentPath, "wx");
+    createdFragment = true;
+    try {
+      await fragment.writeFile(plan.fragment);
+    } finally {
+      await fragment.close();
+    }
+    const file = await open(temporary, "wx", (await lstat(workspacePath)).mode);
+    createdTemporary = true;
+    try {
+      await file.writeFile(plan.workspace);
+    } finally {
+      await file.close();
+    }
+    observed.set("workspace.qx", before);
+    for (const [name, text] of observed) {
+      if ((await readQxSource(options.root, name)) !== text)
+        throw new Error(`QX source changed during scaffolding: ${name}`);
+    }
+    await rename(temporary, workspacePath);
+    createdTemporary = false;
+    createdFragment = false;
+  } finally {
+    if (createdTemporary) await unlink(temporary);
+    if (createdFragment) await unlink(fragmentPath);
+  }
+  return plan;
+};

src/capability-language/source-loader.ts

@@ -0,0 +1,81 @@
+import { lstat, readFile } from "node:fs/promises";
+import path from "node:path";
+import { parseQx, validateQxImportPath, walkSyntax } from "./source.js";
+
+export const readQxSource = async (root: string, name: string) => {
+  validateQxImportPath(name);
+  let current = path.resolve(root);
+  const segments = name.split("/");
+  for (const [index, segment] of segments.entries()) {
+    current = path.join(current, segment);
+    const stat = await lstat(current);
+    if (stat.isSymbolicLink() || (index === segments.length - 1 ? !stat.isFile() : !stat.isDirectory()))
+      throw new Error(`QX imports must be ordinary files beneath ordinary directories: ${name}`);
+  }
+  return readFile(current, "utf8");
+};
+
+/** Local imports share one workspace scope; paths are always repository-relative. */
+export const resolveQxSources = async (read: (name: string) => Promise<string>, entry = "workspace.qx") => {
+  const files = new Map<string, string>();
+  const active: string[] = [];
+  const visited = new Set<string>();
+  const segments: { start: number; end: number; fileName: string; sourceStart: number }[] = [];
+  let source = "";
+  const append = (fileName: string, text: string, sourceStart: number) => {
+    segments.push({ start: source.length, end: source.length + text.length, fileName, sourceStart });
+    source += text;
+  };
+  const visit = async (name: string, root: boolean) => {
+    validateQxImportPath(name);
+    if (active.includes(name)) throw new Error(`QX import cycle: ${[...active, name].join(" -> ")}`);
+    if (visited.has(name)) return;
+    const text = await read(name);
+    const syntax = parseQx(text, name);
+    if (syntax.diagnostics.length)
+      throw new Error(syntax.diagnostics.map((d) => `${name}:${d.line}:${d.column + 1}: ${d.message}`).join("\n"));
+    const declaration = syntax.root.children[0]!;
+    if (declaration.kind !== (root ? "workspaceDecl" : "fragmentDecl"))
+      throw new Error(`${name}: expected ${root ? "workspace" : "fragment"} document`);
+    files.set(name, text);
+    active.push(name);
+    visited.add(name);
+    const braces = syntax.tokens.filter((token) => !token.trivia);
+    let cursor = root ? 0 : braces.find((token) => token.kind === "LBRACE")!.end;
+    const end = root ? text.length : braces.filter((token) => token.kind === "RBRACE").at(-1)!.start;
+    for (const node of walkSyntax(declaration)) {
+      if (node.kind !== "sourceImportDecl") continue;
+      append(name, text.slice(cursor, node.start), cursor);
+      const literal = node.children.find((child) => child.kind === "stringLiteral")!;
+      // Separators prevent adjacent tokens/comments joining across files.
+      append(name, "\n", node.start);
+      await visit(JSON.parse(text.slice(literal.start, literal.end)), false);
+      append(name, "\n", node.end);
+      cursor = node.end;
+    }
+    append(name, text.slice(cursor, end), cursor);
+    active.pop();
+  };
+  await visit(entry, true);
+  return {
+    source,
+    sourceFiles: [...files.keys()],
+    files,
+    originalPosition(line: number, column: number) {
+      const lines = source.split("\n");
+      const offset =
+        lines.slice(0, line - 1).reduce((sum, value) => sum + value.length + 1, 0) +
+        [...(lines[line - 1] ?? "")].slice(0, column).join("").length;
+      const segment = segments.find((entry) => entry.start <= offset && entry.end > offset);
+      if (!segment) return { fileName: entry, line, column };
+      const prefix = files.get(segment.fileName)!.slice(0, segment.sourceStart + offset - segment.start);
+      return {
+        fileName: segment.fileName,
+        line: prefix.split("\n").length,
+        column: prefix.length - prefix.lastIndexOf("\n") - 1,
+      };
+    },
+  };
+};
+
+export const loadQxSources = (root: string) => resolveQxSources((name) => readQxSource(root, name));

src/capability-language/source.ts

@@ -0,0 +1,156 @@
+import { ParserRuleContext } from "antlr4ng";
+import { parseDocument } from "./parser.js";
+import { QuixosCapabilityParser } from "./generated/QuixosCapabilityParser.js";
+
+/** Offsets and columns use UTF-16, as do JavaScript and LSP. End is exclusive. */
+export type SourceRange = { start: number; end: number };
+export type SourceEdit = SourceRange & { text: string };
+export type SyntaxNode = SourceRange & { kind: string; children: SyntaxNode[] };
+
+export const parseQx = (source: string, fileName = "<memory>") => {
+  const parsed = parseDocument(source, fileName);
+  // ANTLR indexes Unicode code points; editors index UTF-16 code units.
+  const offsets = [0];
+  for (const character of source) offsets.push(offsets[offsets.length - 1]! + character.length);
+  const offset = (index: number) => offsets[Math.max(0, index)] ?? source.length;
+  const node = (context: ParserRuleContext): SyntaxNode => ({
+    kind: QuixosCapabilityParser.ruleNames[context.ruleIndex]!,
+    start: offset(context.start?.start ?? 0),
+    end: offset((context.stop?.stop ?? -1) + 1),
+    children: context.children.flatMap((child) => (child instanceof ParserRuleContext ? [node(child)] : [])),
+  });
+  return {
+    source,
+    fileName,
+    root: node(parsed.tree),
+    diagnostics: parsed.diagnostics.map((diagnostic) => {
+      const line = source.split("\n")[diagnostic.line - 1] ?? "";
+      return { ...diagnostic, column: [...line].slice(0, diagnostic.column).join("").length };
+    }),
+    tokens: parsed.tokens
+      .getTokens()
+      .filter((token) => token.type !== -1)
+      .map((token) => ({
+        kind: QuixosCapabilityParser.symbolicNames[token.type] ?? "token",
+        start: offset(token.start),
+        end: offset(token.stop + 1),
+        text: token.text ?? "",
+        trivia: token.channel !== 0,
+      })),
+  };
+};
+
+/** Edits refer to one immutable source snapshot; overlapping edits are errors. */
+export const applySourceEdits = (source: string, edits: readonly SourceEdit[]) => {
+  const sorted = [...edits].sort((a, b) => a.start - b.start || a.end - b.end);
+  let end = 0;
+  let previousStart = -1;
+  let result = "";
+  for (const edit of sorted) {
+    if (
+      !Number.isInteger(edit.start) ||
+      !Number.isInteger(edit.end) ||
+      edit.start < end ||
+      edit.start === previousStart ||
+      edit.end < edit.start ||
+      edit.end > source.length
+    ) {
+      throw new Error("Invalid or overlapping source edits");
+    }
+    result += source.slice(end, edit.start) + edit.text;
+    end = edit.end;
+    previousStart = edit.start;
+  }
+  return result + source.slice(end);
+};
+
+export const walkSyntax = function* (node: SyntaxNode): Generator<SyntaxNode> {
+  yield node;
+  for (const child of node.children) yield* walkSyntax(child);
+};
+
+export const lintQx = (source: string, fileName = "<memory>") => {
+  const syntax = parseQx(source, fileName);
+  const diagnostics = syntax.diagnostics.map((entry) => ({ ...entry, severity: "error" as "error" | "warning" }));
+  if (diagnostics.length) return diagnostics;
+  const seen = new Set<string>();
+  for (const node of walkSyntax(syntax.root)) {
+    if (node.kind !== "sourceImportDecl") continue;
+    const literal = node.children.find((child) => child.kind === "stringLiteral")!;
+    const importPath: string = JSON.parse(source.slice(literal.start, literal.end));
+    let message: string | undefined;
+    let code = "invalid-source-import";
+    try {
+      validateQxImportPath(importPath);
+    } catch (error) {
+      message = (error as Error).message;
+    }
+    if (!message && seen.has(importPath)) {
+      code = "duplicate-source-import";
+      message = `Repeated local import ${importPath}`;
+    }
+    seen.add(importPath);
+    if (message) {
+      const prefix = source.slice(0, node.start);
+      diagnostics.push({
+        phase: "syntax",
+        code,
+        message,
+        fileName,
+        line: prefix.split("\n").length,
+        column: prefix.length - prefix.lastIndexOf("\n") - 1,
+        severity: code === "duplicate-source-import" ? "warning" : "error",
+      });
+    }
+  }
+  return diagnostics;
+};
+
+/** Conservative formatter: indentation only, preserving strings and comments verbatim. */
+export const formatQx = (source: string) => {
+  const syntax = parseQx(source);
+  if (syntax.diagnostics.length) throw new Error("Cannot format QX with syntax errors");
+  const edits: SourceEdit[] = [];
+  let depth = 0;
+  let lineStart = 0;
+  for (const token of syntax.tokens) {
+    if (token.kind === "WS") continue;
+    lineStart = source.lastIndexOf("\n", token.start - 1) + 1;
+    if (/^[ \t]*$/.test(source.slice(lineStart, token.start))) {
+      const indentation = "  ".repeat(Math.max(0, depth - (token.kind === "RBRACE" ? 1 : 0)));
+      if (source.slice(lineStart, token.start) !== indentation)
+        edits.push({ start: lineStart, end: token.start, text: indentation });
+    }
+    if (!token.trivia) {
+      if (token.kind === "LBRACE") depth++;
+      if (token.kind === "RBRACE") depth--;
+    }
+  }
+  return applySourceEdits(source, edits);
+};
+
+export const addWorkspaceImport = (source: string, importPath: string) => {
+  validateQxImportPath(importPath);
+  const syntax = parseQx(source);
+  if (syntax.diagnostics.length || syntax.root.children[0]?.kind !== "workspaceDecl")
+    throw new Error("Expected a syntactically valid workspace");
+  for (const node of walkSyntax(syntax.root)) {
+    if (node.kind === "sourceImportDecl") {
+      const literal = node.children.find((child) => child.kind === "stringLiteral")!;
+      if (JSON.parse(source.slice(literal.start, literal.end)) === importPath) return source;
+    }
+  }
+  const brace = syntax.tokens.find((token) => token.kind === "LBRACE")!;
+  const newline = source.includes("\r\n") ? "\r\n" : "\n";
+  return applySourceEdits(source, [
+    { start: brace.end, end: brace.end, text: `${newline}  import ${JSON.stringify(importPath)};` },
+  ]);
+};
+
+export const validateQxImportPath = (value: string) => {
+  if (
+    !/^(?:[A-Za-z0-9_-][A-Za-z0-9_.-]*\/)*[A-Za-z0-9_-][A-Za-z0-9_.-]*\.qx$/.test(value) ||
+    value.split("/").some((part) => part === "." || part === "..")
+  )
+    throw new Error(`Invalid repository-relative QX import path: ${value}`);
+};

src/capability-language/structural-edits.ts

@@ -0,0 +1,263 @@
+import { CharStream, CommonTokenStream } from "antlr4ng";
+import { QuixosLockLexer } from "../resource-lock/generated/QuixosLockLexer.js";
+import { QuixosLockParser } from "../resource-lock/generated/QuixosLockParser.js";
+import { parseQuixosLockDocument } from "../resource-lock/parser.js";
+import { parseQx, walkSyntax, applySourceEdits, type SyntaxNode } from "./source.js";
+
+export type StructuralSelector = { kind: string; id?: string; name?: string; names?: string[] };
+export type StructuralEdit =
+  | { operation: "append"; parent: StructuralSelector; source: string }
+  | { operation: "replace"; target: StructuralSelector; source: string }
+  | { operation: "remove"; target: StructuralSelector }
+  | { operation: "import"; kind: "interface" | "package"; name: string }
+  | { operation: "semantic-major"; target: StructuralSelector; major: number }
+  | { operation: "conformance-id"; target: StructuralSelector; id: string }
+  | { operation: "quixos-pin"; source: { repository: string; commit: string } }
+  | {
+      operation: "dependency";
+      kind: "interface" | "package";
+      name: string;
+      source: { repository: string; commit: string } | null;
+    };
+
+// Deliberately exclude valueType/identifier/stringLiteral: callers operate on
+// declaration structure, not arbitrary token offsets or lockfile text patches.
+const selectable = new Set([
+  "workspaceDecl",
+  "fragmentDecl",
+  "interfaceResourceDecl",
+  "packageResourceDecl",
+  "atomDecl",
+  "valueMember",
+  "relationshipMember",
+  "operationMember",
+  "packageOperationExport",
+  "packageFunctionExport",
+  "packageConstructorExport",
+  "conformanceDecl",
+  "stateDecl",
+  "edgeDecl",
+  "constructorBindingDecl",
+  "resourceImportDecl",
+  "sourceImportDecl",
+  "operationBindingDecl",
+]);
+
+/** Bind only the template root identity; schema/atom identities are reusable.
+ * The revision's real identity is derived from its containing commit at compile time. */
+export const instantiateWorkspaceIdentity = (source: string, workspaceId: string): string => {
+  if (!/^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$/.test(workspaceId))
+    throw new Error("Workspace identity must be a UUID");
+  const syntax = parseQx(source);
+  if (syntax.diagnostics.length) throw new Error("Cannot instantiate a malformed template workspace");
+  const declaration = syntax.root.children.find((node) => node.kind === "workspaceDecl");
+  const literals = declaration?.children.filter((node) => node.kind === "stringLiteral");
+  if (!literals || literals.length !== 3) throw new Error("Template must contain a workspace declaration");
+  return applySourceEdits(source, [
+    { ...literals[0], text: JSON.stringify(workspaceId) },
+    { ...literals[1], text: JSON.stringify(`workspace-revision:${workspaceId}:source`) },
+  ]);
+};
+
+const select = (
+  source: string,
+  selector: StructuralSelector,
+): { node: SyntaxNode; syntax: ReturnType<typeof parseQx> } => {
+  if (!selectable.has(selector.kind)) throw new Error(`Unsupported structural selector ${selector.kind}`);
+  const syntax = parseQx(source);
+  if (syntax.diagnostics.length) throw new Error("Cannot scaffold syntactically invalid QX");
+  const matches = [...walkSyntax(syntax.root)].filter((node) => {
+    if (node.kind !== selector.kind) return false;
+    if (
+      selector.name &&
+      !node.children.some(
+        (child) => child.kind === "identifier" && source.slice(child.start, child.end) === selector.name,
+      )
+    )
+      return false;
+    if (
+      selector.names &&
+      JSON.stringify(
+        node.children
+          .filter((child) => child.kind === "identifier")
+          .map((child) => source.slice(child.start, child.end)),
+      ) !== JSON.stringify(selector.names)
+    )
+      return false;
+    if (selector.id) {
+      // Only an explicit ID field counts, not a coincidentally equal revision,
+      // default value, nested declaration, or comment.
+      const tokens = syntax.tokens.filter(
+        (token) => !token.trivia && token.start >= node.start && token.end <= node.end,
+      );
+      const literal = node.children.find(
+        (child) =>
+          child.kind === "stringLiteral" &&
+          tokens.some((token, index) => token.start === child.start && tokens[index - 1]?.kind === "ID"),
+      );
+      if (!literal || JSON.parse(source.slice(literal.start, literal.end)) !== selector.id) return false;
+    }
+    return true;
+  });
+  if (matches.length !== 1) throw new Error(`Structural selector must resolve exactly once (found ${matches.length})`);
+  return { node: matches[0], syntax };
+};
+
+/** Comment-preserving structural edits; every result is parsed before returning. */
+export const editStructure = (source: string, edit: StructuralEdit): string => {
+  if (edit.operation === "quixos-pin") {
+    const parsed = parseQuixosLockDocument(source);
+    if (!parsed.ok || parsed.document.kind !== "root") throw new Error("Quixos pins belong in a valid root lockfile");
+    const parser = new QuixosLockParser(new CommonTokenStream(new QuixosLockLexer(CharStream.fromString(source))));
+    const entries = parser.document().quixosEntry();
+    if (entries.length !== 1) throw new Error("Expected one Quixos source declaration");
+    const literals = entries[0].quixosSourceBlock().stringLiteral();
+    const offsets = [0];
+    for (const character of source) offsets.push(offsets[offsets.length - 1] + character.length);
+    const result = applySourceEdits(source, [
+      {
+        start: offsets[literals[0].start!.start],
+        end: offsets[literals[0].stop!.stop + 1],
+        text: JSON.stringify(edit.source.repository),
+      },
+      {
+        start: offsets[literals[literals.length - 1].start!.start],
+        end: offsets[literals[literals.length - 1].stop!.stop + 1],
+        text: JSON.stringify(edit.source.commit),
+      },
+    ]);
+    const checked = parseQuixosLockDocument(result);
+    if (!checked.ok)
+      throw new Error(`Invalid Quixos pin: ${checked.diagnostics.map((entry) => entry.message).join("; ")}`);
+    return result;
+  }
+  if (edit.operation === "import") {
+    if (!["interface", "package"].includes(edit.kind) || !/^[A-Za-z_][A-Za-z0-9_]*$/.test(edit.name))
+      throw new Error("Invalid resource import");
+    const syntax = parseQx(source);
+    if (syntax.diagnostics.length) throw new Error("Cannot scaffold invalid QX");
+    const text = `import ${edit.kind} ${edit.name};`;
+    if (
+      [...walkSyntax(syntax.root)].some(
+        (entry) =>
+          entry.kind === "resourceImportDecl" && source.slice(entry.start, entry.end).replace(/\s+/g, " ") === text,
+      )
+    )
+      return source;
+    const root = syntax.root.children[0];
+    const position = ["workspaceDecl", "fragmentDecl"].includes(root.kind)
+      ? syntax.tokens.find((token) => token.kind === "LBRACE")!.end
+      : root.start;
+    const result = applySourceEdits(source, [{ start: position, end: position, text: `\n${text}\n` }]);
+    if (parseQx(result).diagnostics.length) throw new Error("Invalid resource import position");
+    return result;
+  }
+  if (edit.operation === "dependency") {
+    const parsed = parseQuixosLockDocument(source);
+    if (!parsed.ok) throw new Error("Cannot scaffold an invalid lockfile");
+    if (!["interface", "package"].includes(edit.kind) || !/^[A-Za-z_][A-Za-z0-9_]*$/.test(edit.name))
+      throw new Error("Invalid dependency selector");
+    const parser = new QuixosLockParser(new CommonTokenStream(new QuixosLockLexer(CharStream.fromString(source))));
+    const tree = parser.document();
+    const offsets = [0];
+    for (const character of source) offsets.push(offsets[offsets.length - 1] + character.length);
+    const entries = tree
+      .resourceEntry()
+      .filter((entry) => entry.resourceKind().getText() === edit.kind && entry.identifier().getText() === edit.name);
+    if (entries.length > 1) throw new Error("Ambiguous dependency selector");
+    const entry = entries[0];
+    const replacement = edit.source
+      ? `${edit.kind} ${edit.name} source {\n  repository ${JSON.stringify(edit.source.repository)};\n  commit ${JSON.stringify(edit.source.commit)};\n}`
+      : "";
+    if (!entry && !edit.source) throw new Error("Cannot remove an absent dependency");
+    const start = entry ? offsets[entry.start!.start] : offsets[tree.RBRACE().symbol.start];
+    const end = entry ? offsets[entry.stop!.stop + 1] : start;
+    const result = applySourceEdits(source, [{ start, end, text: entry ? replacement : `${replacement}\n` }]);
+    const checked = parseQuixosLockDocument(result);
+    if (!checked.ok)
+      throw new Error(`Invalid dependency change: ${checked.diagnostics.map((entry) => entry.message).join("; ")}`);
+    return result;
+  }
+  const { node, syntax } = select(source, edit.operation === "append" ? edit.parent : edit.target);
+  let result: string;
+  if (edit.operation === "semantic-major") {
+    if (
+      !["conformanceDecl", "packageResourceDecl"].includes(node.kind) ||
+      !Number.isSafeInteger(edit.major) ||
+      edit.major < 1
+    )
+      throw new Error("Semantic major requires a package/conformance and positive integer");
+    const tokens = syntax.tokens.filter((token) => !token.trivia && token.start >= node.start && token.end <= node.end);
+    const marker = tokens.findIndex((token) => token.kind === "SEMANTIC_MAJOR");
+    const value = marker < 0 ? undefined : tokens[marker + 1];
+    const brace = tokens.find((token) => token.kind === "LBRACE")!;
+    result = applySourceEdits(source, [
+      {
+        start: value?.start ?? brace.start,
+        end: value?.end ?? brace.start,
+        text: value ? String(edit.major) : `semantic-major ${edit.major} `,
+      },
+    ]);
+  } else if (edit.operation === "conformance-id") {
+    if (node.kind !== "conformanceDecl" || !edit.id)
+      throw new Error("Identity enrollment requires a conformance and stable ID");
+    const existing = node.children.find((entry) => entry.kind === "stringLiteral");
+    if (existing) {
+      if (JSON.parse(source.slice(existing.start, existing.end)) !== edit.id)
+        throw new Error("Cannot change an enrolled conformance identity; create a new conformance explicitly");
+      return source;
+    }
+    const identifiers = node.children.filter((entry) => entry.kind === "identifier");
+    const position = identifiers[identifiers.length - 1].end;
+    result = applySourceEdits(source, [{ start: position, end: position, text: ` id ${JSON.stringify(edit.id)}` }]);
+  } else if (edit.operation === "append") {
+    const closing = syntax.tokens.find((token) => token.kind === "RBRACE" && token.end === node.end);
+    if (!closing) throw new Error("Append requires a declaration with a body");
+    result = applySourceEdits(source, [{ start: closing.start, end: closing.start, text: `\n${edit.source}\n` }]);
+  } else {
+    // A resource parser node includes imports/external declarations preceding
+    // its header. Replacing the declaration must not delete that preamble.
+    const identifier = node.children.find((child) => child.kind === "identifier");
+    const header =
+      ["packageResourceDecl", "interfaceResourceDecl"].includes(node.kind) && identifier
+        ? syntax.tokens
+            .filter(
+              (token) =>
+                token.start >= node.start &&
+                token.end <= identifier.start &&
+                token.kind === (node.kind === "packageResourceDecl" ? "PACKAGE" : "INTERFACE"),
+            )
+            .at(-1)?.start
+        : undefined;
+    const wrapper =
+      edit.operation === "remove" && ["stateDecl", "edgeDecl"].includes(node.kind)
+        ? [...walkSyntax(syntax.root)]
+            .filter(
+              (entry) =>
+                ["conformanceItem", "sharedAttachmentDecl"].includes(entry.kind) &&
+                entry.start <= node.start &&
+                entry.end >= node.end,
+            )
+            .sort((a, b) => a.end - a.start - (b.end - b.start))[0]
+        : undefined;
+    result = applySourceEdits(source, [
+      {
+        start: wrapper?.start ?? header ?? node.start,
+        end: wrapper?.end ?? node.end,
+        text: edit.operation === "replace" ? edit.source : "",
+      },
+    ]);
+  }
+  const checked = parseQx(result);
+  if (checked.diagnostics.length)
+    throw new Error(`Invalid structural change: ${checked.diagnostics.map((entry) => entry.message).join("; ")}`);
+  return result;
+};
+
+export const scaffoldResourceSource = (kind: "interface" | "package", name: string, id: string, revision: string) => {
+  if (!/^[A-Z][A-Za-z0-9]*$/.test(name) || !id || !revision)
+    throw new Error("Resource scaffold requires a PascalCase name and explicit identities");
+  const source = `${kind} ${name} id ${JSON.stringify(id)} revision ${JSON.stringify(revision)} {\n}\n`;
+  if (parseQx(source).diagnostics.length) throw new Error("Invalid resource scaffold");
+  return source;
+};

src/capability-language/structural-plan.ts

@@ -0,0 +1,321 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+import os from "node:os";
+import { randomUUID } from "node:crypto";
+import { contentDigest } from "../capability-model/evolution.js";
+import { editStructure, type StructuralEdit } from "./structural-edits.js";
+import { snapshotRepository, localResourceSnapshots } from "./candidate-check.js";
+import { compileWorkspaceRepository, compileCapabilityResourceRepository } from "./assembly.js";
+import { createGitCapabilityResolver } from "./git-resolver.js";
+import { bindingSchema, generateTypeScriptBindings } from "../bindings/index.js";
+import { parseQx } from "./source.js";
+import { parseQuixosLockDocument } from "../resource-lock/index.js";
+import { withFileLock } from "./file-lock.js";
+
+export type StructuralRequest = {
+  kind: "workspace" | "interface" | "package";
+  source?: { repository: string; commit: string };
+  resourceRoot?: string;
+  validation?: "syntax" | "resource-graph";
+  files: (
+    | { file: string; edits: StructuralEdit[] }
+    | { file: string; create: string }
+    | { file: string; generated: string }
+    | { file: string; expected: string; replace: string }
+  )[];
+};
+type Change = { file: string; before: string | null; after: string; mode: number };
+type Journal = { schemaVersion: 1; id: string; root: string; phase: "prepared" | "complete"; changes: Change[] };
+const safeFile = (file: string) => {
+  if (
+    !/^(?:[A-Za-z0-9_-][A-Za-z0-9_.-]*\/)*(?:\.gitignore|\.yarnrc.yml|[A-Za-z0-9_-][A-Za-z0-9_.-]*\.(?:qx|lock|ts|tsx|css|mjs|json|nix|txtpb|md))$/.test(
+      file,
+    ) ||
+    file.split("/").some((part) => [".git", ".jj", ".quixos", "node_modules"].includes(part))
+  )
+    throw new Error(`Unsafe scaffold path ${file}`);
+};
+const read = async (root: string, file: string): Promise<string | null> => {
+  safeFile(file);
+  const target = path.join(root, file);
+  try {
+    const metadata = await fs.lstat(target);
+    if (!metadata.isFile() || metadata.isSymbolicLink() || !(await fs.realpath(target)).startsWith(`${root}/`))
+      throw new Error(`Scaffold target is not a contained regular file: ${file}`);
+    return await fs.readFile(target, "utf8");
+  } catch (error) {
+    if ((error as NodeJS.ErrnoException).code === "ENOENT") return null;
+    throw error;
+  }
+};
+const containedParent = async (root: string, file: string) => {
+  let current = root;
+  for (const part of file.split("/").slice(0, -1)) {
+    current = path.join(current, part);
+    await fs.mkdir(current).catch((error: NodeJS.ErrnoException) => {
+      if (error.code !== "EEXIST") throw error;
+    });
+    const metadata = await fs.lstat(current);
+    if (!metadata.isDirectory() || metadata.isSymbolicLink())
+      throw new Error("Scaffold parent must be a real directory");
+  }
+};
+const durableJson = async (file: string, value: unknown) => {
+  const temporary = `${file}.${randomUUID()}.tmp`;
+  const handle = await fs.open(temporary, "wx", 0o600);
+  try {
+    await handle.writeFile(`${JSON.stringify(value, null, 2)}\n`);
+    await handle.sync();
+  } finally {
+    await handle.close();
+  }
+  await fs.rename(temporary, file);
+  const directory = await fs.open(path.dirname(file), "r");
+  try {
+    await directory.sync();
+  } finally {
+    await directory.close();
+  }
+};
+
+/** Validate the entire edited resource graph in a private snapshot before writes. */
+export const planStructure = async (rootPath: string, request: StructuralRequest, snapshotMap?: string) => {
+  if (request.validation && !["syntax", "resource-graph"].includes(request.validation))
+    throw new Error("Unknown structural validation mode");
+  const root = await fs.realpath(rootPath);
+  const temporary = await fs.mkdtemp(path.join(os.tmpdir(), "qx-structure-"));
+  try {
+    const snapshot = await snapshotRepository(root, path.join(temporary, "source"));
+    const observed = await Promise.all(
+      snapshot.files.map(async ({ name }) => ({
+        file: name,
+        digest: contentDigest(await fs.readFile(path.join(snapshot.directory, name), "utf8")),
+      })),
+    );
+    const changes: Change[] = [];
+    if (!Array.isArray(request.files) || !request.files.length || request.files.length > 100)
+      throw new Error("Structural plan requires 1–100 files");
+    for (const input of request.files) {
+      safeFile(input.file);
+      if (changes.some((entry) => entry.file === input.file)) throw new Error("Repeated structural file target");
+      const before = await read(root, input.file);
+      let after: string;
+      if ("create" in input) {
+        if (before !== null || typeof input.create !== "string")
+          throw new Error("Scaffold creation cannot replace an existing file");
+        after = input.create;
+      } else if ("replace" in input) {
+        if (before !== input.expected || typeof input.replace !== "string")
+          throw new Error(`Stale imperative edit: ${input.file}`);
+        after = input.replace;
+      } else if ("generated" in input) {
+        const generated = (text: string) =>
+          text.startsWith("// Generated by qx-scaffold-v1\n") ||
+          text.startsWith("# Generated by qx-scaffold-v1\n") ||
+          (() => {
+            try {
+              return JSON.parse(text).generatedBy === "qx-scaffold-v1";
+            } catch {
+              return false;
+            }
+          })();
+        if (
+          typeof input.generated !== "string" ||
+          !generated(input.generated) ||
+          (before !== null && !generated(before))
+        )
+          throw new Error("Only scaffold-owned generated files may be regenerated");
+        after = input.generated;
+      } else {
+        if (before === null || !Array.isArray(input.edits))
+          throw new Error("Structural edit requires an existing source");
+        after = input.edits.reduce(editStructure, before);
+      }
+      if (Buffer.byteLength(after) > 1024 * 1024) throw new Error("Scaffold file exceeds 1 MiB");
+      const mode = before === null ? 0o644 : (await fs.stat(path.join(root, input.file))).mode & 0o777;
+      changes.push({ file: input.file, before, after, mode });
+      await containedParent(snapshot.directory, input.file);
+      await fs.writeFile(path.join(snapshot.directory, input.file), after);
+    }
+    if (request.validation === "syntax") {
+      for (const change of changes) {
+        if (change.file.endsWith(".qx") && parseQx(change.after, change.file).diagnostics.length)
+          throw new Error(`Invalid QX syntax in ${change.file}`);
+        if (change.file.endsWith(".lock") && !parseQuixosLockDocument(change.after, change.file).ok)
+          throw new Error(`Invalid lock syntax in ${change.file}`);
+      }
+    } else {
+      const localMap = path.join(temporary, "local-resources.json");
+      await fs.writeFile(localMap, JSON.stringify(await localResourceSnapshots(root, snapshotMap)));
+      const resolveResource = await createGitCapabilityResolver({
+        checkoutRoot: path.join(temporary, "resources"),
+        snapshotMap: localMap,
+      });
+      if (
+        request.resourceRoot &&
+        !/^[A-Za-z0-9_-][A-Za-z0-9_.-]*(?:\/[A-Za-z0-9_-][A-Za-z0-9_.-]*)*$/.test(request.resourceRoot)
+      )
+        throw new Error("Resource root must be a contained relative directory");
+      const resourceRoot = path.join(snapshot.directory, request.resourceRoot ?? "");
+      if (request.kind === "workspace")
+        await compileWorkspaceRepository({ rootDirectory: resourceRoot, resolveResource });
+      else if (["package", "interface"].includes(request.kind) && request.source) {
+        const compiled = await compileCapabilityResourceRepository({
+          rootDirectory: resourceRoot,
+          kind: request.kind as "package" | "interface",
+          source: { resolver: "git", ...request.source },
+          resolveResource,
+        });
+        if (compiled.resource.kind === "package") {
+          const configuration = JSON.parse(await fs.readFile(path.join(resourceRoot, "quixos.check.json"), "utf8"));
+          const artifacts = [
+            {
+              file: configuration.bindingOutput as string,
+              after: generateTypeScriptBindings(
+                bindingSchema(compiled),
+                compiled.resource.revision.revisionId,
+                configuration.options,
+              ),
+            },
+          ];
+          for (const artifact of artifacts) {
+            const file = request.resourceRoot ? `${request.resourceRoot}/${artifact.file}` : artifact.file;
+            safeFile(file);
+            if (Buffer.byteLength(artifact.after) > 1024 * 1024)
+              throw new Error("Generated scaffold file exceeds 1 MiB");
+            const before = await read(root, file);
+            if (
+              before !== null &&
+              !before.startsWith("// Generated by quixos-codegen-ts.") &&
+              (() => {
+                try {
+                  return JSON.parse(before).generatedBy !== "qx-scaffold-v1";
+                } catch {
+                  return true;
+                }
+              })()
+            )
+              throw new Error(`Refusing to overwrite hand-authored generated artifact ${file}`);
+            const previous = changes.find((entry) => entry.file === file);
+            if (previous) previous.after = artifact.after;
+            else changes.push({ file, before, after: artifact.after, mode: 0o644 });
+          }
+        }
+      } else throw new Error("Resource plans require kind and exact authored source identity");
+    }
+    if (changes.length > 100) throw new Error("Structural plan including generated artifacts exceeds 100 files");
+    // Validation may fetch dependencies; reject edits made while it was running.
+    for (const entry of changes)
+      if ((await read(root, entry.file)) !== entry.before)
+        throw new Error(`Source changed while planning: ${entry.file}`);
+    for (const entry of observed)
+      if (contentDigest(await fs.readFile(path.join(root, entry.file), "utf8")) !== entry.digest)
+        throw new Error(`Validation input changed while planning: ${entry.file}`);
+    return {
+      root,
+      changes,
+      observed,
+      digest: contentDigest(changes),
+      validation: request.validation ?? ("resource-graph" as const),
+    };
+  } finally {
+    await fs.rm(temporary, { recursive: true, force: true });
+  }
+};
+
+/** Replay only exact before/after states. A crash never loses the original text. */
+const replayStructure = async (rootPath: string, id: string) => {
+  const root = await fs.realpath(rootPath);
+  if (!/^[a-f0-9-]{36}$/.test(id)) throw new Error("Invalid scaffold journal ID");
+  const journalPath = path.join(root, ".quixos", "scaffolds", `${id}.json`);
+  const journal = JSON.parse(await fs.readFile(journalPath, "utf8")) as Journal;
+  if (journal.schemaVersion !== 1 || journal.root !== root || journal.id !== id)
+    throw new Error("Scaffold journal identity mismatch");
+  for (const entry of journal.changes) {
+    const current = await read(root, entry.file);
+    if (current !== entry.before && current !== entry.after)
+      throw new Error(
+        `Scaffold conflicts with newer edits: ${entry.file}; original text is retained in ${journalPath}`,
+      );
+  }
+  if (journal.phase === "complete") return { id, journalPath, phase: journal.phase };
+  for (const entry of journal.changes) {
+    if ((await read(root, entry.file)) === entry.after) continue;
+    await containedParent(root, entry.file);
+    const target = path.join(root, entry.file);
+    const temporary = `${target}.qx-${randomUUID()}.tmp`;
+    const handle = await fs.open(temporary, "wx", entry.mode);
+    try {
+      await handle.writeFile(entry.after);
+      await handle.sync();
+    } finally {
+      await handle.close();
+    }
+    if (entry.before === null) {
+      // link is atomic and fails if another author created the destination.
+      await fs.link(temporary, target);
+      await fs.unlink(temporary);
+    } else {
+      if ((await read(root, entry.file)) !== entry.before)
+        throw new Error(`Source changed during scaffold: ${entry.file}`);
+      await fs.rename(temporary, target);
+    }
+    const directory = await fs.open(path.dirname(target), "r");
+    try {
+      await directory.sync();
+    } finally {
+      await directory.close();
+    }
+  }
+  journal.phase = "complete";
+  await durableJson(journalPath, journal);
+  return { id, journalPath, phase: journal.phase };
+};
+
+const withStructureLock = async <T>(root: string, work: () => Promise<T>) => {
+  await containedParent(root, ".quixos/scaffolds/placeholder.json");
+  const lock = path.join(root, ".quixos", "scaffolds", "writer.lock");
+  return withFileLock(lock, work);
+};
+export const resumeStructure = async (rootPath: string, id: string) => {
+  const root = await fs.realpath(rootPath);
+  return withStructureLock(root, () => replayStructure(root, id));
+};
+export const applyStructure = async (plan: Awaited<ReturnType<typeof planStructure>>, id: string = randomUUID()) =>
+  withStructureLock(plan.root, async () => {
+    if (!/^[a-f0-9-]{36}$/.test(id)) throw new Error("Invalid scaffold journal ID");
+    const directory = path.join(plan.root, ".quixos", "scaffolds");
+    try {
+      const existing = JSON.parse(await fs.readFile(path.join(directory, `${id}.json`), "utf8")) as Journal;
+      if (existing.root !== plan.root || contentDigest(existing.changes) !== plan.digest)
+        throw new Error("Scaffold journal identity conflict");
+      for (const entry of plan.observed)
+        if (
+          !plan.changes.some((change) => change.file === entry.file) &&
+          contentDigest(await fs.readFile(path.join(plan.root, entry.file), "utf8")) !== entry.digest
+        )
+          throw new Error(`Stale scaffold validation input: ${entry.file}`);
+      return replayStructure(plan.root, id);
+    } catch (error) {
+      if ((error as NodeJS.ErrnoException).code !== "ENOENT") throw error;
+    }
+    // An unfinished journal must be recovered before another structural mutation.
+    for (const file of await fs.readdir(directory))
+      if (file.endsWith(".json")) {
+        const prior = JSON.parse(await fs.readFile(path.join(directory, file), "utf8")) as Journal;
+        if (prior.phase !== "complete") throw new Error(`Unfinished scaffold ${prior.id}; resume it first`);
+      }
+    for (const entry of plan.changes)
+      if ((await read(plan.root, entry.file)) !== entry.before) throw new Error(`Stale scaffold plan: ${entry.file}`);
+    for (const entry of plan.observed)
+      if (contentDigest(await fs.readFile(path.join(plan.root, entry.file), "utf8")) !== entry.digest)
+        throw new Error(`Stale scaffold validation input: ${entry.file}`);
+    await durableJson(path.join(directory, `${id}.json`), {
+      schemaVersion: 1,
+      id,
+      root: plan.root,
+      phase: "prepared",
+      changes: plan.changes,
+    } satisfies Journal);
+    return replayStructure(plan.root, id);
+  });

src/capability-language/tool-cli.ts

@@ -0,0 +1,533 @@
+#!/usr/bin/env node
+import { readFile, writeFile, mkdtemp, rm, realpath } from "node:fs/promises";
+import { parseQx, formatQx, lintQx } from "./source.js";
+import { scaffoldAtom } from "./scaffold.js";
+import { loadQxSources } from "./source-loader.js";
+import { createGitCapabilityResolver } from "./git-resolver.js";
+import { planEvolution } from "../capability-model/index.js";
+import { snapshotRepository } from "./candidate-check.js";
+import { planPinUpgrades, applyPinUpgrades, discoverUpgradeSpec, type UpgradeSpec } from "./pin-upgrades.js";
+import path from "node:path";
+import os from "node:os";
+import { spawnSync } from "node:child_process";
+import { planStructure, applyStructure, resumeStructure, type StructuralRequest } from "./structural-plan.js";
+import { scaffoldRecipe, type ScaffoldRecipe } from "./scaffold-recipes.js";
+import { checkBundleSources } from "../bindings/bundle-policy.js";
+import { sealMigrations } from "./migration-seal.js";
+import { generatePackageDescriptor } from "../bindings/index.js";
+import { buildCheckedPackage, buildImmutableCandidate, snapshotCommit } from "./checked-build.js";
+import { formatQuixosLock, loadQuixosLock, parseQuixosLockDocument } from "../resource-lock/index.js";
+import { walkSyntax } from "./source.js";
+import { inspectWorkbench } from "./authoring-inspect.js";
+import { authoringContext } from "./authoring-context.js";
+import { convergeAuthoring } from "./authoring-converge.js";
+import { checkAuthoring } from "./authoring-check.js";
+import { authoringWorklist } from "./authoring-worklist.js";
+
+const authorSource = async (root: string) => {
+  const result = spawnSync("git", ["config", "--get", "remote.origin.url"], { cwd: root, encoding: "utf8" });
+  if (result.error || result.status !== 0) throw new Error("Managed resource has no origin");
+  return { repository: result.stdout.trim(), commit: await snapshotCommit(root) };
+};
+
+const readSpec = async (value: string) => {
+  if (value === "-") {
+    let input = "";
+    for await (const chunk of process.stdin) {
+      input += chunk;
+      if (input.length > 1024 * 1024) throw new Error("Scaffold specification exceeds 1 MiB");
+    }
+    return JSON.parse(input);
+  }
+  return JSON.parse(value.trimStart().startsWith("{") ? value : await readFile(value, "utf8"));
+};
+const planSummary = (plan: Awaited<ReturnType<typeof planStructure>>) => ({
+  root: plan.root,
+  validation: plan.validation,
+  changes: plan.changes.map((change) => ({
+    file: change.file,
+    beforeBytes: change.before?.length ?? 0,
+    afterBytes: change.after?.length ?? 0,
+  })),
+  note: "Structural plan only, not implementation verification. Run qx-workspace check while iterating.",
+});
+
+const main = async () => {
+  const [command, ...args] = process.argv.slice(2);
+  if (command === "scaffold-validate-qx") {
+    if (args.length !== 1) throw new Error("scaffold-validate-qx SOURCES_JSON");
+    const sources = JSON.parse(args[0]);
+    if (!Array.isArray(sources) || sources.length > 100) throw new Error("Expected at most 100 scaffold sources");
+    for (const entry of sources) {
+      if (
+        !entry ||
+        typeof entry.file !== "string" ||
+        typeof entry.source !== "string" ||
+        entry.source.length > 1024 * 1024
+      )
+        throw new Error("Invalid scaffold source");
+      const diagnostics = parseQx(entry.source, entry.file).diagnostics;
+      if (diagnostics.length)
+        throw new Error(diagnostics.map((d) => `${entry.file}:${d.line}:${d.column + 1}: ${d.message}`).join("\n"));
+    }
+    process.stdout.write('{"syntaxValid":true,"verificationEvidence":false}\n');
+    return;
+  }
+  if (command === "scaffold-placement-binding") {
+    if (args.length !== 1) throw new Error("scaffold-placement-binding ROOT");
+    const { source } = await loadQxSources(args[0]);
+    const syntax = parseQx(source);
+    const text = (n: { start: number; end: number }) => source.slice(n.start, n.end);
+    const matches: string[] = [];
+    for (const edge of walkSyntax(syntax.root)) {
+      if (edge.kind !== "edgeDecl") continue;
+      for (const endpoint of edge.children.filter((n) => n.kind === "edgeEndpoint")) {
+        const target = endpoint.children.find((n) => n.kind === "targetConstraint");
+        if (
+          !target ||
+          !syntax.tokens.some((t) => t.start >= target.start && t.end <= target.end && t.kind === "INTERFACE") ||
+          !target.children.some((n) => n.kind === "identifier" && text(n) === "WebStudioPlaceable")
+        )
+          continue;
+        const edgeName = text(edge.children.find((n) => n.kind === "identifier")!);
+        const projection = text(endpoint.children.find((n) => n.kind === "identifier")!);
+        matches.push(`bind placements.resolve to edge ${edgeName}.${projection}.resolve;`);
+      }
+    }
+    if (matches.length !== 1)
+      throw new Error(
+        `Expected one canvas placement edge for WebStudioPlaceable; found ${matches.length}. Configure the workspace canvas before adding a bundle.`,
+      );
+    process.stdout.write(JSON.stringify({ binding: matches[0] }) + "\n");
+    return;
+  }
+  if (command === "package-identity") {
+    if (args.length !== 1) throw new Error("usage: quixos-qx package-identity PACKAGE_QX");
+    const authored = await readFile(args[0], "utf8");
+    const syntax = parseQx(authored);
+    const declarations = [...walkSyntax(syntax.root)].filter((node) => node.kind === "packageResourceDecl");
+    if (syntax.diagnostics.length || declarations.length !== 1)
+      throw new Error("Expected one valid package declaration");
+    const literals = declarations[0].children.filter((node) => node.kind === "stringLiteral");
+    process.stdout.write(
+      JSON.stringify({
+        id: JSON.parse(authored.slice(literals[0].start, literals[0].end)),
+        revision: JSON.parse(authored.slice(literals[1].start, literals[1].end)),
+      }) + "\n",
+    );
+    return;
+  }
+  if (command === "package-descriptor") {
+    if (args.length !== 2) throw new Error("usage: quixos-qx package-descriptor SCHEMA REVISION_ID");
+    process.stdout.write(generatePackageDescriptor(JSON.parse(await readFile(args[0], "utf8")), args[1]));
+    return;
+  }
+  if (command === "migration-seal") {
+    if (args.length !== 1) throw new Error("usage: quixos-qx migration-seal PACKAGE_DIRECTORY");
+    process.stdout.write(JSON.stringify(await sealMigrations(args[0])) + "\n");
+    return;
+  }
+  if (command === "bundle-policy") {
+    if (args.length !== 1) throw new Error("usage: quixos-qx bundle-policy SOURCE_DIRECTORY");
+    await checkBundleSources(args[0]);
+    return;
+  }
+  if (command === "worklist" && !args.includes("--help")) {
+    if (args.length !== 1) throw new Error("usage: quixos-qx worklist WORKBENCH");
+    process.stdout.write(`${JSON.stringify(await authoringWorklist(args[0]), null, 2)}\n`);
+    return;
+  }
+  if (["author-check", "author-contract"].includes(command) && !args.includes("--help")) {
+    const [root, output, ...flags] = args;
+    if (!root || !output)
+      throw new Error("usage: quixos-qx author-check ROOT OUTPUT [--baseline FILE] [--reviews FILE]");
+    const options: { baseline?: string; reviews?: string } = {};
+    for (let index = 0; index < flags.length; index += 2) {
+      if (!flags[index + 1]) throw new Error("Missing check option value");
+      if (flags[index] === "--baseline") options.baseline = flags[index + 1];
+      else if (flags[index] === "--reviews") options.reviews = flags[index + 1];
+      else throw new Error(`Unknown check option ${flags[index]}`);
+    }
+    const result = await checkAuthoring(root, output, { ...options, contractOnly: command === "author-contract" });
+    process.stdout.write(`${JSON.stringify(result, null, 2)}\n`);
+    if (result.blockers.length) process.exitCode = 1;
+    return;
+  }
+  if (["converge", "_converge"].includes(command) && !args.includes("--help")) {
+    if (!args.length || args.length > 2)
+      throw new Error("usage: quixos-qx converge WORKBENCH [REGISTERED_DIRECTORY] (join package writers first)");
+    const context = await authoringContext(args[0]);
+    if (command === "converge") {
+      console.error(`[${new Date().toISOString()}] Capture: waiting for coordinator lock (120s limit)`);
+      const result = spawnSync(
+        "flock",
+        [
+          "--exclusive",
+          "--timeout",
+          "120",
+          "--conflict-exit-code",
+          "75",
+          path.join(context.workbench, ".quixos/converge.lock"),
+          process.execPath,
+          process.argv[1],
+          "_converge",
+          context.workbench,
+          ...(args[1] ? [args[1]] : []),
+        ],
+        { stdio: "inherit" },
+      );
+      if (result.error) throw result.error;
+      if (result.status === 75)
+        process.stderr.write(
+          "Timed out after 120 seconds waiting for source capture; inspect the active coordinator. No build lock is held.\n",
+        );
+      process.exitCode = result.status ?? 1;
+      return;
+    }
+    console.error(`[${new Date().toISOString()}] Capture: coordinator lock acquired`);
+    const result = await convergeAuthoring(context.workbench, args[1]);
+    process.stdout.write(`${JSON.stringify(result, null, 2)}\n`);
+    if (!result.converged) process.exitCode = 1;
+    return;
+  }
+  if (command === "check-committed" && !args.includes("--help")) {
+    const [kind, repository, commit, log, ...extra] = args;
+    if (!["workspace", "interface", "package"].includes(kind) || !log || extra.length)
+      throw new Error("usage: quixos-qx check-committed workspace|interface|package REPOSITORY COMMIT LOG_FILE");
+    process.stdout.write(
+      `${await buildImmutableCandidate({ repository, commit }, kind as "workspace" | "interface" | "package", log)}\n`,
+    );
+    return;
+  }
+  if (!command || command === "--help" || args.includes("--help")) {
+    process.stdout.write(
+      "quixos-qx: author-check, author-contract, converge, worklist, inspect, resources, check-committed, source-baseline, scaffold-package, scaffold-interface, scaffold-function, scaffold-dependency, scaffold-structure, scaffold-resume, pin-upgrade, parse, lint, format\n" +
+        "inspect WORKBENCH [RESOURCE] shows provisional contracts, with explicit historical fallback; never verification evidence.\n" +
+        "resources WORKBENCH lists registered editable repositories. Use qx-workspace for the workspace authoring workflow.\n",
+    );
+    return;
+  }
+  if (command === "inspect" || command === "resources") {
+    if (!args[0] || args.length > (command === "inspect" ? 2 : 1))
+      throw new Error(`usage: quixos-qx ${command} WORKBENCH${command === "inspect" ? " [RESOURCE]" : ""}`);
+    const result = command === "inspect" ? await inspectWorkbench(args[0], args[1]) : await authoringContext(args[0]);
+    process.stdout.write(`${JSON.stringify(result, null, 2)}\n`);
+    return;
+  }
+  if (command === "source-baseline") {
+    if (args.length !== 1) throw new Error("usage: quixos-qx source-baseline WORKBENCH");
+    process.stdout.write(`${JSON.stringify(await (await authoringContext(args[0])).baseline())}\n`);
+    return;
+  }
+  if (command === "scaffold-dependency") {
+    const [root, kind, name, ...remaining] = args;
+    let repository: string | undefined, commit: string | undefined;
+    const flags = [...remaining];
+    if (flags.length && !flags[0].startsWith("--")) {
+      repository = flags.shift();
+      commit = flags.shift();
+    } else if (root && ["interface", "package"].includes(kind) && name) {
+      const context = await authoringContext(root);
+      const alias = await realpath(path.join(context.workbench, `${kind}s`, name)).catch(() => null);
+      const matches = context.resources.filter(
+        (entry) =>
+          entry.kind === kind &&
+          (entry.resourceId === name ||
+            path.basename(entry.directory) === name ||
+            path.join(context.workbench, entry.directory) === alias),
+      );
+      if (matches.length !== 1 || !matches[0].source)
+        throw new Error(`Select exactly one registered ${kind} with qx-workspace resources; no match for ${name}`);
+      const selected = matches[0];
+      let source = selected.source!;
+      if (flags.includes("--write")) {
+        const retained = spawnSync("quixos-qx", ["converge", context.workbench, selected.directory], {
+          encoding: "utf8",
+          env: { ...process.env, QUIXOS_JJ_NO_CHECKPOINT: "1" },
+        });
+        if (retained.error || retained.status !== 0)
+          throw new Error(
+            `Dependency source needs attention: ${retained.error?.message ?? retained.stdout ?? retained.stderr}`,
+          );
+        source = JSON.parse(retained.stdout).candidate;
+      }
+      repository = source.repository;
+      commit = source.commit;
+    }
+    if (
+      !root ||
+      !["interface", "package"].includes(kind) ||
+      !/^[A-Za-z_][A-Za-z0-9_]*$/.test(name ?? "") ||
+      !repository ||
+      !commit ||
+      flags.some((flag) => flag !== "--write")
+    )
+      throw new Error("usage: quixos-qx scaffold-dependency ROOT interface|package NAME REPOSITORY COMMIT [--write]");
+    const resourceKind = kind as "package" | "interface";
+    let entrypoint: "workspace" | "package" | "interface" | undefined;
+    for (const candidate of ["workspace", "package", "interface"] as const) {
+      try {
+        await readFile(path.join(root, `${candidate}.qx`));
+        if (entrypoint) throw new Error("Ambiguous repository entrypoint");
+        entrypoint = candidate;
+      } catch (error) {
+        if ((error as NodeJS.ErrnoException).code !== "ENOENT") throw error;
+      }
+    }
+    if (!entrypoint) throw new Error("No QX repository entrypoint");
+    const lock = await loadQuixosLock(path.join(root, "quixos.lock"));
+    if (!lock.ok) throw new Error("Invalid resource lock");
+    let target = "quixos.lock";
+    for (const file of lock.lock.sourceFiles ?? ["quixos.lock"]) {
+      const parsed = parseQuixosLockDocument(await readFile(path.join(root, file), "utf8"));
+      if (parsed.ok && parsed.document.resources.some((entry) => entry.kind === kind && entry.binding === name))
+        target = file;
+    }
+    const request: StructuralRequest = {
+      kind: entrypoint,
+      source: await authorSource(root),
+      validation: "syntax",
+      files: [
+        { file: `${entrypoint}.qx`, edits: [{ operation: "import", kind: resourceKind, name }] },
+        {
+          file: target,
+          edits: [{ operation: "dependency", kind: resourceKind, name, source: { repository, commit } }],
+        },
+      ],
+    };
+    const plan = await planStructure(root, request, process.env.QUIXOS_SNAPSHOT_MAP);
+    process.stdout.write(
+      `${JSON.stringify({ ...planSummary(plan), applied: flags.includes("--write") ? await applyStructure(plan) : undefined }, null, 2)}\n`,
+    );
+    return;
+  }
+  if (command === "scaffold-interface") {
+    const [root, specFile, ...flags] = args;
+    if (!root || !specFile || flags.some((flag) => flag !== "--write"))
+      throw new Error("usage: quixos-qx scaffold-interface ROOT SPEC_JSON [--write]");
+    const spec = (await readSpec(specFile)) as ScaffoldRecipe;
+    if (!spec.name || !/^[A-Za-z_][A-Za-z0-9_]*$/.test(spec.name) || !spec.id || !spec.revision || !spec.tools?.quixos)
+      throw new Error("Interface scaffold requires name, id, revision and Quixos toolchain source");
+    const request: StructuralRequest = {
+      kind: "interface",
+      // Like package scaffolding, declaration creation is provisional. Imports
+      // can be attached next; the normal check verifies the complete graph.
+      validation: "syntax",
+      source: spec.source,
+      files: [
+        {
+          file: "interface.qx",
+          create:
+            spec.declaration ??
+            `interface ${spec.name} id ${JSON.stringify(spec.id)} revision ${JSON.stringify(spec.revision)} {\n}\n`,
+        },
+        {
+          file: "quixos.lock",
+          create: formatQuixosLock({
+            formatVersion: 1,
+            quixos: { resolver: "git", ...spec.tools.quixos },
+            resources: [],
+          }),
+        },
+        { file: ".gitignore", create: ".quixos/\n" },
+      ],
+    };
+    const plan = await planStructure(root, request, process.env.QUIXOS_SNAPSHOT_MAP);
+    process.stdout.write(
+      `${JSON.stringify({ ...planSummary(plan), applied: flags.includes("--write") ? await applyStructure(plan) : undefined }, null, 2)}\n`,
+    );
+    return;
+  }
+  if (command === "build-package") {
+    if (args.length !== 3)
+      throw new Error("usage: quixos-qx build-package COMMITTED_SOURCE SCHEMA PACKAGE_REVISION_ID");
+    process.stdout.write(`${await buildCheckedPackage(args[0], args[1], args[2])}\n`);
+    return;
+  }
+  if (command === "source-digest") {
+    if (!args[0] || args.length !== 1) throw new Error("usage: quixos-qx source-digest ROOT");
+    const temporary = await mkdtemp(path.join(os.tmpdir(), "qx-source-digest-"));
+    try {
+      process.stdout.write(`${(await snapshotRepository(args[0], temporary)).treeDigest}\n`);
+    } finally {
+      await rm(temporary, { recursive: true, force: true });
+    }
+    return;
+  }
+  if (command === "pin-upgrade") {
+    const [workbench, specFile, ...flags] = args;
+    if (!workbench || !specFile)
+      throw new Error("usage: quixos-qx pin-upgrade WORKBENCH SPEC_JSON [--publish] [--resume UUID]");
+    let publish = false,
+      acceptEdits = false,
+      resume: string | undefined;
+    for (let index = 0; index < flags.length; index++) {
+      if (flags[index] === "--publish") publish = true;
+      else if (flags[index] === "--accept-edits") acceptEdits = true;
+      else if (flags[index] === "--resume" && /^[a-f0-9-]{36}$/.test(flags[index + 1] ?? "")) resume = flags[++index];
+      else throw new Error(`Unknown pin-upgrade option ${flags[index]}`);
+    }
+    if (acceptEdits && !resume) throw new Error("--accept-edits requires an existing refactor journal (--resume)");
+    const plan = resume
+      ? JSON.parse(await readFile(path.join(workbench, ".quixos/upgrades", `${resume}.json`), "utf8")).plan
+      : await planPinUpgrades(
+          workbench,
+          specFile === "auto"
+            ? await discoverUpgradeSpec(workbench)
+            : (JSON.parse(await readFile(specFile, "utf8")) as UpgradeSpec),
+        );
+    if (resume && path.resolve(workbench) !== plan.workbench)
+      throw new Error("Upgrade journal belongs to another workbench");
+    process.stdout.write(
+      `${JSON.stringify(publish ? await applyPinUpgrades(plan, resume, undefined, { acceptEdits }) : plan, null, 2)}\n`,
+    );
+    return;
+  }
+  if (command === "scaffold-refresh")
+    throw new Error(
+      "Refresh is no longer required: edit declarations and typed implementation wiring, then run qx-workspace check. Dependency installation uses scaffold install.",
+    );
+  if (["scaffold-package", "scaffold-function", "scaffold-migration", "scaffold-install"].includes(command)) {
+    const [root, specFile, ...flags] = args;
+    let spec: ScaffoldRecipe;
+    if (command === "scaffold-function" && /^[A-Za-z_][A-Za-z0-9_]*$/.test(specFile ?? "")) {
+      const authored = parseQx(await readFile(path.join(root, "package.qx"), "utf8"));
+      const declarationNode = [...walkSyntax(authored.root)].find((node) => node.kind === "packageResourceDecl");
+      const nameNode = declarationNode?.children.find((node) => node.kind === "identifier");
+      if (!nameNode) throw new Error("Expected a package declaration");
+      const name = authored.source.slice(nameNode.start, nameNode.end);
+      spec = { source: await authorSource(root), name: specFile, id: `export:${name}:${specFile}` };
+      const declaration = flags.indexOf("--declaration");
+      if (declaration >= 0) {
+        if (!flags[declaration + 1]) throw new Error("--declaration requires a QX declaration file");
+        spec.declaration = await readFile(flags[declaration + 1], "utf8");
+        const parsed = parseQx(`package Draft id "package:draft" revision "package:draft@1" { ${spec.declaration} }`);
+        if (parsed.diagnostics.length) throw new Error(parsed.diagnostics.map((d) => d.message).join("\n"));
+        const exported = [...walkSyntax(parsed.root)].filter((node) =>
+          ["packageOperationExport", "packageFunctionExport", "packageConstructorExport"].includes(node.kind),
+        );
+        if (exported.length !== 1)
+          throw new Error("--declaration must contain exactly one function, operation or constructor export");
+        const literal = exported[0].children.find((node) => node.kind === "stringLiteral");
+        if (!literal) throw new Error("Declaration requires an authored export ID");
+        spec.id = JSON.parse(parsed.source.slice(literal.start, literal.end));
+        flags.splice(declaration, 2);
+      }
+    } else spec = (await readSpec(specFile)) as ScaffoldRecipe;
+    if (
+      !root ||
+      !specFile ||
+      flags.some((flag) => !["--write", "--install"].includes(flag)) ||
+      (flags.includes("--install") && !flags.includes("--write"))
+    )
+      throw new Error(
+        "usage: quixos-qx scaffold-package|function|migration|refresh ROOT SPEC_JSON [--write [--install]]",
+      );
+    const plan =
+      command === "scaffold-install"
+        ? undefined
+        : await planStructure(
+            root,
+            await scaffoldRecipe(root, command.slice(9) as "package" | "function" | "migration", spec),
+            process.env.QUIXOS_SNAPSHOT_MAP,
+          );
+    const applied = plan && flags.includes("--write") ? await applyStructure(plan) : undefined;
+    if (flags.includes("--install")) {
+      const cwd = path.resolve(root, spec.directory ?? "");
+      const toolchain = JSON.parse(await readFile(path.join(cwd, "quixos.toolchain.json"), "utf8"));
+      if (toolchain.generatedBy !== "qx-scaffold-v1" || typeof toolchain.nixifyPluginUrl !== "string")
+        throw new Error("Missing scaffold toolchain");
+      for (const [executable, args] of [
+        ["corepack", ["yarn", "plugin", "import", toolchain.nixifyPluginUrl]],
+        ["corepack", ["yarn", "config", "set", "generateDefaultNix", "false"]],
+        ["corepack", ["yarn", "config", "set", "individualNixPackaging", "true"]],
+        ["corepack", ["yarn", "install"]],
+      ] as const) {
+        const result = spawnSync(executable, [...args], { cwd, stdio: ["inherit", 2, 2] });
+        if (result.error || result.status !== 0)
+          throw new Error(
+            `Scaffold files retained; ${executable} ${args.join(" ")} failed: ${result.error?.message ?? result.status}`,
+          );
+      }
+      try {
+        await readFile(path.join(cwd, "yarn-project.nix"));
+      } catch {
+        throw new Error(
+          "Nixify did not generate yarn-project.nix. It skips repositories under the OS temporary directory; use an ordinary workspace checkout and retry installation.",
+        );
+      }
+      await snapshotCommit(cwd);
+      const locked = spawnSync("nix", ["flake", "lock"], { cwd, stdio: ["inherit", 2, 2] });
+      if (locked.error || locked.status !== 0) throw new Error("Scaffold files retained; nix flake lock failed");
+    }
+    process.stdout.write(
+      `${JSON.stringify({ ...(plan ? planSummary(plan) : { installed: true }), applied }, null, 2)}\n`,
+    );
+    return;
+  }
+  if (command === "scaffold-structure") {
+    const [root, spec, ...flags] = args;
+    if (!root || !spec || flags.some((flag) => flag !== "--write"))
+      throw new Error("usage: quixos-qx scaffold-structure ROOT SPEC_JSON [--write]");
+    const request = (await readSpec(spec)) as StructuralRequest;
+    if (request.kind !== "workspace" && !request.source) request.source = await authorSource(root);
+    const plan = await planStructure(root, request, process.env.QUIXOS_SNAPSHOT_MAP);
+    const applied = flags.includes("--write") ? await applyStructure(plan) : undefined;
+    process.stdout.write(`${JSON.stringify({ ...planSummary(plan), applied }, null, 2)}\n`);
+    return;
+  }
+  if (command === "scaffold-resume") {
+    const [root, id, ...extra] = args;
+    if (!root || !id || extra.length) throw new Error("usage: quixos-qx scaffold-resume ROOT JOURNAL_ID");
+    process.stdout.write(`${JSON.stringify(await resumeStructure(root, id), null, 2)}\n`);
+    return;
+  }
+  if (["check", "check-resource"].includes(command))
+    throw new Error(
+      "Use qx-workspace check in the registered repository; handwritten source/snapshot-map candidates are no longer an authoring check path",
+    );
+  if (command === "evolution") {
+    const [baseline, candidate, reviews, ...extra] = args;
+    if (!baseline || !candidate || extra.length)
+      throw new Error("usage: quixos-qx evolution BASELINE_JSON CANDIDATE_JSON [REVIEWS_JSON]");
+    const before = baseline === "none" ? null : JSON.parse(await readFile(baseline, "utf8"));
+    const after = JSON.parse(await readFile(candidate, "utf8"));
+    const decisions = reviews ? JSON.parse(await readFile(reviews, "utf8")) : [];
+    if (!Array.isArray(decisions)) throw new Error("Reviews must be an array");
+    process.stdout.write(`${JSON.stringify(planEvolution(before, after, { reviews: decisions }), null, 2)}\n`);
+    return;
+  }
+  if (command === "scaffold-atom") {
+    const [root, name, id, ...flags] = args;
+    if (!root || !name || !id || flags.some((flag) => flag !== "--write"))
+      throw new Error("usage: quixos-qx scaffold-atom ROOT NAME ID [--write]");
+    const resolveResource = await createGitCapabilityResolver({ checkoutRoot: `${root}/.quixos/resource-checkouts` });
+    const plan = await scaffoldAtom({ root, name, id, write: flags.includes("--write"), resolveResource });
+    process.stdout.write(`${JSON.stringify(plan, null, 2)}\n`);
+    return;
+  }
+  const [file, flag, ...rest] = args;
+  if (
+    !file ||
+    rest.length ||
+    (flag && flag !== "--write") ||
+    !["parse", "lint", "format"].includes(command ?? "") ||
+    (flag && command !== "format")
+  )
+    throw new Error("usage: quixos-qx parse|lint|format FILE [--write (format only)]");
+  const source = await readFile(file, "utf8");
+  if (command === "format") {
+    const formatted = formatQx(source);
+    if (flag) await writeFile(file, formatted);
+    else process.stdout.write(formatted);
+  } else {
+    const result = command === "parse" ? parseQx(source, file) : lintQx(source, file);
+    process.stdout.write(`${JSON.stringify(result, null, 2)}\n`);
+    if (Array.isArray(result) ? result.some((entry) => entry.severity === "error") : result.diagnostics.length)
+      process.exitCode = 1;
+  }
+};
+main().catch((error: unknown) => {
+  console.error(error instanceof Error ? error.message : error);
+  process.exitCode = 1;
+});

src/capability-language/workspace-cli.ts

@@ -1,13 +1,21 @@
 #!/usr/bin/env node
 
-import { writeFile } from "node:fs/promises";
+import { readFile, writeFile } from "node:fs/promises";
 import process from "node:process";
 import { compileWorkspaceRepository } from "./assembly.js";
 import { createGitCapabilityResolver } from "./git-resolver.js";
+import { bindingSchema, specializeBindingSchema } from "../bindings/index.js";
+import {
+  planEvolution,
+  runtimeContracts,
+  type EvolutionReview,
+  type WorkspaceRevision,
+} from "../capability-model/index.js";
 
 const usage = `usage: quixos-workspace-compile --root DIRECTORY --checkout-root DIRECTORY
        [--snapshot-map PATH] [--graph-out PATH] [--workspace-id ID] [--workspace-revision-id ID]
-       [--source-root-commit GIT_REV]
+       [--source-root-commit GIT_REV] [--baseline PLAN_JSON] [--evolution-out PATH]
+       [--reviews REVIEW_JSON] [--schemas-out PATH]
 
 Resolves a workspace's recursive resource-lock graph, clones every exact
 resource revision, validates standalone interface/package manifests, and emits
@@ -28,10 +36,14 @@ const parseArgs = (args: string[]) => {
     rootDirectory,
     checkoutRoot,
     graphOut: values.get("--graph-out"),
+    schemasOut: values.get("--schemas-out"),
     snapshotMap: values.get("--snapshot-map"),
     workspaceId: values.get("--workspace-id"),
     workspaceRevisionId: values.get("--workspace-revision-id"),
     sourceRootCommit: values.get("--source-root-commit"),
+    baseline: values.get("--baseline"),
+    evolutionOut: values.get("--evolution-out"),
+    reviews: values.get("--reviews"),
   };
 };
 
@@ -54,33 +66,71 @@ const main = async () => {
   });
 
   if (options.graphOut) {
-    await writeFile(options.graphOut, `${JSON.stringify({
+    await writeFile(
-      formatVersion: 1,
+      options.graphOut,
-      quixos: assembled.lock.quixos,
+      `${JSON.stringify(
-      directResources: [...assembled.directResources.entries()].map(([bindingKey, node]) => {
+        {
-        const [kind, binding] = bindingKey.split("\0");
+          formatVersion: 1,
-        return { kind, binding, resourceKey: node.key, directory: node.directory };
+          quixos: assembled.lock.quixos,
-      }),
+          directResources: [...assembled.directResources.entries()].map(([bindingKey, node]) => {
-      resources: assembled.resources.map((node) => ({
+            const [kind, binding] = bindingKey.split("\0");
-        key: node.key,
+            return { kind, binding, resourceKey: node.key, directory: node.directory };
-        kind: node.kind,
+          }),
-        source: node.source,
+          resources: assembled.resources.map((node) => ({
-        directory: node.directory,
+            key: node.key,
-        resourceId: node.resource.kind === "interface"
+            kind: node.kind,
-          ? node.resource.revision.interfaceId
+            source: node.source,
-          : node.resource.revision.packageId,
+            directory: node.directory,
-        revisionId: node.resource.revision.revisionId,
+            resourceId:
-        dependencies: [...node.dependencies.entries()].map(([binding, dependency]) => ({
+              node.resource.kind === "interface"
-          binding,
+                ? node.resource.revision.interfaceId
-          resourceKey: dependency.key,
+                : node.resource.revision.packageId,
-        })),
+            revisionId: node.resource.revision.revisionId,
-      })),
+            dependencies: [...node.dependencies.entries()].map(([binding, dependency]) => ({
-    }, null, 2)}\n`);
+              binding,
+              resourceKey: dependency.key,
+            })),
+          })),
+        },
+        null,
+        2,
+      )}\n`,
+    );
   }
-  process.stdout.write(`${JSON.stringify(assembled.workspace, null, 2)}\n`);
+  const candidate = { ...assembled.workspace, executionContracts: runtimeContracts(assembled.workspace) };
+  if (options.schemasOut) {
+    const schemas: Record<string, unknown> = {};
+    for (const node of assembled.resources.filter((entry) => entry.kind === "package")) {
+      const closure = new Map<string, typeof node>();
+      const visit = (entry: typeof node) => {
+        if (closure.has(entry.key)) return;
+        closure.set(entry.key, entry);
+        entry.dependencies.forEach(visit);
+      };
+      visit(node);
+      schemas[node.resource.revision.revisionId] = specializeBindingSchema(
+        bindingSchema({ resources: [...closure.values()] }),
+        candidate,
+        node.resource.revision.revisionId,
+      );
+    }
+    await writeFile(options.schemasOut, JSON.stringify(schemas));
+  }
+  if (options.evolutionOut) {
+    const baseline = options.baseline
+      ? (JSON.parse(await readFile(options.baseline, "utf8")) as WorkspaceRevision)
+      : null;
+    const reviews = options.reviews ? (JSON.parse(await readFile(options.reviews, "utf8")) as EvolutionReview[]) : [];
+    if (!Array.isArray(reviews)) throw new Error("Review file must contain an array");
+    await writeFile(
+      options.evolutionOut,
+      `${JSON.stringify(planEvolution(baseline, candidate, { reviews }), null, 2)}\n`,
+    );
+  }
+  process.stdout.write(`${JSON.stringify(candidate, null, 2)}\n`);
 };
 
 main().catch((error: unknown) => {
-  process.stderr.write(`${error instanceof Error ? error.stack ?? error.message : String(error)}\n`);
+  process.stderr.write(`${error instanceof Error ? (error.stack ?? error.message) : String(error)}\n`);
   process.exitCode = 1;
 });

src/capability-model/evolution.ts

@@ -0,0 +1,399 @@
+import { createHash } from "node:crypto";
+import type { Binding, Conformance, DependencyBinding, PersistentAttachment, WorkspaceRevision } from "./types.js";
+import { validateWorkspaceRevision } from "./validation.js";
+
+/** Content hashing is independent of JSON object insertion order, not array order. */
+const compareText = (a: string, b: string) => (a < b ? -1 : a > b ? 1 : 0);
+export const canonicalJson = (value: unknown): string => {
+  if (value === null || typeof value === "string" || typeof value === "boolean") return JSON.stringify(value);
+  if (typeof value === "number" && Number.isFinite(value)) return JSON.stringify(value);
+  if (Array.isArray(value)) return `[${value.map(canonicalJson).join(",")}]`;
+  if (typeof value === "object" && value !== null) {
+    if (Object.getPrototypeOf(value) !== Object.prototype && Object.getPrototypeOf(value) !== null)
+      throw new Error("Expected a plain JSON object");
+    return `{${Object.entries(value)
+      .filter(([, entry]) => entry !== undefined)
+      .sort(([a], [b]) => compareText(a, b))
+      .map(([key, entry]) => `${JSON.stringify(key)}:${canonicalJson(entry)}`)
+      .join(",")}}`;
+  }
+  throw new Error(`Cannot hash non-JSON value: ${typeof value}`);
+};
+export const contentDigest = (value: unknown) =>
+  `sha256:${createHash("sha256").update(canonicalJson(value)).digest("hex")}`;
+const semantic = (value: unknown): unknown => {
+  if (Array.isArray(value)) return value.map(semantic);
+  if (value && typeof value === "object")
+    return Object.fromEntries(
+      Object.entries(value)
+        .filter(([key, entry]) => entry !== undefined && key !== "displayName" && key !== "documentation")
+        // These are authored data/maps, not schema nodes. A user field literally
+        // named displayName or documentation is semantic and must stay in the hash.
+        .map(([key, entry]) => [key, key === "defaultValue" || key === "fields" ? entry : semantic(entry)]),
+    );
+  return value;
+};
+const sorted = <T>(entries: readonly T[], key: (entry: T) => string) =>
+  [...entries].sort((a, b) => compareText(key(a), key(b)));
+export const conformanceIdentity = (entry: Conformance): string =>
+  entry.id ?? `legacy:${entry.atomId}:${entry.interfaceRevisionId}`;
+
+export type StorageContract = {
+  id: string;
+  ownerId: string;
+  kind: "state" | "edge";
+  digest: string;
+  definition: unknown;
+};
+/** Automatic evolution preserves values; it never interprets migration code or
+ * guesses that a new nominal message descriptor means the same representation. */
+export const storageChangeRequiresMigration = (
+  previous: StorageContract | undefined,
+  next: StorageContract | undefined,
+  oldAtomIds: ReadonlySet<string>,
+): boolean => {
+  if (!next) return true;
+  const after = next.definition as PersistentAttachment;
+  if (!previous) {
+    if (after.kind === "state")
+      return (
+        oldAtomIds.has(after.attachedTo) && after.defaultValue === undefined && after.valueType.kind !== "optional"
+      );
+    return after.endpoints.some(
+      (endpoint) =>
+        endpoint.cardinality === "exactly-one" &&
+        (endpoint.constraint.kind !== "atom" || oldAtomIds.has(endpoint.constraint.atomId)),
+    );
+  }
+  if (previous.ownerId !== next.ownerId || previous.kind !== next.kind) return true;
+  const before = previous.definition as PersistentAttachment;
+  if (before.kind === "state" && after.kind === "state") {
+    // Capture materializes old defaults, so changing a default affects only
+    // newly constructed objects, not existing sparse state.
+    const { defaultValue: _beforeDefault, ...beforeStorage } = before;
+    const { defaultValue: _afterDefault, ...afterStorage } = after;
+    return canonicalJson(beforeStorage) !== canonicalJson(afterStorage);
+  }
+  return canonicalJson(before) !== canonicalJson(after);
+};
+export const storageContracts = (workspace: WorkspaceRevision): StorageContract[] => {
+  const result: StorageContract[] = [];
+  const add = (attachment: PersistentAttachment, ownerId: string) => {
+    const definition = semantic(attachment);
+    result.push({
+      id: attachment.id,
+      ownerId,
+      kind: attachment.kind,
+      definition,
+      digest: contentDigest({ ownerId, definition }),
+    });
+  };
+  for (const attachment of workspace.sharedAttachments) add(attachment, "legacy:workspace");
+  for (const conformance of workspace.conformances)
+    for (const attachment of conformance.privateAttachments) add(attachment, conformanceIdentity(conformance));
+  return sorted(result, (entry) => entry.id);
+};
+
+type GraphNode = { value: unknown; dependencies: Set<string>; reviewProviders: Set<string> };
+export type RuntimeContract = {
+  groupId: string;
+  packageId: string;
+  packageRevisionId: string;
+  digest: string;
+  reviewProviders: string[];
+  dependencies: Array<{ id: string; digest: string }>;
+};
+
+/** Build only outbound execution dependencies. Incoming callers never retain or invalidate a provider. */
+export const runtimeContracts = (workspace: WorkspaceRevision): RuntimeContract[] => {
+  const nodes = new Map<string, GraphNode>();
+  const node = (key: string, value: unknown) => {
+    const result = { value: semantic(value), dependencies: new Set<string>(), reviewProviders: new Set<string>() };
+    nodes.set(key, result);
+    return result;
+  };
+  const conformanceKey = (atom: string, iface: string) => `conformance:${atom}:${iface}`;
+  for (const storage of storageContracts(workspace)) node(`attachment:${storage.id}`, storage);
+  for (const iface of workspace.interfaceImports)
+    node(`interface:${iface.revisionId}`, {
+      ...iface,
+      members: sorted(iface.members, (entry) => entry.id).map((entry) => ({
+        ...entry,
+        operations: sorted(entry.operations, (operation) => operation.id),
+      })),
+    });
+  for (const pkg of workspace.packageImports)
+    node(`package:${pkg.revisionId}`, {
+      ...pkg,
+      semanticMajor: pkg.semanticMajor ?? 1,
+      exports: sorted(pkg.exports, (entry) => entry.id).map((entry) => ({
+        ...entry,
+        dependencyPorts: sorted(entry.dependencyPorts, (port) => port.id),
+      })),
+    });
+  const dependency = (parent: GraphNode, binding: DependencyBinding, atomId: string, reviews?: Set<string>) => {
+    if (binding.kind === "state") parent.dependencies.add(`attachment:${binding.slotId}`);
+    if (binding.kind === "edge") parent.dependencies.add(`attachment:${binding.edgeTypeId}`);
+    if (binding.kind === "constructor") {
+      parent.dependencies.add(`constructor:${binding.atomId}`);
+      const ctor = workspace.constructors.find((entry) => entry.atomId === binding.atomId);
+      const pkg = workspace.packageImports.find((entry) => entry.revisionId === ctor?.packageRevisionId);
+      if (pkg) reviews?.add(pkg.packageId);
+    }
+    if (binding.kind !== "constructor" && binding.via) parent.dependencies.add(`attachment:${binding.via.edgeTypeId}`);
+    if (binding.kind === "interface") {
+      parent.dependencies.add(`interface:${binding.interfaceRevisionId}`);
+      // An edge traversal may select any matching target. Conservatively include every possible witness.
+      for (const conformance of workspace.conformances) {
+        if (
+          conformance.interfaceRevisionId === binding.interfaceRevisionId &&
+          (binding.via || conformance.atomId === atomId)
+        ) {
+          parent.dependencies.add(conformanceKey(conformance.atomId, conformance.interfaceRevisionId));
+          reviews?.add(conformanceIdentity(conformance));
+          for (const operation of conformance.operationBindings) {
+            if (operation.binding.kind !== "package") continue;
+            const revisionId = operation.binding.packageRevisionId;
+            const pkg = workspace.packageImports.find((entry) => entry.revisionId === revisionId);
+            if (pkg) reviews?.add(pkg.packageId);
+          }
+        }
+      }
+    }
+  };
+  const binding = (parent: GraphNode, value: Binding, atomId: string, context: unknown) => {
+    if (value.kind !== "package") {
+      dependency(parent, value, atomId);
+      return;
+    }
+    const packageNode = nodes.get(`package:${value.packageRevisionId}`)!;
+    parent.dependencies.add(`package:${value.packageRevisionId}`);
+    const normalized = { ...value, dependencies: sorted(value.dependencies, (entry) => entry.portId) };
+    const key = `binding:${contentDigest({ atomId, context, value: semantic(normalized) })}`;
+    const bound = node(key, { atomId, context, binding: normalized });
+    packageNode.dependencies.add(key);
+    for (const port of value.dependencies) dependency(bound, port.binding, atomId, packageNode.reviewProviders);
+  };
+  for (const conformance of workspace.conformances) {
+    const parent = node(conformanceKey(conformance.atomId, conformance.interfaceRevisionId), {
+      id: conformanceIdentity(conformance),
+      semanticMajor: conformance.semanticMajor ?? 1,
+      atomId: conformance.atomId,
+      interfaceRevisionId: conformance.interfaceRevisionId,
+      operations: sorted(conformance.operationBindings, (entry) => entry.operationId),
+      materializations: sorted(conformance.relationshipMaterializations, (entry) => entry.memberId),
+    });
+    parent.dependencies.add(`interface:${conformance.interfaceRevisionId}`);
+    const contract = workspace.interfaceImports.find((entry) => entry.revisionId === conformance.interfaceRevisionId);
+    for (const required of contract?.requiredInterfaces ?? [])
+      parent.dependencies.add(conformanceKey(conformance.atomId, required));
+    for (const attachment of conformance.privateAttachments) parent.dependencies.add(`attachment:${attachment.id}`);
+    for (const operation of conformance.operationBindings)
+      binding(parent, operation.binding, conformance.atomId, {
+        conformanceId: conformanceIdentity(conformance),
+        semanticMajor: conformance.semanticMajor ?? 1,
+        operationId: operation.operationId,
+      });
+    for (const materialization of conformance.relationshipMaterializations) {
+      parent.dependencies.add(`constructor:${materialization.constructorAtomId}`);
+      parent.dependencies.add(`attachment:${materialization.edgeTypeId}`);
+    }
+  }
+  for (const constructor of workspace.constructors) {
+    const parent = node(`constructor:${constructor.atomId}`, constructor);
+    binding(parent, { kind: "package", ...constructor }, constructor.atomId, { constructor: constructor.atomId });
+  }
+  const counts = new Map<string, number>();
+  for (const pkg of workspace.packageImports) counts.set(pkg.packageId, (counts.get(pkg.packageId) ?? 0) + 1);
+  return sorted(
+    workspace.packageImports.map((pkg): RuntimeContract => {
+      const visited = new Set<string>();
+      const walk = (key: string) => {
+        if (visited.has(key)) return;
+        const entry = nodes.get(key);
+        if (!entry) throw new Error(`Unresolved execution dependency ${key}`);
+        visited.add(key);
+        for (const target of entry.dependencies) walk(target);
+      };
+      walk(`package:${pkg.revisionId}`);
+      const dependencies = [...visited].sort().map((id) => ({ id, digest: contentDigest(nodes.get(id)!.value) }));
+      return {
+        groupId: counts.get(pkg.packageId) === 1 ? pkg.packageId : `${pkg.packageId}#${pkg.revisionId}`,
+        packageId: pkg.packageId,
+        packageRevisionId: pkg.revisionId,
+        digest: contentDigest(dependencies),
+        reviewProviders: [...nodes.get(`package:${pkg.revisionId}`)!.reviewProviders].sort(),
+        dependencies,
+      };
+    }),
+    (entry) => entry.groupId,
+  );
+};
+
+export type EvolutionReview = {
+  requirementDigest: string;
+  decision: "changed" | "accepted-unchanged";
+  rationale: string;
+  agentId: string;
+};
+export type ReviewRequirement = {
+  consumerId: string;
+  providerId: string;
+  oldMajor: number;
+  newMajor: number;
+  requirementDigest: string;
+};
+export type RuntimeAction = {
+  groupId: string;
+  action: "keep" | "start" | "replace" | "retire";
+  previous?: RuntimeContract;
+  candidate?: RuntimeContract;
+  reasons: string[];
+};
+export type EvolutionReport = {
+  schemaVersion: 1;
+  baselineDigest: string | null;
+  candidateDigest: string;
+  checkerVersion: string;
+  runtimeActions: RuntimeAction[];
+  storageChanges: Array<{
+    id: string;
+    kind: "add" | "remove" | "change";
+    requiresMigration: boolean;
+    previous?: StorageContract;
+    candidate?: StorageContract;
+  }>;
+  migrationRequired: string[];
+  reviews: Array<ReviewRequirement & { accepted: boolean }>;
+  packageChecks: Array<{ groupId: string; contractDigest: string }>;
+  blockers: string[];
+};
+
+export const planEvolution = (
+  baseline: WorkspaceRevision | null,
+  candidate: WorkspaceRevision,
+  options: { reviews?: EvolutionReview[]; allowLegacy?: boolean } = {},
+): EvolutionReport => {
+  const issues = validateWorkspaceRevision(candidate);
+  if (issues.length)
+    throw new Error(
+      `Invalid candidate workspace:\n${issues.map((entry) => `${entry.path}: ${entry.message}`).join("\n")}`,
+    );
+  if (baseline && baseline.workspaceId !== candidate.workspaceId)
+    throw new Error("Cannot evolve a different workspace");
+  const candidateDigest = contentDigest(candidate);
+  const checkerVersion = "quixos-evolution-v1";
+  const blockers: string[] = [];
+  if (!options.allowLegacy) {
+    if (candidate.sharedAttachments.length)
+      blockers.push("Assign legacy workspace-shared attachments to explicit conformance owners");
+    for (const entry of candidate.conformances)
+      if (!entry.id)
+        blockers.push(`Conformance ${entry.atomId} as ${entry.interfaceRevisionId} requires an authored ID`);
+  }
+  const previousRuntimes = new Map((baseline ? runtimeContracts(baseline) : []).map((entry) => [entry.groupId, entry]));
+  const nextRuntimes = new Map(runtimeContracts(candidate).map((entry) => [entry.groupId, entry]));
+  const runtimeActions: RuntimeAction[] = [...new Set([...previousRuntimes.keys(), ...nextRuntimes.keys()])]
+    .sort()
+    .map((groupId) => {
+      const previous = previousRuntimes.get(groupId),
+        next = nextRuntimes.get(groupId);
+      const before = new Map(previous?.dependencies.map((entry) => [entry.id, entry.digest]));
+      const after = new Map(next?.dependencies.map((entry) => [entry.id, entry.digest]));
+      const reasons = [...new Set([...before.keys(), ...after.keys()])]
+        .sort()
+        .filter((id) => before.get(id) !== after.get(id));
+      return {
+        groupId,
+        action: !previous ? "start" : !next ? "retire" : previous.digest === next.digest ? "keep" : "replace",
+        ...(previous ? { previous } : {}),
+        ...(next ? { candidate: next } : {}),
+        reasons,
+      };
+    });
+  const beforeStorage = new Map((baseline ? storageContracts(baseline) : []).map((entry) => [entry.id, entry]));
+  const afterStorage = new Map(storageContracts(candidate).map((entry) => [entry.id, entry]));
+  const storageChanges: EvolutionReport["storageChanges"] = [];
+  for (const id of [...new Set([...beforeStorage.keys(), ...afterStorage.keys()])].sort()) {
+    const previous = beforeStorage.get(id),
+      next = afterStorage.get(id);
+    if (previous?.digest !== next?.digest)
+      storageChanges.push({
+        id,
+        kind: !previous ? "add" : !next ? "remove" : "change",
+        requiresMigration: storageChangeRequiresMigration(
+          previous,
+          next,
+          new Set(baseline?.atoms.map((atom) => atom.id) ?? []),
+        ),
+        ...(previous ? { previous } : {}),
+        ...(next ? { candidate: next } : {}),
+      });
+  }
+  const providers = (workspace: WorkspaceRevision) => [
+    ...workspace.packageImports.map((entry) => ({
+      id: entry.packageId as string,
+      revision: entry.revisionId as string,
+      major: entry.semanticMajor ?? 1,
+      node: `package:${entry.revisionId}`,
+      digest: contentDigest(entry),
+    })),
+    ...workspace.conformances.map((entry) => ({
+      id: conformanceIdentity(entry),
+      revision: contentDigest(entry),
+      major: entry.semanticMajor ?? 1,
+      node: `conformance:${entry.atomId}:${entry.interfaceRevisionId}`,
+      digest: contentDigest(entry),
+    })),
+  ];
+  const oldProviders = baseline ? providers(baseline) : [];
+  const reviews: EvolutionReport["reviews"] = [];
+  for (const provider of providers(candidate)) {
+    const old = oldProviders.filter((entry) => entry.id === provider.id);
+    if (old.length > 1) {
+      blockers.push(`Ambiguous semantic-major lineage for ${provider.id}`);
+      continue;
+    }
+    if (!old[0] || old[0].major === provider.major) continue;
+    if (provider.major < old[0].major) blockers.push(`Semantic major decreases for ${provider.id}`);
+    for (const consumer of nextRuntimes.values()) {
+      if (consumer.packageId === provider.id || !consumer.reviewProviders.includes(provider.id)) continue;
+      const requirement = {
+        consumerId: consumer.groupId,
+        providerId: provider.id,
+        oldMajor: old[0].major,
+        newMajor: provider.major,
+      };
+      const requirementDigest = contentDigest({
+        ...requirement,
+        oldProvider: old[0].digest,
+        newProvider: provider.digest,
+        consumer: consumer.digest,
+        checkerVersion,
+      });
+      const accepted = (options.reviews ?? []).some(
+        (entry) =>
+          entry.requirementDigest === requirementDigest &&
+          ["changed", "accepted-unchanged"].includes(entry.decision) &&
+          entry.rationale.trim() &&
+          entry.agentId.trim(),
+      );
+      reviews.push({ ...requirement, requirementDigest, accepted });
+      if (!accepted) blockers.push(`Semantic-major review required: ${consumer.groupId} consumes ${provider.id}`);
+    }
+  }
+  return {
+    schemaVersion: 1,
+    baselineDigest: baseline ? contentDigest(baseline) : null,
+    candidateDigest,
+    checkerVersion,
+    runtimeActions,
+    storageChanges,
+    migrationRequired: storageChanges.filter((entry) => entry.requiresMigration).map((entry) => entry.id),
+    reviews,
+    packageChecks: runtimeActions
+      .filter((entry) => entry.candidate && entry.action !== "keep")
+      .map((entry) => ({ groupId: entry.groupId, contractDigest: entry.candidate!.digest })),
+    blockers,
+  };
+};

src/capability-model/generic-packages.ts

@@ -0,0 +1,141 @@
+import { createHash } from "node:crypto";
+import {
+  capabilityId,
+  type PackageExport,
+  type PackageExportId,
+  type DependencyPort,
+  type PackageRevision,
+} from "./types.js";
+import {
+  TypeSubstitution,
+  GenericTypeError,
+  bindTypeParameters,
+  canonicalTypeArgument,
+  type TypeParameter,
+  type ValueTypeExpression,
+  type ObjectTypeExpression,
+  type InterfaceApplicationExpression,
+  type GenericTypeEnvironment,
+  type ClosedTypeArgument,
+  type ValueAliasDefinition,
+} from "./generics.js";
+
+export type GenericDependencyPort = Omit<DependencyPort, "requirement"> & {
+  requirement:
+    | {
+        kind: "state";
+        valueType: ValueTypeExpression;
+        primitives: Extract<DependencyPort["requirement"], { kind: "state" }>["primitives"];
+      }
+    | {
+        kind: "edge";
+        target: ObjectTypeExpression;
+        cardinality: Extract<DependencyPort["requirement"], { kind: "edge" }>["cardinality"];
+        primitives: Extract<DependencyPort["requirement"], { kind: "edge" }>["primitives"];
+      }
+    | { kind: "interface"; application: InterfaceApplicationExpression }
+    | { kind: "constructor"; target: ObjectTypeExpression; inputType: ValueTypeExpression };
+};
+
+export interface GenericPackageExport {
+  id: PackageExportId;
+  displayName: string;
+  parameters: TypeParameter[];
+  kind: "operation" | "function";
+  inputType: ValueTypeExpression;
+  outputType: ValueTypeExpression;
+  eventType?: ValueTypeExpression;
+  mode?: Extract<PackageExport, { kind: "operation" }>["mode"];
+  receiverRequirement:
+    | { kind: "any-object" }
+    | { kind: "target"; target: ObjectTypeExpression }
+    | { kind: "interfaces"; interfaces: InterfaceApplicationExpression[] };
+  dependencyPorts: GenericDependencyPort[];
+  aliases: ValueAliasDefinition[];
+}
+
+/** A closed manifest is a Nix build input, never a mutable source checkout. */
+export const specializePackageExport = (
+  pkg: PackageRevision,
+  definition: GenericPackageExport,
+  arguments_: ClosedTypeArgument[],
+  environment: GenericTypeEnvironment,
+): PackageExport => {
+  const lexical = { ...environment, aliases: new Map(definition.aliases.map((alias) => [alias.id, alias])) };
+  const bindings = bindTypeParameters(definition.parameters, arguments_, lexical, definition.displayName);
+  const substitution = new TypeSubstitution({ ...lexical, arguments: bindings });
+  const digest = createHash("sha256")
+    .update(
+      JSON.stringify([
+        "quixos-package-specialization-v1",
+        pkg.revisionId,
+        [pkg.source.repository, pkg.source.commit],
+        definition.id,
+        arguments_.map(canonicalTypeArgument),
+        environment.self ?? null,
+      ]),
+    )
+    .digest("hex");
+  const ports: DependencyPort[] = definition.dependencyPorts.map((port) => {
+    const requirement = port.requirement;
+    switch (requirement.kind) {
+      case "state":
+        return { ...port, requirement: { ...requirement, valueType: substitution.value(requirement.valueType) } };
+      case "edge":
+        return { ...port, requirement: { ...requirement, target: substitution.object(requirement.target) } };
+      case "interface":
+        return {
+          ...port,
+          requirement: { kind: "interface", interfaceRevisionId: substitution.application(requirement.application) },
+        };
+      case "constructor": {
+        const target = substitution.object(requirement.target);
+        if (target.kind !== "atom")
+          throw new GenericTypeError(
+            "constructor-target",
+            port.displayName,
+            "Constructor ports require a concrete atom argument, not an interface view",
+          );
+        return {
+          ...port,
+          requirement: {
+            kind: "constructor",
+            atomId: target.atomId,
+            inputType: substitution.value(requirement.inputType),
+          },
+        };
+      }
+    }
+  });
+  const common = {
+    id: capabilityId.packageExport(`export-application:sha256:${digest}`),
+    displayName: `${definition.displayName}$${digest}`,
+    inputType: substitution.value(definition.inputType),
+    outputType: substitution.value(definition.outputType),
+    dependencyPorts: ports,
+    application: {
+      exportId: definition.id,
+      arguments: structuredClone(arguments_),
+      ...(environment.self ? { self: environment.self } : {}),
+    },
+  };
+  if (definition.kind === "function") return { ...common, kind: "function" };
+  const receiver = definition.receiverRequirement;
+  const target = receiver.kind === "target" ? substitution.object(receiver.target) : undefined;
+  return {
+    ...common,
+    kind: "operation",
+    mode: definition.mode!,
+    ...(definition.eventType ? { eventType: substitution.value(definition.eventType) } : {}),
+    receiverRequirement: target
+      ? target.kind === "atom"
+        ? { kind: "exact-atom", atomId: target.atomId }
+        : { kind: "all-interfaces", interfaceRevisionIds: [target.interfaceRevisionId] }
+      : receiver.kind === "interfaces"
+        ? {
+            kind: "all-interfaces",
+            interfaceRevisionIds: receiver.interfaces.map((value) => substitution.application(value)),
+          }
+        : { kind: "any-object" },
+  };
+};

src/capability-model/generics.ts

@@ -0,0 +1,420 @@
+import { createHash } from "node:crypto";
+import {
+  capabilityId,
+  type AtomId,
+  type InterfaceMember,
+  type InterfaceOperation,
+  type InterfaceRevision,
+  type InterfaceRevisionId,
+  type ObjectExpectation,
+  type SourceRevision,
+  type ValueType,
+} from "./types.js";
+
+/** Authoring-only expressions. Installed ValueType deliberately has no variable case. */
+export type ValueTypeExpression =
+  | Extract<ValueType, { kind: "builtin" | "scalar" | "message" }>
+  | { kind: "parameter"; parameterId: string }
+  | { kind: "record"; fields: Record<string, ValueTypeExpression> }
+  | { kind: "list" | "optional"; value: ValueTypeExpression }
+  | { kind: "object-ref"; expectation: ObjectTypeExpression }
+  | { kind: "alias"; definitionId: string; arguments: TypeArgumentExpression[] };
+
+export type ObjectTypeExpression =
+  | { kind: "atom"; atomId: AtomId }
+  | { kind: "interface"; interfaceRevisionId: InterfaceRevisionId }
+  | { kind: "parameter"; parameterId: string }
+  | { kind: "self" }
+  | { kind: "application"; application: InterfaceApplicationExpression };
+
+export type TypeArgumentExpression =
+  | { kind: "value"; type: ValueTypeExpression }
+  | { kind: "object"; target: ObjectTypeExpression };
+
+export type ClosedTypeArgument = { kind: "value"; type: ValueType } | { kind: "object"; target: ObjectExpectation };
+
+export interface InterfaceApplicationExpression {
+  definitionId: InterfaceRevisionId;
+  arguments: TypeArgumentExpression[];
+}
+
+export type TypeParameter =
+  | { id: string; name: string; kind: "value"; storable?: boolean }
+  | { id: string; name: string; kind: "object"; implements: InterfaceApplicationExpression[] };
+
+export interface ValueAliasDefinition {
+  id: string;
+  parameters: TypeParameter[];
+  body: ValueTypeExpression;
+}
+
+export interface GenericInterfaceTemplate {
+  parameters: TypeParameter[];
+  members: InterfaceMember<ValueTypeExpression, ObjectTypeExpression>[];
+  requires: InterfaceApplicationExpression[];
+  usesSelf: boolean;
+  aliases?: ValueAliasDefinition[];
+}
+
+/** Instantiation produces the existing closed runtime IR, with explicit provenance. */
+export const instantiateInterface = (
+  definition: InterfaceRevision,
+  arguments_: readonly ClosedTypeArgument[],
+  environment: GenericTypeEnvironment,
+): InterfaceRevision => {
+  const template = definition.template;
+  if (!template) {
+    if (arguments_.length) fail("type-arity", definition.displayName, "Non-generic interface takes no type arguments");
+    return definition;
+  }
+  const lexicalEnvironment = {
+    ...environment,
+    aliases: new Map((template.aliases ?? []).map((alias) => [alias.id, alias])),
+  };
+  const argumentsMap = bindTypeParameters(template.parameters, arguments_, lexicalEnvironment, definition.displayName);
+  if (template.usesSelf && !environment.self)
+    fail("unbound-self", definition.displayName, "Self requires an implementing atom");
+  const substitution = new TypeSubstitution({ ...lexicalEnvironment, arguments: argumentsMap });
+  const operation = (entry: InterfaceOperation<ValueTypeExpression>): InterfaceOperation => ({
+    ...entry,
+    inputType: substitution.value(entry.inputType, `${definition.displayName}.${entry.displayName}.input`),
+    outputType: substitution.value(entry.outputType, `${definition.displayName}.${entry.displayName}.output`),
+    eventType: entry.eventType
+      ? substitution.value(entry.eventType, `${definition.displayName}.${entry.displayName}.event`)
+      : undefined,
+  });
+  const members: InterfaceMember[] = template.members.map((member) => {
+    const common = { id: member.id, displayName: member.displayName, operations: member.operations.map(operation) };
+    switch (member.kind) {
+      case "value":
+        return { ...common, kind: "value", valueType: substitution.value(member.valueType, member.displayName) };
+      case "relationship":
+        return {
+          ...common,
+          kind: "relationship",
+          target: substitution.object(member.target, member.displayName),
+          cardinality: member.cardinality,
+          ordered: member.ordered,
+        };
+      case "operation":
+        return {
+          ...common,
+          kind: "operation",
+          inputType: substitution.value(member.inputType, member.displayName),
+          outputType: substitution.value(member.outputType, member.displayName),
+        };
+    }
+  });
+  const application: AppliedInterfaceIdentity = {
+    definitionId: definition.revisionId,
+    source: definition.source,
+    arguments: structuredClone([...arguments_]),
+    ...(template.usesSelf ? { self: environment.self } : {}),
+  };
+  return {
+    interfaceId: definition.interfaceId,
+    revisionId: appliedInterfaceId(application),
+    displayName: definition.displayName,
+    source: definition.source,
+    members,
+    application,
+    requiredInterfaces: template.requires.map((required) => substitution.application(required)),
+  };
+};
+
+export interface GenericTypeEnvironment {
+  arguments: ReadonlyMap<string, ClosedTypeArgument>;
+  self?: AtomId;
+  aliases?: ReadonlyMap<string, ValueAliasDefinition>;
+  /** Resolves only checked declarations, never a caller-supplied runtime type string. */
+  applyInterface: (definitionId: InterfaceRevisionId, arguments_: readonly ClosedTypeArgument[]) => InterfaceRevisionId;
+  /** Proof in the candidate, not an authorization grant. */
+  implementsInterface: (target: ObjectExpectation, required: InterfaceRevisionId) => boolean;
+  /** External codecs must explicitly declare reference-free persistence support. */
+  storableMessage?: (descriptorId: string) => boolean;
+}
+
+export class GenericTypeError extends Error {
+  constructor(
+    readonly code: string,
+    readonly path: string,
+    message: string,
+  ) {
+    super(`${path}: ${message}`);
+    this.name = "GenericTypeError";
+  }
+}
+
+const fail = (code: string, path: string, message: string): never => {
+  throw new GenericTypeError(code, path, message);
+};
+
+/** One budget across nested aliases/substitutions, including concrete arguments. */
+class Budget {
+  private remaining = 10000;
+  enter(path: string, depth: number) {
+    if (depth > 128 || --this.remaining < 0)
+      fail("type-complexity-limit", path, "Type exceeds the depth or expansion budget");
+  }
+}
+
+export const isStorableType = (
+  type: ValueType,
+  storableMessage: (descriptorId: string) => boolean = () => false,
+): boolean => {
+  const budget = new Budget();
+  const visit = (value: ValueType, depth: number): boolean => {
+    budget.enter("storable", depth);
+    switch (value.kind) {
+      case "scalar":
+        return true;
+      case "builtin":
+        return value.name === "unit";
+      case "message":
+        return storableMessage(value.descriptorId);
+      case "object-ref":
+        return false;
+      case "list":
+      case "optional":
+        return visit(value.value, depth + 1);
+      // Records currently have RPC codecs, not ordinary-state persistence codecs.
+      // A generic bound must not promise storage that the installed model rejects.
+      case "record":
+        return false;
+    }
+  };
+  return visit(type, 0);
+};
+
+/** Canonical closed-type encoding, independent of record insertion order. */
+export const canonicalTypeArgument = (argument: ClosedTypeArgument): string => {
+  const budget = new Budget();
+  const target = (value: ObjectExpectation): unknown => {
+    switch (value.kind) {
+      case "atom":
+        return ["atom", value.atomId];
+      case "interface":
+        return ["interface", value.interfaceRevisionId];
+      default:
+        return fail("unresolved-type", "argument", "Expected a closed object target");
+    }
+  };
+  const type = (value: ValueType, depth: number): unknown => {
+    budget.enter("argument", depth);
+    switch (value.kind) {
+      case "builtin":
+      case "scalar":
+        return [value.kind, value.name];
+      case "message":
+        return ["message", value.descriptorId];
+      case "object-ref":
+        return ["object-ref", target(value.expectation)];
+      case "list":
+      case "optional":
+        return [value.kind, type(value.value, depth + 1)];
+      case "record":
+        return [
+          "record",
+          Object.keys(value.fields)
+            .sort()
+            .map((key) => [key, type(value.fields[key], depth + 1)]),
+        ];
+      default:
+        return fail("unresolved-type", "argument", "Expected a closed value type");
+    }
+  };
+  switch (argument.kind) {
+    case "value":
+      return JSON.stringify(["value", type(argument.type, 0)]);
+    case "object":
+      return JSON.stringify(["object", target(argument.target)]);
+    default:
+      return fail("invalid-kind", "argument", "Expected a value or object type argument");
+  }
+};
+
+export interface AppliedInterfaceIdentity {
+  definitionId: InterfaceRevisionId;
+  source: SourceRevision;
+  arguments: ClosedTypeArgument[];
+  /** Only include Self when it is actually part of the closed contract. */
+  self?: AtomId;
+}
+
+export const appliedInterfaceId = (application: AppliedInterfaceIdentity): InterfaceRevisionId => {
+  const encoding = JSON.stringify([
+    "quixos-applied-interface-v1",
+    application.definitionId,
+    application.source.repository,
+    application.source.commit.toLowerCase(),
+    application.arguments.map(canonicalTypeArgument),
+    application.self ?? null,
+  ]);
+  return capabilityId.interfaceRevision(
+    `interface-application:sha256:${createHash("sha256").update(encoding).digest("hex")}`,
+  );
+};
+
+export class TypeSubstitution {
+  private readonly budget = new Budget();
+  private readonly aliases: string[] = [];
+
+  constructor(private environment: GenericTypeEnvironment) {}
+
+  argument(expression: TypeArgumentExpression, path = "argument", depth = 0): ClosedTypeArgument {
+    this.budget.enter(path, depth);
+    switch (expression.kind) {
+      case "value":
+        return { kind: "value", type: this.value(expression.type, path, depth + 1) };
+      case "object":
+        return { kind: "object", target: this.object(expression.target, path, depth + 1) };
+      default:
+        return fail("invalid-kind", path, "Expected a value or object type argument");
+    }
+  }
+
+  application(expression: InterfaceApplicationExpression, path = "interface", depth = 0): InterfaceRevisionId {
+    this.budget.enter(path, depth);
+    return this.environment.applyInterface(
+      expression.definitionId,
+      expression.arguments.map((argument, index) => this.argument(argument, `${path}.arguments[${index}]`, depth + 1)),
+    );
+  }
+
+  object(expression: ObjectTypeExpression, path = "target", depth = 0): ObjectExpectation {
+    this.budget.enter(path, depth);
+    switch (expression.kind) {
+      case "atom":
+        return { kind: "atom", atomId: expression.atomId };
+      case "interface":
+        return { kind: "interface", interfaceRevisionId: expression.interfaceRevisionId };
+      case "self":
+        return this.environment.self
+          ? { kind: "atom", atomId: this.environment.self }
+          : fail("unbound-self", path, "Self requires an implementing atom");
+      case "parameter": {
+        const argument = this.environment.arguments.get(expression.parameterId);
+        if (!argument) return fail("unbound-parameter", path, `Unbound parameter ${expression.parameterId}`);
+        if (argument.kind !== "object")
+          return fail("parameter-kind", path, `Parameter ${expression.parameterId} is a value, not an object target`);
+        canonicalTypeArgument(argument);
+        return structuredClone(argument.target);
+      }
+      case "application":
+        return { kind: "interface", interfaceRevisionId: this.application(expression.application, path, depth + 1) };
+      default:
+        return fail("invalid-type", path, "Unknown object type expression");
+    }
+  }
+
+  value(expression: ValueTypeExpression, path = "type", depth = 0): ValueType {
+    this.budget.enter(path, depth);
+    switch (expression.kind) {
+      case "builtin":
+        return { kind: "builtin", name: expression.name };
+      case "scalar":
+        return { kind: "scalar", name: expression.name };
+      case "message":
+        return { kind: "message", descriptorId: expression.descriptorId };
+      case "list":
+      case "optional":
+        return { kind: expression.kind, value: this.value(expression.value, `${path}.${expression.kind}`, depth + 1) };
+      case "record":
+        return {
+          kind: "record",
+          fields: Object.fromEntries(
+            Object.entries(expression.fields).map(([name, field]) => [
+              name,
+              this.value(field, `${path}.${name}`, depth + 1),
+            ]),
+          ),
+        };
+      case "object-ref":
+        return { kind: "object-ref", expectation: this.object(expression.expectation, `${path}.ref`, depth + 1) };
+      case "parameter": {
+        const argument = this.environment.arguments.get(expression.parameterId);
+        if (!argument) return fail("unbound-parameter", path, `Unbound parameter ${expression.parameterId}`);
+        if (argument.kind !== "value")
+          return fail("parameter-kind", path, `Parameter ${expression.parameterId} is an object target; use ref<T>`);
+        canonicalTypeArgument(argument);
+        return this.value(argument.type, path, depth + 1);
+      }
+      case "alias": {
+        const alias = this.environment.aliases?.get(expression.definitionId);
+        if (!alias) return fail("unknown-alias", path, `Unknown type alias ${expression.definitionId}`);
+        if (this.aliases.includes(alias.id))
+          return fail("recursive-alias", path, `Recursive value alias: ${[...this.aliases, alias.id].join(" -> ")}`);
+        const arguments_ = expression.arguments.map((argument, index) =>
+          this.argument(argument, `${path}.arguments[${index}]`, depth + 1),
+        );
+        const bindings = bindTypeParameters(alias.parameters, arguments_, this.environment, path);
+        this.aliases.push(alias.id);
+        try {
+          // Reuse this expansion budget/stack; lexical parameter maps are restored.
+          const previous = this.environment;
+          this.environment = { ...previous, arguments: bindings };
+          try {
+            return this.value(alias.body, `${path}.${alias.id}`, depth + 1);
+          } finally {
+            this.environment = previous;
+          }
+        } finally {
+          this.aliases.pop();
+        }
+      }
+      default:
+        return fail("invalid-type", path, "Unknown value type expression");
+    }
+  }
+}
+
+export const bindTypeParameters = (
+  parameters: readonly TypeParameter[],
+  arguments_: readonly ClosedTypeArgument[],
+  environment: GenericTypeEnvironment,
+  path = "parameters",
+): ReadonlyMap<string, ClosedTypeArgument> => {
+  if (parameters.length !== arguments_.length)
+    fail("type-arity", path, `Expected ${parameters.length} type arguments, received ${arguments_.length}`);
+  const bindings = new Map<string, ClosedTypeArgument>();
+  const names = new Set<string>();
+  for (const [index, parameter] of parameters.entries()) {
+    if (
+      !parameter.id ||
+      !parameter.name ||
+      parameter.name === "Self" ||
+      bindings.has(parameter.id) ||
+      names.has(parameter.name)
+    )
+      fail("duplicate-parameter", path, `Invalid or duplicate parameter ${parameter.name}`);
+    names.add(parameter.name);
+    const argument = arguments_[index];
+    if (parameter.kind !== argument.kind)
+      fail("parameter-kind", `${path}.${parameter.name}`, `Expected ${parameter.kind}, received ${argument.kind}`);
+    canonicalTypeArgument(argument);
+    bindings.set(parameter.id, structuredClone(argument));
+  }
+  const substitution = new TypeSubstitution({ ...environment, arguments: bindings });
+  for (const parameter of parameters) {
+    const argument = bindings.get(parameter.id)!;
+    if (
+      parameter.kind === "value" &&
+      argument.kind === "value" &&
+      parameter.storable &&
+      !isStorableType(argument.type, environment.storableMessage)
+    )
+      fail(
+        "non-storable-argument",
+        `${path}.${parameter.name}`,
+        "State values cannot contain managed references or unsupported transport values",
+      );
+    if (parameter.kind === "object" && argument.kind === "object") {
+      for (const bound of parameter.implements) {
+        const required = substitution.application(bound, `${path}.${parameter.name}.implements`);
+        if (!environment.implementsInterface(argument.target, required))
+          fail("unsatisfied-bound", `${path}.${parameter.name}`, `Object target does not implement ${required}`);
+      }
+    }
+  }
+  return bindings;
+};

src/capability-model/index.ts

@@ -1,2 +1,6 @@
 export * from "./types.js";
 export * from "./validation.js";
+export * from "./evolution.js";
+export * from "./migrations.js";
+export * from "./generics.js";
+export * from "./generic-packages.js";

src/capability-model/migrations.ts

@@ -0,0 +1,156 @@
+import { contentDigest } from "./evolution.js";
+import type { PersistentAttachment } from "./types.js";
+
+/** Portable storage shape: local owner/slot/projection identities are supplied
+ * by the consuming workspace's explicit bindings, never baked into this hash. */
+export const migrationPortContract = (attachment: PersistentAttachment): unknown => {
+  if (attachment.kind === "state")
+    return {
+      kind: "state",
+      valueType: attachment.valueType,
+      storagePolicy: attachment.storagePolicy,
+      ...(attachment.defaultValue === undefined ? {} : { defaultValue: attachment.defaultValue }),
+    };
+  const endpoint = (value: (typeof attachment.endpoints)[number]) => ({
+    constraint: value.constraint,
+    cardinality: value.cardinality,
+    ordered: value.ordered,
+    onDelete: value.onDelete ?? "restrict",
+    retainOther: value.retainOther ?? false,
+    ...(value.keyType ? { keyType: value.keyType } : {}),
+    ...(value.publicTraversal ? { publicTraversal: true } : {}),
+  });
+  return { kind: "edge", first: endpoint(attachment.endpoints[0]), second: endpoint(attachment.endpoints[1]) };
+};
+
+export type MigrationDeclaration = {
+  id: string;
+  scopeId: string;
+  from: string;
+  to: string;
+  implementation: { exportId: string; file: string; digest: string };
+  predecessors: string[];
+  ports: {
+    name: string;
+    view: "old" | "new";
+    access: ("read" | "write" | "create" | "edge")[];
+    contractDigest: string;
+  }[];
+  preservesOldReaders?: boolean;
+  preservesOldWriters?: boolean;
+};
+export type MigrationCatalog = {
+  schemaVersion: 1;
+  contracts: Record<string, unknown>;
+  migrations: MigrationDeclaration[];
+};
+export const validateMigrationCatalog = (value: unknown, exportIds?: ReadonlySet<string>): MigrationCatalog => {
+  if (!value || typeof value !== "object" || Array.isArray(value))
+    throw new Error("Migration catalog must be an object");
+  const catalog = value as MigrationCatalog;
+  if (
+    catalog.schemaVersion !== 1 ||
+    !catalog.contracts ||
+    Array.isArray(catalog.contracts) ||
+    !Array.isArray(catalog.migrations)
+  )
+    throw new Error("Unsupported migration catalog");
+  for (const [digest, contract] of Object.entries(catalog.contracts))
+    if (contentDigest(contract) !== digest) throw new Error(`Migration contract digest mismatch: ${digest}`);
+  const ids = new Set<string>();
+  for (const migration of catalog.migrations) {
+    if (!migration.id || !migration.scopeId || ids.has(migration.id))
+      throw new Error("Migration IDs must be stable and unique");
+    ids.add(migration.id);
+    if (!catalog.contracts[migration.from] || !catalog.contracts[migration.to] || migration.from === migration.to)
+      throw new Error(`Migration ${migration.id} requires distinct retained source and target contracts`);
+    if (!migration.implementation?.exportId || !/^sha256:[0-9a-f]{64}$/.test(migration.implementation.digest))
+      throw new Error(`Migration ${migration.id} requires an exact implementation digest`);
+    if (
+      !migration.implementation.file ||
+      migration.implementation.file.startsWith("/") ||
+      migration.implementation.file.split(/[\\/]/).some((part) => !part || part === "." || part === "..")
+    )
+      throw new Error("Migration implementation must be a relative package file");
+    if (exportIds && !exportIds.has(migration.implementation.exportId))
+      throw new Error(`Migration ${migration.id} refers to an undeclared package export`);
+    if (!Array.isArray(migration.predecessors) || !Array.isArray(migration.ports))
+      throw new Error(`Migration ${migration.id} requires predecessors and ports`);
+    if (new Set(migration.predecessors).size !== migration.predecessors.length)
+      throw new Error(`Duplicate predecessor in ${migration.id}`);
+    for (const promise of [migration.preservesOldReaders, migration.preservesOldWriters])
+      if (promise !== undefined && typeof promise !== "boolean")
+        throw new Error("Migration compatibility promises must be booleans");
+    const ports = new Set<string>();
+    for (const port of migration.ports) {
+      if (
+        !port.name ||
+        ports.has(port.name) ||
+        !["old", "new"].includes(port.view) ||
+        !Array.isArray(port.access) ||
+        !port.access.length ||
+        port.access.some((access) => !["read", "write", "create", "edge"].includes(access)) ||
+        !catalog.contracts[port.contractDigest]
+      )
+        throw new Error(`Invalid migration port in ${migration.id}`);
+      if (port.view === "old" && port.access.some((access) => access !== "read"))
+        throw new Error("Old migration views are read-only");
+      ports.add(port.name);
+    }
+  }
+  for (const migration of catalog.migrations)
+    for (const predecessor of migration.predecessors)
+      if (!ids.has(predecessor)) throw new Error(`Missing retained predecessor ${predecessor}`);
+  // Catalogs are retained across releases. Reject impossible histories at
+  // publication/check time, not only when someone tries to select a path.
+  const remaining = new Map(catalog.migrations.map((entry) => [entry.id, new Set(entry.predecessors)]));
+  const ready = [...remaining].filter(([, dependencies]) => dependencies.size === 0).map(([id]) => id);
+  for (let index = 0; index < ready.length; index++) {
+    remaining.delete(ready[index]);
+    for (const [id, dependencies] of remaining)
+      if (dependencies.delete(ready[index]) && dependencies.size === 0) ready.push(id);
+  }
+  if (remaining.size) throw new Error(`Cyclic migration predecessors: ${[...remaining.keys()].join(", ")}`);
+  return catalog;
+};
+
+export type MigrationSelection = {
+  scopeId: string;
+  from: string;
+  to: string;
+  path: string[];
+  bindings: Record<string, string>;
+};
+/** Explicit paths, not shortest-path guesses. Receipts identify code plus local scope mapping. */
+export const selectMigrationPath = (
+  catalog: MigrationCatalog,
+  selection: MigrationSelection,
+  previousReceipts: ReadonlyMap<string, string> = new Map(),
+) => {
+  validateMigrationCatalog(catalog);
+  let current = selection.from;
+  const seen = new Set<string>();
+  const transitions = [];
+  for (const id of selection.path) {
+    const declaration = catalog.migrations.find((entry) => entry.id === id);
+    if (!declaration || declaration.scopeId !== selection.scopeId || declaration.from !== current || seen.has(id))
+      throw new Error(`Invalid selected migration transition ${id}`);
+    for (const predecessor of declaration.predecessors)
+      if (!seen.has(predecessor) && !previousReceipts.has(predecessor))
+        throw new Error(`Unsatisfied predecessor ${predecessor}`);
+    const usedBindings: Record<string, string> = {};
+    for (const port of declaration.ports) {
+      if (!selection.bindings[port.name]) throw new Error(`Missing local migration binding ${port.name}`);
+      usedBindings[port.name] = selection.bindings[port.name];
+    }
+    const digest = contentDigest({ declaration, bindings: usedBindings });
+    const previous = previousReceipts.get(id);
+    if (previous && previous !== digest)
+      throw new Error(`Migration identity ${id} was previously used with different code or scope`);
+    transitions.push({ declaration, bindings: usedBindings, digest, alreadyApplied: Boolean(previous) });
+    seen.add(id);
+    current = declaration.to;
+  }
+  if (current !== selection.to) throw new Error("Selected migration path does not cover the target storage contract");
+  return transitions;
+};

src/capability-model/types.ts

@@ -7,6 +7,7 @@ type OpaqueId<Kind extends string> = string & {
 export type WorkspaceId = OpaqueId<"WorkspaceId">;
 export type WorkspaceRevisionId = OpaqueId<"WorkspaceRevisionId">;
 export type AtomId = OpaqueId<"AtomId">;
+export type ConformanceId = OpaqueId<"ConformanceId">;
 export type InterfaceId = OpaqueId<"InterfaceId">;
 export type InterfaceRevisionId = OpaqueId<"InterfaceRevisionId">;
 export type MemberId = OpaqueId<"MemberId">;
@@ -28,12 +29,11 @@ const opaque = <Kind extends string>(value: string) => value as OpaqueId<Kind>;
  */
 export const capabilityId = {
   workspace: (value: string) => opaque<"WorkspaceId">(value),
-  workspaceRevision: (value: string) =>
+  workspaceRevision: (value: string) => opaque<"WorkspaceRevisionId">(value),
-    opaque<"WorkspaceRevisionId">(value),
   atom: (value: string) => opaque<"AtomId">(value),
+  conformance: (value: string) => opaque<"ConformanceId">(value),
   interface: (value: string) => opaque<"InterfaceId">(value),
-  interfaceRevision: (value: string) =>
+  interfaceRevision: (value: string) => opaque<"InterfaceRevisionId">(value),
-    opaque<"InterfaceRevisionId">(value),
   member: (value: string) => opaque<"MemberId">(value),
   operation: (value: string) => opaque<"OperationId">(value),
   slot: (value: string) => opaque<"SlotId">(value),
@@ -51,15 +51,7 @@ export interface SourceRevision {
   commit: string;
 }
 
-export type ScalarValueTypeName =
+export type ScalarValueTypeName = "bool" | "bytes" | "double" | "int32" | "int64" | "string" | "uint32" | "uint64";
-  | "bool"
-  | "bytes"
-  | "double"
-  | "int32"
-  | "int64"
-  | "string"
-  | "uint32"
-  | "uint64";
 
 export type ObjectExpectation =
   | { kind: "atom"; atomId: AtomId }
@@ -72,6 +64,7 @@ export type ValueType =
   | { kind: "builtin"; name: "unit" | "watch-handle" }
   | { kind: "scalar"; name: ScalarValueTypeName }
   | { kind: "message"; descriptorId: string }
+  | { kind: "record"; fields: Record<string, ValueType> }
   | { kind: "object-ref"; expectation: ObjectExpectation }
   | { kind: "optional"; value: ValueType }
   | { kind: "list"; value: ValueType };
@@ -109,39 +102,32 @@ export interface AtomDefinition {
   documentation?: string;
 }
 
-export type InterfaceOperationMode =
+export type InterfaceOperationMode = "call" | "watch-start" | "watch-stop" | "subscribe" | "unsubscribe";
-  | "call"
-  | "watch-start"
-  | "watch-stop"
-  | "subscribe"
-  | "unsubscribe";
 
-export interface InterfaceOperation {
+export interface InterfaceOperation<Type = ValueType> {
   id: OperationId;
   displayName: string;
-  inputType: ValueType;
+  inputType: Type;
-  outputType: ValueType;
+  outputType: Type;
   mode: InterfaceOperationMode;
+  /** Class capabilities have no object receiver and bind free functions. */
+  scope?: "class";
   /** Required for watch-start/subscribe and absent for other modes. */
-  eventType?: ValueType;
+  eventType?: Type;
 }
 
-interface InterfaceMemberBase {
+interface InterfaceMemberBase<Type = ValueType> {
   id: MemberId;
   displayName: string;
-  operations: InterfaceOperation[];
+  operations: InterfaceOperation<Type>[];
 }
 
-export interface ValueInterfaceMember extends InterfaceMemberBase {
+export interface ValueInterfaceMember<Type = ValueType> extends InterfaceMemberBase<Type> {
   kind: "value";
-  valueType: ValueType;
+  valueType: Type;
 }
 
-export type EdgeCardinality =
+export type EdgeCardinality = "optional-one" | "exactly-one" | "many" | "many-unique";
-  | "optional-one"
-  | "exactly-one"
-  | "many"
-  | "many-unique";
 
 export type EdgeEndpointConstraint =
   | { kind: "atom"; atomId: AtomId }
@@ -150,24 +136,27 @@ export type EdgeEndpointConstraint =
       interfaceRevisionId: InterfaceRevisionId;
     };
 
-export interface RelationshipInterfaceMember extends InterfaceMemberBase {
+export interface RelationshipInterfaceMember<
+  Type = ValueType,
+  Target = EdgeEndpointConstraint,
+> extends InterfaceMemberBase<Type> {
   kind: "relationship";
-  target: EdgeEndpointConstraint;
+  target: Target;
   cardinality: EdgeCardinality;
   ordered: boolean;
 }
 
 /** A named callable capability that is not value or relationship sugar. */
-export interface OperationInterfaceMember extends InterfaceMemberBase {
+export interface OperationInterfaceMember<Type = ValueType> extends InterfaceMemberBase<Type> {
   kind: "operation";
-  inputType: ValueType;
+  inputType: Type;
-  outputType: ValueType;
+  outputType: Type;
 }
 
-export type InterfaceMember =
+export type InterfaceMember<Type = ValueType, Target = EdgeEndpointConstraint> =
-  | ValueInterfaceMember
+  | ValueInterfaceMember<Type>
-  | RelationshipInterfaceMember
+  | RelationshipInterfaceMember<Type, Target>
-  | OperationInterfaceMember;
+  | OperationInterfaceMember<Type>;
 
 export interface InterfaceRevision {
   interfaceId: InterfaceId;
@@ -175,11 +164,15 @@ export interface InterfaceRevision {
   displayName: string;
   source: SourceRevision;
   members: InterfaceMember[];
+  /** Authored generic definition; never an executable contract by itself. */
+  template?: import("./generics.js").GenericInterfaceTemplate;
+  /** Immutable provenance of a closed generic application. */
+  application?: import("./generics.js").AppliedInterfaceIdentity;
+  requiredInterfaces?: InterfaceRevisionId[];
+  argumentRequirements?: { target: ObjectExpectation; required: InterfaceRevisionId }[];
 }
 
-export type StoragePolicy =
+export type StoragePolicy = { kind: "optimistic-register" } | { kind: "crdt-document"; updateType: ValueType };
-  | { kind: "optimistic-register" }
-  | { kind: "crdt-document"; updateType: ValueType };
 
 export interface StateSlotDefinition {
   kind: "state";
@@ -192,11 +185,15 @@ export interface StateSlotDefinition {
 }
 
 export interface EdgeEndpoint {
+  keyType?: "string" | "boolean" | "int64";
+  publicTraversal?: boolean;
   projectionId: EdgeProjectionId;
   displayName: string;
   constraint: EdgeEndpointConstraint;
   cardinality: EdgeCardinality;
   ordered: boolean;
+  onDelete?: "restrict" | "detach" | "cascade-other";
+  retainOther?: boolean;
 }
 
 export interface EdgeDefinition {
@@ -208,18 +205,9 @@ export interface EdgeDefinition {
 
 export type PersistentAttachment = StateSlotDefinition | EdgeDefinition;
 
-export type StatePrimitive =
+export type StatePrimitive = "read" | "write" | "watch-start" | "watch-stop";
-  | "read"
-  | "write"
-  | "watch-start"
-  | "watch-stop";
 
-export type EdgePrimitive =
+export type EdgePrimitive = "resolve" | "connect" | "disconnect" | "watch-start" | "watch-stop";
-  | "resolve"
-  | "connect"
-  | "disconnect"
-  | "watch-start"
-  | "watch-stop";
 
 export type PackageReceiverRequirement =
   | { kind: "any-object" }
@@ -245,7 +233,7 @@ export type DependencyPortRequirement =
       kind: "interface";
       interfaceRevisionId: InterfaceRevisionId;
     }
-  | { kind: "constructor"; atomId: AtomId };
+  | { kind: "constructor"; atomId: AtomId; inputType?: ValueType };
 
 export interface DependencyPort {
   id: DependencyPortId;
@@ -259,6 +247,8 @@ interface PackageExportBase {
   inputType: ValueType;
   outputType: ValueType;
   dependencyPorts: DependencyPort[];
+  /** Closed adapter served by the same immutable package build. */
+  application?: { exportId: PackageExportId; arguments: import("./generics.js").ClosedTypeArgument[]; self?: AtomId };
 }
 
 export interface PackageOperationExport extends PackageExportBase {
@@ -277,17 +267,19 @@ export interface PackageConstructorExport extends PackageExportBase {
   constructsAtom: AtomId;
 }
 
-export type PackageExport =
+export type PackageExport = PackageOperationExport | PackageFunctionExport | PackageConstructorExport;
-  | PackageOperationExport
-  | PackageFunctionExport
-  | PackageConstructorExport;
 
 export interface PackageRevision {
+  genericExports?: import("./generic-packages.js").GenericPackageExport[];
+  argumentRequirements?: { target: ObjectExpectation; required: InterfaceRevisionId }[];
+  migrationCatalog?: import("./migrations.js").MigrationCatalog;
   packageId: PackageId;
   revisionId: PackageRevisionId;
   displayName: string;
   source: SourceRevision;
   exports: PackageExport[];
+  /** Author-declared implementation semantics; omitted legacy values mean 1. */
+  semanticMajor?: number;
 }
 
 export type DependencyBinding =
@@ -353,6 +345,9 @@ export interface OperationBinding {
 }
 
 export interface Conformance {
+  /** Absent only for legacy assemblies awaiting explicit ownership enrollment. */
+  id?: ConformanceId;
+  semanticMajor?: number;
   atomId: AtomId;
   interfaceRevisionId: InterfaceRevisionId;
   privateAttachments: PersistentAttachment[];

src/descriptor-check.ts

@@ -1,10 +1,6 @@
 #!/usr/bin/env node
 import fs from "node:fs";
-import {
+import { packageDescriptorToJson, parsePackageDescriptorTextproto, validatePackageDescriptor } from "./descriptor.js";
-  packageDescriptorToJson,
-  parsePackageDescriptorTextproto,
-  validatePackageDescriptor,
-} from "./descriptor.js";
 
 const usage = (): never => {
   console.error("Usage: quixos-descriptor-check <descriptor.txtpb>");
@@ -14,9 +10,7 @@ const usage = (): never => {
 const path = process.argv[2] ?? usage();
 
 try {
-  const descriptor = parsePackageDescriptorTextproto(
+  const descriptor = parsePackageDescriptorTextproto(fs.readFileSync(path, "utf8"));
-    fs.readFileSync(path, "utf8"),
-  );
   const errors = validatePackageDescriptor(descriptor);
   if (errors.length > 0) {
     for (const error of errors) {

src/descriptor.ts

@@ -14,19 +14,13 @@ const protoPaths = () => {
     path.resolve(process.cwd(), "proto"),
     path.resolve(process.cwd(), "quixos-protocol/proto"),
   ];
-  return [...new Set(candidates)].filter((candidate) =>
+  return [...new Set(candidates)].filter((candidate) => fs.existsSync(path.join(candidate, "quixos/package.proto")));
-    fs.existsSync(path.join(candidate, "quixos/package.proto")),
-  );
 };
 
-export const parsePackageDescriptorTextproto = (
+export const parsePackageDescriptorTextproto = (text: string): PackageDescriptor => {
-  text: string,
-): PackageDescriptor => {
   const paths = protoPaths();
   if (paths.length === 0) {
-    throw new Error(
+    throw new Error("QUIXOS_PROTO_PATH must include quixos-protocol/proto to parse package descriptors");
-      "QUIXOS_PROTO_PATH must include quixos-protocol/proto to parse package descriptors",
-    );
   }
   const result = childProcess.spawnSync(
     "protoc",
@@ -44,9 +38,7 @@ export const parsePackageDescriptorTextproto = (
     throw result.error;
   }
   if (result.status !== 0) {
-    throw new Error(
+    throw new Error(`Failed to parse package descriptor textproto:\n${result.stderr.toString().trim()}`);
-      `Failed to parse package descriptor textproto:\n${result.stderr.toString().trim()}`,
-    );
   }
   return fromBinary(PackageDescriptorSchema, result.stdout);
 };
@@ -56,9 +48,7 @@ export const packageDescriptorToJson = (descriptor: PackageDescriptor) =>
     prettySpaces: 2,
   });
 
-export const validatePackageDescriptor = (
+export const validatePackageDescriptor = (descriptor: PackageDescriptor): string[] => {
-  descriptor: PackageDescriptor,
-): string[] => {
   const errors: string[] = [];
   if (!descriptor.packageId) {
     errors.push("packageId is required");

src/gen/camino/schema_pb.ts

@@ -10,7 +10,7 @@ import type { Message } from "@bufbuild/protobuf";
  * Describes the file camino/schema.proto.
  */
 export const file_camino_schema: GenFile = /*@__PURE__*/
-  fileDesc("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");
+  fileDesc("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");
 
 /**
  * @generated from message camino.AtomDefinition
@@ -47,6 +47,11 @@ export type AtomConformance = Message<"camino.AtomConformance"> & {
    * @generated from field: string interface_revision_id = 2;
    */
   interfaceRevisionId: string;
+
+  /**
+   * @generated from field: string conformance_id = 3;
+   */
+  conformanceId: string;
 };
 
 /**
@@ -89,6 +94,11 @@ export type StateAttachment = Message<"camino.StateAttachment"> & {
    * @generated from field: string default_value_json = 6;
    */
   defaultValueJson: string;
+
+  /**
+   * @generated from field: string owner_conformance_id = 7;
+   */
+  ownerConformanceId: string;
 };
 
 /**
@@ -155,6 +165,32 @@ export type EdgeEndpoint = Message<"camino.EdgeEndpoint"> & {
    * @generated from field: bool ordered = 5;
    */
   ordered: boolean;
+
+  /**
+   * Empty means restrict. Direction is the endpoint being deleted.
+   *
+   * @generated from field: string on_delete = 6;
+   */
+  onDelete: string;
+
+  /**
+   * @generated from field: bool retain_other = 7;
+   */
+  retainOther: boolean;
+
+  /**
+   * Empty for sets/lists, otherwise string, boolean, or int64 map keys.
+   *
+   * @generated from field: string key_type = 8;
+   */
+  keyType: string;
+
+  /**
+   * Explicit read-only dependency injection traversal, not mutation authority.
+   *
+   * @generated from field: bool public_traversal = 9;
+   */
+  publicTraversal: boolean;
 };
 
 /**
@@ -187,6 +223,11 @@ export type EdgeAttachment = Message<"camino.EdgeAttachment"> & {
    * @generated from field: camino.EdgeEndpoint second = 4;
    */
   second?: EdgeEndpoint | undefined;
+
+  /**
+   * @generated from field: string owner_conformance_id = 5;
+   */
+  ownerConformanceId: string;
 };
 
 /**

src/gen/quixos/runtime_pb.ts

@@ -14,7 +14,7 @@ import type { Message } from "@bufbuild/protobuf";
  * Describes the file quixos/runtime.proto.
  */
 export const file_quixos_runtime: GenFile = /*@__PURE__*/
-  fileDesc("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", [file_camino_api, file_quixos_refs]);
+  fileDesc("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", [file_camino_api, file_quixos_refs]);
 
 /**
  * @generated from message quixos.runtime.HandshakeRequest
@@ -24,6 +24,11 @@ export type HandshakeRequest = Message<"quixos.runtime.HandshakeRequest"> & {
    * @generated from field: string orch_protocol_version = 1;
    */
   orchProtocolVersion: string;
+
+  /**
+   * @generated from field: string nonce = 2;
+   */
+  nonce: string;
 };
 
 /**
@@ -51,6 +56,21 @@ export type HandshakeResponse = Message<"quixos.runtime.HandshakeResponse"> & {
    * @generated from field: repeated string export_ids = 3;
    */
   exportIds: string[];
+
+  /**
+   * @generated from field: string instance_id = 4;
+   */
+  instanceId: string;
+
+  /**
+   * @generated from field: string authentication_proof = 5;
+   */
+  authenticationProof: string;
+
+  /**
+   * @generated from field: repeated string capabilities = 6;
+   */
+  capabilities: string[];
 };
 
 /**
@@ -60,6 +80,91 @@ export type HandshakeResponse = Message<"quixos.runtime.HandshakeResponse"> & {
 export const HandshakeResponseSchema: GenMessage<HandshakeResponse> = /*@__PURE__*/
   messageDesc(file_quixos_runtime, 1);
 
+/**
+ * @generated from message quixos.runtime.InvocationContext
+ */
+export type InvocationContext = Message<"quixos.runtime.InvocationContext"> & {
+  /**
+   * @generated from field: string workspace_epoch = 1;
+   */
+  workspaceEpoch: string;
+
+  /**
+   * @generated from field: string instance_id = 2;
+   */
+  instanceId: string;
+
+  /**
+   * @generated from field: string binding_digest = 3;
+   */
+  bindingDigest: string;
+
+  /**
+   * @generated from field: string grant = 4;
+   */
+  grant: string;
+
+  /**
+   * @generated from field: string session_id = 5;
+   */
+  sessionId: string;
+
+  /**
+   * Host-selected owner; packages must not invent workspace-local ownership.
+   *
+   * @generated from field: string owner_conformance_id = 6;
+   */
+  ownerConformanceId: string;
+};
+
+/**
+ * Describes the message quixos.runtime.InvocationContext.
+ * Use `create(InvocationContextSchema)` to create a new message.
+ */
+export const InvocationContextSchema: GenMessage<InvocationContext> = /*@__PURE__*/
+  messageDesc(file_quixos_runtime, 2);
+
+/**
+ * @generated from message quixos.runtime.InvocationControlRequest
+ */
+export type InvocationControlRequest = Message<"quixos.runtime.InvocationControlRequest"> & {
+  /**
+   * @generated from field: string invocation_id = 1;
+   */
+  invocationId: string;
+};
+
+/**
+ * Describes the message quixos.runtime.InvocationControlRequest.
+ * Use `create(InvocationControlRequestSchema)` to create a new message.
+ */
+export const InvocationControlRequestSchema: GenMessage<InvocationControlRequest> = /*@__PURE__*/
+  messageDesc(file_quixos_runtime, 3);
+
+/**
+ * @generated from message quixos.runtime.InvocationStatus
+ */
+export type InvocationStatus = Message<"quixos.runtime.InvocationStatus"> & {
+  /**
+   * @generated from field: string invocation_id = 1;
+   */
+  invocationId: string;
+
+  /**
+   * unknown, running, cancellation-requested, completed, failed
+   *
+   * @generated from field: string state = 2;
+   */
+  state: string;
+};
+
+/**
+ * Describes the message quixos.runtime.InvocationStatus.
+ * Use `create(InvocationStatusSchema)` to create a new message.
+ */
+export const InvocationStatusSchema: GenMessage<InvocationStatus> = /*@__PURE__*/
+  messageDesc(file_quixos_runtime, 4);
+
 /**
  * @generated from message quixos.runtime.InvokeRequest
  */
@@ -88,6 +193,11 @@ export type InvokeRequest = Message<"quixos.runtime.InvokeRequest"> & {
    * @generated from field: repeated quixos.InjectedDependency dependencies = 5;
    */
   dependencies: InjectedDependency[];
+
+  /**
+   * @generated from field: quixos.runtime.InvocationContext context = 6;
+   */
+  context?: InvocationContext | undefined;
 };
 
 /**
@@ -95,7 +205,7 @@ export type InvokeRequest = Message<"quixos.runtime.InvokeRequest"> & {
  * Use `create(InvokeRequestSchema)` to create a new message.
  */
 export const InvokeRequestSchema: GenMessage<InvokeRequest> = /*@__PURE__*/
-  messageDesc(file_quixos_runtime, 2);
+  messageDesc(file_quixos_runtime, 5);
 
 /**
  * @generated from message quixos.runtime.InvokeResponse
@@ -127,7 +237,7 @@ export type InvokeResponse = Message<"quixos.runtime.InvokeResponse"> & {
  * Use `create(InvokeResponseSchema)` to create a new message.
  */
 export const InvokeResponseSchema: GenMessage<InvokeResponse> = /*@__PURE__*/
-  messageDesc(file_quixos_runtime, 3);
+  messageDesc(file_quixos_runtime, 6);
 
 /**
  * @generated from message quixos.runtime.WatchRequest
@@ -157,6 +267,11 @@ export type WatchRequest = Message<"quixos.runtime.WatchRequest"> & {
    * @generated from field: repeated quixos.InjectedDependency dependencies = 5;
    */
   dependencies: InjectedDependency[];
+
+  /**
+   * @generated from field: quixos.runtime.InvocationContext context = 6;
+   */
+  context?: InvocationContext | undefined;
 };
 
 /**
@@ -164,7 +279,7 @@ export type WatchRequest = Message<"quixos.runtime.WatchRequest"> & {
  * Use `create(WatchRequestSchema)` to create a new message.
  */
 export const WatchRequestSchema: GenMessage<WatchRequest> = /*@__PURE__*/
-  messageDesc(file_quixos_runtime, 4);
+  messageDesc(file_quixos_runtime, 7);
 
 /**
  * @generated from message quixos.runtime.DerivedDependency
@@ -196,7 +311,7 @@ export type DerivedDependency = Message<"quixos.runtime.DerivedDependency"> & {
  * Use `create(DerivedDependencySchema)` to create a new message.
  */
 export const DerivedDependencySchema: GenMessage<DerivedDependency> = /*@__PURE__*/
-  messageDesc(file_quixos_runtime, 5);
+  messageDesc(file_quixos_runtime, 8);
 
 /**
  * @generated from message quixos.runtime.WatchEvent
@@ -233,7 +348,7 @@ export type WatchEvent = Message<"quixos.runtime.WatchEvent"> & {
  * Use `create(WatchEventSchema)` to create a new message.
  */
 export const WatchEventSchema: GenMessage<WatchEvent> = /*@__PURE__*/
-  messageDesc(file_quixos_runtime, 6);
+  messageDesc(file_quixos_runtime, 9);
 
 /**
  * @generated from service quixos.runtime.PackageRuntime
@@ -263,6 +378,22 @@ export const PackageRuntime: GenService<{
     input: typeof WatchRequestSchema;
     output: typeof WatchEventSchema;
   },
+  /**
+   * @generated from rpc quixos.runtime.PackageRuntime.GetInvocationStatus
+   */
+  getInvocationStatus: {
+    methodKind: "unary";
+    input: typeof InvocationControlRequestSchema;
+    output: typeof InvocationStatusSchema;
+  },
+  /**
+   * @generated from rpc quixos.runtime.PackageRuntime.CancelInvocation
+   */
+  cancelInvocation: {
+    methodKind: "unary";
+    input: typeof InvocationControlRequestSchema;
+    output: typeof InvocationStatusSchema;
+  },
 }> = /*@__PURE__*/
   serviceDesc(file_quixos_runtime, 0);
 

src/resource-lock/loader.ts

@@ -1,24 +1,11 @@
 import { lstat, readFile } from "node:fs/promises";
 import path from "node:path";
-import {
+import { parseQuixosLockDocument, type QuixosLockDiagnostic, type QuixosLockParseResult } from "./parser.js";
-  parseQuixosLockDocument,
+import type { LockedResource, QuixosLockDocument, QuixosRepositoryLock } from "./types.js";
-  type QuixosLockDiagnostic,
-  type QuixosLockParseResult,
-} from "./parser.js";
-import type {
-  LockedResource,
-  QuixosLockDocument,
-  QuixosRepositoryLock,
-} from "./types.js";
 
 export type QuixosLockSourceReader = (relativePath: string) => Promise<string>;
 
-const diagnostic = (
+const diagnostic = (code: string, message: string, fileName: string, path?: string): QuixosLockDiagnostic => ({
-  code: string,
-  message: string,
-  fileName: string,
-  path?: string,
-): QuixosLockDiagnostic => ({
   phase: "resolution",
   code,
   message,
@@ -38,11 +25,9 @@ export const resolveQuixosLock = async (
   if (root.document.kind !== "root") {
     return {
       ok: false,
-      diagnostics: [diagnostic(
+      diagnostics: [
-        "expected-root-lock",
+        diagnostic("expected-root-lock", "The entrypoint must be a root Quixos lock, not a fragment", rootFileName),
-        "The entrypoint must be a root Quixos lock, not a fragment",
+      ],
-        rootFileName,
-      )],
     };
   }
 
@@ -54,15 +39,16 @@ export const resolveQuixosLock = async (
 
   const addResources = (document: QuixosLockDocument, fileName: string) => {
     for (const resource of document.resources) {
-      const duplicate = resources.find((entry) =>
+      const duplicate = resources.find((entry) => entry.kind === resource.kind && entry.binding === resource.binding);
-        entry.kind === resource.kind && entry.binding === resource.binding);
       if (duplicate) {
-        diagnostics.push(diagnostic(
+        diagnostics.push(
-          "duplicate-resource-binding",
+          diagnostic(
-          `Duplicate ${resource.kind} binding ${resource.binding} across imported lock files`,
+            "duplicate-resource-binding",
-          fileName,
+            `Duplicate ${resource.kind} binding ${resource.binding} across imported lock files`,
-          `${resource.kind}.${resource.binding}`,
+            fileName,
-        ));
+            `${resource.kind}.${resource.binding}`,
+          ),
+        );
       } else {
         resources.push(resource);
       }
@@ -71,11 +57,9 @@ export const resolveQuixosLock = async (
 
   const visit = async (importPath: string) => {
     if (active.includes(importPath)) {
-      diagnostics.push(diagnostic(
+      diagnostics.push(
-        "import-cycle",
+        diagnostic("import-cycle", `Lock import cycle: ${[...active, importPath].join(" -> ")}`, importPath),
-        `Lock import cycle: ${[...active, importPath].join(" -> ")}`,
+      );
-        importPath,
-      ));
       return;
     }
     if (visited.has(importPath)) return;
@@ -84,11 +68,13 @@ export const resolveQuixosLock = async (
     try {
       source = await readSource(importPath);
     } catch (cause) {
-      diagnostics.push(diagnostic(
+      diagnostics.push(
-        "import-read-failed",
+        diagnostic(
-        `Could not read lock import ${importPath}: ${cause instanceof Error ? cause.message : String(cause)}`,
+          "import-read-failed",
-        importPath,
+          `Could not read lock import ${importPath}: ${cause instanceof Error ? cause.message : String(cause)}`,
-      ));
+          importPath,
+        ),
+      );
       active.pop();
       return;
     }
@@ -99,11 +85,13 @@ export const resolveQuixosLock = async (
       return;
     }
     if (parsed.document.kind !== "fragment") {
-      diagnostics.push(diagnostic(
+      diagnostics.push(
-        "imported-root-lock",
+        diagnostic(
-        `Imported file ${importPath} must begin with "quixos-lock fragment"`,
+          "imported-root-lock",
-        importPath,
+          `Imported file ${importPath} must begin with "quixos-lock fragment"`,
-      ));
+          importPath,
+        ),
+      );
       active.pop();
       return;
     }
@@ -131,20 +119,24 @@ export const loadQuixosLock = async (fileName: string): Promise<QuixosLockParseR
   const repositoryRoot = path.dirname(absoluteRoot);
   const rootName = path.basename(absoluteRoot);
   const rootSource = await readFile(absoluteRoot, "utf8");
-  return await resolveQuixosLock(rootSource, async (relativePath) => {
+  return await resolveQuixosLock(
-    let absoluteImport = repositoryRoot;
+    rootSource,
-    const segments = relativePath.split("/");
+    async (relativePath) => {
-    for (const [index, segment] of segments.entries()) {
+      let absoluteImport = repositoryRoot;
-      absoluteImport = path.join(absoluteImport, segment);
+      const segments = relativePath.split("/");
-      const metadata = await lstat(absoluteImport);
+      for (const [index, segment] of segments.entries()) {
-      if (metadata.isSymbolicLink()) {
+        absoluteImport = path.join(absoluteImport, segment);
-        throw new Error("imports must not traverse symbolic links");
+        const metadata = await lstat(absoluteImport);
+        if (metadata.isSymbolicLink()) {
+          throw new Error("imports must not traverse symbolic links");
+        }
+        const final = index === segments.length - 1;
+        if ((!final && !metadata.isDirectory()) || (final && !metadata.isFile())) {
+          throw new Error("imports must be ordinary files beneath ordinary directories");
+        }
       }
-      const final = index === segments.length - 1;
+      return await readFile(absoluteImport, "utf8");
-      if ((!final && !metadata.isDirectory()) || (final && !metadata.isFile())) {
+    },
-        throw new Error("imports must be ordinary files beneath ordinary directories");
+    rootName,
-      }
+  );
-    }
-    return await readFile(absoluteImport, "utf8");
-  }, rootName);
 };

src/resource-lock/parser.ts

@@ -13,13 +13,7 @@ import {
   type QuixosSourceBlockContext,
   type SourceBlockContext,
 } from "./generated/QuixosLockParser.js";
-import type {
+import type { GitSource, LockedResource, QuixosLockDocument, QuixosRepositoryLock, QuixosSource } from "./types.js";
-  GitSource,
-  LockedResource,
-  QuixosLockDocument,
-  QuixosRepositoryLock,
-  QuixosSource,
-} from "./types.js";
 
 export type QuixosLockDiagnostic = {
   phase: "syntax" | "validation" | "resolution";
@@ -66,8 +60,7 @@ class SyntaxErrorListener extends BaseErrorListener {
   }
 }
 
-const stringValue = (context: { getText(): string }): string =>
+const stringValue = (context: { getText(): string }): string => JSON.parse(context.getText()) as string;
-  JSON.parse(context.getText()) as string;
 
 const lowerSource = (context: SourceBlockContext): GitSource => ({
   resolver: "git",
@@ -103,15 +96,16 @@ const issue = (
   path?: string,
   line = 1,
   column = 0,
-) => diagnostics.push({
+) =>
-  phase: "validation",
+  diagnostics.push({
-  code,
+    phase: "validation",
-  message,
+    code,
-  fileName,
+    message,
-  line,
+    fileName,
-  column,
+    line,
-  path,
+    column,
-});
+    path,
+  });
 
 const validateImport = (
   importPath: string,
@@ -123,11 +117,11 @@ const validateImport = (
 ) => {
   const path = `imports[${index}]`;
   if (
-    !importPath
+    !importPath ||
-    || importPath.startsWith("/")
+    importPath.startsWith("/") ||
-    || importPath.includes("\\")
+    importPath.includes("\\") ||
-    || importPath.split("/").some((segment) => !segment || segment === "." || segment === "..")
+    importPath.split("/").some((segment) => !segment || segment === "." || segment === "..") ||
-    || /^[A-Za-z][A-Za-z0-9+.-]*:/.test(importPath)
+    /^[A-Za-z][A-Za-z0-9+.-]*:/.test(importPath)
   ) {
     issue(
       diagnostics,
@@ -141,12 +135,7 @@ const validateImport = (
   }
 };
 
-const validateSource = (
+const validateSource = (source: GitSource, path: string, fileName: string, diagnostics: QuixosLockDiagnostic[]) => {
-  source: GitSource,
-  path: string,
-  fileName: string,
-  diagnostics: QuixosLockDiagnostic[],
-) => {
   if (!/^([0-9a-f]{40}|[0-9a-f]{64})$/.test(source.commit)) {
     issue(
       diagnostics,
@@ -198,25 +187,22 @@ const validateSource = (
   }
 };
 
-const validateQuixosSource = (
+const validateQuixosSource = (source: QuixosSource, fileName: string, diagnostics: QuixosLockDiagnostic[]) => {
-  source: QuixosSource,
-  fileName: string,
-  diagnostics: QuixosLockDiagnostic[],
-) => {
   validateSource(source, "quixos", fileName, diagnostics);
   if (!source.policy) return;
   const forbiddenRefCharacters = new Set("~^:?*[\\");
-  const invalidRef = !source.ref
+  const invalidRef =
-    || [...source.ref].some((character) => {
+    !source.ref ||
+    [...source.ref].some((character) => {
       const code = character.charCodeAt(0);
       return code <= 0x20 || code === 0x7f || forbiddenRefCharacters.has(character);
-    })
+    }) ||
-    || source.ref.startsWith("/")
+    source.ref.startsWith("/") ||
-    || source.ref.endsWith("/")
+    source.ref.endsWith("/") ||
-    || source.ref.endsWith(".")
+    source.ref.endsWith(".") ||
-    || source.ref.includes("..")
+    source.ref.includes("..") ||
-    || source.ref.includes("@{")
+    source.ref.includes("@{") ||
-    || source.ref.includes("//");
+    source.ref.includes("//");
   if (invalidRef) {
     issue(
       diagnostics,
@@ -247,10 +233,7 @@ const validateQuixosSource = (
   }
 };
 
-export const parseQuixosLockDocument = (
+export const parseQuixosLockDocument = (source: string, fileName = "<memory>"): QuixosLockDocumentParseResult => {
-  source: string,
-  fileName = "<memory>",
-): QuixosLockDocumentParseResult => {
   const diagnostics: QuixosLockDiagnostic[] = [];
   const listener = new SyntaxErrorListener(fileName, diagnostics);
   const lexer = new QuixosLockLexer(CharStream.fromString(source));
@@ -299,26 +282,13 @@ export const parseQuixosLockDocument = (
 
   const imports = tree.importEntry().map((context, index) => {
     const importPath = stringValue(context.stringLiteral());
-    validateImport(
+    validateImport(importPath, index, fileName, diagnostics, context.start?.line ?? 1, context.start?.column ?? 0);
-      importPath,
-      index,
-      fileName,
-      diagnostics,
-      context.start?.line ?? 1,
-      context.start?.column ?? 0,
-    );
     return importPath;
   });
   const repeatedImports = new Set<string>();
   imports.forEach((importPath, index) => {
     if (repeatedImports.has(importPath)) {
-      issue(
+      issue(diagnostics, fileName, "duplicate-import", `Duplicate lock import ${importPath}`, `imports[${index}]`);
-        diagnostics,
-        fileName,
-        "duplicate-import",
-        `Duplicate lock import ${importPath}`,
-        `imports[${index}]`,
-      );
     }
     repeatedImports.add(importPath);
   });
@@ -355,36 +325,38 @@ export const parseQuixosLockDocument = (
       };
 };
 
-export const parseQuixosLock = (
+export const parseQuixosLock = (source: string, fileName = "<memory>"): QuixosLockParseResult => {
-  source: string,
-  fileName = "<memory>",
-): QuixosLockParseResult => {
   const parsed = parseQuixosLockDocument(source, fileName);
   if (!parsed.ok) return parsed;
   if (parsed.document.kind === "fragment") {
     return {
       ok: false,
-      diagnostics: [{
+      diagnostics: [
-        phase: "validation",
+        {
-        code: "expected-root-lock",
+          phase: "validation",
-        message: "Expected a root Quixos lock, found a lock fragment",
+          code: "expected-root-lock",
-        fileName,
+          message: "Expected a root Quixos lock, found a lock fragment",
-        line: 1,
+          fileName,
-        column: 0,
+          line: 1,
-      }],
+          column: 0,
+        },
+      ],
     };
   }
   if (parsed.document.imports.length) {
     return {
       ok: false,
-      diagnostics: [{
+      diagnostics: [
-        phase: "resolution",
+        {
-        code: "imports-require-file-resolution",
+          phase: "resolution",
-        message: "This lock has imports and must be loaded from its repository rather than parsed as an isolated string",
+          code: "imports-require-file-resolution",
-        fileName,
+          message:
-        line: 1,
+            "This lock has imports and must be loaded from its repository rather than parsed as an isolated string",
-        column: 0,
+          fileName,
-      }],
+          line: 1,
+          column: 0,
+        },
+      ],
     };
   }
   return {
@@ -407,44 +379,23 @@ const sourceLines = (source: GitSource, indentation: string): string[] => [
 
 const quixosSourceLines = (source: QuixosSource, indentation: string): string[] => [
   `${indentation}repository ${quoted(source.repository)};`,
-  ...(source.policy
+  ...(source.policy ? [`${indentation}policy ${source.policy};`, `${indentation}ref ${quoted(source.ref)};`] : []),
-    ? [
-        `${indentation}policy ${source.policy};`,
-        `${indentation}ref ${quoted(source.ref)};`,
-      ]
-    : []),
   `${indentation}commit ${quoted(source.commit.toLowerCase())};`,
 ];
 
 export const formatQuixosLock = (lock: QuixosRepositoryLock): string => {
-  const lines = [
+  const lines = ["quixos-lock version 1 {", "  quixos source {", ...quixosSourceLines(lock.quixos, "    "), "  }"];
-    "quixos-lock version 1 {",
-    "  quixos source {",
-    ...quixosSourceLines(lock.quixos, "    "),
-    "  }",
-  ];
   for (const resource of lock.resources) {
-    lines.push(
+    lines.push("", `  ${resource.kind} ${resource.binding} source {`, ...sourceLines(resource.source, "    "), "  }");
-      "",
-      `  ${resource.kind} ${resource.binding} source {`,
-      ...sourceLines(resource.source, "    "),
-      "  }",
-    );
   }
   lines.push("}", "");
   return lines.join("\n");
 };
 
 export const formatQuixosLockDocument = (document: QuixosLockDocument): string => {
-  const lines = [
+  const lines = [`quixos-lock${document.kind === "fragment" ? " fragment" : ""} version 1 {`];
-    `quixos-lock${document.kind === "fragment" ? " fragment" : ""} version 1 {`,
-  ];
   if (document.kind === "root") {
-    lines.push(
+    lines.push("  quixos source {", ...quixosSourceLines(document.quixos, "    "), "  }");
-      "  quixos source {",
-      ...quixosSourceLines(document.quixos, "    "),
-      "  }",
-    );
   }
   for (const importPath of document.imports) {
     if (lines.length > 1) lines.push("");
@@ -452,11 +403,7 @@ export const formatQuixosLockDocument = (document: QuixosLockDocument): string =
   }
   for (const resource of document.resources) {
     if (lines.length > 1) lines.push("");
-    lines.push(
+    lines.push(`  ${resource.kind} ${resource.binding} source {`, ...sourceLines(resource.source, "    "), "  }");
-      `  ${resource.kind} ${resource.binding} source {`,
-      ...sourceLines(resource.source, "    "),
-      "  }",
-    );
   }
   lines.push("}", "");
   return lines.join("\n");

src/resource-lock/types.ts

@@ -9,13 +9,17 @@ export type QuixosSourcePolicy = "pinned" | "track-release" | "track-development
 // Resource repositories only need the exact Quixos commit they were authored
 // against. A workspace root additionally declares how a runtime may advance
 // that exact baseline.
-export type QuixosSource = GitSource & ({
+export type QuixosSource = GitSource &
-  policy: QuixosSourcePolicy;
+  (
-  ref: string;
+    | {
-} | {
+        policy: QuixosSourcePolicy;
-  policy?: undefined;
+        ref: string;
-  ref?: undefined;
+      }
-});
+    | {
+        policy?: undefined;
+        ref?: undefined;
+      }
+  );
 
 export type LockedResourceKind = "interface" | "package";
 
@@ -40,9 +44,7 @@ export type QuixosLockFragmentDocument = {
   resources: LockedResource[];
 };
 
-export type QuixosLockDocument =
+export type QuixosLockDocument = QuixosLockRootDocument | QuixosLockFragmentDocument;
-  | QuixosLockRootDocument
-  | QuixosLockFragmentDocument;
 
 export type QuixosRepositoryLock = {
   formatVersion: 1;
@@ -60,8 +62,7 @@ export type NixGitInput = {
 
 export const RETENTION_TAG_PREFIX = "refs/tags/quixos-reachability/";
 
-export const retentionTagForCommit = (commit: string): string =>
+export const retentionTagForCommit = (commit: string): string => `${RETENTION_TAG_PREFIX}${commit.toLowerCase()}`;
-  `${RETENTION_TAG_PREFIX}${commit.toLowerCase()}`;
 
 export const nixGitInput = (source: GitSource): NixGitInput => ({
   type: "git",

test/authoring-converge.test.ts

@@ -0,0 +1,116 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { execFile as callback } from "node:child_process";
+import { promisify } from "node:util";
+import { convergeAuthoring } from "../src/capability-language/authoring-converge.js";
+import { loadQuixosLock } from "../src/resource-lock/index.js";
+const execFile = promisify(callback);
+
+test("source convergence propagates nested edits and unchanged snapshots reach a fixed point", async (context) => {
+  const temporary = await fs.mkdtemp(path.join(os.tmpdir(), "qx-converge-test-"));
+  context.after(() => fs.rm(temporary, { recursive: true, force: true }));
+  const workbench = path.join(temporary, "workbench"),
+    remotes = path.join(temporary, "remotes");
+  await fs.mkdir(path.join(workbench, ".quixos"), { recursive: true });
+  await fs.mkdir(remotes);
+  const origin = "https://convergence.example.test/";
+  const previous = Object.fromEntries(
+    ["GIT_CONFIG_COUNT", "GIT_CONFIG_KEY_0", "GIT_CONFIG_VALUE_0"].map((key) => [key, process.env[key]]),
+  );
+  process.env.GIT_CONFIG_COUNT = "1";
+  process.env.GIT_CONFIG_KEY_0 = `url.file://${remotes}/.insteadOf`;
+  process.env.GIT_CONFIG_VALUE_0 = origin;
+  context.after(() => {
+    for (const [key, value] of Object.entries(previous)) {
+      if (value === undefined) delete process.env[key];
+      else process.env[key] = value;
+    }
+  });
+  const resources = [];
+  let dependency = "";
+  for (const [directory, kind, name] of [
+    ["resources/Base", "interface", "Base"],
+    ["resources/Consumer", "package", "Consumer"],
+    ["root", "workspace", "Root"],
+  ]) {
+    const root = path.join(workbench, directory);
+    await fs.mkdir(root, { recursive: true });
+    await execFile("jj", ["git", "init", "--colocate", root]);
+    await execFile("git", ["init", "--bare", path.join(remotes, name)]);
+    const repository = `${origin}${name}`;
+    await execFile("git", ["-C", root, "remote", "add", "origin", repository]);
+    await fs.writeFile(
+      path.join(root, "quixos.lock"),
+      `quixos-lock version 1 { quixos source { repository "https://example.test/quixos"; commit "${"a".repeat(40)}"; } ${dependency} }`,
+    );
+    await fs.writeFile(path.join(root, `${kind}.qx`), "draft");
+    await execFile("jj", ["status"], { cwd: root });
+    const commit = (
+      await execFile("jj", ["--ignore-working-copy", "log", "--no-graph", "-r", "@", "-T", "commit_id"], { cwd: root })
+    ).stdout.trim();
+    if (kind !== "workspace")
+      resources.push({
+        directory,
+        kind,
+        resourceId: `${kind}:${name}`,
+        source: { resolver: "git", repository, commit },
+      });
+    dependency = `${kind} ${name} source { repository "${repository}"; commit "${commit}"; }`;
+  }
+  await fs.writeFile(path.join(workbench, ".quixos/resource-graph.json"), JSON.stringify({ resources }));
+  const first = await convergeAuthoring(workbench);
+  assert.deepEqual(first.worklist, []);
+  assert.equal(first.converged, true);
+  assert.equal(first.verificationEvidence, false, "source retention never approves even syntactically invalid code");
+  await fs.writeFile(path.join(workbench, "resources/Base/interface.qx"), "edited draft");
+  const second = await convergeAuthoring(workbench);
+  assert.deepEqual(second.worklist, []);
+  assert.notEqual(second.candidate?.commit, first.candidate?.commit);
+  const consumer = await loadQuixosLock(path.join(workbench, "resources/Consumer/quixos.lock"));
+  assert.ok(consumer.ok);
+  assert.equal(
+    consumer.lock.resources[0].source.commit,
+    second.retained.find((entry) => entry.directory === "resources/Base")?.source.commit,
+  );
+  const third = await convergeAuthoring(workbench);
+  assert.deepEqual(third, second);
+  const base = path.join(workbench, "resources/Base");
+  const consumerRoot = path.join(workbench, "resources/Consumer");
+  const goodLock = await fs.readFile(path.join(consumerRoot, "quixos.lock"), "utf8");
+  await fs.writeFile(path.join(consumerRoot, "quixos.lock"), "broken draft");
+  const scoped = await convergeAuthoring(workbench, "resources/Base");
+  assert.deepEqual(scoped.worklist, [], "an unrelated malformed consumer cannot block a provider check");
+  await fs.writeFile(path.join(base, "interface.qx"), "another edit");
+  const partial = await convergeAuthoring(workbench);
+  assert.equal(partial.converged, false);
+  const graph = JSON.parse(await fs.readFile(path.join(workbench, ".quixos/resource-graph.json"), "utf8"));
+  assert.equal(
+    graph.resources[0].source.commit,
+    partial.retained.find((entry) => entry.directory === "resources/Base")?.source.commit,
+  );
+  await fs.writeFile(path.join(consumerRoot, "quixos.lock"), goodLock);
+  const resumed = await convergeAuthoring(workbench);
+  assert.deepEqual(resumed.worklist, []);
+  assert.deepEqual(await convergeAuthoring(workbench), resumed);
+  await execFile("git", ["-C", base, "remote", "set-url", "origin", origin + "Wrong"]);
+  const mismatch = await convergeAuthoring(workbench);
+  assert.ok(mismatch.worklist.some((entry) => entry.phase === "source" && /Origin differs/.test(entry.message)));
+  await execFile("git", ["-C", base, "remote", "set-url", "origin", origin + "Base"]);
+  await fs.rename(path.join(remotes, "Base"), path.join(remotes, "Base-offline"));
+  const offline = await convergeAuthoring(workbench);
+  assert.equal(offline.candidate, null);
+  assert.ok(offline.worklist.some((entry) => entry.phase === "publication"));
+  await fs.rename(path.join(remotes, "Base-offline"), path.join(remotes, "Base"));
+  assert.equal((await convergeAuthoring(workbench)).converged, true);
+  const consumerSource = resumed.retained.find((entry) => entry.directory === "resources/Consumer")!.source;
+  await fs.writeFile(
+    path.join(base, "quixos.lock"),
+    `quixos-lock version 1 { quixos source { repository "https://example.test/quixos"; commit "${"a".repeat(40)}"; } package Consumer source { repository "${consumerSource.repository}"; commit "${consumerSource.commit}"; } }`,
+  );
+  const cycle = await convergeAuthoring(workbench);
+  assert.equal(cycle.candidate, null);
+  assert.ok(cycle.worklist.some((entry) => /Source dependency cycle/.test(entry.message)));
+});

test/authoring-inspect.test.ts

@@ -0,0 +1,40 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import { mkdtemp, writeFile, rm, symlink } from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { execFile as callback } from "node:child_process";
+import { promisify } from "node:util";
+import { inspectAuthoringRepository } from "../src/capability-language/authoring-inspect.js";
+
+const execFile = promisify(callback);
+test("inspection keeps current files and labels historical recovery without granting verification", async (context) => {
+  const root = await mkdtemp(path.join(os.tmpdir(), "qx-inspection-test-"));
+  context.after(() => rm(root, { recursive: true, force: true }));
+  const git = (...args: string[]) => execFile("git", ["-C", root, ...args]);
+  await git("init");
+  await writeFile(
+    path.join(root, "interface.qx"),
+    'interface Example id "interface:example" revision "interface:example@1" {}',
+  );
+  await git("add", ".");
+  await git("-c", "user.name=Test", "-c", "user.email=test@example.test", "commit", "-m", "contract");
+  const commit = (await git("rev-parse", "HEAD")).stdout.trim();
+  await writeFile(path.join(root, "interface.qx"), "interface broken {{{");
+  await writeFile(path.join(root, "new.qx"), 'interface New id "interface:new" revision "interface:new@1" {}');
+  const inspected = await inspectAuthoringRepository(root);
+  assert.equal(inspected.verificationEvidence, false);
+  assert.equal(inspected.resolutionChecked, false);
+  assert.equal(inspected.files[0].status, "historical");
+  assert.equal(inspected.files[0].revision, commit);
+  assert.ok(inspected.files[0].currentErrors.length);
+  assert.match(inspected.files[0].declarations[0].source, /Example/);
+  assert.equal(inspected.files[1].status, "current");
+  assert.match(inspected.files[1].declarations[0].source, /New/);
+  assert.equal((await git("rev-parse", "HEAD")).stdout.trim(), commit);
+  await symlink(path.join(root, "interface.qx"), path.join(root, "linked.qx"));
+  const linked = (await inspectAuthoringRepository(root)).files.find((file) => file.file === "linked.qx")!;
+  assert.equal(linked.status, "unavailable");
+  assert.deepEqual(linked.declarations, []);
+  assert.match(JSON.stringify(linked.currentErrors), /ordinary files/);
+});

test/authoring-worklist.test.ts

@@ -0,0 +1,83 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { execFile as callback } from "node:child_process";
+import { promisify } from "node:util";
+import { authoringWorklist } from "../src/capability-language/authoring-worklist.js";
+import { checkRecordName } from "../src/capability-language/authoring-check.js";
+import { checkerIdentity, snapshotCommit } from "../src/capability-language/checked-build.js";
+const execFile = promisify(callback);
+
+test("worklist grows and clears from current source, dependency and checker observations", async (context) => {
+  const workbench = await fs.mkdtemp(path.join(os.tmpdir(), "qx-worklist-test-"));
+  context.after(() => fs.rm(workbench, { recursive: true, force: true }));
+  const root = path.join(workbench, "root"),
+    provider = path.join(workbench, "resources/Base");
+  await fs.mkdir(root);
+  await fs.mkdir(provider, { recursive: true });
+  await fs.mkdir(path.join(workbench, ".quixos/checks"), { recursive: true });
+  const header = `quixos-lock version 1 { quixos source { repository "https://example.test/quixos"; commit "${"a".repeat(40)}"; }`;
+  for (const directory of [root, provider]) await execFile("jj", ["git", "init", "--colocate", directory]);
+  await fs.writeFile(
+    path.join(provider, "interface.qx"),
+    'interface Base id "interface:base" revision "interface:base@1" {}',
+  );
+  await fs.writeFile(path.join(provider, "quixos.lock"), `${header} }`);
+  const baseCommit = await snapshotCommit(provider);
+  await fs.writeFile(
+    path.join(root, "workspace.qx"),
+    `workspace Test id "workspace:test" revision "workspace:test@1" commit "${"b".repeat(40)}" { import interface Base; }`,
+  );
+  await fs.writeFile(
+    path.join(root, "quixos.lock"),
+    `${header} interface Base source { repository "https://example.test/base"; commit "${baseCommit}"; } }`,
+  );
+  const rootCommit = await snapshotCommit(root);
+  await fs.writeFile(
+    path.join(workbench, ".quixos/resource-graph.json"),
+    JSON.stringify({
+      resources: [
+        {
+          kind: "interface",
+          directory: provider,
+          source: { resolver: "git", repository: "https://example.test/base", commit: baseCommit },
+        },
+      ],
+    }),
+  );
+  assert.equal((await authoringWorklist(workbench)).worklist.filter((entry) => entry.phase === "unchecked").length, 2);
+  const remember = (directory: string, commit: string, checker = checkerIdentity()) =>
+    fs.writeFile(
+      path.join(workbench, ".quixos/checks", checkRecordName(directory)),
+      JSON.stringify({ commit, checker, phase: "checked", blockers: [] }),
+    );
+  await remember("root", rootCommit);
+  await remember("resources/Base", baseCommit);
+  assert.deepEqual((await authoringWorklist(workbench)).worklist, []);
+  await fs.writeFile(path.join(provider, "interface.qx"), "interface broken {{{");
+  const broken = await authoringWorklist(workbench);
+  assert.ok(
+    broken.worklist.some(
+      (entry) => entry.directory === "resources/Base" && entry.phase === "syntax" && /historical/.test(entry.message),
+    ),
+  );
+  assert.ok(broken.worklist.some((entry) => entry.directory === "root" && entry.phase === "dependency"));
+  await fs.writeFile(
+    path.join(provider, "interface.qx"),
+    'interface Base id "interface:base" revision "interface:base@1" {}',
+  );
+  assert.deepEqual((await authoringWorklist(workbench)).worklist, []);
+  await remember("resources/Base", baseCommit, "old-checker");
+  assert.ok((await authoringWorklist(workbench)).worklist.some((entry) => /checker changed/.test(entry.message)));
+  await fs.writeFile(
+    path.join(workbench, ".quixos/checks", checkRecordName("resources/Base")),
+    JSON.stringify({ phase: "publication", blockers: ["source retention unavailable"] }),
+  );
+  assert.ok(
+    (await authoringWorklist(workbench)).worklist.some(
+      (entry) => entry.phase === "publication" && /source retention/.test(entry.message),
+    ),
+  );
+});

test/bindings.test.ts

@@ -0,0 +1,44 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import { compileCapabilityResourceSource } from "../src/capability-language/parser.js";
+import { generateTypeScriptBindings, type BindingSchema } from "../src/bindings/index.js";
+const source = { repository: "https://example.test/p.git", commit: "1".repeat(40) };
+const schemaFor = (body: string): BindingSchema => {
+  const compiled = compileCapabilityResourceSource(
+    `external atom Thing id "thing"; package Demo id "demo" revision "demo@1" { ${body} }`,
+    { source },
+  );
+  assert.equal(compiled.ok, true, JSON.stringify(compiled.diagnostics));
+  if (!compiled.ok || compiled.resource.kind !== "package") throw new Error("expected package");
+  return { format: "quixos-bindings", version: 1, interfaces: [], packages: [compiled.resource.revision] };
+};
+test("generator uses exact IDs, restricted ports, nominal references, and lossless scalar types", () => {
+  const schema = schemaFor(
+    'operation run id "run-id" : list<int64> -> optional<atom-ref<Thing>> mode call receiver atom Thing requires { state payload id "payload-id" : bytes [read]; };',
+  );
+  const generated = generateTypeScriptBindings(schema, "demo@1");
+  assert.match(generated, /Array<bigint>/);
+  assert.match(generated, /Promise<Uint8Array>/);
+  assert.match(generated, /QxObjectRef<"atom:thing">/);
+  assert.doesNotMatch(generated, /"set":/);
+  assert.match(generated, /"run-id": bindQxHandler/);
+  assert.equal(generateTypeScriptBindings(schema, "demo@1"), generated);
+});
+test("missing external types and constructor signatures fail generation", () => {
+  const schema = schemaFor('function run id "run" : unit -> message "example.Payload";');
+  assert.throws(() => generateTypeScriptBindings(schema, "demo@1"), /Missing TypeScript message binding/);
+  assert.match(
+    generateTypeScriptBindings(schema, "demo@1", {
+      messages: { "example.Payload": { module: "./payload.js", export: "payload" } },
+    }),
+    /BindingValue<typeof message0>/,
+  );
+  const constructor = schemaFor(
+    'function run id "run" : unit -> unit requires { constructor thing id "ctor" : Thing; };',
+  );
+  assert.throws(() => generateTypeScriptBindings(constructor, "demo@1"), /explicit input contract/);
+  const typed = schemaFor(
+    'function run id "run" : unit -> unit requires { constructor thing id "ctor" : Thing input string; };',
+  );
+  assert.match(generateTypeScriptBindings(typed, "demo@1"), /construct.*input: string/);
+});

test/bundle-policy.test.ts

@@ -0,0 +1,36 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import { bundlePolicyErrors } from "../src/bindings/bundle-policy.js";
+import { addImplementation } from "../src/capability-language/implementation-edit.js";
+
+test("bundled source policy rejects location and dynamic-loading assumptions, not static assets or runtime I/O", () => {
+  for (const code of [
+    'new URL("../x", import.meta.url)',
+    "__dirname",
+    "__filename",
+    "import(name)",
+    "require(name)",
+    "eval(code)",
+    "new Function(code)",
+  ])
+    assert.ok(bundlePolicyErrors(code, "source.ts").length, code);
+  assert.deepEqual(
+    bundlePolicyErrors(
+      'import source from "./component.js?browser-source"; import fs from "node:fs"; fs.readFile(userSelectedPath);',
+      "source.ts",
+    ),
+    [],
+  );
+  assert.deepEqual(bundlePolicyErrors('// import.meta.url\nconst text = "__dirname";', "source.ts"), []);
+});
+
+test("imperative handler insertion preserves arbitrary existing code and rejects ambiguous targets", () => {
+  const original =
+    'const keep = "createRuntime({fake:1})";\nservePackageRuntime(createRuntime({ existing: customHandler }));\n';
+  const edited = addImplementation(original, "createRuntime", "newHandler", "./impl/new.js");
+  assert.match(edited, /existing: customHandler/);
+  assert.match(edited, /const keep =/);
+  assert.match(edited, /"newHandler": qxImplementation/);
+  assert.throws(() => addImplementation(original, "createRuntime", "existing", "./x.js"), /already exists/);
+  assert.throws(() => addImplementation("createRuntime(one);", "createRuntime", "x", "./x.js"), /Cannot safely/);
+});

test/candidate-check.test.ts

@@ -0,0 +1,57 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import fs from "node:fs/promises";
+import path from "node:path";
+import os from "node:os";
+import { execFile as callback } from "node:child_process";
+import { promisify } from "node:util";
+import { snapshotRepository, checkWorkspaceCandidate } from "../src/capability-language/candidate-check.js";
+const execFile = promisify(callback);
+
+test("candidate snapshots include dirty and new files without changing Git history or index", async (context) => {
+  const directory = await fs.mkdtemp(path.join(os.tmpdir(), "qx-candidate-test-"));
+  context.after(() => fs.rm(directory, { recursive: true, force: true }));
+  const root = path.join(directory, "source");
+  await fs.mkdir(root);
+  const git = (...args: string[]) => execFile("git", ["-C", root, ...args]);
+  await git("init");
+  await fs.writeFile(path.join(root, "tracked"), "original");
+  await fs.writeFile(path.join(root, ".gitignore"), "ignored\n");
+  await git("add", ".");
+  const index = await fs.readFile(path.join(root, ".git/index"));
+  await fs.writeFile(path.join(root, "tracked"), "edited");
+  await fs.writeFile(path.join(root, "new"), "new content");
+  await fs.writeFile(path.join(root, "ignored"), "not source");
+  const snapshot = await snapshotRepository(root, path.join(directory, "snapshot"));
+  assert.equal(await fs.readFile(path.join(snapshot.directory, "tracked"), "utf8"), "edited");
+  assert.equal(await fs.readFile(path.join(snapshot.directory, "new"), "utf8"), "new content");
+  await assert.rejects(fs.access(path.join(snapshot.directory, "ignored")));
+  assert.deepEqual(await fs.readFile(path.join(root, ".git/index")), index);
+  await assert.rejects(git("rev-parse", "--verify", "HEAD"), "no commit was created");
+  await fs.symlink("tracked", path.join(root, "link"));
+  await assert.rejects(snapshotRepository(root, path.join(directory, "rejected")), /regular file/);
+});
+
+test("candidate check produces explicitly non-activation evidence and never overwrites a report", async (context) => {
+  const directory = await fs.mkdtemp(path.join(os.tmpdir(), "qx-check-test-"));
+  context.after(() => fs.rm(directory, { recursive: true, force: true }));
+  const root = path.join(directory, "source"),
+    output = path.join(directory, "check");
+  await fs.mkdir(root);
+  await execFile("jj", ["git", "init", "--colocate", root]);
+  await fs.writeFile(
+    path.join(root, "quixos.lock"),
+    `quixos-lock version 1 { quixos source { repository "https://example.test/quixos.git"; commit "${"a".repeat(40)}"; } }`,
+  );
+  await fs.writeFile(
+    path.join(root, "workspace.qx"),
+    `workspace Test id "workspace:test" revision "workspace:test@1" commit "${"b".repeat(40)}" { atom Subject id "atom:subject"; }`,
+  );
+  const result = await checkWorkspaceCandidate({ root, output });
+  assert.equal(result.candidateOnly, true);
+  assert.equal(result.activationEvidence, false);
+  assert.deepEqual(result.blockers, []);
+  const report = await fs.readFile(path.join(output, "report.json"));
+  await assert.rejects(checkWorkspaceCandidate({ root, output }), /EEXIST/);
+  assert.deepEqual(await fs.readFile(path.join(output, "report.json")), report);
+});

test/capability-assembly.test.ts

@@ -3,10 +3,7 @@ import { mkdtemp, mkdir, rm, writeFile } from "node:fs/promises";
 import os from "node:os";
 import path from "node:path";
 import test from "node:test";
-import {
+import { compileCapabilityResourceRepository, compileWorkspaceRepository } from "../src/capability-language/index.js";
-  compileCapabilityResourceRepository,
-  compileWorkspaceRepository,
-} from "../src/capability-language/index.js";
 
 const quixosCommit = "1".repeat(40);
 const namedCommit = "2".repeat(40);
@@ -28,31 +25,46 @@ test("workspace assembly resolves resource-owned dependencies recursively", asyn
   const named = path.join(directory, "named");
   const runtime = path.join(directory, "runtime");
   await Promise.all([mkdir(root), mkdir(named), mkdir(runtime)]);
-  await writeFile(path.join(root, "quixos.lock"), lock(`package Runtime source {
+  await writeFile(
+    path.join(root, "quixos.lock"),
+    lock(`package Runtime source {
     repository "https://example.test/package-runtime.git";
     commit "${packageCommit}";
-  }`));
+  }`),
-  await writeFile(path.join(root, "workspace.qx"), `workspace Test id "workspace:test" revision "workspace:test@1" commit "${"4".repeat(40)}" {
+  );
+  await writeFile(
+    path.join(root, "workspace.qx"),
+    `workspace Test id "workspace:test" revision "workspace:test@1" commit "${"4".repeat(40)}" {
     atom Subject id "atom:subject";
     import package Runtime;
   }
-`);
+`,
+  );
   await writeFile(path.join(named, "quixos.lock"), lock());
-  await writeFile(path.join(named, "interface.qx"), `interface Named id "interface:named" revision "interface:named@1" {
+  await writeFile(
+    path.join(named, "interface.qx"),
+    `interface Named id "interface:named" revision "interface:named@1" {
     value name id "member:named:name" : string {
       get id "operation:named:name:get";
     }
   }
-`);
+`,
-  await writeFile(path.join(runtime, "quixos.lock"), lock(`interface Named source {
+  );
+  await writeFile(
+    path.join(runtime, "quixos.lock"),
+    lock(`interface Named source {
     repository "https://example.test/interface-named.git";
     commit "${namedCommit}";
-  }`));
+  }`),
-  await writeFile(path.join(runtime, "package.qx"), `import interface Named;
+  );
+  await writeFile(
+    path.join(runtime, "package.qx"),
+    `import interface Named;
 package Runtime id "package:runtime" revision "package:runtime@1" {
   function describe id "export:runtime:describe" : interface-ref<Named> -> string;
 }
-`);
+`,
+  );
 
   const directories = new Map([
     [`interface\0https://example.test/interface-named.git\0${namedCommit}`, named],
@@ -100,15 +112,21 @@ package Runtime id "package:runtime" revision "package:runtime@1" {
 test("resource repositories cannot own workspace Quixos selection policy", async (context) => {
   const directory = await mkdtemp(path.join(os.tmpdir(), "quixos-resource-policy-"));
   context.after(() => rm(directory, { recursive: true, force: true }));
-  await writeFile(path.join(directory, "quixos.lock"), `quixos-lock version 1 {
+  await writeFile(
+    path.join(directory, "quixos.lock"),
+    `quixos-lock version 1 {
     quixos source {
       repository "https://example.test/quixos.git";
       policy track-development;
       ref "dev/alice/main";
       commit "${quixosCommit}";
     }
-  }`);
+  }`,
-  await writeFile(path.join(directory, "package.qx"), `package Runtime id "package:runtime" revision "package:runtime@1" { }\n`);
+  );
+  await writeFile(
+    path.join(directory, "package.qx"),
+    `package Runtime id "package:runtime" revision "package:runtime@1" { }\n`,
+  );
 
   await assert.rejects(
     compileCapabilityResourceRepository({
@@ -131,19 +149,28 @@ test("resource manifests cannot hide lock dependencies", async (context) => {
   const root = path.join(directory, "root");
   const runtime = path.join(directory, "runtime");
   await Promise.all([mkdir(root), mkdir(runtime)]);
-  await writeFile(path.join(root, "quixos.lock"), lock(`package Runtime source {
+  await writeFile(
+    path.join(root, "quixos.lock"),
+    lock(`package Runtime source {
     repository "https://example.test/package-runtime.git";
     commit "${packageCommit}";
-  }`));
+  }`),
-  await writeFile(path.join(root, "workspace.qx"), `workspace Test id "workspace:test" revision "workspace:test@1" commit "${"4".repeat(40)}" {
+  );
+  await writeFile(
+    path.join(root, "workspace.qx"),
+    `workspace Test id "workspace:test" revision "workspace:test@1" commit "${"4".repeat(40)}" {
     atom Subject id "atom:subject";
     import package Runtime;
   }
-`);
+`,
+  );
   await writeFile(path.join(runtime, "quixos.lock"), lock());
-  await writeFile(path.join(runtime, "package.qx"), `import interface Hidden;
+  await writeFile(
+    path.join(runtime, "package.qx"),
+    `import interface Hidden;
 package Runtime id "package:runtime" revision "package:runtime@1" { }
-`);
+`,
+  );
 
   await assert.rejects(
     compileWorkspaceRepository({
@@ -160,19 +187,28 @@ test("workspace assembly must satisfy nominal external interfaces", async (conte
   const root = path.join(directory, "root");
   const runtime = path.join(directory, "runtime");
   await Promise.all([mkdir(root), mkdir(runtime)]);
-  await writeFile(path.join(root, "quixos.lock"), lock(`package Runtime source {
+  await writeFile(
+    path.join(root, "quixos.lock"),
+    lock(`package Runtime source {
     repository "https://example.test/package-runtime.git";
     commit "${packageCommit}";
-  }`));
+  }`),
-  await writeFile(path.join(root, "workspace.qx"), `workspace Test id "workspace:test" revision "workspace:test@1" commit "${"4".repeat(40)}" {
+  );
+  await writeFile(
+    path.join(root, "workspace.qx"),
+    `workspace Test id "workspace:test" revision "workspace:test@1" commit "${"4".repeat(40)}" {
     atom Subject id "atom:subject";
     import package Runtime;
   }
-`);
+`,
+  );
   await writeFile(path.join(runtime, "quixos.lock"), lock());
-  await writeFile(path.join(runtime, "package.qx"), `external interface Named revision "interface:named@1";
+  await writeFile(
+    path.join(runtime, "package.qx"),
+    `external interface Named revision "interface:named@1";
 package Runtime id "package:runtime" revision "package:runtime@1" { }
-`);
+`,
+  );
 
   await assert.rejects(
     compileWorkspaceRepository({

test/capability-cli.test.ts

@@ -0,0 +1,29 @@
+import assert from "node:assert/strict";
+import { spawnSync } from "node:child_process";
+import { resolve } from "node:path";
+import { test } from "node:test";
+
+const cli = resolve(process.cwd(), "dist/src/capability-language/cli.js");
+
+const runResourceCheck = (source: string) =>
+  spawnSync(process.execPath, [cli, "--resource", "--check", "-"], { input: source, encoding: "utf8" });
+
+test("capability CLI checks a standalone interface resource", () => {
+  const result =
+    runResourceCheck(`interface WeatherBase id "interface:weather-base" revision "interface:weather-base@1" {
+  value temperature id "member:weather:temperature" : double {
+    get id "operation:weather:temperature:get";
+  }
+}\n`);
+  assert.equal(result.status, 0, result.stderr);
+  assert.equal(result.stdout, "");
+});
+
+test("capability CLI reports invalid standalone interface members", () => {
+  const result =
+    runResourceCheck(`interface WeatherBase id "interface:weather-base" revision "interface:weather-base@1" {
+  value temperature : definitely-not-a-type;
+}\n`);
+  assert.notEqual(result.status, 0);
+  assert.match(result.stderr, /syntax-error/);
+});

test/capability-language.test.ts

@@ -2,10 +2,7 @@ import assert from "node:assert/strict";
 import { readFileSync } from "node:fs";
 import { resolve } from "node:path";
 import { test } from "node:test";
-import {
+import { compileCapabilityResourceSource, compileCapabilitySource } from "../src/capability-language/index.js";
-  compileCapabilityResourceSource,
-  compileCapabilitySource,
-} from "../src/capability-language/index.js";
 import {
   capabilityFixtureSource,
   capabilityResourceSources,
@@ -13,81 +10,77 @@ import {
   fixtureId,
 } from "./fixtures/capability-model.js";
 
+test("RPC record fields retain declared reference targets and reject duplicate fields", () => {
+  const compile = (fields: string) =>
+    compileCapabilityResourceSource(
+      `
+external atom Board id "atom:board";
+package Runtime id "package:runtime" revision "package:runtime@1" {
+  function move id "export:move" : record { ${fields} } -> unit;
+}`,
+      { source: { repository: "https://example.test/runtime.git", commit: "a".repeat(40) } },
+    );
+  const result = compile("board: atom-ref<Board>; position: record { x: double; y: double; }; note: optional<string>;");
+  assert.equal(result.ok, true, JSON.stringify(result.diagnostics));
+  assert.equal(compile("board: atom-ref<Board>; board: string;").ok, false);
+});
+
 const compileWebStudioFixture = (packageTransform = (source: string) => source) => {
-  const fixture = (name: string) => readFileSync(
+  const fixture = (name: string) => readFileSync(resolve(process.cwd(), "test/fixtures", name), "utf8");
-    resolve(process.cwd(), "test/fixtures", name),
+  const react = compileCapabilityResourceSource(fixture("react-component.interface.qx"), {
-    "utf8",
+    source: {
-  );
+      repository: "https://repos.quixos.org/org-quixos-web-studio/interface-react-component.git",
-  const react = compileCapabilityResourceSource(
+      commit: "2".repeat(40),
-    fixture("react-component.interface.qx"),
-    {
-      source: {
-        repository: "https://repos.quixos.org/org-quixos-web-studio/interface-react-component.git",
-        commit: "2".repeat(40),
-      },
     },
-  );
+  });
   if (!react.ok || react.resource.kind !== "interface") {
     throw new Error("ReactComponent fixture did not compile");
   }
-  const named = compileCapabilityResourceSource(
+  const named = compileCapabilityResourceSource(fixture("named.interface.qx"), {
-    fixture("named.interface.qx"),
+    source: {
-    {
+      repository: "https://repos.quixos.org/quixos-test/interface-named.git",
-      source: {
+      commit: "5".repeat(40),
-        repository: "https://repos.quixos.org/quixos-test/interface-named.git",
-        commit: "5".repeat(40),
-      },
     },
-  );
+  });
   if (!named.ok || named.resource.kind !== "interface") {
     throw new Error("Named fixture did not compile");
   }
-  const has = compileCapabilityResourceSource(
+  const has = compileCapabilityResourceSource(fixture("has-react-component.interface.qx"), {
-    fixture("has-react-component.interface.qx"),
+    source: {
-    {
+      repository: "https://repos.quixos.org/org-quixos-web-studio/interface-has-react-component.git",
-      source: {
+      commit: "3".repeat(40),
-        repository: "https://repos.quixos.org/org-quixos-web-studio/interface-has-react-component.git",
-        commit: "3".repeat(40),
-      },
-      environment: {
-        interfaces: new Map([["ReactComponent", react.resource.revision]]),
-        interfaceClosure: [react.resource.revision],
-      },
     },
-  );
+    environment: {
+      interfaces: new Map([["ReactComponent", react.resource.revision]]),
+      interfaceClosure: [react.resource.revision],
+    },
+  });
   if (!has.ok || has.resource.kind !== "interface") {
     throw new Error("HasReactComponent fixture did not compile");
   }
-  const component = compileCapabilityResourceSource(
+  const component = compileCapabilityResourceSource(packageTransform(fixture("component-runtime.package.qx")), {
-    packageTransform(fixture("component-runtime.package.qx")),
+    source: {
-    {
+      repository: "https://repos.quixos.org/quixos-test/package-component-runtime.git",
-      source: {
+      commit: "4".repeat(40),
-        repository: "https://repos.quixos.org/quixos-test/package-component-runtime.git",
-        commit: "4".repeat(40),
-      },
-      environment: {
-        interfaces: new Map([["Named", named.resource.revision]]),
-        interfaceClosure: [named.resource.revision],
-      },
     },
-  );
+    environment: {
+      interfaces: new Map([["Named", named.resource.revision]]),
+      interfaceClosure: [named.resource.revision],
+    },
+  });
   if (!component.ok || component.resource.kind !== "package") {
     throw new Error("ComponentRuntime fixture did not compile");
   }
-  return compileCapabilitySource(
+  return compileCapabilitySource(fixture("web-studio.capabilities.qx"), "web-studio.capabilities.qx", {
-    fixture("web-studio.capabilities.qx"),
+    interfaces: new Map([
-    "web-studio.capabilities.qx",
+      ["Named", named.resource.revision],
-    {
+      ["ReactComponent", react.resource.revision],
-      interfaces: new Map([
+      ["HasReactComponent", has.resource.revision],
-        ["Named", named.resource.revision],
+    ]),
-        ["ReactComponent", react.resource.revision],
+    packages: new Map([["ComponentRuntime", component.resource.revision]]),
-        ["HasReactComponent", has.resource.revision],
+    interfaceClosure: [named.resource.revision, react.resource.revision, has.resource.revision],
-      ]),
+    packageClosure: [component.resource.revision],
-      packages: new Map([["ComponentRuntime", component.resource.revision]]),
+  });
-      interfaceClosure: [named.resource.revision, react.resource.revision, has.resource.revision],
-      packageClosure: [component.resource.revision],
-    },
-  );
 };
 
 test("ANTLR parses and validates a complete capability workspace", () => {
@@ -101,23 +94,23 @@ test("ANTLR parses and validates a complete capability workspace", () => {
   assert.equal("id" in result.workspace.conformances[0]!, false);
 });
 
-test("conformances do not accept authored IDs", () => {
+test("conformances preserve authored migration lineage IDs", () => {
   const result = compileCapabilityFixture({
     workspace: capabilityFixtureSource.replace(
       "conform Project as Named {",
       'conform Project as Named id "conformance:project:named" {',
     ),
   });
-  assert.equal(result.ok, false);
+  assert.equal(result.ok, true);
-  if (result.ok) return;
+  if (!result.ok) return;
-  assert.ok(result.diagnostics.some((entry) => entry.phase === "syntax"));
+  assert.equal(result.workspace.conformances[0]!.id, "conformance:project:named");
 });
 
 test("the v1 language has no implicit relationship materialization rule", () => {
   const result = compileCapabilityFixture({
     workspace: capabilityFixtureSource.replace(
       /\n}\s*$/,
-      '\n  materialize ProjectOwner.owner if absent with Person;\n}\n',
+      "\n  materialize ProjectOwner.owner if absent with Person;\n}\n",
     ),
   });
   assert.equal(result.ok, false);
@@ -129,10 +122,7 @@ test("forward declarations make source order irrelevant", () => {
   const source = capabilityFixtureSource
     .replace(/  atom Project[^\n]*\n/, "")
     .replace(/  atom Person[^\n]*\n/, "")
-    .replace(
+    .replace(/\n}\s*$/, '\n  atom Project id "atom:project";\n  atom Person id "atom:person";\n}\n');
-      /\n}\s*$/,
-      '\n  atom Project id "atom:project";\n  atom Person id "atom:person";\n}\n',
-    );
   assert.equal(compileCapabilityFixture({ workspace: source }).ok, true);
 });
 
@@ -142,24 +132,23 @@ test("interfaces can declare ordinary call operations", () => {
     "bind summarize.call to package TodoRuntime.summaryGet",
   );
   const summary = capabilityResourceSources.summary.replace(
-    "  value summary id \"member:summary:summary\" : string {\n    get id \"operation:summary:summary:get\";\n  }",
+    '  value summary id "member:summary:summary" : string {\n    get id "operation:summary:summary:get";\n  }',
-    "  operation summarize id \"member:summary:summarize\" : string -> string {\n    call id \"operation:summary:summarize\";\n  }",
+    '  operation summarize id "member:summary:summarize" : string -> string {\n    call id "operation:summary:summarize";\n  }',
   );
   const todo = capabilityResourceSources.todo.replace(
-    "operation summaryGet id \"export:todo-runtime:summary-get\" : unit -> string",
+    'operation summaryGet id "export:todo-runtime:summary-get" : unit -> string',
-    "operation summaryGet id \"export:todo-runtime:summary-get\" : string -> string",
+    'operation summaryGet id "export:todo-runtime:summary-get" : string -> string',
   );
   const result = compileCapabilityFixture({ workspace, summary, todo });
   assert.equal(result.ok, true);
   if (!result.ok) return;
-  const member = result.workspace.interfaceImports
+  const member = result.workspace.interfaceImports.find((entry) => entry.displayName === "Summary")?.members[0];
-    .find((entry) => entry.displayName === "Summary")?.members[0];
   assert.equal(member?.kind, "operation");
 });
 
 test("state defaults accept recursive JSON values", () => {
   const source = capabilityFixtureSource.replace(
-    '    policy optimistic-register default "Untitled project";',
+    /policy optimistic-register default "Untitled project";/,
     `    policy optimistic-register default "Untitled project";
   shared state ProjectMetadata id "slot:project:metadata" on Project : message "example.Metadata"
     policy optimistic-register default {"labels":["compiler","runtime"],"score":1.5,"enabled":true,"extra":null};`,
@@ -167,9 +156,7 @@ test("state defaults accept recursive JSON values", () => {
   const result = compileCapabilityFixture({ workspace: source });
   assert.equal(result.ok, true);
   if (!result.ok) return;
-  const metadata = result.workspace.sharedAttachments.find(
+  const metadata = result.workspace.sharedAttachments.find((entry) => entry.id === "slot:project:metadata");
-    (entry) => entry.id === "slot:project:metadata",
-  );
   assert.equal(metadata?.kind, "state");
   if (metadata?.kind !== "state") return;
   assert.deepEqual(metadata.defaultValue, {
@@ -186,25 +173,20 @@ test("syntax errors retain source locations", () => {
   });
   assert.equal(result.ok, false);
   if (result.ok) return;
-  assert.ok(result.diagnostics.some((entry) =>
+  assert.ok(result.diagnostics.some((entry) => entry.phase === "syntax" && entry.line > 0));
-    entry.phase === "syntax" && entry.line > 0
-  ));
 });
 
 test("unknown authoring names are lowering errors", () => {
   const result = compileCapabilityFixture({
-    workspace: capabilityFixtureSource.replace(
+    workspace: capabilityFixtureSource.replace("to state ProjectTitle.read", "to state NotAState.read"),
-      "to state ProjectTitle.read",
-      "to state NotAState.read",
-    ),
   });
   assert.equal(result.ok, false);
   if (result.ok) return;
-  assert.ok(result.diagnostics.some((entry) =>
+  assert.ok(
-    entry.phase === "lowering" &&
+    result.diagnostics.some(
-    entry.code === "unknown-symbol" &&
+      (entry) => entry.phase === "lowering" && entry.code === "unknown-symbol" && entry.message.includes("NotAState"),
-    entry.message.includes("NotAState")
+    ),
-  ));
+  );
 });
 
 test("well-formed but invalid programs report semantic paths", () => {
@@ -216,9 +198,7 @@ test("well-formed but invalid programs report semantic paths", () => {
   });
   assert.equal(result.ok, false);
   if (result.ok) return;
-  const diagnostic = result.diagnostics.find(
+  const diagnostic = result.diagnostics.find((entry) => entry.code === "invalid-state-binding");
-    (entry) => entry.code === "invalid-state-binding",
-  );
   assert.ok(diagnostic);
   assert.equal(diagnostic.phase, "validation");
   assert.ok(diagnostic.path?.includes("operationBindings"));
@@ -229,20 +209,21 @@ test("Web Studio sidecars declare lazy materialization and checked cross-object
   assert.equal(result.ok, true);
   if (!result.ok) return;
 
-  const host = result.workspace.conformances.find((entry) =>
+  const host = result.workspace.conformances.find(
-    entry.atomId === "atom:project" &&
+    (entry) =>
-    entry.interfaceRevisionId === "interface:org.quixos.web-studio.has-react-component@1"
+      entry.atomId === "atom:project" &&
+      entry.interfaceRevisionId === "interface:org.quixos.web-studio.has-react-component@1",
   );
-  assert.deepEqual(host?.relationshipMaterializations, [{
+  assert.deepEqual(host?.relationshipMaterializations, [
-    memberId: "member:org.quixos.web-studio.has-react-component:component",
+    {
-    constructorAtomId: "atom:project-component",
+      memberId: "member:org.quixos.web-studio.has-react-component:component",
-    edgeTypeId: "edge:project:component",
+      constructorAtomId: "atom:project-component",
-    constructedProjectionId: "projection:component:subject",
+      edgeTypeId: "edge:project:component",
-  }]);
+      constructedProjectionId: "projection:component:subject",
+    },
+  ]);
 
-  const component = result.workspace.conformances.find((entry) =>
+  const component = result.workspace.conformances.find((entry) => entry.atomId === "atom:project-component");
-    entry.atomId === "atom:project-component"
-  );
   const binding = component?.operationBindings[0]?.binding;
   assert.equal(binding?.kind, "package");
   if (binding?.kind !== "package") return;
@@ -257,35 +238,40 @@ test("Web Studio sidecars declare lazy materialization and checked cross-object
 });
 
 test("relationship materializers require a constructor from the host atom", () => {
-  const result = compileWebStudioFixture((source) => source.replace(
+  const result = compileWebStudioFixture((source) =>
-    "constructs ProjectComponent : atom-ref<Project>;",
+    source.replace("constructs ProjectComponent : atom-ref<Project>;", "constructs ProjectComponent : unit;"),
-    "constructs ProjectComponent : unit;",
+  );
-  ));
   assert.equal(result.ok, false);
   if (result.ok) return;
-  assert.ok(result.diagnostics.some((entry) =>
+  assert.ok(
-    entry.code === "invalid-relationship-materialization" &&
+    result.diagnostics.some(
-    entry.message.includes("must accept")
+      (entry) => entry.code === "invalid-relationship-materialization" && entry.message.includes("must accept"),
-  ));
+    ),
+  );
 });
 
 test("callable interface ports require a full source dependency, not a nominal reference", () => {
-  const result = compileCapabilityResourceSource(`
+  const result = compileCapabilityResourceSource(
+    `
 external interface Named revision "interface:named@1";
 package Runtime id "package:runtime" revision "package:runtime@1" {
   function readName id "export:runtime:read-name" : unit -> string requires {
     interface named id "port:runtime:named" : Named;
   };
 }
-`, {
+`,
-    source: {
+    {
-      repository: "https://repos.quixos.org/quixos-test/package-runtime.git",
+      source: {
-      commit: "6".repeat(40),
+        repository: "https://repos.quixos.org/quixos-test/package-runtime.git",
+        commit: "6".repeat(40),
+      },
     },
-  });
+  );
   assert.equal(result.ok, false);
   if (result.ok) return;
-  assert.ok(result.diagnostics.some((entry) =>
+  assert.ok(
-    entry.code === "nominal-interface-port" && entry.message.includes("import interface Named")
+    result.diagnostics.some(
-  ));
+      (entry) => entry.code === "nominal-interface-port" && entry.message.includes("import interface Named"),
+    ),
+  );
 });

test/capability-model.test.ts

@@ -9,37 +9,53 @@ import {
   type CapabilityValidationIssueCode,
   type WorkspaceRevision,
 } from "../src/capability-model/index.js";
-import {
+import { fixtureId, makeValidCapabilityWorkspace } from "./fixtures/capability-model.js";
-  fixtureId,
-  makeValidCapabilityWorkspace,
-} from "./fixtures/capability-model.js";
 
-const expectIssue = (
+test("ordinary state rejects managed references even under list/optional wrappers", () => {
-  workspace: WorkspaceRevision,
+  const workspace = makeValidCapabilityWorkspace();
-  code: CapabilityValidationIssueCode,
+  const state = [
-) => {
+    ...workspace.sharedAttachments,
+    ...workspace.conformances.flatMap((entry) => entry.privateAttachments),
+  ].find((entry) => entry.kind === "state")!;
+  if (state.kind !== "state") throw new Error("fixture missing state");
+  state.valueType = {
+    kind: "list",
+    value: { kind: "optional", value: { kind: "object-ref", expectation: { kind: "atom", atomId: state.attachedTo } } },
+  };
+  assert.ok(validateWorkspaceRevision(workspace).some((entry) => entry.message.includes("graph relationships")));
+});
+
+const expectIssue = (workspace: WorkspaceRevision, code: CapabilityValidationIssueCode) => {
   const issues = validateWorkspaceRevision(workspace);
   assert.ok(
     issues.some((entry) => entry.code === code),
-    `Expected ${code}, got:\n${issues
+    `Expected ${code}, got:\n${issues.map((entry) => `${entry.code} ${entry.path}: ${entry.message}`).join("\n")}`,
-      .map((entry) => `${entry.code} ${entry.path}: ${entry.message}`)
-      .join("\n")}`,
   );
   assert.equal(compileWorkspaceRevision(workspace).ok, false);
 };
 
+test("constructor dependency input contracts match the selected constructor", () => {
+  const workspace = makeValidCapabilityWorkspace();
+  const port = workspace.packageImports
+    .flatMap((pkg) => pkg.exports)
+    .flatMap((entry) => entry.dependencyPorts)
+    .find((port) => port.requirement.kind === "constructor")!;
+  assert.equal(port.requirement.kind, "constructor");
+  if (port.requirement.kind !== "constructor") return;
+  port.requirement.inputType = valueType.unit;
+  assert.deepEqual(validateWorkspaceRevision(workspace), []);
+  port.requirement.inputType = valueType.string;
+  expectIssue(workspace, "invalid-dependency-binding");
+});
+
 const conformance = (
   workspace: WorkspaceRevision,
   identity: Pick<(typeof workspace.conformances)[number], "atomId" | "interfaceRevisionId">,
 ) => {
-  const result = workspace.conformances.find((entry) =>
+  const result = workspace.conformances.find(
-    entry.atomId === identity.atomId &&
+    (entry) => entry.atomId === identity.atomId && entry.interfaceRevisionId === identity.interfaceRevisionId,
-    entry.interfaceRevisionId === identity.interfaceRevisionId
-  );
-  assert.ok(
-    result,
-    `Missing fixture conformance ${identity.atomId} as ${identity.interfaceRevisionId}`,
   );
+  assert.ok(result, `Missing fixture conformance ${identity.atomId} as ${identity.interfaceRevisionId}`);
   return result;
 };
 
@@ -50,12 +66,7 @@ test("the representative v1 workspace compiles to native and package plans", ()
   assert.equal(compiled.ok, true);
   if (!compiled.ok) return;
 
-  const title = resolveOperationPlan(
+  const title = resolveOperationPlan(compiled.plan, fixtureId.project, fixtureId.namedV1, fixtureId.namedGet);
-    compiled.plan,
-    fixtureId.project,
-    fixtureId.namedV1,
-    fixtureId.namedGet,
-  );
   assert.equal(title?.kind, "state");
   if (title?.kind === "state") {
     assert.equal(title.binding.slotId, fixtureId.projectTitle);
@@ -63,12 +74,7 @@ test("the representative v1 workspace compiles to native and package plans", ()
     assert.deepEqual(title.attachment.owner, { kind: "workspace" });
   }
 
-  const owner = resolveOperationPlan(
+  const owner = resolveOperationPlan(compiled.plan, fixtureId.project, fixtureId.ownedV1, fixtureId.ownerResolve);
-    compiled.plan,
-    fixtureId.project,
-    fixtureId.ownedV1,
-    fixtureId.ownerResolve,
-  );
   assert.equal(owner?.kind, "edge");
   if (owner?.kind === "edge") {
     assert.equal(owner.binding.edgeTypeId, fixtureId.projectOwner);
@@ -78,12 +84,7 @@ test("the representative v1 workspace compiles to native and package plans", ()
     });
   }
 
-  const summary = resolveOperationPlan(
+  const summary = resolveOperationPlan(compiled.plan, fixtureId.project, fixtureId.summaryV1, fixtureId.summaryGet);
-    compiled.plan,
-    fixtureId.project,
-    fixtureId.summaryV1,
-    fixtureId.summaryGet,
-  );
   assert.equal(summary?.kind, "package");
   if (summary?.kind === "package") {
     assert.equal(summary.packageRevision.revisionId, fixtureId.todoRuntimeV1);
@@ -106,10 +107,7 @@ test("the closure is an exact tree-shaking boundary", () => {
   const closure = computeCapabilityClosure(result.plan, [
     { atomId: fixtureId.project, interfaceRevisionId: fixtureId.summaryV1 },
   ]);
-  assert.deepEqual(closure.conformances, [
+  assert.deepEqual(closure.conformances, [fixtureId.projectNamedConformance, fixtureId.projectSummaryConformance]);
-    fixtureId.projectNamedConformance,
-    fixtureId.projectSummaryConformance,
-  ]);
   assert.deepEqual(closure.packageRevisionIds, [fixtureId.todoRuntimeV1]);
   assert.deepEqual(closure.attachmentIds, [fixtureId.projectTitle]);
   assert.deepEqual(closure.constructorAtomIds, [fixtureId.person]);
@@ -120,18 +118,12 @@ test("compiled plans are snapshots, not mutable authoring state", () => {
   const result = compileWorkspaceRevision(workspace);
   assert.equal(result.ok, true);
   if (!result.ok) return;
-  conformance(workspace, fixtureId.projectNamedConformance)
+  conformance(workspace, fixtureId.projectNamedConformance).operationBindings[0]!.binding = {
-    .operationBindings[0]!.binding = {
+    kind: "state",
-      kind: "state",
+    slotId: fixtureId.personName,
-      slotId: fixtureId.personName,
+    primitive: "read",
-      primitive: "read",
+  };
-    };
+  const resolved = resolveOperationPlan(result.plan, fixtureId.project, fixtureId.namedV1, fixtureId.namedGet);
-  const resolved = resolveOperationPlan(
-    result.plan,
-    fixtureId.project,
-    fixtureId.namedV1,
-    fixtureId.namedGet,
-  );
   assert.equal(resolved?.kind, "state");
   if (resolved?.kind === "state") {
     assert.equal(resolved.binding.slotId, fixtureId.projectTitle);
@@ -144,20 +136,14 @@ test("a conformance binds every operation exactly once", () => {
   expectIssue(missing, "missing-operation-binding");
 
   const duplicate = makeValidCapabilityWorkspace();
-  const bindings = conformance(
+  const bindings = conformance(duplicate, fixtureId.projectNamedConformance).operationBindings;
-    duplicate,
-    fixtureId.projectNamedConformance,
-  ).operationBindings;
   bindings.push(structuredClone(bindings[0]!));
   expectIssue(duplicate, "duplicate-operation-binding");
 });
 
 test("private attachments are visible only to their owning conformance", () => {
   const workspace = makeValidCapabilityWorkspace();
-  const binding = conformance(
+  const binding = conformance(workspace, fixtureId.projectNamedConformance).operationBindings[0]!.binding;
-    workspace,
-    fixtureId.projectNamedConformance,
-  ).operationBindings[0]!.binding;
   assert.equal(binding.kind, "state");
   if (binding.kind !== "state") return;
   binding.slotId = fixtureId.personName;
@@ -166,38 +152,60 @@ test("private attachments are visible only to their owning conformance", () => {
 
 test("related-object dependency views cannot traverse another conformance's private edge", () => {
   const workspace = makeValidCapabilityWorkspace();
-  const packageBinding = conformance(
+  const packageBinding = conformance(workspace, fixtureId.projectSummaryConformance).operationBindings[0]!.binding;
-    workspace,
-    fixtureId.projectSummaryConformance,
-  ).operationBindings[0]!.binding;
   assert.equal(packageBinding.kind, "package");
   if (packageBinding.kind !== "package") return;
-  const named = packageBinding.dependencies.find(
+  const named = packageBinding.dependencies.find((dependency) => dependency.portId === fixtureId.namedPort);
-    (dependency) => dependency.portId === fixtureId.namedPort,
-  );
   assert.ok(named && named.binding.kind === "interface");
   named.binding.via = {
     edgeTypeId: fixtureId.projectOwner,
     projectionId: fixtureId.projectOwnerProjection,
   };
   expectIssue(workspace, "private-attachment-access");
+  const owner = conformance(workspace, fixtureId.projectOwnedConformance);
+  const edge = owner.privateAttachments.find((entry) => entry.kind === "edge" && entry.id === fixtureId.projectOwner);
+  assert.ok(edge?.kind === "edge");
+  edge.endpoints.find((endpoint) => endpoint.projectionId === fixtureId.projectOwnerProjection)!.publicTraversal = true;
+  assert.equal(
+    validateWorkspaceRevision(workspace).some((entry) => entry.code === "private-attachment-access"),
+    false,
+    "Only an explicitly exported read-only traversal crosses ownership",
+  );
+});
+
+test("public traversal permits a native inverse read without exporting mutation authority", () => {
+  const workspace = makeValidCapabilityWorkspace();
+  const owned = conformance(workspace, fixtureId.projectOwnedConformance);
+  const index = owned.privateAttachments.findIndex(
+    (entry) => entry.kind === "edge" && entry.id === fixtureId.projectOwner,
+  );
+  const edge = owned.privateAttachments.splice(index, 1)[0];
+  assert.ok(edge?.kind === "edge");
+  conformance(workspace, fixtureId.projectNamedConformance).privateAttachments.push(edge);
+  expectIssue(workspace, "private-attachment-access");
+  edge.endpoints.find((endpoint) => endpoint.projectionId === fixtureId.projectOwnerProjection)!.publicTraversal = true;
+  const readPath = `conformances[${workspace.conformances.indexOf(owned)}].operationBindings[0]`;
+  assert.equal(
+    validateWorkspaceRevision(workspace).some(
+      (issue) => issue.code === "private-attachment-access" && issue.path.startsWith(readPath),
+    ),
+    false,
+  );
+  const binding = owned.operationBindings[0].binding;
+  assert.ok(binding.kind === "edge");
+  binding.primitive = "connect";
+  expectIssue(workspace, "private-attachment-access");
 });
 
 test("native state and edge providers must match operation shape", () => {
   const stateWorkspace = makeValidCapabilityWorkspace();
-  const state = conformance(
+  const state = conformance(stateWorkspace, fixtureId.projectNamedConformance).operationBindings[0]!.binding;
-    stateWorkspace,
-    fixtureId.projectNamedConformance,
-  ).operationBindings[0]!.binding;
   assert.equal(state.kind, "state");
   if (state.kind === "state") state.primitive = "write";
   expectIssue(stateWorkspace, "invalid-state-binding");
 
   const edgeWorkspace = makeValidCapabilityWorkspace();
-  const edge = conformance(
+  const edge = conformance(edgeWorkspace, fixtureId.projectOwnedConformance).operationBindings[0]!.binding;
-    edgeWorkspace,
-    fixtureId.projectOwnedConformance,
-  ).operationBindings[0]!.binding;
   assert.equal(edge.kind, "edge");
   if (edge.kind === "edge") edge.primitive = "connect";
   expectIssue(edgeWorkspace, "invalid-edge-binding");
@@ -205,18 +213,13 @@ test("native state and edge providers must match operation shape", () => {
 
 test("package dependencies are complete, exact, and explicitly injected", () => {
   const missing = makeValidCapabilityWorkspace();
-  const packageBinding = conformance(
+  const packageBinding = conformance(missing, fixtureId.projectSummaryConformance).operationBindings[0]!.binding;
-    missing,
-    fixtureId.projectSummaryConformance,
-  ).operationBindings[0]!.binding;
   assert.equal(packageBinding.kind, "package");
   if (packageBinding.kind === "package") packageBinding.dependencies.pop();
   expectIssue(missing, "invalid-dependency-binding");
 
   const wrongType = makeValidCapabilityWorkspace();
-  const summaryExport = wrongType.packageImports[0]!.exports.find(
+  const summaryExport = wrongType.packageImports[0]!.exports.find((entry) => entry.id === fixtureId.summaryGetExport);
-    (entry) => entry.id === fixtureId.summaryGetExport,
-  );
   assert.ok(summaryExport);
   summaryExport.dependencyPorts[0]!.requirement = {
     kind: "state",
@@ -228,19 +231,14 @@ test("package dependencies are complete, exact, and explicitly injected", () =>
 
 test("package receiver requirements cannot depend on themselves", () => {
   const workspace = makeValidCapabilityWorkspace();
-  const summaryExport = workspace.packageImports[0]!.exports.find(
+  const summaryExport = workspace.packageImports[0]!.exports.find((entry) => entry.id === fixtureId.summaryGetExport);
-    (entry) => entry.id === fixtureId.summaryGetExport,
-  );
   assert.ok(summaryExport && summaryExport.kind === "operation");
   summaryExport.receiverRequirement = {
     kind: "all-interfaces",
     interfaceRevisionIds: [fixtureId.summaryV1],
   };
   summaryExport.dependencyPorts = [];
-  const packageBinding = conformance(
+  const packageBinding = conformance(workspace, fixtureId.projectSummaryConformance).operationBindings[0]!.binding;
-    workspace,
-    fixtureId.projectSummaryConformance,
-  ).operationBindings[0]!.binding;
   assert.equal(packageBinding.kind, "package");
   if (packageBinding.kind === "package") packageBinding.dependencies = [];
   expectIssue(workspace, "cyclic-conformance-requirement");

test/evolution.test.ts

@@ -0,0 +1,160 @@
+import assert from "node:assert/strict";
+import { test } from "node:test";
+import { capabilityId as id, valueType, validateWorkspaceRevision } from "../src/capability-model/index.js";
+import {
+  contentDigest,
+  planEvolution,
+  runtimeContracts,
+  storageContracts,
+  storageChangeRequiresMigration,
+} from "../src/capability-model/evolution.js";
+import {
+  capabilityFixtureSource,
+  capabilityResourceSources,
+  compileCapabilityFixture,
+  makeValidCapabilityWorkspace,
+} from "./fixtures/capability-model.js";
+
+test("QX carries stable conformance IDs and implementation semantic majors", () => {
+  const result = compileCapabilityFixture({
+    workspace: capabilityFixtureSource.replace(
+      "conform Project as Named {",
+      'conform Project as Named id "conformance:project:named" semantic-major 3 {',
+    ),
+    todo: capabilityResourceSources.todo.replace(
+      'revision "package:todo-runtime@1" {',
+      'revision "package:todo-runtime@1" semantic-major 2 {',
+    ),
+  });
+  assert.ok(result.ok, JSON.stringify(result));
+  assert.equal(result.workspace.conformances[0]!.id, "conformance:project:named");
+  assert.equal(result.workspace.conformances[0]!.semanticMajor, 3);
+  assert.equal(result.workspace.packageImports[0]!.semanticMajor, 2);
+});
+
+test("invalid majors and duplicate owner identities are rejected", () => {
+  const workspace = makeValidCapabilityWorkspace();
+  workspace.packageImports[0]!.semanticMajor = 0;
+  workspace.conformances[0]!.semanticMajor = 1.5;
+  workspace.conformances[0]!.id = id.conformance("same");
+  workspace.conformances[1]!.id = id.conformance("same");
+  const issues = validateWorkspaceRevision(workspace);
+  assert.equal(issues.filter((entry) => entry.code === "invalid-semantic-major").length, 2);
+  assert.ok(issues.some((entry) => entry.code === "duplicate-conformance-id"));
+});
+
+test("hashing is canonical and rejects values outside the persisted JSON contract", () => {
+  assert.equal(contentDigest({ z: 1, a: { y: 3, b: 2 } }), contentDigest({ a: { b: 2, y: 3 }, z: 1 }));
+  assert.notEqual(contentDigest([1, 2]), contentDigest([2, 1]));
+  assert.throws(() => contentDigest(NaN));
+  assert.throws(() => contentDigest(new Date()));
+});
+
+test("a workspace root change and display names do not restart package runtimes", () => {
+  const before = makeValidCapabilityWorkspace();
+  const after = structuredClone(before);
+  after.id = id.workspaceRevision("next");
+  after.sourceRootCommit = "f".repeat(40);
+  after.atoms[0]!.displayName = "Renamed";
+  after.sharedAttachments[0]!.displayName = "Renamed storage";
+  after.conformances.reverse();
+  after.interfaceImports.reverse();
+  const report = planEvolution(before, after, { allowLegacy: true });
+  assert.deepEqual(
+    report.runtimeActions.map((entry) => entry.action),
+    ["keep"],
+  );
+  assert.deepEqual(report.storageChanges, []);
+  assert.deepEqual(report.packageChecks, []);
+});
+
+test("consumer changes preserve unrelated resource owners", () => {
+  const before = makeValidCapabilityWorkspace();
+  before.packageImports.push({
+    packageId: id.package("package:resource-owner"),
+    revisionId: id.packageRevision("package:resource-owner@1"),
+    displayName: "ResourceOwner",
+    source: { repository: "https://example.org/owner.git", commit: "a".repeat(40) },
+    exports: [
+      {
+        kind: "function",
+        id: id.packageExport("export:owner:ping"),
+        displayName: "ping",
+        inputType: valueType.unit,
+        outputType: valueType.unit,
+        dependencyPorts: [],
+      },
+    ],
+  });
+  const after = structuredClone(before);
+  after.packageImports[0]!.source.commit = "e".repeat(40);
+  const actions = planEvolution(before, after, { allowLegacy: true }).runtimeActions;
+  assert.equal(actions.find((entry) => entry.groupId === "package:resource-owner")!.action, "keep");
+  assert.equal(actions.find((entry) => entry.groupId === "package:todo-runtime")!.action, "replace");
+});
+
+test("storage defaults and ownership changes invalidate consumers without requiring a major", () => {
+  const before = makeValidCapabilityWorkspace();
+  const after = structuredClone(before);
+  const slot = after.sharedAttachments[0]!;
+  assert.equal(slot.kind, "state");
+  if (slot.kind === "state") slot.defaultValue = "Different default";
+  const report = planEvolution(before, after, { allowLegacy: true });
+  assert.equal(report.storageChanges.length, 1);
+  assert.deepEqual(report.migrationRequired, []);
+  assert.equal(report.runtimeActions[0]!.action, "replace");
+  assert.deepEqual(report.reviews, []);
+  assert.notDeepEqual(storageContracts(before), storageContracts(after));
+});
+
+test("semantic review receipts cover exact consumer/provider contracts", () => {
+  const before = makeValidCapabilityWorkspace();
+  before.conformances[0]!.id = id.conformance("conformance:project:named");
+  const after = structuredClone(before);
+  after.conformances[0]!.semanticMajor = 2;
+  const report = planEvolution(before, after, { allowLegacy: true });
+  assert.equal(report.reviews.length, 1);
+  assert.equal(report.reviews[0]!.accepted, false);
+  const receipt = {
+    requirementDigest: report.reviews[0]!.requirementDigest,
+    decision: "accepted-unchanged" as const,
+    rationale: "Reviewed the semantic change against summary behavior",
+    agentId: "workspace-agent",
+  };
+  assert.equal(planEvolution(before, after, { allowLegacy: true, reviews: [receipt] }).reviews[0]!.accepted, true);
+  after.packageImports[0]!.source.commit = "f".repeat(40);
+  assert.equal(planEvolution(before, after, { allowLegacy: true, reviews: [receipt] }).reviews[0]!.accepted, false);
+});
+
+test("evolution enrollment is explicit and never erases legacy ownership", () => {
+  const workspace = makeValidCapabilityWorkspace();
+  const report = planEvolution(workspace, workspace);
+  assert.ok(report.blockers.some((entry) => entry.includes("workspace-shared")));
+  assert.ok(report.blockers.some((entry) => entry.includes("authored ID")));
+  assert.equal(runtimeContracts(workspace).length, 1);
+  assert.throws(
+    () => planEvolution(workspace, { ...workspace, workspaceId: id.workspace("other") }),
+    /different workspace/,
+  );
+});
+
+test("automatic preservation distinguishes additions and defaults from incompatible storage", () => {
+  const workspace = makeValidCapabilityWorkspace();
+  const before = storageContracts(workspace).find((entry) => entry.kind === "state")!;
+  const next = structuredClone(before);
+  const value = next.definition as Record<string, unknown>;
+  value.defaultValue = { displayName: "important user data" };
+  assert.equal(storageChangeRequiresMigration(before, next, new Set()), false);
+  next.ownerId = "another-owner";
+  assert.equal(storageChangeRequiresMigration(before, next, new Set()), true);
+  assert.equal(storageChangeRequiresMigration(before, undefined, new Set()), true);
+  delete value.defaultValue;
+  assert.equal(storageChangeRequiresMigration(undefined, next, new Set([value.attachedTo as string])), true);
+  assert.equal(storageChangeRequiresMigration(undefined, next, new Set()), false);
+  const slot = workspace.sharedAttachments.find((entry) => entry.kind === "state")!;
+  if (slot.kind !== "state") throw new Error("fixture slot");
+  slot.defaultValue = { displayName: "one" };
+  const first = storageContracts(workspace);
+  slot.defaultValue = { displayName: "two" };
+  assert.notDeepEqual(storageContracts(workspace), first, "user data must not be stripped as schema metadata");
+});

test/file-lock.test.ts

@@ -0,0 +1,44 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import { mkdtemp, rm } from "node:fs/promises";
+import path from "node:path";
+import os from "node:os";
+import { spawn } from "node:child_process";
+import { once } from "node:events";
+import { withFileLock } from "../src/capability-language/file-lock.js";
+
+test("authoring lock excludes concurrent mutations and survives owner death", async (context) => {
+  const root = await mkdtemp(path.join(os.tmpdir(), "qx-lock-test-"));
+  context.after(() => rm(root, { recursive: true, force: true }));
+  const filename = path.join(root, "lock");
+  const events: string[] = [];
+  let queued: Promise<void>;
+  await withFileLock(filename, async () => {
+    queued = withFileLock(filename, async () => {
+      events.push("second");
+    });
+    events.push("first");
+  });
+  await queued!;
+  assert.deepEqual(events, ["first", "second"]);
+  const module = new URL("../src/capability-language/file-lock.js", import.meta.url).href;
+  const owner = spawn(
+    process.execPath,
+    [
+      "--input-type=module",
+      "-e",
+      `import {withFileLock} from ${JSON.stringify(module)}; await withFileLock(${JSON.stringify(filename)}, async () => {process.stdout.write('ready'); await new Promise(() => {});});`,
+    ],
+    { stdio: ["ignore", "pipe", "pipe"] },
+  );
+  context.after(() => owner.kill("SIGKILL"));
+  await once(owner.stdout, "data");
+  const exited = once(owner, "exit");
+  owner.kill("SIGKILL");
+  await exited;
+  let acquired = false;
+  await withFileLock(filename, async () => {
+    acquired = true;
+  });
+  assert.equal(acquired, true);
+});

test/fixtures/capability-model.ts

@@ -1,18 +1,12 @@
 import { readFileSync } from "node:fs";
 import { resolve } from "node:path";
-import {
+import { capabilityId, type WorkspaceRevision } from "../../src/capability-model/index.js";
-  capabilityId,
-  type WorkspaceRevision,
-} from "../../src/capability-model/index.js";
 import {
   compileCapabilityResourceSource,
   compileCapabilitySource,
   type CapabilityImportEnvironment,
 } from "../../src/capability-language/index.js";
-import type {
+import type { InterfaceRevision, PackageRevision } from "../../src/capability-model/index.js";
-  InterfaceRevision,
-  PackageRevision,
-} from "../../src/capability-model/index.js";
 
 export const fixtureId = {
   workspace: capabilityId.workspace("workspace:todo"),
@@ -29,9 +23,7 @@ export const fixtureId = {
   projectTitle: capabilityId.slot("slot:project:title"),
   personName: capabilityId.slot("slot:person:name"),
   projectOwner: capabilityId.edgeType("edge:project:owner"),
-  projectOwnerProjection: capabilityId.edgeProjection(
+  projectOwnerProjection: capabilityId.edgeProjection("projection:project-owner:owner"),
-    "projection:project-owner:owner",
-  ),
   projectNamedConformance: {
     atomId: capabilityId.atom("atom:project"),
     interfaceRevisionId: capabilityId.interfaceRevision("interface:named@1"),
@@ -49,31 +41,18 @@ export const fixtureId = {
     interfaceRevisionId: capabilityId.interfaceRevision("interface:summary@1"),
   },
   todoRuntimeV1: capabilityId.packageRevision("package:todo-runtime@1"),
-  summaryGetExport: capabilityId.packageExport(
+  summaryGetExport: capabilityId.packageExport("export:todo-runtime:summary-get"),
-    "export:todo-runtime:summary-get",
+  createPersonExport: capabilityId.packageExport("export:todo-runtime:create-person"),
-  ),
-  createPersonExport: capabilityId.packageExport(
-    "export:todo-runtime:create-person",
-  ),
   titlePort: capabilityId.dependencyPort("port:summary:title"),
   namedPort: capabilityId.dependencyPort("port:summary:named"),
   personPort: capabilityId.dependencyPort("port:summary:person"),
 } as const;
 
-export const capabilityFixturePath = resolve(
+export const capabilityFixturePath = resolve(process.cwd(), "test/fixtures/todo.capabilities.qx");
-  process.cwd(),
-  "test/fixtures/todo.capabilities.qx",
-);
 
-export const capabilityFixtureSource = readFileSync(
+export const capabilityFixtureSource = readFileSync(capabilityFixturePath, "utf8");
-  capabilityFixturePath,
-  "utf8",
-);
 
-const resourceSource = (name: string) => readFileSync(
+const resourceSource = (name: string) => readFileSync(resolve(process.cwd(), "test/fixtures", name), "utf8");
-  resolve(process.cwd(), "test/fixtures", name),
-  "utf8",
-);
 
 export const capabilityResourceSources = {
   named: resourceSource("named.interface.qx"),
@@ -85,110 +64,74 @@ export const capabilityResourceSources = {
 const source = (repository: string, commit: string) => ({ repository, commit });
 
 const interfaceRevision = (
-  resource: { kind: "interface"; revision: InterfaceRevision } |
+  resource: { kind: "interface"; revision: InterfaceRevision } | { kind: "package"; revision: PackageRevision },
-    { kind: "package"; revision: PackageRevision },
 ) => {
   if (resource.kind !== "interface") throw new Error("Expected interface fixture");
   return resource.revision;
 };
 
 const packageRevision = (
-  resource: { kind: "interface"; revision: InterfaceRevision } |
+  resource: { kind: "interface"; revision: InterfaceRevision } | { kind: "package"; revision: PackageRevision },
-    { kind: "package"; revision: PackageRevision },
 ) => {
   if (resource.kind !== "package") throw new Error("Expected package fixture");
   return resource.revision;
 };
 
-export const compileCapabilityFixture = (overrides: Partial<{
+export const compileCapabilityFixture = (
-  workspace: string;
+  overrides: Partial<{
-  named: string;
+    workspace: string;
-  owned: string;
+    named: string;
-  summary: string;
+    owned: string;
-  todo: string;
+    summary: string;
-}> = {}) => {
+    todo: string;
-  const named = compileCapabilityResourceSource(
+  }> = {},
-    overrides.named ?? capabilityResourceSources.named,
+) => {
-    {
+  const named = compileCapabilityResourceSource(overrides.named ?? capabilityResourceSources.named, {
-      source: source(
+    source: source("https://repos.quixos.org/quixos-todo/interface-named.git", "2".repeat(40)),
-        "https://repos.quixos.org/quixos-todo/interface-named.git",
+    fileName: "named.interface.qx",
-        "2".repeat(40),
+  });
-      ),
-      fileName: "named.interface.qx",
-    },
-  );
   if (!named.ok) return named;
   const namedRevision = interfaceRevision(named.resource);
   const namedEnvironment: CapabilityImportEnvironment = {
     interfaces: new Map([["Named", namedRevision]]),
     interfaceClosure: [namedRevision],
   };
-  const owned = compileCapabilityResourceSource(
+  const owned = compileCapabilityResourceSource(overrides.owned ?? capabilityResourceSources.owned, {
-    overrides.owned ?? capabilityResourceSources.owned,
+    source: source("https://repos.quixos.org/quixos-todo/interface-owned.git", "3".repeat(40)),
-    {
+    fileName: "owned.interface.qx",
-      source: source(
+    environment: namedEnvironment,
-        "https://repos.quixos.org/quixos-todo/interface-owned.git",
+  });
-        "3".repeat(40),
-      ),
-      fileName: "owned.interface.qx",
-      environment: namedEnvironment,
-    },
-  );
   if (!owned.ok) return owned;
   const ownedRevision = interfaceRevision(owned.resource);
-  const summary = compileCapabilityResourceSource(
+  const summary = compileCapabilityResourceSource(overrides.summary ?? capabilityResourceSources.summary, {
-    overrides.summary ?? capabilityResourceSources.summary,
+    source: source("https://repos.quixos.org/quixos-todo/interface-summary.git", "4".repeat(40)),
-    {
+    fileName: "summary.interface.qx",
-      source: source(
+  });
-        "https://repos.quixos.org/quixos-todo/interface-summary.git",
-        "4".repeat(40),
-      ),
-      fileName: "summary.interface.qx",
-    },
-  );
   if (!summary.ok) return summary;
   const summaryRevision = interfaceRevision(summary.resource);
-  const todo = compileCapabilityResourceSource(
+  const todo = compileCapabilityResourceSource(overrides.todo ?? capabilityResourceSources.todo, {
-    overrides.todo ?? capabilityResourceSources.todo,
+    source: source("https://repos.quixos.org/quixos-todo/package-todo-runtime.git", "5".repeat(40)),
-    {
+    fileName: "todo.package.qx",
-      source: source(
+    environment: namedEnvironment,
-        "https://repos.quixos.org/quixos-todo/package-todo-runtime.git",
+  });
-        "5".repeat(40),
-      ),
-      fileName: "todo.package.qx",
-      environment: namedEnvironment,
-    },
-  );
   if (!todo.ok) return todo;
   const todoRevision = packageRevision(todo.resource);
-  return compileCapabilitySource(
+  return compileCapabilitySource(overrides.workspace ?? capabilityFixtureSource, capabilityFixturePath, {
-    overrides.workspace ?? capabilityFixtureSource,
+    interfaces: new Map([
-    capabilityFixturePath,
+      ["Named", namedRevision],
-    {
+      ["Owned", ownedRevision],
-      interfaces: new Map([
+      ["Summary", summaryRevision],
-        ["Named", namedRevision],
+    ]),
-        ["Owned", ownedRevision],
+    packages: new Map([["TodoRuntime", todoRevision]]),
-        ["Summary", summaryRevision],
+    interfaceClosure: [namedRevision, ownedRevision, summaryRevision],
-      ]),
+    packageClosure: [todoRevision],
-      packages: new Map([["TodoRuntime", todoRevision]]),
+  });
-      interfaceClosure: [
-        namedRevision,
-        ownedRevision,
-        summaryRevision,
-      ],
-      packageClosure: [todoRevision],
-    },
-  );
 };
 
 export const makeValidCapabilityWorkspace = (): WorkspaceRevision => {
   const result = compileCapabilityFixture();
   if (!result.ok) {
-    throw new Error(
+    throw new Error(result.diagnostics.map((entry) => `${entry.phase}/${entry.code}: ${entry.message}`).join("\n"));
-      result.diagnostics
-        .map((entry) => `${entry.phase}/${entry.code}: ${entry.message}`)
-        .join("\n"),
-    );
   }
   return structuredClone(result.workspace);
 };

test/fixtures/todo.capabilities.qx

@@ -8,7 +8,7 @@ workspace Todo id "workspace:todo" revision "workspace:todo@1" commit "111111111
   import package TodoRuntime;
 
   shared state ProjectTitle id "slot:project:title" on Project : string
-    policy optimistic-register default "Untitled project";
+  policy optimistic-register default "Untitled project";
 
   conform Project as Named {
     bind name.get to state ProjectTitle.read;
@@ -19,7 +19,7 @@ workspace Todo id "workspace:todo" revision "workspace:todo@1" commit "111111111
 
   conform Person as Named {
     private state PersonName id "slot:person:name" on Person : string
-      policy optimistic-register default "Anonymous";
+    policy optimistic-register default "Anonymous";
     bind name.get to state PersonName.read;
     bind name.set to state PersonName.write;
     bind name.watch-start to state PersonName.watch-start;

test/fixtures/todo.package.qx

@@ -3,10 +3,10 @@ external atom Person id "atom:person";
 
 package TodoRuntime id "package:todo-runtime" revision "package:todo-runtime@1" {
   operation summaryGet id "export:todo-runtime:summary-get" : unit -> string
-    mode call receiver interfaces [Named] requires {
+  mode call receiver interfaces [Named] requires {
-      state title id "port:summary:title" : string [read];
+    state title id "port:summary:title" : string [read];
-      interface named id "port:summary:named" : Named;
+    interface named id "port:summary:named" : Named;
-      constructor person id "port:summary:person" : Person;
+    constructor person id "port:summary:person" : Person;
-    };
+  };
   constructor createPerson id "export:todo-runtime:create-person" constructs Person : unit;
 }

test/fixtures/typed-package/package.qx

@@ -0,0 +1,8 @@
+external atom Thing id "atom:example:thing";
+
+package TypedExample id "package:typed-example" revision "package:typed-example@1" {
+  constructor createThing id "export:typed-example:create" constructs Thing : unit;
+  operation payloadGet id "export:typed-example:payload" : unit -> bytes mode call receiver atom Thing requires {
+    state payload id "port:typed-example:payload" : bytes [read];
+  };
+}

test/fixtures/typed-package/quixos.lock

@@ -0,0 +1,6 @@
+quixos-lock version 1 {
+  quixos source {
+    repository "https://example.test/quixos.git";
+    commit "1111111111111111111111111111111111111111";
+  }
+}

test/fixtures/web-studio.capabilities.qx

@@ -8,7 +8,7 @@ workspace WebStudioFixture id "workspace:web-studio-fixture" revision "workspace
   import package ComponentRuntime;
 
   shared state ProjectName id "slot:project:name" on Project : string
-    policy optimistic-register default "Untitled project";
+  policy optimistic-register default "Untitled project";
   shared edge ProjectComponentEdge id "edge:project:component" {
     atom ProjectComponent projection subject id "projection:component:subject" exactly-one;
     atom Project projection component id "projection:project:component" optional-one;

test/generic-packages.test.ts

@@ -0,0 +1,199 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { execFile } from "node:child_process";
+import { promisify } from "node:util";
+import { createRequire } from "node:module";
+import { compileCapabilityResourceSource, compileCapabilitySource } from "../src/capability-language/parser.js";
+import { generateTypeScriptBindings, generatePackageDescriptor } from "../src/bindings/index.js";
+import { genericImplementationType } from "../src/bindings/generics.js";
+import { compileWorkspaceRevision, runtimeContracts } from "../src/capability-model/index.js";
+import { generateAppliedClientContracts } from "../src/bindings/client.js";
+const source = { repository: "https://example.test/generic.git", commit: "a".repeat(40) };
+test("generic port aliases retain their defining scope, including shadowed alias names", () => {
+  const iface = compileCapabilityResourceSource(
+    'type Box<value V> = list<V>; interface Data<value V> id "data" revision "data@1" {value payload id "payload" : Box<V> {get id "payload:get";}}',
+    { source },
+  );
+  assert.ok(iface.ok, JSON.stringify(iface.diagnostics));
+  if (iface.resource.kind !== "interface") throw new Error("expected interface");
+  const pkg = compileCapabilityResourceSource(
+    'import interface Data; type Box<value V> = optional<V>; package P id "p" revision "p@1" {operation fetch<value V> id "data@1" : unit -> list<Box<V>> mode call receiver any requires {interface data id "data" : Data<Box<V>>;};}',
+    { source, environment: { interfaces: new Map([["Data", iface.resource.revision]]) } },
+  );
+  assert.ok(pkg.ok, JSON.stringify(pkg.diagnostics));
+  if (pkg.resource.kind !== "package") throw new Error("expected package");
+  const generated = generateTypeScriptBindings(
+    {
+      format: "quixos-bindings",
+      version: 1,
+      interfaces: [],
+      interfaceTemplates: [iface.resource.revision],
+      packages: [pkg.resource.revision],
+    },
+    pkg.resource.revision.revisionId,
+  );
+  assert.match(generated, /"payload.get":\(\)=>Promise<Array<\(T0 \| null\)>>/);
+});
+const definition = () => {
+  const result = compileCapabilityResourceSource(
+    `package Generic id "generic" revision "generic@1" {
+    operation echo<value T> id "echo" : T -> T mode call receiver any;
+  }`,
+    { source },
+  );
+  assert.ok(result.ok, JSON.stringify(result.diagnostics));
+  if (result.resource.kind !== "package") throw new Error("expected package");
+  return result.resource.revision;
+};
+test("generic package exports specialize per binding without changing immutable source identity", () => {
+  const iface = compileCapabilityResourceSource(
+    `interface Echo<value T> id "echo-interface" revision "echo-interface@1" {
+    operation echo id "echo-member" : T -> T {call id "echo-call";}
+  }`,
+    { source },
+  );
+  assert.ok(iface.ok);
+  if (iface.resource.kind !== "interface") throw new Error("expected interface");
+  const pkg = definition();
+  const result = compileCapabilitySource(
+    `workspace W id "w" revision "w@1" commit "${source.commit}" {
+    import interface Echo; import package Generic; atom Thing id "thing";
+    conform Thing as Echo<string> id "string-echo" {bind echo.call to package Generic.echo<string>;}
+    conform Thing as Echo<list<int64>> id "list-echo" {bind echo.call to package Generic.echo<list<int64>>;}
+  }`,
+    "workspace.qx",
+    { interfaces: new Map([["Echo", iface.resource.revision]]), packages: new Map([["Generic", pkg]]) },
+  );
+  assert.ok(result.ok, JSON.stringify(result.diagnostics));
+  assert.equal(pkg.exports.length, 0, "source definition was not mutated");
+  const closed = result.workspace.packageImports[0];
+  assert.equal(closed.revisionId, pkg.revisionId);
+  assert.equal(closed.exports.length, 2);
+  assert.notEqual(closed.exports[0].id, closed.exports[1].id);
+  const oneApplication = structuredClone(result.workspace);
+  oneApplication.packageImports[0].exports.splice(1);
+  oneApplication.conformances.splice(1);
+  assert.notDeepEqual(
+    runtimeContracts(oneApplication),
+    runtimeContracts(result.workspace),
+    "New specializations invalidate the executable contract even with unchanged package source",
+  );
+  const schema = {
+    format: "quixos-bindings" as const,
+    version: 1 as const,
+    interfaces: result.workspace.interfaceImports,
+    packages: [closed],
+  };
+  const generated = generateTypeScriptBindings(schema, pkg.revisionId);
+  assert.match(generated, /"echo":\s*\(<T0>/);
+  for (const entry of closed.exports) {
+    assert.ok(generated.includes(entry.id));
+    assert.ok(generatePackageDescriptor(schema, pkg.revisionId).includes(entry.id));
+  }
+  const forged = structuredClone(result.workspace);
+  forged.packageImports[0].exports[0].outputType = { kind: "scalar", name: "bool" };
+  const rejected = compileWorkspaceRevision(forged);
+  assert.equal(rejected.ok, false);
+  if (!rejected.ok) assert.ok(rejected.issues.some((issue) => issue.message.includes("Specialized export differs")));
+});
+test("generated universal implementations compile and cannot assume a concrete value type", async () => {
+  const pkg = definition();
+  const signature = genericImplementationType(pkg.genericExports![0], [], () => {
+    throw new Error("unexpected concrete type");
+  });
+  const directory = await fs.mkdtemp(path.join(os.tmpdir(), "qx-generic-ts-"));
+  const require = createRequire(import.meta.url);
+  const compiler = path.join(path.dirname(require.resolve("typescript/package.json")), "bin/tsc");
+  const run = promisify(execFile);
+  const preamble = `type QxObjectRef<T extends string>={readonly identity:T}; type QxContextLifecycle<C>={signal?:AbortSignal}; type Handler=${signature};\n`;
+  try {
+    const file = path.join(directory, "generic.ts");
+    await fs.writeFile(file, preamble + `const handler:Handler=({input})=>input;`);
+    await run(process.execPath, [compiler, "--ignoreConfig", "--noEmit", "--strict", "--target", "es2023", file]);
+    await fs.writeFile(file, preamble + `const handler:Handler=({input})=>"not universally T";`);
+    await assert.rejects(
+      run(process.execPath, [compiler, "--ignoreConfig", "--noEmit", "--strict", "--target", "es2023", file]),
+      (error) => {
+        assert.match(String((error as { stdout: string }).stdout), /not assignable/);
+        return true;
+      },
+    );
+  } finally {
+    await fs.rm(directory, { recursive: true, force: true });
+  }
+});
+
+test("generic Self follows the receiver parameter, never a preceding export", () => {
+  const compile = (declaration: string) =>
+    compileCapabilityResourceSource(`package P id "p" revision "p@1" {${declaration}}`, { source });
+  const valid = compile('operation identity<object T> id "identity" : unit -> ref<Self> mode call receiver object T;');
+  assert.ok(valid.ok, JSON.stringify(valid.diagnostics));
+  if (valid.resource.kind !== "package") throw new Error("expected package");
+  const definition = valid.resource.revision.genericExports![0];
+  assert.deepEqual(definition.outputType, {
+    kind: "object-ref",
+    expectation: { kind: "parameter", parameterId: definition.parameters[0].id },
+  });
+  assert.equal(compile('function identity<value T> id "identity" : T -> ref<Self>;').ok, false);
+  assert.equal(
+    compile('operation events<value T> id "events" : unit -> watch-handle mode watch-start receiver any;').ok,
+    false,
+  );
+});
+
+test("typed presentation and factory consumers preserve distinct closed applications and return targets", async () => {
+  const interfaces = new Map();
+  for (const text of [
+    'interface Presentation<value Props> id "presentation" revision "presentation@1" {operation props id "props" : unit -> Props {call id "props:get";}}',
+    'interface Factory<object Result> id "factory" revision "factory@1" {operation create id "create" : unit -> ref<Result> {call id "create:call";}}',
+  ]) {
+    const result = compileCapabilityResourceSource(text, { source });
+    assert.ok(result.ok, JSON.stringify(result.diagnostics));
+    interfaces.set(result.resource.revision.displayName, result.resource.revision);
+  }
+  const pkg = compileCapabilityResourceSource(
+    `import interface Presentation; import interface Factory;
+    external atom Note id "note"; external atom Notebook id "notebook";
+    package Views id "views" revision "views@1" {
+      operation note id "note-view" : unit -> unit mode call receiver any requires {interface props id "props" : Presentation<record {title:string; note:atom-ref<Note>;}>;};
+      operation notebook id "notebook-view" : unit -> unit mode call receiver any requires {interface props id "props" : Presentation<record {count:int32;}>;};
+      operation factory id "factory-view" : unit -> unit mode call receiver any requires {interface factory id "factory" : Factory<atom Note>;};
+    }`,
+    { source, environment: { interfaces } },
+  );
+  assert.ok(pkg.ok, JSON.stringify(pkg.diagnostics));
+  const closed = pkg.resource.specializations!;
+  const presentation = closed.find(
+    (contract) =>
+      contract.application?.definitionId === "presentation@1" && JSON.stringify(contract).includes('"title"'),
+  )!;
+  const factory = closed.find((contract) => contract.application?.definitionId === "factory@1")!;
+  const contracts = generateAppliedClientContracts(closed);
+  const directory = await fs.mkdtemp(path.join(os.tmpdir(), "qx-presentation-types-"));
+  const compiler = path.join(
+    path.dirname(createRequire(import.meta.url).resolve("typescript/package.json")),
+    "bin/tsc",
+  );
+  const run = promisify(execFile);
+  const usage = `type Props=CapabilityOutput<${JSON.stringify(presentation.revisionId)},"props:get">;
+    type Created=CapabilityOutput<${JSON.stringify(factory.revisionId)},"create:call">;
+    const render=({camino,render}:{camino:Props;render:{onSelect:(note:Created)=>void;compact:boolean}})=>{render.onSelect(camino.note);return camino.title;};\n`;
+  try {
+    const file = path.join(directory, "consumer.ts");
+    await fs.writeFile(file, contracts + usage);
+    await run(process.execPath, [compiler, "--ignoreConfig", "--noEmit", "--strict", "--target", "es2023", file]);
+    await fs.writeFile(file, contracts + usage + "const wrong=(props:Props)=>props.count;");
+    await assert.rejects(
+      run(process.execPath, [compiler, "--ignoreConfig", "--noEmit", "--strict", "--target", "es2023", file]),
+      (error) => {
+        assert.match(String((error as { stdout: string }).stdout), /count.*does not exist/);
+        return true;
+      },
+    );
+  } finally {
+    await fs.rm(directory, { recursive: true, force: true });
+  }
+});

test/generics.test.ts

@@ -0,0 +1,601 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import { compileCapabilityResourceSource, compileCapabilitySource } from "../src/capability-language/parser.js";
+import { generateTypeScriptBindings } from "../src/bindings/index.js";
+import { generateClientContracts } from "../src/bindings/client.js";
+import {
+  TypeSubstitution,
+  appliedInterfaceId,
+  bindTypeParameters,
+  canonicalTypeArgument,
+  instantiateInterface,
+  capabilityId,
+  isStorableType,
+  valueType,
+  computeCapabilityClosure,
+  compileWorkspaceRevision,
+  type ClosedTypeArgument,
+  type GenericTypeEnvironment,
+  type ValueTypeExpression,
+} from "../src/capability-model/index.js";
+
+test("unused generic definitions prove symbolic bounds and storable aliases", () => {
+  const source = { repository: "https://example.test/bounds.git", commit: "a".repeat(40) };
+  const interfaces = new Map();
+  for (const text of [
+    'interface Named id "named" revision "named@1" {}',
+    'import interface Named; interface Detailed id "detailed" revision "detailed@1" requires Named {}',
+    'import interface Named; interface Requires<object T implements Named> id "requires" revision "requires@1" {}',
+    'interface Stored<value V : storable> id "stored" revision "stored@1" {}',
+  ]) {
+    const result = compileCapabilityResourceSource(text, { source, environment: { interfaces } });
+    assert.ok(result.ok, JSON.stringify(result.diagnostics));
+    assert.equal(result.resource.kind, "interface");
+    interfaces.set(result.resource.revision.displayName, result.resource.revision);
+  }
+  const compile = (body: string) => compileCapabilityResourceSource(body, { source, environment: { interfaces } });
+  const bad = compile(
+    'import interface Requires; interface Bad<object T> id "bad" revision "bad@1" requires Requires<T> {}',
+  );
+  assert.equal(bad.ok, false);
+  assert.match(JSON.stringify(bad.diagnostics), /does not prove/);
+  const good = compile(
+    'import interface Detailed; import interface Requires; interface Good<object T implements Detailed> id "good" revision "good@1" requires Requires<T> {}',
+  );
+  assert.ok(good.ok, JSON.stringify(good.diagnostics));
+  const alias = compile(
+    'import interface Stored; type Values<value V : storable> = list<optional<V>>; interface Good<value T : storable> id "good" revision "good@1" requires Stored<Values<T>> {}',
+  );
+  assert.ok(alias.ok, JSON.stringify(alias.diagnostics));
+  const nonstorable = compile(
+    'import interface Stored; interface Bad<value T> id "bad" revision "bad@1" requires Stored<T> {}',
+  );
+  assert.equal(nonstorable.ok, false);
+});
+
+const note = capabilityId.atom("atom:note");
+test("Self remains contextual through local aliases", () => {
+  const result = compileCapabilityResourceSource(
+    'type Me = ref<Self>; type Mine = optional<Me>; interface Identity id "identity" revision "identity@1" {value mine id "mine" : Mine {get id "mine:get";}}',
+    { source: { repository: "https://example.test/self.git", commit: "a".repeat(40) } },
+  );
+  assert.ok(result.ok, JSON.stringify(result.diagnostics));
+  if (result.resource.kind !== "interface") throw new Error("expected interface");
+  assert.equal(result.resource.revision.template?.usesSelf, true);
+  const closed = instantiateInterface(result.resource.revision, [], { ...environment(), self: note });
+  assert.deepEqual(closed.members[0].operations[0].outputType, valueType.optional(valueType.atomRef(note)));
+});
+const named = capabilityId.interfaceRevision("interface:named@1");
+const environment = (arguments_: [string, ClosedTypeArgument][] = []): GenericTypeEnvironment => ({
+  arguments: new Map(arguments_),
+  applyInterface: (id, args) => {
+    assert.equal(args.length, 0);
+    return id;
+  },
+  implementsInterface: (target, required) => target.kind === "atom" && target.atomId === note && required === named,
+});
+
+test("substitution reaches nested records, lists, optionals and object references", () => {
+  const substitute = new TypeSubstitution(
+    environment([
+      ["scope/value", { kind: "value", type: valueType.int64 }],
+      ["scope/object", { kind: "object", target: { kind: "atom", atomId: note } }],
+    ]),
+  );
+  const result = substitute.value({
+    kind: "record",
+    fields: {
+      values: { kind: "list", value: { kind: "optional", value: { kind: "parameter", parameterId: "scope/value" } } },
+      target: { kind: "object-ref", expectation: { kind: "parameter", parameterId: "scope/object" } },
+    },
+  });
+  assert.deepEqual(result, {
+    kind: "record",
+    fields: {
+      values: valueType.list(valueType.optional(valueType.int64)),
+      target: valueType.atomRef(note),
+    },
+  });
+  assert.equal(isStorableType(result), false);
+});
+
+test("Self is the exact implementing atom and cannot be unbound", () => {
+  const expression = { kind: "object-ref", expectation: { kind: "self" } } as const;
+  assert.throws(() => new TypeSubstitution(environment()).value(expression), /Self requires an implementing atom/);
+  assert.deepEqual(new TypeSubstitution({ ...environment(), self: note }).value(expression), valueType.atomRef(note));
+});
+
+test("parameter kinds and missing parameters fail closed", () => {
+  const substitute = new TypeSubstitution(
+    environment([["T", { kind: "object", target: { kind: "atom", atomId: note } }]]),
+  );
+  assert.throws(() => substitute.value({ kind: "parameter", parameterId: "T" }), /use ref<T>/);
+  assert.throws(() => substitute.value({ kind: "parameter", parameterId: "unknown" }), /Unbound parameter/);
+  assert.throws(
+    () => bindTypeParameters([{ id: "T", name: "T", kind: "value" }], [], environment()),
+    /Expected 1 type arguments/,
+  );
+  assert.throws(
+    () =>
+      bindTypeParameters(
+        [{ id: "T", name: "T", kind: "value" }],
+        [{ kind: "object", target: { kind: "atom", atomId: note } }],
+        environment(),
+      ),
+    /Expected value, received object/,
+  );
+});
+
+test("bounds require evidence and storable constraints inspect nested values", () => {
+  const parameters = [
+    { id: "T", name: "T", kind: "object", implements: [{ definitionId: named, arguments: [] }] },
+  ] as const;
+  const mutableParameters = parameters.map((p) => ({
+    ...p,
+    implements: p.implements.map((b) => ({ ...b, arguments: [] })),
+  }));
+  assert.equal(
+    bindTypeParameters(mutableParameters, [{ kind: "object", target: { kind: "atom", atomId: note } }], environment())
+      .size,
+    1,
+  );
+  assert.throws(
+    () =>
+      bindTypeParameters(
+        mutableParameters,
+        [{ kind: "object", target: { kind: "atom", atomId: capabilityId.atom("person") } }],
+        environment(),
+      ),
+    /does not implement/,
+  );
+  assert.throws(
+    () =>
+      bindTypeParameters(
+        [{ kind: "value", id: "V", name: "V", storable: true }],
+        [{ kind: "value", type: valueType.list(valueType.optional(valueType.atomRef(note))) }],
+        environment(),
+      ),
+    /cannot contain managed references/,
+  );
+  assert.equal(isStorableType(valueType.message("opaque")), false);
+  assert.equal(isStorableType(valueType.watchHandle), false);
+  assert.equal(
+    isStorableType(valueType.message("checked"), (id) => id === "checked"),
+    true,
+  );
+});
+
+test("closed applications canonicalize records without erasing nominal identity or provenance", () => {
+  const a: ClosedTypeArgument = {
+    kind: "value",
+    type: { kind: "record", fields: { b: valueType.int64, a: valueType.string } },
+  };
+  const b: ClosedTypeArgument = {
+    kind: "value",
+    type: { kind: "record", fields: { a: valueType.string, b: valueType.int64 } },
+  };
+  assert.equal(canonicalTypeArgument(a), canonicalTypeArgument(b));
+  const application = {
+    definitionId: named,
+    source: { repository: "https://example.test/named.git", commit: "a".repeat(40) },
+    arguments: [a],
+  };
+  assert.equal(appliedInterfaceId(application), appliedInterfaceId({ ...application, arguments: [b] }));
+  assert.notEqual(appliedInterfaceId(application), appliedInterfaceId({ ...application, self: note }));
+  assert.notEqual(
+    appliedInterfaceId(application),
+    appliedInterfaceId({ ...application, source: { ...application.source, commit: "b".repeat(40) } }),
+  );
+  assert.throws(
+    () =>
+      canonicalTypeArgument({
+        kind: "value",
+        type: { kind: "parameter", parameterId: "T" },
+      } as unknown as ClosedTypeArgument),
+    /Expected a closed value type/,
+  );
+});
+
+test("aliases use lexical parameter identities, preserve outer bindings and reject cycles", () => {
+  const env = environment([["outer/T", { kind: "value", type: valueType.string }]]);
+  env.aliases = new Map([
+    [
+      "Box",
+      {
+        id: "Box",
+        parameters: [{ id: "box/T", name: "T", kind: "value" }],
+        body: { kind: "list", value: { kind: "parameter", parameterId: "box/T" } },
+      },
+    ],
+    ["Loop", { id: "Loop", parameters: [], body: { kind: "alias", definitionId: "Loop", arguments: [] } }],
+  ]);
+  const substitute = new TypeSubstitution(env);
+  assert.deepEqual(
+    substitute.value({
+      kind: "alias",
+      definitionId: "Box",
+      arguments: [{ kind: "value", type: { kind: "parameter", parameterId: "outer/T" } }],
+    }),
+    valueType.list(valueType.string),
+  );
+  assert.deepEqual(substitute.value({ kind: "parameter", parameterId: "outer/T" }), valueType.string);
+  assert.throws(() => substitute.value({ kind: "alias", definitionId: "Loop", arguments: [] }), /Loop -> Loop/);
+});
+
+test("excessively deep types produce a bounded diagnostic", () => {
+  let expression: ValueTypeExpression = valueType.string;
+  for (let index = 0; index < 200; index++) expression = { kind: "list", value: expression };
+  assert.throws(() => new TypeSubstitution(environment()).value(expression), /depth or expansion budget/);
+});
+
+const source = { repository: "https://example.test/contracts.git", commit: "a".repeat(40) };
+const reader = () => {
+  const result = compileCapabilityResourceSource(
+    `interface Reader<value V> id "reader" revision "reader@1" {
+    value values id "values" : list<optional<V>> { get id "values:get"; watch start id "values:watch" stop id "values:stop"; }
+  }`,
+    { source },
+  );
+  assert.ok(result.ok, JSON.stringify(result.diagnostics));
+  assert.equal(result.resource.kind, "interface");
+  if (result.resource.kind !== "interface") throw new Error("expected interface");
+  return result.resource.revision;
+};
+
+test("generic interface source retains its template and produces closed package/codegen contracts", () => {
+  const definition = reader();
+  assert.equal(definition.template?.parameters[0].name, "V");
+  const result = compileCapabilityResourceSource(
+    `import interface Reader;
+    package Client id "client" revision "client@1" {
+      function run id "run" : unit -> list<optional<string>> requires { interface reader id "reader-port" : Reader<string>; };
+    }`,
+    { source, environment: { interfaces: new Map([["Reader", definition]]) } },
+  );
+  assert.ok(result.ok, JSON.stringify(result.diagnostics));
+  if (result.resource.kind !== "package") throw new Error("expected package");
+  assert.equal(result.resource.specializations?.length, 1);
+  const closed = result.resource.specializations![0];
+  assert.deepEqual(closed.members[0].operations[0].outputType, valueType.list(valueType.optional(valueType.string)));
+  assert.deepEqual(closed.members[0].operations[1].eventType, closed.members[0].operations[0].outputType);
+  const generated = generateTypeScriptBindings(
+    { format: "quixos-bindings", version: 1, interfaces: [closed], packages: [result.resource.revision] },
+    "client@1",
+  );
+  assert.match(generated, /Array<\(string \| null\)>/);
+  assert.ok(generated.includes(closed.revisionId));
+});
+
+test("generic conformances bind state against specialized signatures", () => {
+  const result = compileCapabilitySource(
+    `workspace Demo id "ws" revision "ws@1" commit "${source.commit}" {
+    atom Document id "document";
+    import interface Reader;
+    conform Document as Reader<string> id "reader-conformance" {
+      private state Values id "values-slot" on Document : list<optional<string>> policy optimistic-register;
+      bind values.get to state Values.read;
+      bind values.watch-start to state Values.watch-start;
+      bind values.watch-stop to state Values.watch-stop;
+    }
+  }`,
+    "workspace.qx",
+    { interfaces: new Map([["Reader", reader()]]) },
+  );
+  assert.ok(result.ok, JSON.stringify(result.diagnostics));
+  assert.equal(result.workspace.interfaceImports.length, 1);
+  assert.equal(result.workspace.interfaceImports[0].template, undefined);
+  assert.equal(result.workspace.conformances[0].interfaceRevisionId, result.workspace.interfaceImports[0].revisionId);
+});
+
+test("source rejects wrong generic arity and an unapplied interface", () => {
+  for (const input of [
+    "interface-ref<Reader>",
+    "interface-ref<Reader<string, int32>>",
+    "interface-ref<Reader<atom Note>>",
+  ]) {
+    const result = compileCapabilityResourceSource(
+      `import interface Reader; external atom Note id "note";
+      package P id "p" revision "p@1" { function f id "f" : ${input} -> unit; }`,
+      { source, environment: { interfaces: new Map([["Reader", reader()]]) } },
+    );
+    assert.equal(result.ok, false, input);
+    assert.match(result.diagnostics[0].code, /type-arity|parameter-kind/);
+  }
+});
+
+test("package receivers and injected dependencies select exact applications", () => {
+  const definition = reader();
+  const summary = compileCapabilityResourceSource(
+    `interface Summary id "summary" revision "summary@1" {
+    value summary id "summary-value" : list<optional<string>> { get id "summary:get"; }
+  }`,
+    { source },
+  );
+  assert.ok(summary.ok);
+  if (summary.resource.kind !== "interface") throw new Error("expected interface");
+  const pkg = compileCapabilityResourceSource(
+    `import interface Reader;
+    package P id "p" revision "p@1" {
+      operation summarize id "summarize" : unit -> list<optional<string>> mode call receiver interfaces [Reader<string>]
+        requires { interface reader id "reader-port" : Reader<string>; };
+    }`,
+    { source, environment: { interfaces: new Map([["Reader", definition]]) } },
+  );
+  assert.ok(pkg.ok, JSON.stringify(pkg.diagnostics));
+  if (pkg.resource.kind !== "package") throw new Error("expected package");
+  const result = compileCapabilitySource(
+    `workspace W id "w" revision "w@1" commit "${source.commit}" {
+    import interface Reader; import interface Summary; import package P;
+    atom Note id "note";
+    conform Note as Reader<string> id "reader-conformance" {
+      private state Values id "values" on Note : list<optional<string>> policy optimistic-register;
+      bind values.get to state Values.read;
+      bind values.watch-start to state Values.watch-start;
+      bind values.watch-stop to state Values.watch-stop;
+    }
+    conform Note as Summary id "summary-conformance" {
+      bind summary.get to package P.summarize with { reader to interface Reader<string>; };
+    }
+  }`,
+    "workspace.qx",
+    {
+      interfaces: new Map([
+        ["Reader", definition],
+        ["Summary", summary.resource.revision],
+      ]),
+      interfaceClosure: pkg.resource.specializations,
+      packages: new Map([["P", pkg.resource.revision]]),
+    },
+  );
+  assert.ok(result.ok, JSON.stringify(result.diagnostics));
+});
+
+test("named generic value aliases elaborate through nested lists", () => {
+  const result = compileCapabilityResourceSource(
+    `type Page<value T> = record { items: list<T>; next: optional<string>; };
+    package P id "p" revision "p@1" { function f id "f" : unit -> Page<int64>; }`,
+    { source },
+  );
+  assert.ok(result.ok, JSON.stringify(result.diagnostics));
+  if (result.resource.kind !== "package") throw new Error("expected package");
+  assert.deepEqual(result.resource.revision.exports[0].outputType, {
+    kind: "record",
+    fields: { items: valueType.list(valueType.int64), next: valueType.optional(valueType.string) },
+  });
+});
+
+test("Self specializes to the implementing atom rather than an erased interface", () => {
+  const definition = compileCapabilityResourceSource(
+    `interface Identity id "identity" revision "identity@1" {
+    operation identity id "identity-member" : ref<Self> -> ref<Self> { call id "identity-call"; }
+  }`,
+    { source },
+  );
+  assert.ok(definition.ok, JSON.stringify(definition.diagnostics));
+  if (definition.resource.kind !== "interface") throw new Error("expected interface");
+  assert.equal(definition.resource.revision.template?.usesSelf, true);
+  const { revision } = definition.resource;
+  const first = instantiateInterface(revision, [], { ...environment(), self: note });
+  const second = instantiateInterface(revision, [], { ...environment(), self: capabilityId.atom("other") });
+  assert.deepEqual(first.members[0].operations[0].outputType, valueType.atomRef(note));
+  assert.notEqual(first.revisionId, second.revisionId);
+});
+
+test("package Self comes from an exact receiver, never a previous export", () => {
+  const valid = compileCapabilityResourceSource(
+    `type Owned<object T> = ref<T>; external atom Note id "note";
+    package P id "p" revision "p@1" {
+      operation identity id "identity" : ref<Self> -> Owned<Self> mode call receiver atom Note;
+    }`,
+    { source },
+  );
+  assert.ok(valid.ok, JSON.stringify(valid.diagnostics));
+  if (valid.resource.kind !== "package") throw new Error("expected package");
+  assert.deepEqual(valid.resource.revision.exports[0].outputType, valueType.atomRef(capabilityId.atom("note")));
+  const invalid = compileCapabilityResourceSource(
+    `external atom Note id "note";
+    package P id "p" revision "p@1" {
+      operation identity id "identity" : ref<Self> -> ref<Self> mode call receiver atom Note;
+      function bad id "bad" : unit -> ref<Self>;
+    }`,
+    { source },
+  );
+  assert.equal(invalid.ok, false);
+  assert.equal(invalid.diagnostics[0].code, "unbound-self");
+});
+
+test("host generation rejects unresolved definitions and operation-only dispatch ambiguity", () => {
+  const definition = reader();
+  assert.throws(() => generateClientContracts([definition], {}), /closed interface/);
+  const first = instantiateInterface(definition, [{ kind: "value", type: valueType.string }], environment());
+  const second = instantiateInterface(definition, [{ kind: "value", type: valueType.int32 }], environment());
+  assert.throws(() => generateClientContracts([first, second], {}), /ambiguous/);
+});
+
+test("finite recursive generic interface references share the same closed application", () => {
+  const definition = compileCapabilityResourceSource(
+    `interface Node<value V> id "node" revision "node@1" {
+    value next id "next" : optional<interface-ref<Node<V>>> { get id "next:get"; }
+  }`,
+    { source },
+  );
+  assert.ok(definition.ok, JSON.stringify(definition.diagnostics));
+  if (definition.resource.kind !== "interface") throw new Error("expected interface");
+  const result = compileCapabilityResourceSource(
+    `import interface Node;
+    package P id "p" revision "p@1" { function f id "f" : interface-ref<Node<string>> -> unit; }
+  `,
+    { source, environment: { interfaces: new Map([["Node", definition.resource.revision]]) } },
+  );
+  assert.ok(result.ok, JSON.stringify(result.diagnostics));
+  const [closed] = result.resource.specializations!;
+  assert.equal(result.resource.specializations!.length, 1);
+  assert.deepEqual(
+    closed.members[0].operations[0].outputType,
+    valueType.optional(valueType.interfaceRef(closed.revisionId)),
+  );
+});
+
+test("expanding recursive generic interfaces fail with a bounded diagnostic", () => {
+  const definition = compileCapabilityResourceSource(
+    `interface Node<value V> id "node" revision "node@1" {
+    value next id "next" : interface-ref<Node<list<V>>> { get id "next:get"; }
+  }`,
+    { source },
+  );
+  assert.ok(definition.ok, JSON.stringify(definition.diagnostics));
+  if (definition.resource.kind !== "interface") throw new Error("expected interface");
+  const result = compileCapabilityResourceSource(
+    `import interface Node;
+    package P id "p" revision "p@1" { function f id "f" : interface-ref<Node<string>> -> unit; }
+  `,
+    { source, environment: { interfaces: new Map([["Node", definition.resource.revision]]) } },
+  );
+  assert.equal(result.ok, false);
+  assert.equal(result.diagnostics[0].code, "recursive-application");
+});
+
+test("storable parameters do not imply support for RPC-only records", () => {
+  assert.equal(isStorableType({ kind: "record", fields: { name: valueType.string } }), false);
+  assert.equal(isStorableType(valueType.list(valueType.optional(valueType.string))), true);
+});
+
+test("generic declarations reject duplicate members before specialization", () => {
+  const result = compileCapabilityResourceSource(
+    `interface Bad<value V> id "bad" revision "bad@1" {
+    value first id "duplicate" : V { get id "first:get"; }
+    value second id "duplicate" : V { get id "second:get"; }
+  }`,
+    { source },
+  );
+  assert.equal(result.ok, false);
+  assert.equal(result.diagnostics[0].code, "duplicate-interface-member");
+});
+
+test("unused templates still check nested application arity and alias cycles", () => {
+  const malformed = compileCapabilityResourceSource(
+    `import interface Reader;
+    interface Bad<value V> id "bad" revision "bad@1" {
+      value item id "item" : interface-ref<Reader<V, V>> { get id "get"; }
+    }`,
+    { source, environment: { interfaces: new Map([["Reader", reader()]]) } },
+  );
+  assert.equal(malformed.ok, false);
+  assert.equal(malformed.diagnostics[0].code, "type-arity");
+  const cycle = compileCapabilityResourceSource(
+    `type Loop<value V> = list<Loop<V>>;
+    interface Bad<value V> id "bad" revision "bad@1" {
+      value item id "item" : Loop<V> { get id "get"; }
+    }`,
+    { source },
+  );
+  assert.equal(cycle.ok, false);
+  assert.equal(cycle.diagnostics[0].code, "recursive-alias");
+});
+
+test("Self in a prerequisite contributes to the outer application identity", () => {
+  const identity = compileCapabilityResourceSource(
+    `interface Identity id "identity" revision "identity@1" {
+    value self id "self" : ref<Self> { get id "self:get"; }
+  }`,
+    { source },
+  );
+  assert.ok(identity.ok);
+  if (identity.resource.kind !== "interface") throw new Error("expected interface");
+  const outer = compileCapabilityResourceSource(
+    `import interface Identity;
+    interface Outer<value V> id "outer" revision "outer@1" requires Identity {}`,
+    { source, environment: { interfaces: new Map([["Identity", identity.resource.revision]]) } },
+  );
+  assert.ok(outer.ok, JSON.stringify(outer.diagnostics));
+  if (outer.resource.kind !== "interface") throw new Error("expected interface");
+  assert.equal(outer.resource.revision.template?.usesSelf, true);
+});
+
+test("object bounds are discharged against the complete candidate, not source order", () => {
+  const namedResult = compileCapabilityResourceSource(`interface Named id "named" revision "named@1" {}`, { source });
+  assert.ok(namedResult.ok);
+  if (namedResult.resource.kind !== "interface") throw new Error("expected interface");
+  const named = namedResult.resource.revision;
+  const bounded = compileCapabilityResourceSource(
+    `import interface Named;
+    interface Container<object T implements Named> id "container" revision "container@1" {}`,
+    { source, environment: { interfaces: new Map([["Named", named]]) } },
+  );
+  assert.ok(bounded.ok, JSON.stringify(bounded.diagnostics));
+  if (bounded.resource.kind !== "interface") throw new Error("expected interface");
+  const container = bounded.resource.revision;
+  const compile = (evidence: string) =>
+    compileCapabilitySource(
+      `workspace W id "w" revision "w@1" commit "${source.commit}" {
+    import interface Named; import interface Container;
+    atom Note id "note"; atom Index id "index";
+    conform Index as Container<atom Note> id "index-container" {}
+    ${evidence}
+  }`,
+      "workspace.qx",
+      {
+        interfaces: new Map([
+          ["Named", named],
+          ["Container", container],
+        ]),
+      },
+    );
+  const missing = compile("");
+  assert.equal(missing.ok, false);
+  assert.ok(missing.diagnostics.some((issue) => issue.code === "unsatisfied-interface"));
+  const valid = compile('conform Note as Named id "note-named" {}');
+  assert.ok(valid.ok, JSON.stringify(valid.diagnostics));
+});
+
+test("prerequisites require explicit conformances and remain in the capability closure", () => {
+  const baseResult = compileCapabilityResourceSource(`interface Base id "base" revision "base@1" {}`, { source });
+  assert.ok(baseResult.ok);
+  if (baseResult.resource.kind !== "interface") throw new Error("expected interface");
+  const base = baseResult.resource.revision;
+  const derivedResult = compileCapabilityResourceSource(
+    `import interface Base;
+    interface Derived<value V> id "derived" revision "derived@1" requires Base {}`,
+    {
+      source,
+      environment: { interfaces: new Map([["Base", base]]) },
+    },
+  );
+  assert.ok(derivedResult.ok, JSON.stringify(derivedResult.diagnostics));
+  if (derivedResult.resource.kind !== "interface") throw new Error("expected interface");
+  const derived = derivedResult.resource.revision;
+  const compile = (evidence: string) =>
+    compileCapabilitySource(
+      `workspace W id "w" revision "w@1" commit "${source.commit}" {
+    import interface Base; import interface Derived; atom Note id "note";
+    conform Note as Derived<string> id "derived-conformance" {}
+    ${evidence}
+  }`,
+      "workspace.qx",
+      {
+        interfaces: new Map([
+          ["Base", base],
+          ["Derived", derived],
+        ]),
+      },
+    );
+  assert.equal(compile("").ok, false);
+  const result = compile('conform Note as Base id "base-conformance" {}');
+  assert.ok(result.ok, JSON.stringify(result.diagnostics));
+  const root = result.workspace.conformances[0];
+  const closure = computeCapabilityClosure(result.plan, [root]);
+  assert.equal(closure.conformances.length, 2);
+  const unresolved = structuredClone(result.workspace);
+  unresolved.interfaceImports[0].members.push({
+    kind: "value",
+    id: capabilityId.member("unresolved"),
+    displayName: "unresolved",
+    operations: [],
+    valueType: { kind: "parameter", parameterId: "T" } as unknown as typeof valueType.string,
+  });
+  assert.equal(compileWorkspaceRevision(unresolved).ok, false);
+  const forged = structuredClone(result.workspace);
+  const applied = forged.interfaceImports.find((entry) => entry.application)!;
+  applied.application!.arguments = [{ kind: "value", type: valueType.int64 }];
+  assert.equal(compileWorkspaceRevision(forged).ok, false);
+});

test/git-resolver.test.ts

@@ -0,0 +1,37 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import { mkdtemp, mkdir, writeFile, rm } from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { execFile as callback } from "node:child_process";
+import { promisify } from "node:util";
+import { createGitCapabilityResolver } from "../src/capability-language/git-resolver.js";
+
+const execFile = promisify(callback);
+test("dependency resolution is reusable across processes, concurrent and rejects modified checkouts", async (context) => {
+  const temporary = await mkdtemp(path.join(os.tmpdir(), "qx-resolver-test-"));
+  context.after(() => rm(temporary, { recursive: true, force: true }));
+  const origin = path.join(temporary, "origin");
+  await mkdir(origin);
+  const git = (...args: string[]) => execFile("git", ["-C", origin, ...args]);
+  await git("init");
+  await writeFile(path.join(origin, "interface.qx"), "contract");
+  await git("add", ".");
+  await git("-c", "user.name=Test", "-c", "user.email=test@example.test", "commit", "-m", "contract");
+  const commit = (await git("rev-parse", "HEAD")).stdout.trim();
+  await git("tag", `quixos-reachability/${commit}`);
+  const source = { resolver: "git" as const, repository: origin, commit };
+  const options = { checkoutRoot: path.join(temporary, "cache") };
+  const a = await createGitCapabilityResolver(options);
+  const b = await createGitCapabilityResolver(options);
+  const [first, second] = await Promise.all([a(source, "interface"), b(source, "interface")]);
+  assert.equal(first.directory, second.directory);
+  const c = await createGitCapabilityResolver(options);
+  assert.equal((await c(source, "interface")).directory, first.directory);
+  await writeFile(path.join(first.directory, "interface.qx"), "changed");
+  const d = await createGitCapabilityResolver(options);
+  await assert.rejects(d(source, "interface"), /modified/);
+  // A failed request is not memoized forever; repair can be observed on retry.
+  await writeFile(path.join(first.directory, "interface.qx"), "contract");
+  assert.equal((await d(source, "interface")).directory, first.directory);
+});

test/migrations.test.ts

@@ -0,0 +1,75 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import {
+  contentDigest,
+  validateMigrationCatalog,
+  selectMigrationPath,
+  type MigrationCatalog,
+} from "../src/capability-model/index.js";
+const before = { fields: ["name"] },
+  after = { fields: ["first", "last"] };
+const from = contentDigest(before),
+  to = contentDigest(after);
+const catalog = (): MigrationCatalog => ({
+  schemaVersion: 1,
+  contracts: { [from]: before, [to]: after },
+  migrations: [
+    {
+      id: "split-name",
+      scopeId: "person-name",
+      from,
+      to,
+      implementation: {
+        exportId: "migrate-name",
+        file: "src/migrate-name.ts",
+        digest: contentDigest("implementation"),
+      },
+      predecessors: [],
+      ports: [
+        { name: "source", view: "old", access: ["read"], contractDigest: from },
+        { name: "target", view: "new", access: ["write"], contractDigest: to },
+      ],
+    },
+  ],
+});
+test("published migrations retain exact old contracts and explicit local bindings", () => {
+  const value = validateMigrationCatalog(catalog(), new Set(["migrate-name"]));
+  const selection = {
+    scopeId: "person-name",
+    from,
+    to,
+    path: ["split-name"],
+    bindings: { source: "old-slot", target: "new-slot" },
+  };
+  const result = selectMigrationPath(value, selection);
+  assert.equal(result[0].alreadyApplied, false);
+  assert.equal(
+    selectMigrationPath(value, selection, new Map([["split-name", result[0].digest]]))[0].alreadyApplied,
+    true,
+  );
+  const changed = catalog();
+  changed.migrations[0].implementation.digest = contentDigest("new code");
+  assert.throws(
+    () => selectMigrationPath(changed, selection, new Map([["split-name", result[0].digest]])),
+    /different code/,
+  );
+  assert.throws(() => selectMigrationPath(value, { ...selection, path: [] }), /does not cover/);
+  assert.throws(() => selectMigrationPath(value, { ...selection, bindings: {} }), /Missing local/);
+});
+test("old migration views cannot be writable and contract hashes are verified", () => {
+  const value = catalog();
+  value.migrations[0].ports[0].access = ["write"];
+  assert.throws(() => validateMigrationCatalog(value), /read-only/);
+  const corrupt = catalog();
+  corrupt.contracts[from] = {};
+  assert.throws(() => validateMigrationCatalog(corrupt), /digest mismatch/);
+});
+
+test("migration history rejects cycles and non-boolean compatibility promises", () => {
+  const cyclic = catalog();
+  cyclic.migrations[0].predecessors = ["split-name"];
+  assert.throws(() => validateMigrationCatalog(cyclic), /Cyclic/);
+  const misleading = catalog();
+  (misleading.migrations[0] as unknown as { preservesOldReaders: string }).preservesOldReaders = "false";
+  assert.throws(() => validateMigrationCatalog(misleading), /must be booleans/);
+});

test/nix-candidate.test.ts

@@ -0,0 +1,75 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { execFile as callback } from "node:child_process";
+import { promisify } from "node:util";
+const execFile = promisify(callback);
+
+test(
+  "Nix checks a retained immutable source without a local overlay and reuses the result",
+  { skip: !process.env.QX_CHECK_GENERATOR },
+  async (context) => {
+    const root = await fs.mkdtemp(path.join(os.tmpdir(), "qx-nix-candidate-test-"));
+    context.after(() => fs.rm(root, { recursive: true, force: true }));
+    const git = (...args: string[]) => execFile("git", ["-C", root, ...args]);
+    await git("init");
+    await fs.writeFile(
+      path.join(root, "interface.qx"),
+      'interface Example id "interface:example" revision "interface:example@1" {}',
+    );
+    await fs.writeFile(
+      path.join(root, "quixos.lock"),
+      `quixos-lock version 1 { quixos source { repository "https://example.test/quixos"; commit "${"a".repeat(40)}"; } }`,
+    );
+    await git("add", ".");
+    await git("-c", "user.name=Test", "-c", "user.email=test@example.test", "commit", "-m", "contract");
+    const commit = (await git("rev-parse", "HEAD")).stdout.trim();
+    await git("tag", `quixos-reachability/${commit}`);
+    const generator = process.env.QX_CHECK_GENERATOR!;
+    const repository = "https://immutable-candidate.example.test/contract.git";
+    const env = {
+      ...process.env,
+      GIT_CONFIG_COUNT: "1",
+      GIT_CONFIG_KEY_0: `url.file://${root}.insteadOf`,
+      GIT_CONFIG_VALUE_0: repository,
+    };
+    const build = async () =>
+      (
+        await execFile(
+          "nix",
+          [
+            "build",
+            "--impure",
+            "--file",
+            path.join(generator, "share/checked-candidate.nix"),
+            "--argstr",
+            "repository",
+            repository,
+            "--argstr",
+            "commit",
+            commit,
+            "--argstr",
+            "kind",
+            "interface",
+            "--argstr",
+            "generator",
+            generator,
+            "--option",
+            "substitute",
+            "false",
+            "--no-link",
+            "--print-out-paths",
+          ],
+          { env, maxBuffer: 4 * 1024 * 1024 },
+        )
+      ).stdout.trim();
+    const output = await build();
+    const candidate = JSON.parse(await fs.readFile(path.join(output, "candidate.json"), "utf8"));
+    assert.equal(candidate.revision.source.commit, commit);
+    await fs.writeFile(path.join(root, "interface.qx"), "broken draft");
+    assert.equal(await build(), output);
+    assert.deepEqual(JSON.parse(await fs.readFile(path.join(output, "checks.json"), "utf8")), []);
+  },
+);

test/pin-upgrades.test.ts

@@ -0,0 +1,181 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { promisify } from "node:util";
+import { execFile as callback } from "node:child_process";
+import { planPinUpgrades, applyPinUpgrades, type UpgradeEffects } from "../src/capability-language/pin-upgrades.js";
+const execFile = promisify(callback);
+
+test(
+  "real jj snapshots and immutable Git publication propagate a changed interface into the root",
+  { skip: !process.env.QX_CHECK_GENERATOR },
+  async (context) => {
+    const workbench = await fs.mkdtemp(path.join(os.tmpdir(), "qx-real-upgrade-"));
+    context.after(() => fs.rm(workbench, { recursive: true, force: true }));
+    // Exercise the actual effects with local bare remotes, without external writes.
+    const environment = {
+      GIT_CONFIG_COUNT: "1",
+      GIT_CONFIG_KEY_0: `url.file://${workbench}/remotes/.insteadOf`,
+      GIT_CONFIG_VALUE_0: "https://upgrade.test/",
+      QUIXOS_JJ_NO_CHECKPOINT: "1",
+      QUIXOS_CHECK_GENERATOR: process.env.QX_CHECK_GENERATOR!,
+    };
+    const previous = Object.fromEntries(Object.keys(environment).map((key) => [key, process.env[key]]));
+    Object.assign(process.env, environment);
+    context.after(() => {
+      for (const [key, value] of Object.entries(previous))
+        if (value === undefined) delete process.env[key];
+        else process.env[key] = value;
+    });
+    const run = async (cwd: string, command: string, args: string[]) =>
+      (await execFile(command, args, { cwd })).stdout.trim();
+    await fs.mkdir(path.join(workbench, "remotes"));
+    const nodes = [];
+    for (const [kind, directory, remote] of [
+      ["interface", "resources/Named", "named.git"],
+      ["workspace", "root", "workspace.git"],
+    ] as const) {
+      const root = path.join(workbench, directory);
+      await fs.mkdir(root, { recursive: true });
+      await run(workbench, "git", ["init", "--bare", path.join(workbench, "remotes", remote)]);
+      await run(root, "jj", ["git", "init", "--colocate"]);
+      await run(root, "git", ["remote", "add", "origin", `https://upgrade.test/${remote}`]);
+      await fs.writeFile(path.join(root, ".gitignore"), ".quixos/\n");
+      const child = nodes[0];
+      await fs.writeFile(
+        path.join(root, "quixos.lock"),
+        `quixos-lock version 1 { quixos source { repository "https://upgrade.test/quixos.git"; commit "${"a".repeat(40)}"; } ${child ? `interface Named source { repository "${child.source.repository}"; commit "${child.source.commit}"; }` : ""} }`,
+      );
+      await fs.writeFile(
+        path.join(root, `${kind}.qx`),
+        kind === "interface"
+          ? 'interface Named id "interface:named" revision "interface:named@1" {}'
+          : `workspace W id "workspace:w" revision "workspace:w@1" commit "${"a".repeat(40)}" { import interface Named; atom A id "atom:a"; }`,
+      );
+      await run(root, "jj", ["describe", "-m", "Initial source"]);
+      const commit = await run(root, "jj", ["log", "--no-graph", "-r", "@", "-T", "commit_id"]);
+      await run(root, "git", ["push", "origin", `${commit}:refs/tags/quixos-reachability/${commit}`]);
+      nodes.push({ kind, directory, source: { repository: `https://upgrade.test/${remote}`, commit } });
+    }
+    await fs.mkdir(path.join(workbench, ".quixos"));
+    await fs.writeFile(path.join(workbench, ".quixos/resource-graph.json"), JSON.stringify({ resources: [nodes[0]] }));
+    await fs.appendFile(path.join(workbench, nodes[0].directory, "interface.qx"), "\n// incremental author edit\n");
+    const plan = await planPinUpgrades(workbench, { nodes, bootstrap: true });
+    const result = await applyPinUpgrades(plan);
+    assert.equal(result.activated, false);
+    const graph = JSON.parse(await fs.readFile(path.join(workbench, ".quixos/resource-graph.json"), "utf8"));
+    const commit = graph.resources[0].source.commit;
+    assert.notEqual(commit, nodes[0].source.commit);
+    assert.match(await fs.readFile(path.join(workbench, "root/quixos.lock"), "utf8"), new RegExp(commit));
+    assert.match(
+      await run(workbench, "git", ["--git-dir", path.join(workbench, "remotes/named.git"), "show-ref"]),
+      new RegExp(commit),
+    );
+  },
+);
+
+test("pin upgrades publish children before parent locks and resume without republishing completed nodes", async (context) => {
+  const workbench = await fs.mkdtemp(path.join(os.tmpdir(), "qx-upgrade-test-"));
+  context.after(() => fs.rm(workbench, { recursive: true, force: true }));
+  const from = "a".repeat(40),
+    to = "b".repeat(40),
+    framework = "c".repeat(40);
+  const sources = [
+    {
+      kind: "workspace" as const,
+      directory: "root",
+      source: { repository: "https://example.test/workspace.git", commit: from },
+    },
+    {
+      kind: "interface" as const,
+      directory: "resources/Named",
+      source: { repository: "https://example.test/named.git", commit: from },
+    },
+  ];
+  const lock = `quixos-lock version 1 { quixos source { repository "https://example.test/quixos.git"; commit "${framework}"; }`;
+  for (const node of sources) {
+    const directory = path.join(workbench, node.directory);
+    await fs.mkdir(directory, { recursive: true });
+    await execFile("git", ["-C", directory, "init"]);
+    await execFile("git", ["-C", directory, "remote", "add", "origin", node.source.repository]);
+    await fs.writeFile(path.join(directory, ".gitignore"), ".quixos/\n");
+    await fs.writeFile(
+      path.join(directory, "quixos.lock"),
+      lock +
+        (node.kind === "workspace"
+          ? ` interface Named source { repository "${sources[1].source.repository}"; commit "${from}"; }`
+          : "") +
+        " }",
+    );
+  }
+  await fs.writeFile(
+    path.join(workbench, "resources/Named/interface.qx"),
+    'interface Named id "interface:named" revision "interface:named@1" { value name id "member:name" : string { get id "op:get"; } }',
+  );
+  await fs.writeFile(
+    path.join(workbench, "root/workspace.qx"),
+    `workspace W id "workspace:w" revision "workspace:w@1" commit "${from}" { import interface Named; atom A id "atom:a"; }`,
+  );
+  const snapshotMap = path.join(workbench, "snapshots.json");
+  await fs.writeFile(
+    snapshotMap,
+    JSON.stringify({
+      resources: [
+        {
+          kind: "interface",
+          repository: sources[1].source.repository,
+          commit: to,
+          directory: path.join(workbench, "resources/Named"),
+        },
+      ],
+    }),
+  );
+  const oldMap = process.env.QUIXOS_SNAPSHOT_MAP;
+  process.env.QUIXOS_SNAPSHOT_MAP = snapshotMap;
+  context.after(() => {
+    if (oldMap === undefined) delete process.env.QUIXOS_SNAPSHOT_MAP;
+    else process.env.QUIXOS_SNAPSHOT_MAP = oldMap;
+  });
+  const plan = await planPinUpgrades(workbench, { nodes: sources });
+  await fs.mkdir(path.join(workbench, ".quixos"), { recursive: true });
+  await fs.writeFile(
+    path.join(workbench, ".quixos/resource-graph.json"),
+    JSON.stringify({ resources: [{ ...sources[1], source: { resolver: "git", ...sources[1].source } }] }),
+  );
+  assert.deepEqual(
+    plan.nodes.map((node) => node.directory),
+    ["resources/Named", "root"],
+  );
+  let fail = true;
+  const published: string[] = [];
+  const effects: UpgradeEffects = {
+    check: async (node) => {
+      if (node.kind === "workspace" && fail) throw new Error("refactor required");
+    },
+    snapshot: async () => to,
+    publish: async (root) => {
+      published.push(path.relative(workbench, root));
+    },
+  };
+  await assert.rejects(() => applyPinUpgrades(plan, undefined, effects), /refactor required/);
+  assert.deepEqual(published, ["resources/Named"]);
+  assert.match(await fs.readFile(path.join(workbench, "root/quixos.lock"), "utf8"), new RegExp(to));
+  const id = (await fs.readdir(path.join(workbench, ".quixos/upgrades")))
+    .find((name) => name.endsWith(".json"))!
+    .slice(0, -5);
+  fail = false;
+  await fs.appendFile(path.join(workbench, "root/workspace.qx"), "\n// explicit refactor\n");
+  await assert.rejects(() => applyPinUpgrades(plan, id, effects), /accept-edits/);
+  const result = await applyPinUpgrades(plan, id, effects, { acceptEdits: true });
+  assert.equal(result.activated, false);
+  assert.deepEqual(published, ["resources/Named", "root"]);
+  const graph = JSON.parse(await fs.readFile(path.join(workbench, ".quixos/resource-graph.json"), "utf8"));
+  assert.equal(graph.resources.length, 1);
+  assert.equal(graph.resources[0].source.commit, to);
+  const next = await planPinUpgrades(workbench, {
+    nodes: [sources[0], { ...sources[1], source: graph.resources[0].source }],
+  });
+  assert.deepEqual(next.nodes.find((node) => node.kind === "workspace")!.dependencies, ["resources/Named"]);
+});

test/qx-source.test.ts

@@ -0,0 +1,121 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import { mkdtemp, writeFile, readFile, rm, symlink } from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import {
+  parseQx,
+  formatQx,
+  lintQx,
+  applySourceEdits,
+  addWorkspaceImport,
+  walkSyntax,
+  resolveQxSources,
+  readQxSource,
+  compileCapabilitySource,
+  scaffoldAtom,
+  compileWorkspaceRepository,
+} from "../src/capability-language/index.js";
+
+const workspace = `workspace Test id "w" revision "w@1" commit "${"1".repeat(40)}" {\n// keep 🐈 comment\n}\n`;
+test("lint reports invalid and redundant imports without resolving repositories", () => {
+  const source = workspace.replace("}\n", 'import "a.qx"; import "a.qx"; import "../bad.qx";\n}\n');
+  assert.deepEqual(
+    lintQx(source).map((entry) => [entry.code, entry.severity]),
+    [
+      ["duplicate-source-import", "warning"],
+      ["invalid-source-import", "error"],
+    ],
+  );
+});
+test("lossless tokens, UTF-16 ranges, and safe source edits", () => {
+  const text = workspace.replace("}\n", 'atom Cat id "🐈";\n}\n');
+  const parsed = parseQx(text);
+  assert.deepEqual(parsed.diagnostics, []);
+  assert.equal(parsed.tokens.map((token) => token.text).join(""), text);
+  const atom = [...walkSyntax(parsed.root)].find((node) => node.kind === "atomDecl")!;
+  assert.equal(text.slice(atom.start, atom.end), 'atom Cat id "🐈";');
+  assert.equal(
+    applySourceEdits(text, [{ ...atom, text: 'atom Dog id "dog";' }]),
+    text.replace('atom Cat id "🐈";', 'atom Dog id "dog";'),
+  );
+  assert.throws(
+    () =>
+      applySourceEdits(text, [
+        { start: 0, end: 4, text: "" },
+        { start: 3, end: 7, text: "" },
+      ]),
+    /overlapping/,
+  );
+  assert.throws(() => applySourceEdits(text, [{ start: -1, end: 0, text: "" }]), /Invalid/);
+});
+test("formatting preserves comments and strings, is idempotent, and rejects invalid source", () => {
+  const text = workspace.replace("}\n", 'atom Cat id "{ cat }"; /* multiline\n unchanged */\n}\n');
+  const formatted = formatQx(text);
+  assert.match(formatted, /  atom Cat id "\{ cat \}"; \/\* multiline\n unchanged \*\//);
+  assert.equal(formatQx(formatted), formatted);
+  assert.deepEqual(parseQx(formatted).diagnostics, []);
+  assert.throws(() => formatQx("workspace {"), /syntax errors/);
+});
+test("imports preserve root text, deduplicate diamonds, reject cycles, and compile together", async () => {
+  const root = addWorkspaceImport(addWorkspaceImport(workspace, "a.qx"), "b.qx");
+  assert.equal(addWorkspaceImport(root, "a.qx"), root);
+  assert.match(root, /keep 🐈 comment/);
+  const files: Record<string, string> = {
+    "workspace.qx": root,
+    "a.qx": 'fragment { import "shared.qx"; atom A id "a"; }',
+    "b.qx": 'fragment { import "shared.qx"; atom B id "b"; }',
+    "shared.qx": 'fragment { atom Shared id "shared"; }',
+  };
+  const result = await resolveQxSources(async (name) => files[name]!);
+  assert.equal(result.sourceFiles.length, 4);
+  const compiled = compileCapabilitySource(result.source);
+  assert.equal(compiled.ok, true, JSON.stringify(compiled.diagnostics));
+  if (compiled.ok) assert.equal(compiled.workspace.atoms.length, 3);
+  const unresolved = compileCapabilitySource(root);
+  assert.equal(unresolved.ok, false);
+  assert.match(JSON.stringify(unresolved.diagnostics), /unresolved-source-import/);
+  files["shared.qx"] = 'fragment { import "a.qx"; }';
+  await assert.rejects(
+    resolveQxSources(async (name) => files[name]!),
+    /cycle/,
+  );
+  assert.throws(() => addWorkspaceImport(workspace, "../x.qx"), /Invalid/);
+});
+test("repository scaffolding validates before writing and refuses duplicates and symlinks", async (t) => {
+  const root = await mkdtemp(path.join(os.tmpdir(), "qx-scaffold-"));
+  t.after(() => rm(root, { recursive: true, force: true }));
+  await writeFile(path.join(root, "workspace.qx"), workspace);
+  await writeFile(
+    path.join(root, "quixos.lock"),
+    `quixos-lock version 1 { quixos source { repository "https://example.test/q.git"; commit "${"1".repeat(40)}"; } }`,
+  );
+  const resolveResource = async (): Promise<never> => {
+    throw new Error("unexpected resource");
+  };
+  const options = { root, name: "Cat", id: "cat", write: false, resolveResource };
+  await scaffoldAtom(options);
+  assert.equal(await readFile(path.join(root, "workspace.qx"), "utf8"), workspace);
+  await assert.rejects(readFile(path.join(root, "Cat.qx")), /ENOENT/);
+  await scaffoldAtom({ ...options, write: true });
+  const compiled = await compileWorkspaceRepository({ rootDirectory: root, resolveResource });
+  assert.equal(compiled.workspace.atoms[0]!.id, "cat");
+  await assert.rejects(scaffoldAtom({ ...options, write: true }), /already exists/);
+  await assert.rejects(scaffoldAtom({ ...options, name: "Other", write: true }), /Duplicate|duplicate/);
+  await assert.rejects(readFile(path.join(root, "Other.qx")), /ENOENT/);
+  await symlink(path.join(root, "Cat.qx"), path.join(root, "link.qx"));
+  await assert.rejects(readQxSource(root, "link.qx"), /ordinary files/);
+});
+test("lowering diagnostics map to the imported file", async () => {
+  const files: Record<string, string> = {
+    "workspace.qx": addWorkspaceImport(workspace, "bad.qx"),
+    "bad.qx": "fragment {\n conform Missing as Nope {}\n}",
+  };
+  const sources = await resolveQxSources(async (name) => files[name]!);
+  const compiled = compileCapabilitySource(sources.source);
+  assert.equal(compiled.ok, false);
+  const diagnostic = compiled.diagnostics[0]!;
+  const position = sources.originalPosition(diagnostic.line, diagnostic.column);
+  assert.equal(position.fileName, "bad.qx");
+  assert.equal(position.line, 2);
+});

test/react-fields.test.ts

@@ -0,0 +1,187 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { spawnSync } from "node:child_process";
+import { compileCapabilityResourceSource, compileCapabilitySource } from "../src/capability-language/parser.js";
+import { generateReactBindings } from "../src/bindings/react.js";
+import { reactPlatformTypes } from "../src/bindings/react-platform.js";
+
+const source = { repository: "https://example.test/fields.git", commit: "a".repeat(40) };
+test("React bindings preserve read-only, writable and nested reference contracts", async (t) => {
+  const iface = compileCapabilityResourceSource(
+    `interface Fields id "fields" revision "fields@1" {
+    value title id "title" : string { get id "title:get"; set id "title:set"; watch start id "watch" stop id "stop"; }
+    value summary id "summary" : string { get id "summary:get"; }
+  }`,
+    { source },
+  );
+  assert.ok(iface.ok && iface.resource.kind === "interface");
+  if (!iface.ok || iface.resource.kind !== "interface") throw new Error("interface failed");
+  const pkg = compileCapabilityResourceSource(
+    `import interface Fields; package P id "p" revision "p@1" {
+    function props id "props" : unit -> record {fields: interface-ref<Fields>; caption: string;};
+  }`,
+    { source, environment: { interfaces: new Map([["Fields", iface.resource.revision]]) } },
+  );
+  assert.ok(pkg.ok && pkg.resource.kind === "package");
+  if (!pkg.ok || pkg.resource.kind !== "package") throw new Error("package failed");
+  const schema = {
+    format: "quixos-bindings",
+    version: 1,
+    interfaces: [iface.resource.revision],
+    packages: [pkg.resource.revision],
+  } as const;
+  const generated = generateReactBindings(
+    { ...schema, interfaces: [...schema.interfaces], packages: [...schema.packages] },
+    "p@1",
+    ["props"],
+  );
+  assert.match(generated, /"title": WritableField<string>/);
+  assert.match(generated, /"summary": ReadableField<string>/);
+  assert.throws(
+    () => generateReactBindings({ ...schema, interfaces: [], packages: [...schema.packages] }, "p@1", ["props"]),
+    /Missing React reference/,
+  );
+  const root = await fs.mkdtemp(path.join(os.tmpdir(), "qx-react-types-"));
+  t.after(() => fs.rm(root, { recursive: true, force: true }));
+  await fs.writeFile(path.join(root, "react-props.gen.ts"), generated);
+  await fs.writeFile(
+    path.join(root, "platform.d.ts"),
+    reactPlatformTypes +
+      '\ndeclare module "react" {export type ReactNode = unknown; export type CSSProperties = {}; export function createElement(...args: unknown[]): unknown;}\n',
+  );
+  await fs.writeFile(
+    path.join(root, "consumer.ts"),
+    `import {useLiveField, type ReadableField, type WritableField} from "@quixos/web-studio-react-runtime";
+import type {ReactResults} from "./react-props.gen.js";
+declare const props: ReactResults["props"];
+const [title, setTitle] = useLiveField(props.fields.fields.title);
+setTitle("new");
+// @ts-expect-error wrong setter value
+setTitle(123);
+// @ts-expect-error read-only hook has no setter
+const [summary, setSummary] = useLiveField(props.fields.fields.summary);
+const [manual, write] = useLiveField(props.fields.fields.summary, {write: async (value: string) => {}});
+write("new");
+const readonly: ReadableField<string> = props.fields.fields.title;
+// @ts-expect-error read-only does not satisfy writable
+const writable: WritableField<string> = props.fields.fields.summary;
+declare const narrow: WritableField<"only">;
+// @ts-expect-error writable references are invariant
+const widened: WritableField<string> = narrow;
+// @ts-expect-error callbacks must accept the field's type
+useLiveField(props.fields.fields.summary, {write: async (value: number) => {}});
+`,
+  );
+  const result = spawnSync(
+    process.execPath,
+    [
+      path.resolve("node_modules/typescript/bin/tsc"),
+      "--strict",
+      "--noEmit",
+      "--skipLibCheck",
+      "--target",
+      "ES2022",
+      path.join(root, "platform.d.ts"),
+      path.join(root, "consumer.ts"),
+    ],
+    { encoding: "utf8", cwd: root },
+  );
+  assert.equal(result.status, 0, result.stdout + result.stderr);
+  await fs.writeFile(
+    path.join(root, "react-props.gen.ts"),
+    generateReactBindings(
+      { ...schema, interfaces: [...schema.interfaces], packages: [...schema.packages] },
+      "p@1",
+      ["props"],
+      [{ module: "./component.js", propsExport: "props" }],
+    ),
+  );
+  const checkComponent = () =>
+    spawnSync(
+      process.execPath,
+      [
+        path.resolve("node_modules/typescript/bin/tsc"),
+        "--strict",
+        "--noEmit",
+        "--skipLibCheck",
+        "--target",
+        "ES2022",
+        path.join(root, "platform.d.ts"),
+        path.join(root, "react-props.gen.ts"),
+        path.join(root, "component.ts"),
+      ],
+      { encoding: "utf8", cwd: root },
+    );
+  await fs.writeFile(
+    path.join(root, "component.ts"),
+    'import type {ReactResults} from "./react-props.gen.js"; export default function Component(props: {camino: ReactResults["props"]}) {return null;}',
+  );
+  const matching = checkComponent();
+  assert.equal(matching.status, 0, matching.stdout + matching.stderr);
+  await fs.writeFile(
+    path.join(root, "component.ts"),
+    'import type {WritableField} from "@quixos/web-studio-react-runtime"; export default function Component(props: {camino: {fields: {fields: {summary: WritableField<string>}}}}) {return null;}',
+  );
+  const incompatible = checkComponent();
+  assert.notEqual(incompatible.status, 0, "component cannot strengthen a read-only prop into a writable field");
+  assert.match(incompatible.stdout + incompatible.stderr, /writable|WritableField/);
+});
+
+test("class factories specialize return types and reject instance implementations or mismatched inputs", () => {
+  const factory = compileCapabilityResourceSource(
+    'interface Factory<object T> id "factory" revision "factory@1" {static operation create id "create" : unit -> ref<T> {call id "call";}}',
+    { source },
+  );
+  assert.ok(factory.ok && factory.resource.kind === "interface");
+  if (!factory.ok || factory.resource.kind !== "interface") throw new Error("factory failed");
+  const factoryRevision = factory.resource.revision;
+  const compile = (declaration: string) => {
+    const pkg = compileCapabilityResourceSource(
+      `external atom Note id "note"; package P id "p" revision "p@1" {${declaration}}`,
+      { source },
+    );
+    assert.ok(pkg.ok && pkg.resource.kind === "package", JSON.stringify(pkg.diagnostics));
+    if (!pkg.ok || pkg.resource.kind !== "package") throw new Error("package failed");
+    return compileCapabilitySource(
+      `workspace W id "w" revision "w@1" commit "${source.commit}" {
+      atom Note id "note"; import interface Factory; import package P;
+      conform Note as Factory<atom Note> id "factory-conformance" {bind create.call to package P.make;}
+    }`,
+      "workspace.qx",
+      { interfaces: new Map([["Factory", factoryRevision]]), packages: new Map([["P", pkg.resource.revision]]) },
+    );
+  };
+  const good = compile('function make id "make" : unit -> atom-ref<Note>;');
+  assert.ok(good.ok, JSON.stringify(good.diagnostics));
+  assert.equal(good.workspace.interfaceImports[0].members[0].operations[0].scope, "class");
+  const wrongInput = compile('function make id "make" : string -> atom-ref<Note>;');
+  assert.equal(wrongInput.ok, false);
+  const wrongReceiver = compile('operation make id "make" : unit -> atom-ref<Note> mode call receiver atom Note;');
+  assert.equal(wrongReceiver.ok, false);
+  assert.match(JSON.stringify(wrongReceiver.diagnostics), /free function/);
+});
+
+test("state-field shorthand binds exactly the declared accessors, never invents writes", () => {
+  const iface = compileCapabilityResourceSource(
+    'interface Reader id "reader" revision "reader@1" {value title id "title" : string {get id "get"; watch start id "watch" stop id "stop";}}',
+    { source },
+  );
+  assert.ok(iface.ok && iface.resource.kind === "interface");
+  if (!iface.ok || iface.resource.kind !== "interface") throw new Error("interface failed");
+  const result = compileCapabilitySource(
+    `workspace W id "w" revision "w@1" commit "${source.commit}" {
+    atom Note id "note"; import interface Reader;
+    conform Note as Reader id "reader-conformance" {private state Title id "title-slot" on Note : string policy crdt(string) default ""; bind title to state Title;}
+  }`,
+    "workspace.qx",
+    { interfaces: new Map([["Reader", iface.resource.revision]]) },
+  );
+  assert.ok(result.ok, JSON.stringify(result.diagnostics));
+  assert.deepEqual(
+    result.workspace.conformances[0].operationBindings.map((binding) => binding.operationId),
+    ["get", "watch", "stop"],
+  );
+});

test/resource-lock.test.ts

@@ -141,25 +141,34 @@ test("resolves root-relative lock fragments into one deterministic resource clos
     }
   }`;
   const sources = new Map([
-    ["locks/web-studio.lock", `quixos-lock fragment version 1 {
+    [
+      "locks/web-studio.lock",
+      `quixos-lock fragment version 1 {
       import "locks/shared.lock";
       interface Placeable source {
         repository "https://repos.example/alice/interface-placeable.git";
         commit "${namedCommit}";
       }
-    }`],
+    }`,
-    ["locks/shared.lock", `quixos-lock fragment version 1 {
+    ],
+    [
+      "locks/shared.lock",
+      `quixos-lock fragment version 1 {
       interface Named source {
         repository "https://repos.example/alice/interface-named.git";
         commit "${namedCommit}";
       }
-    }`],
+    }`,
-    ["locks/domain.lock", `quixos-lock fragment version 1 {
+    ],
+    [
+      "locks/domain.lock",
+      `quixos-lock fragment version 1 {
       package TodoRuntime source {
         repository "https://repos.example/alice/package-todo.git";
         commit "${packageCommit}";
       }
-    }`],
+    }`,
+    ],
   ]);
   const result = await resolveQuixosLock(root, async (relativePath) => {
     const source = sources.get(relativePath);
@@ -174,12 +183,15 @@ test("resolves root-relative lock fragments into one deterministic resource clos
     "locks/shared.lock",
     "locks/domain.lock",
   ]);
-  assert.deepEqual(result.lock.resources.map(({ kind, binding }) => ({ kind, binding })), [
+  assert.deepEqual(
-    { kind: "package", binding: "RootRuntime" },
+    result.lock.resources.map(({ kind, binding }) => ({ kind, binding })),
-    { kind: "interface", binding: "Placeable" },
+    [
-    { kind: "interface", binding: "Named" },
+      { kind: "package", binding: "RootRuntime" },
-    { kind: "package", binding: "TodoRuntime" },
+      { kind: "interface", binding: "Placeable" },
-  ]);
+      { kind: "interface", binding: "Named" },
+      { kind: "package", binding: "TodoRuntime" },
+    ],
+  );
 });
 
 test("lock fragments format canonically and cannot redeclare the Quixos source", () => {
@@ -187,35 +199,43 @@ test("lock fragments format canonically and cannot redeclare the Quixos source",
     kind: "fragment" as const,
     formatVersion: 1 as const,
     imports: ["locks/shared.lock"],
-    resources: [{
+    resources: [
-      kind: "interface" as const,
+      {
-      binding: "Named",
+        kind: "interface" as const,
-      source: {
+        binding: "Named",
-        resolver: "git" as const,
+        source: {
-        repository: "https://repos.example/alice/interface-named.git",
+          resolver: "git" as const,
-        commit: namedCommit,
+          repository: "https://repos.example/alice/interface-named.git",
+          commit: namedCommit,
+        },
       },
-    }],
+    ],
   };
   assert.deepEqual(parseQuixosLockDocument(formatQuixosLockDocument(document)), {
     ok: true,
     document,
     diagnostics: [],
   });
-  const invalid = parseQuixosLockDocument(`quixos-lock fragment version 1 {
+  const invalid = parseQuixosLockDocument(
+    `quixos-lock fragment version 1 {
     quixos source {
       repository "https://gitea.example/quixos/quixos.git";
       commit "${quixosCommit}";
     }
-  }`, "bad.lock");
+  }`,
+    "bad.lock",
+  );
   assert.equal(invalid.ok, false);
   if (!invalid.ok) assert.equal(invalid.diagnostics[0]?.code, "fragment-has-quixos-source");
 });
 
 test("lock imports reject traversal, cycles, root documents, and cross-file binding collisions", async () => {
-  const invalidPath = parseQuixosLockDocument(`quixos-lock fragment version 1 {
+  const invalidPath = parseQuixosLockDocument(
+    `quixos-lock fragment version 1 {
     import "../outside.lock";
-  }`, "bad-path.lock");
+  }`,
+    "bad-path.lock",
+  );
   assert.equal(invalidPath.ok, false);
   if (!invalidPath.ok) assert.equal(invalidPath.diagnostics[0]?.code, "invalid-import-path");
 
@@ -232,24 +252,26 @@ test("lock imports reject traversal, cycles, root documents, and cross-file bind
     }
   }`;
   const sources = new Map([
-    ["a.lock", `quixos-lock fragment version 1 {
+    [
+      "a.lock",
+      `quixos-lock fragment version 1 {
       import "b.lock";
       interface Named source {
         repository "https://repos.example/alice/interface-named-copy.git";
         commit "${namedCommit}";
       }
-    }`],
+    }`,
+    ],
     ["b.lock", `quixos-lock fragment version 1 { import "a.lock"; }`],
     ["root-again.lock", root],
   ]);
   const result = await resolveQuixosLock(root, async (relativePath) => sources.get(relativePath) ?? "");
   assert.equal(result.ok, false);
   if (!result.ok) {
-    assert.deepEqual(new Set(result.diagnostics.map(({ code }) => code)), new Set([
+    assert.deepEqual(
-      "duplicate-resource-binding",
+      new Set(result.diagnostics.map(({ code }) => code)),
-      "import-cycle",
+      new Set(["duplicate-resource-binding", "import-cycle", "imported-root-lock"]),
-      "imported-root-lock",
+    );
-    ]));
   }
 });
 
@@ -260,13 +282,16 @@ test("file loading rejects a symlink in any import path component", async (conte
   await mkdir(outside);
   await writeFile(path.join(outside, "fragment.lock"), "quixos-lock fragment version 1 {}\n");
   await symlink(outside, path.join(directory, "linked"), "dir");
-  await writeFile(path.join(directory, "quixos.lock"), `quixos-lock version 1 {
+  await writeFile(
+    path.join(directory, "quixos.lock"),
+    `quixos-lock version 1 {
     quixos source {
       repository "https://gitea.example/quixos/quixos.git";
       commit "${quixosCommit}";
     }
     import "linked/fragment.lock";
-  }`);
+  }`,
+  );
 
   const result = await loadQuixosLock(path.join(directory, "quixos.lock"));
   assert.equal(result.ok, false);

test/scaffold-recipes.test.ts

@@ -0,0 +1,124 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { execFile as callback } from "node:child_process";
+import { promisify } from "node:util";
+import { scaffoldRecipe } from "../src/capability-language/scaffold-recipes.js";
+import { planStructure, applyStructure } from "../src/capability-language/structural-plan.js";
+import { contentDigest } from "../src/capability-model/evolution.js";
+import { sealMigrations } from "../src/capability-language/migration-seal.js";
+import { reactPlatformTypes } from "../src/bindings/react-platform.js";
+const execFile = promisify(callback);
+
+test("React preset applies its browser build script and shared-platform imports", async (context) => {
+  const root = await fs.mkdtemp(path.join(os.tmpdir(), "qx-react-recipe-"));
+  context.after(() => fs.rm(root, { recursive: true, force: true }));
+  await execFile("git", ["-C", root, "init"]);
+  const source = { repository: "https://example.test/react.git", commit: "a".repeat(40) };
+  const request = await scaffoldRecipe(root, "package", {
+    source,
+    name: "React",
+    id: "package:react",
+    revision: "package:react@1",
+    template: "typescript-react",
+    tools: { quixos: source, protocol: source, helpers: source, sdk: source },
+  });
+  await applyStructure(await planStructure(root, request));
+  assert.match(await fs.readFile(path.join(root, "src/impl/sourceGet.ts"), "utf8"), /component.js\?browser-source/);
+  assert.match(await fs.readFile(path.join(root, "flake.nix"), "utf8"), /browserSources = true/);
+  assert.equal(await fs.readFile(path.join(root, "src/gen/web-studio-react-runtime.d.ts"), "utf8"), reactPlatformTypes);
+  assert.match(await fs.readFile(path.join(root, "src/browser-assets.d.ts"), "utf8"), /declare module "\*\.css"/);
+  assert.deepEqual(
+    JSON.parse(await fs.readFile(path.join(root, "quixos.check.json"), "utf8")).options.react.propsExports,
+    [],
+  );
+  await assert.rejects(fs.access(path.join(root, "quixos.scaffold.json")));
+  assert.equal(
+    JSON.parse(await fs.readFile(path.join(root, "tsconfig.json"), "utf8")).compilerOptions.jsx,
+    "react-jsx",
+  );
+});
+
+test("imperative scaffolds preserve authored wiring; migration sealing is explicit and separate", async (context) => {
+  const root = await fs.mkdtemp(path.join(os.tmpdir(), "qx-recipes-"));
+  context.after(() => fs.rm(root, { recursive: true, force: true }));
+  await execFile("git", ["-C", root, "init"]);
+  await fs.writeFile(path.join(root, ".gitignore"), ".quixos/\n");
+  const source = { repository: "https://example.test/chess.git", commit: "a".repeat(40) };
+  const base = { source, directory: "packages/Chess" };
+  const apply = async (command: Parameters<typeof scaffoldRecipe>[1], input: Parameters<typeof scaffoldRecipe>[2]) =>
+    applyStructure(await planStructure(root, await scaffoldRecipe(root, command, input)));
+  await apply("package", {
+    ...base,
+    name: "Chess",
+    id: "package:chess",
+    revision: "package:chess@1",
+    tools: { quixos: source, protocol: source, helpers: source, sdk: source },
+  });
+  await apply("function", { ...base, name: "play", id: "export:play" });
+  const filename = path.join(root, base.directory, "src/impl/play.ts");
+  const edited =
+    'import type {Implementation} from "../gen/qx.js";\nexport const handler: Implementation["play"] = async () => null;\n';
+  await fs.writeFile(filename, edited);
+  const old = { version: 1 },
+    next = { version: 2 },
+    from = contentDigest(old),
+    to = contentDigest(next);
+  await apply("migration", {
+    ...base,
+    name: "upgrade",
+    id: "export:upgrade",
+    migration: {
+      id: "upgrade-v2",
+      scopeId: "board",
+      from,
+      to,
+      predecessors: [],
+      ports: [],
+      contracts: { [from]: old, [to]: next },
+    },
+  });
+  const migrationFile = path.join(root, base.directory, "src/migrations/upgrade.ts");
+  await fs.appendFile(migrationFile, "\n// authored migration change\n");
+  await sealMigrations(path.join(root, base.directory));
+  assert.equal(await fs.readFile(filename, "utf8"), edited);
+  const catalog = JSON.parse(await fs.readFile(path.join(root, base.directory, "quixos.migrations.json"), "utf8"));
+  assert.equal(catalog.migrations[0].implementation.digest, contentDigest(await fs.readFile(migrationFile, "utf8")));
+  assert.match(await fs.readFile(path.join(root, base.directory, "src/migrate.ts"), "utf8"), /export:upgrade/);
+  await assert.rejects(() => apply("function", { ...base, name: "play", id: "export:play" }), /unique/);
+  const declarations = path.join(root, base.directory, "package.qx");
+  await fs.writeFile(
+    declarations,
+    (await fs.readFile(declarations, "utf8")).replace(
+      /}\s*$/,
+      '  function authored id "export:authored" : unit -> unit;\n}\n',
+    ),
+  );
+  const server = path.join(root, base.directory, "src/server.ts");
+  await fs.appendFile(server, "\n// authored comment must survive\n");
+  await apply("function", { ...base, name: "another", id: "export:another" });
+  assert.match(await fs.readFile(server, "utf8"), /authored comment must survive/);
+  await assert.rejects(() => apply("refresh", base), /removed/);
+  await assert.rejects(fs.access(path.join(root, base.directory, "src/impl/authored.ts")));
+  assert.equal(await fs.readFile(filename, "utf8"), edited);
+  await planStructure(root, {
+    kind: "package",
+    source,
+    resourceRoot: base.directory,
+    validation: "syntax",
+    files: [
+      {
+        file: `${base.directory}/package.qx`,
+        edits: [
+          {
+            operation: "replace",
+            target: { kind: "packageResourceDecl", id: "package:chess" },
+            source: 'package Other id "package:other" revision "package:other@1" {}',
+          },
+        ],
+      },
+    ],
+  });
+});

test/structural-edits.test.ts

@@ -0,0 +1,103 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import {
+  editStructure,
+  scaffoldResourceSource,
+  instantiateWorkspaceIdentity,
+} from "../src/capability-language/structural-edits.js";
+
+test("template identity binding changes only the workspace header and is idempotent", () => {
+  const source =
+    '// workspace fake id "do-not-touch"\nworkspace Todo id "workspace:todo" revision "workspace:todo@1" commit "' +
+    "a".repeat(40) +
+    '" { atom Task id "atom:task"; }';
+  const id = "00000000-0000-0000-0000-000000000123";
+  const bound = instantiateWorkspaceIdentity(source, id);
+  assert.match(bound, /atom Task id "atom:task"/);
+  assert.ok(bound.startsWith('// workspace fake id "do-not-touch"'));
+  assert.ok(bound.includes(`workspace Todo id "${id}"`));
+  assert.equal(instantiateWorkspaceIdentity(bound, id), bound);
+  assert.throws(() => instantiateWorkspaceIdentity(source, "not-a-workspace"), /UUID/);
+});
+
+test("package scaffolding and function edits preserve surrounding source and use exact selectors", () => {
+  const source = `// 🧭 resource comment\n${scaffoldResourceSource("package", "Chess", "package:chess", "package:chess@1")}`;
+  const functionSource = 'function evaluate id "export:evaluate" : string -> string;';
+  const appended = editStructure(source, {
+    operation: "append",
+    parent: { kind: "packageResourceDecl", id: "package:chess" },
+    source: functionSource,
+  });
+  assert.ok(appended.startsWith("// 🧭 resource comment\n"));
+  assert.ok(appended.includes(functionSource));
+  const replaced = editStructure(appended, {
+    operation: "replace",
+    target: { kind: "packageFunctionExport", id: "export:evaluate" },
+    source: 'function evaluate id "export:evaluate" : unit -> string;',
+  });
+  assert.ok(replaced.includes(": unit -> string;"));
+  assert.ok(
+    !editStructure(replaced, {
+      operation: "remove",
+      target: { kind: "packageFunctionExport", id: "export:evaluate" },
+    }).includes("evaluate"),
+  );
+  assert.throws(
+    () =>
+      editStructure(source, { operation: "remove", target: { kind: "packageResourceDecl", id: "package:chess@1" } }),
+    /exactly once/,
+  );
+  assert.throws(
+    () =>
+      editStructure(source, { operation: "append", parent: { kind: "packageResourceDecl" }, source: "not valid QX" }),
+    /Invalid structural/,
+  );
+  const prefixed = `import interface Board;\nexternal atom Game id "atom:game";\n${source}`;
+  const replacedPackage = editStructure(prefixed, {
+    operation: "replace",
+    target: { kind: "packageResourceDecl", id: "package:chess" },
+    source: scaffoldResourceSource("package", "Chess", "package:chess", "package:chess@2"),
+  });
+  assert.ok(replacedPackage.startsWith('import interface Board;\nexternal atom Game id "atom:game";'));
+});
+
+test("dependency scaffolding validates exact sources and preserves unrelated lock comments", () => {
+  const source = `// 🧭 lock\nquixos-lock version 1 {\n quixos source { repository "https://example.test/quixos.git"; commit "${"a".repeat(40)}"; }\n // retained comment\n}\n`;
+  const dependency = {
+    operation: "dependency" as const,
+    kind: "package" as const,
+    name: "Chess",
+    source: { repository: "https://example.test/chess.git", commit: "b".repeat(40) },
+  };
+  const appended = editStructure(source, dependency);
+  assert.ok(appended.includes("// retained comment"));
+  assert.ok(appended.startsWith("// 🧭 lock\n"));
+  assert.throws(
+    () => editStructure(source, { ...dependency, source: { ...dependency.source, commit: "main" } }),
+    /Invalid dependency/,
+  );
+  const changed = editStructure(appended, { ...dependency, source: { ...dependency.source, commit: "c".repeat(40) } });
+  assert.ok(!changed.includes("b".repeat(40)));
+  assert.ok(!editStructure(changed, { ...dependency, source: null }).includes("package Chess"));
+});
+
+test("conformance enrollment, major edits, imports, and private attachment removal preserve valid structure", () => {
+  const source = `fragment { conform Game as Playable { private state Board id "slot:board" on Game : string policy optimistic-register; } }`;
+  const selector = { kind: "conformanceDecl", names: ["Game", "Playable"] };
+  const enrolled = editStructure(source, { operation: "conformance-id", target: selector, id: "conformance:playable" });
+  assert.ok(enrolled.includes('as Playable id "conformance:playable"'));
+  const major = editStructure(enrolled, {
+    operation: "semantic-major",
+    target: { kind: "conformanceDecl", id: "conformance:playable" },
+    major: 2,
+  });
+  assert.ok(major.includes("semantic-major 2"));
+  assert.throws(
+    () => editStructure(major, { operation: "conformance-id", target: selector, id: "different" }),
+    /Cannot change/,
+  );
+  const removed = editStructure(major, { operation: "remove", target: { kind: "stateDecl", id: "slot:board" } });
+  assert.ok(!removed.includes("private"));
+  const imported = editStructure(removed, { operation: "import", kind: "interface", name: "Playable" });
+  assert.equal(editStructure(imported, { operation: "import", kind: "interface", name: "Playable" }), imported);
+});

test/structural-plan.test.ts

@@ -0,0 +1,64 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { promisify } from "node:util";
+import { execFile as callback } from "node:child_process";
+import {
+  planStructure,
+  applyStructure,
+  resumeStructure,
+  type StructuralRequest,
+} from "../src/capability-language/structural-plan.js";
+const execFile = promisify(callback);
+
+test("structural plans validate the graph, journal originals, and reject stale edits", async (context) => {
+  const root = await fs.mkdtemp(path.join(os.tmpdir(), "qx-structural-test-"));
+  context.after(() => fs.rm(root, { recursive: true, force: true }));
+  await execFile("git", ["-C", root, "init"]);
+  await fs.writeFile(path.join(root, ".gitignore"), ".quixos/\n");
+  await fs.writeFile(
+    path.join(root, "quixos.lock"),
+    `quixos-lock version 1 { quixos source { repository "https://example.test/quixos.git"; commit "${"a".repeat(40)}"; } }`,
+  );
+  const before = `workspace Test id "workspace:test" revision "workspace:test@1" commit "${"b".repeat(40)}" { atom Subject id "atom:subject"; }`;
+  await fs.writeFile(path.join(root, "workspace.qx"), before);
+  const request: StructuralRequest = {
+    kind: "workspace",
+    files: [
+      {
+        file: "workspace.qx",
+        edits: [{ operation: "append", parent: { kind: "workspaceDecl" }, source: 'atom Game id "atom:game";' }],
+      },
+    ],
+  };
+  const plan = await planStructure(root, request);
+  assert.equal(await fs.readFile(path.join(root, "workspace.qx"), "utf8"), before);
+  await fs.writeFile(path.join(root, "workspace.qx"), `${before}\n// newer edit`);
+  await assert.rejects(() => applyStructure(plan), /Stale scaffold/);
+  await fs.writeFile(path.join(root, "workspace.qx"), before);
+  const applied = await applyStructure(plan);
+  assert.equal(applied.phase, "complete");
+  assert.ok((await fs.readFile(path.join(root, "workspace.qx"), "utf8")).includes("atom Game"));
+  const journal = JSON.parse(await fs.readFile(applied.journalPath, "utf8"));
+  assert.equal(journal.changes[0].before, before);
+  assert.equal((await resumeStructure(root, applied.id)).phase, "complete");
+  // Simulate a process interrupted after one file was written, before recording
+  // completion. Replay accepts the already-written exact after image.
+  journal.phase = "prepared";
+  await fs.writeFile(applied.journalPath, JSON.stringify(journal));
+  assert.equal((await resumeStructure(root, applied.id)).phase, "complete");
+  await assert.rejects(() => planStructure(root, request), /Duplicate|duplicate/);
+  // Cross-repository edits may temporarily refer to an unfinished provider.
+  const provisional: StructuralRequest = {
+    kind: "workspace",
+    validation: "syntax",
+    files: [{ file: "workspace.qx", edits: [{ operation: "import", kind: "interface", name: "NotImplementedYet" }] }],
+  };
+  const draft = await planStructure(root, provisional);
+  assert.equal(draft.validation, "syntax");
+  await applyStructure(draft);
+  assert.match(await fs.readFile(path.join(root, "workspace.qx"), "utf8"), /import interface NotImplementedYet/);
+  await assert.rejects(() => planStructure(root, { ...provisional, validation: "resource-graph" }));
+});

yarn-project.nix

@@ -156,6 +156,10 @@ let
   overriddenProject = optionalOverride overrideAttrs project;
 
 cacheEntries = {
+"@babel/helper-string-parser@npm:7.29.7" = { filename = "@babel-helper-string-parser-npm-7.29.7-87998d618e-194bc0f171.zip"; hash = "sha512-GUvA8XFuOW1f/eVq1hGXRfuVV2YsmGEVkOXkVJBng6TMshzpMFa462mkkJBEg05F2W5QrGlbvp4yIWSP4DPAbA=="; };
+"@babel/helper-validator-identifier@npm:7.29.7" = { filename = "@babel-helper-validator-identifier-npm-7.29.7-9939aac13d-4795354e7a.zip"; hash = "sha512-R5U1Tnrg3K+nLeHNBOxRJS3BSYUXFwvq8BngPv/Ft78TxrIaOUmnfge4Elvn8QbtETE1DY69RWauh0CUpybWKw=="; };
+"@babel/parser@npm:7.29.8" = { filename = "@babel-parser-npm-7.29.8-d8ac19f8b3-acc890c5e6.zip"; hash = "sha512-rMiQxeam3UCGOke1C6wRHXGF7m+74WPr4R1SFIVMoq25AUYq1NcYplCQ74S9IjDp6KtFouDKzMaF8fV6sLseKA=="; };
+"@babel/types@npm:7.29.8" = { filename = "@babel-types-npm-7.29.8-3f9597fc63-be7c279f0a.zip"; hash = "sha512-vnwnnwq/KghsYz4htJx8qAJ10FKDzFomi2enCMmRS9DJRPFCKz6zyzdoKir11WCr9SDM+bAbU+y/5rcfvD/d5g=="; };
 "@bufbuild/protobuf@npm:2.14.1" = { filename = "@bufbuild-protobuf-npm-2.14.1-78e9ea56a2-3f913aca03.zip"; hash = "sha512-P5E6ygPfhBnEsh2ADqVNf2yDalND5l1vaGJ57DVmxJB3KZOO8vlKXifZLo0/StzW4CcRi6Kbp2TSHhxjfN3HAg=="; };
 "@bufbuild/protoc-gen-es@npm:2.14.1" = { filename = "@bufbuild-protoc-gen-es-npm-2.14.1-230b1181a2-79f9fad1d5.zip"; hash = "sha512-efn60dVmXaptZUmyh4oPY/6/rbGHuFNAg/vrI4Ydwizz6mmmYKEvD45Ps8AtJO6ALxcYRBVt5C+0sXEuOgZ1aQ=="; };
 "@bufbuild/protoplugin@npm:2.14.1" = { filename = "@bufbuild-protoplugin-npm-2.14.1-ca1a20a987-6a727aa5a8.zip"; hash = "sha512-anJ6pahI4FA13tkPUOE65Sx3NXutalhHalbU/3ANyBPKxmTgzDC1IBNU5cFY6//rANyDUxbWaqLDhKLp2qXf4w=="; };

yarn.lock

@@ -5,6 +5,41 @@ __metadata:
   version: 10
   cacheKey: 10c0
 
+"@babel/helper-string-parser@npm:^7.29.7":
+  version: 7.29.7
+  resolution: "@babel/helper-string-parser@npm:7.29.7"
+  checksum: 10c0/194bc0f1716e396d5ffde56ad6119745fb9557662c98611590e5e454906783a4ccb21ce93056b8eb69a4909044834e45d96e50ac695bbe9e3221648fe033c06c
+  languageName: node
+  linkType: hard
+
+"@babel/helper-validator-identifier@npm:^7.29.7":
+  version: 7.29.7
+  resolution: "@babel/helper-validator-identifier@npm:7.29.7"
+  checksum: 10c0/4795354e7ae0dcafa72de1cd04ec51252dc1498517170beaf019e03effc5b7bf13c6b21a3949a77e07b8125be7f106ed1131350d8ebd4566ae874094a726d62b
+  languageName: node
+  linkType: hard
+
+"@babel/parser@npm:^7.28.0":
+  version: 7.29.8
+  resolution: "@babel/parser@npm:7.29.8"
+  dependencies:
+    "@babel/types": "npm:^7.29.8"
+  bin:
+    parser: ./bin/babel-parser.js
+  checksum: 10c0/acc890c5e6a6dd40863a47b50bac111d7185ee6fbbe163ebe11d5214854ca2adb901462ad4d718a65090ef84bd2230e9e8ab45a2e0caccc685f1f57ab0bb1e28
+  languageName: node
+  linkType: hard
+
+"@babel/types@npm:^7.29.8":
+  version: 7.29.8
+  resolution: "@babel/types@npm:7.29.8"
+  dependencies:
+    "@babel/helper-string-parser": "npm:^7.29.7"
+    "@babel/helper-validator-identifier": "npm:^7.29.7"
+  checksum: 10c0/be7c279f0abf2a086c633e21b49c7ca80275d05283cc5a268b67a708c9914bd0c944f1422b3eb3cb37682a2af5d560abf520ccf9b01b53ecbfe6b71fbc3fdde6
+  languageName: node
+  linkType: hard
+
 "@bufbuild/protobuf@npm:2.14.1, @bufbuild/protobuf@npm:^2.12.1":
   version: 2.14.1
   resolution: "@bufbuild/protobuf@npm:2.14.1"
@@ -44,6 +79,7 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "@quixos/quixos-protocol@workspace:."
   dependencies:
+    "@babel/parser": "npm:^7.28.0"
     "@bufbuild/protobuf": "npm:^2.12.1"
     "@bufbuild/protoc-gen-es": "npm:^2.12.1"
     "@types/node": "npm:^24"
@@ -52,8 +88,10 @@ __metadata:
     typescript: "npm:^7.0.2"
   bin:
     quixos-capability-compile: dist/src/capability-language/cli.js
+    quixos-codegen-ts: dist/src/bindings/cli.js
     quixos-descriptor-check: dist/src/descriptor-check.js
     quixos-lock-check: dist/src/resource-lock/cli.js
+    quixos-qx: dist/src/capability-language/tool-cli.js
     quixos-resource-compile: dist/src/capability-language/resource-cli.js
     quixos-workspace-compile: dist/src/capability-language/workspace-cli.js
   languageName: unknown