Add imperative feature bundles, intrinsic component sizing, and authoring timing logs

Generate state-backed atoms, interfaces, relationships and React/CSS packages
in a resumable command that prints the full source diff. Keep scaffold output
ordinary editable code. Shorten installed authoring guides while preserving
contracts and clarify historical design context.

Test generated bundles through immutable Nix verification and cover browser
isolation, nested sizing, interruption recovery, and command help.

src/capability-language/authoring-check.ts

@@ -1,4 +1,5 @@
 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";
@@ -21,13 +22,22 @@ export async function checkAuthoring(start: string, output: string, options: { b
   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 captured = await promisify(callback)("quixos-qx", ["converge", context.workbench, directory], {
-      maxBuffer: 4 * 1024 * 1024, env: {...process.env, QUIXOS_JJ_NO_CHECKPOINT: "1"},
-    }).catch(error => {
+    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: ${path.join(output, "capture.log")}`);
+    capture.child.stderr?.on("data", chunk => appendFileSync(path.join(output, "capture.log"), chunk));
+    const captured = await capture.catch(error => {
       if (typeof error.stdout === "string" && error.stdout.trim().startsWith("{")) return {stdout: error.stdout};
       throw error;
     });
@@ -40,6 +50,7 @@ export async function checkAuthoring(start: string, output: string, options: { b
     }
     report.commit = converged.candidate.commit;
     report.phase = "verification";
+    await progress();
     const buildStarted = performance.now();
     console.error(`[${new Date().toISOString()}] Check: immutable Nix ${options.contractOnly ? "contract" : "verification"}; build output: ${path.join(output, "nix.log")}`);
     try {
@@ -53,6 +64,7 @@ export async function checkAuthoring(start: string, output: string, options: { b
     report.compilation = "passed";
     if (resource.kind === "workspace" && !options.contractOnly) {
       report.phase = "evolution";
+      await progress();
       let baseline = options.baseline;
       if (!baseline) {
         try {
@@ -73,7 +85,7 @@ export async function checkAuthoring(start: string, output: string, options: { b
   } catch (error) { report.blockers.push(String(error instanceof Error ? error.message : error)); }
   timings.totalMs = Math.round(performance.now() - started);
   Object.assign(report, {timings});
-  await fs.writeFile(path.join(output, "report.json"), JSON.stringify(report, null, 2));
+  await progress(false);
   if (options.contractOnly) return report;
   const records = path.join(context.workbench, ".quixos/checks");
   await fs.mkdir(records, { recursive: true });

src/capability-language/authoring-converge.ts

@@ -8,10 +8,17 @@ 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[]) => (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();
+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 };
@@ -92,7 +99,9 @@ export async function convergeAuthoring(start: string, target = "root") {
           } 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]);

src/capability-language/scaffold-recipes.ts

@@ -14,6 +14,8 @@ 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>};
@@ -69,7 +71,7 @@ export const scaffoldRecipe = async (root: string, command: "package" | "functio
     if (react) {
       create("src/component.tsx", `// Props are opaque at the platform boundary until capability generics exist.\nexport default function Component(_props: {camino: unknown; render: unknown; dispatch: (action: unknown) => void}) {\n  return <section><h1>${name}</h1><p>Edit this component, then run qx-workspace check.</p></section>;\n}\n`);
       create("src/impl/sourceGet.ts", `import componentSource from "../component.js?browser-source";\nimport type {Implementation} from "../gen/qx.js";\nexport const handler: Implementation["sourceGet"] = () => componentSource;\n`);
-      create("src/browser-assets.d.ts", `declare module "*?browser-source" { const source: string; export default source; }\n`);
+      create("src/browser-assets.d.ts", `declare module "*?browser-source" { const source: string; export default source; }\ndeclare module "*.css" {}\n`);
       create("src/gen/web-studio-react-runtime.d.ts", reactPlatformTypes);
     }
     create(".gitignore", "node_modules/\ndist/\n.quixos/\nresult\n.yarn/install-state.gz\n");
@@ -161,5 +163,31 @@ export const scaffoldRecipe = async (root: string, command: "package" | "functio
   create("src/migrate.ts", `import {serveMigration} from "@quixos/camino-package-runtime";\n` + migrations.map((entry, index) => `import {handler as impl${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", "quixos.check.json", "package.json"].includes(file)) throw new Error(`Not an initial authored file: ${file}`);
+      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/structural-plan.ts

@@ -22,7 +22,7 @@ export type StructuralRequest = {
 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|mjs|json|nix|txtpb))$/.test(file)
+  if (!/^(?:[A-Za-z0-9_-][A-Za-z0-9_.-]*\/)*(?:\.gitignore|\.yarnrc.yml|[A-Za-z0-9_-][A-Za-z0-9_.-]*\.(?:qx|lock|ts|tsx|css|mjs|json|nix|txtpb))$/.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> => {

src/capability-language/tool-cli.ts

@@ -2,6 +2,7 @@
 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";
@@ -41,6 +42,39 @@ const planSummary = (plan: Awaited<ReturnType<typeof planStructure>>) => ({
 
 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 ${matches.length}. Configure the workspace canvas before adding a bundle.`);
+    process.stdout.write(JSON.stringify({binding: matches[0]}) + "\n");
+    return;
+  }
   if (command === "package-identity") {
     if (args.length !== 1) throw new Error("usage: quixos-qx package-identity PACKAGE_QX");
     const authored = await readFile(args[0], "utf8");
@@ -91,12 +125,14 @@ const main = async () => {
     if (!args.length || args.length > 2) throw new Error("usage: quixos-qx converge WORKBENCH [REGISTERED_DIRECTORY] (join package writers first)");
     const context = await authoringContext(args[0]);
     if (command === "converge") {
+      console.error(`[${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;
@@ -173,7 +209,7 @@ const main = async () => {
     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", source: spec.source, files: [
-      {file: "interface.qx", create: `interface ${spec.name} id ${JSON.stringify(spec.id)} revision ${JSON.stringify(spec.revision)} {\n}\n`},
+      {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"},
     ]};