Add checked React field bindings and Web Studio factories

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.

dist/bindings.d.ts

@@ -10,7 +10,6 @@ export type MessageBinding<T> = {
     decode(value: Value): T;
 };
 export type QxLiveValue = ReturnType<typeof liveValue>;
-export declare const opaqueReactPropsBinding: MessageBinding<Record<string, unknown>>;
 export type BindingValue<B> = B extends MessageBinding<infer T> ? T : never;
 export type QxHandler<C, O> = (context: C) => O | Promise<O>;
 export type QxDerived<C, O> = {
@@ -71,6 +70,7 @@ export type QxPortSpec = {
     inputType: QxValueType;
 };
 export type QxHandlerSpec = {
+    receiver?: "none";
     inputType: QxValueType;
     outputType: QxValueType;
     eventType?: QxValueType;

dist/bindings.d.ts.map

@@ -1 +1 @@
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+{"version":3,"file":"bindings.d.ts","sourceRoot":"","sources":["../src/bindings.ts"],"names":[],"mappings":"AACA,OAAO,EAAkC,KAAK,KAAK,EAAE,MAAM,oBAAoB,CAAC;AAChF,OAAO,EAGL,SAAS,EAGT,KAAK,cAAc,EACnB,KAAK,cAAc,EACpB,MAAM,YAAY,CAAC;AAEpB,YAAY,EAAE,WAAW,EAAE,MAAM,iBAAiB,CAAC;AAEnD,OAAO,CAAC,MAAM,UAAU,EAAE,OAAO,MAAM,CAAC;AACxC,MAAM,MAAM,aAAa,GAAG,MAAM,GAAG;IAAE,QAAQ,CAAC,CAAC,UAAU,CAAC,EAAE,IAAI,CAAA;CAAE,CAAC;AACrE,MAAM,MAAM,cAAc,CAAC,CAAC,IAAI;IAAE,MAAM,CAAC,KAAK,EAAE,CAAC,GAAG,KAAK,CAAC;IAAC,MAAM,CAAC,KAAK,EAAE,KAAK,GAAG,CAAC,CAAA;CAAE,CAAC;AACrF,MAAM,MAAM,WAAW,GAAG,UAAU,CAAC,OAAO,SAAS,CAAC,CAAC;AACvD,MAAM,MAAM,YAAY,CAAC,CAAC,IAAI,CAAC,SAAS,cAAc,CAAC,MAAM,CAAC,CAAC,GAAG,CAAC,GAAG,KAAK,CAAC;AAC5E,MAAM,MAAM,SAAS,CAAC,CAAC,EAAE,CAAC,IAAI,CAAC,OAAO,EAAE,CAAC,KAAK,CAAC,GAAG,OAAO,CAAC,CAAC,CAAC,CAAC;AAC7D,MAAM,MAAM,SAAS,CAAC,CAAC,EAAE,CAAC,IAAI;IAAE,IAAI,EAAE,SAAS,CAAC;IAAC,GAAG,EAAE,SAAS,CAAC,CAAC,EAAE,CAAC,CAAC,CAAA;CAAE,CAAC;AACxE,MAAM,MAAM,SAAS,CAAC,CAAC,IAAI;IAAE,EAAE,EAAE,MAAM,CAAC;IAAC,GAAG,CAAC,CAAC,EAAE,IAAI,EAAE,CAAC,OAAO,EAAE,CAAC,KAAK,OAAO,CAAC,CAAC,CAAC,GAAG,OAAO,CAAC,CAAC,CAAC,CAAC;IAAC,KAAK,IAAI,OAAO,CAAC,IAAI,CAAC,CAAA;CAAE,CAAC;AACxH,MAAM,MAAM,kBAAkB,CAAC,CAAC,IAAI;IAAE,MAAM,CAAC,EAAE,WAAW,CAAC;IAAC,WAAW,CAAC,EAAE,MAAM,OAAO,CAAC,SAAS,CAAC,CAAC,CAAC,CAAC,CAAA;CAAE,CAAC;AACxG,eAAO,MAAM,SAAS,GAAI,CAAC,EAAE,CAAC,OAAO,SAAS,CAAC,CAAC,EAAE,CAAC,CAAC,KAAG,SAAS,CAAC,CAAC,EAAE,CAAC,CAA+B,CAAC;AAErG,yEAAyE;AACzE,MAAM,MAAM,WAAW,GACnB;IAAE,IAAI,EAAE,SAAS,CAAC;IAAC,IAAI,EAAE,MAAM,GAAG,cAAc,CAAA;CAAE,GAClD;IAAE,IAAI,EAAE,QAAQ,CAAC;IAAC,IAAI,EAAE,MAAM,CAAA;CAAE,GAChC;IAAE,IAAI,EAAE,SAAS,CAAC;IAAC,YAAY,EAAE,MAAM,CAAA;CAAE,GACzC;IAAE,IAAI,EAAE,QAAQ,CAAC;IAAC,MAAM,EAAE,MAAM,CAAC,MAAM,EAAE,WAAW,CAAC,CAAA;CAAE,GACvD;IAAE,IAAI,EAAE,YAAY,CAAC;IAAC,WAAW,EAAE,OAAO,CAAA;CAAE,GAC5C;IAAE,IAAI,EAAE,UAAU,GAAG,MAAM,CAAC;IAAC,KAAK,EAAE,WAAW,CAAA;CAAE,CAAC;AACtD,MAAM,MAAM,eAAe,GAAG;IAAE,EAAE,EAAE,MAAM,CAAC;IAAC,SAAS,EAAE,WAAW,CAAC;IAAC,UAAU,EAAE,WAAW,CAAA;CAAE,CAAC;AAC9F,MAAM,MAAM,UAAU,GAClB;IAAE,IAAI,EAAE,OAAO,CAAC;IAAC,EAAE,EAAE,MAAM,CAAC;IAAC,SAAS,EAAE,WAAW,CAAC;IAAC,UAAU,EAAE,MAAM,EAAE,CAAA;CAAE,GAC3E;IAAE,IAAI,EAAE,MAAM,CAAC;IAAC,EAAE,EAAE,MAAM,CAAC;IAAC,UAAU,EAAE,MAAM,EAAE,CAAA;CAAE,GAClD;IAAE,IAAI,EAAE,WAAW,CAAC;IAAC,EAAE,EAAE,MAAM,CAAC;IAAC,UAAU,EAAE,MAAM,CAAC,MAAM,EAAE,eAAe,CAAC,CAAA;CAAE,GAC9E;IAAE,IAAI,EAAE,aAAa,CAAC;IAAC,EAAE,EAAE,MAAM,CAAC;IAAC,SAAS,EAAE,WAAW,CAAA;CAAE,CAAC;AAChE,MAAM,MAAM,aAAa,GAAG;IAC1B,QAAQ,CAAC,EAAE,MAAM,CAAC;IAClB,SAAS,EAAE,WAAW,CAAC;IACvB,UAAU,EAAE,WAAW,CAAC;IACxB,SAAS,CAAC,EAAE,WAAW,CAAC;IACxB,KAAK,EAAE,MAAM,CAAC,MAAM,EAAE,UAAU,CAAC,CAAC;CACnC,CAAC;AACF,MAAM,MAAM,UAAU,GAAG,MAAM,CAAC,MAAM,EAAE,cAAc,CAAC,GAAG,CAAC,CAAC,CAAC;AAG7D,eAAO,MAAM,aAAa,SAAU,WAAW,SAAS,KAAK,GAAG,SAAS,YAAY,UAAU,KAAG,GAyCjG,CAAC;AAOF,eAAO,MAAM,aAAa,SAAU,WAAW,SAAS,GAAG,YAAY,UAAU,KAAG,KA8BnF,CAAC;AAmBF,uFAAuF;AACvF,eAAO,MAAM,aAAa,GAAI,CAAC,EAAE,CAAC,QAC1B,aAAa,WACV,SAAS,CAAC,CAAC,EAAE,CAAC,CAAC,GAAG,SAAS,CAAC,CAAC,EAAE,CAAC,CAAC,YAChC,UAAU,KACnB,cAAc,GAAG,cA4GnB,CAAC"}

dist/bindings.js

@@ -2,21 +2,6 @@ import { create } from "@bufbuild/protobuf";
 import { ValueSchema, ObjectValueSchema } from "./camino/api_pb.js";
 import { derived, jsToProtoValue, liveValue, protoValueToJs, } from "./index.js";
 import { assertReferenceFree, referenceToWire } from "./references.js";
-const reactPropsDescriptor = "org.quixos.web-studio.ReactProps";
-// Explicit temporary props exception, matching orch's RPC contract. Field shapes
-// remain unchecked pending generics; ordinary messages and state do not gain it.
-export const opaqueReactPropsBinding = {
-    encode(value) {
-        if (!value || typeof value !== "object" || Array.isArray(value))
-            throw new Error("React props must be an object");
-        return jsToProtoValue(value);
-    },
-    decode(value) {
-        if (value.kind.case !== "objectValue")
-            throw new Error("React props must be an object");
-        return protoValueToJs(value);
-    },
-};
 export const qxDerived = (get) => ({ kind: "derived", get });
 // Conversion belongs at the binding boundary. It does not add orchestrator validation.
 export const decodeQxValue = (type, value, messages) => {
@@ -42,11 +27,9 @@ export const decodeQxValue = (type, value, messages) => {
         return value.kind.value.values.map((entry) => decodeQxValue(type.value, entry, messages));
     }
     if (type.kind === "message") {
-        if (type.descriptorId !== reactPropsDescriptor)
+        assertReferenceFree(protoValueToJs(value));
-            assertReferenceFree(protoValueToJs(value));
         const decoded = requireMessage(messages, type.descriptorId).decode(value);
-        if (type.descriptorId !== reactPropsDescriptor)
+        assertReferenceFree(decoded);
-            assertReferenceFree(decoded);
         return decoded;
     }
     if (type.kind === "object-ref") {
@@ -99,12 +82,10 @@ export const encodeQxValue = (type, value, messages) => {
         referenceToWire(value);
         return jsToProtoValue(value);
     }
-    if (type.kind !== "message" || type.descriptorId !== reactPropsDescriptor)
+    assertReferenceFree(value);
-        assertReferenceFree(value);
     if (type.kind === "message") {
         const encoded = requireMessage(messages, type.descriptorId).encode(value);
-        if (type.descriptorId !== reactPropsDescriptor)
+        assertReferenceFree(protoValueToJs(encoded));
-            assertReferenceFree(protoValueToJs(encoded));
         return encoded;
     }
     return jsToProtoValue(value);
@@ -197,9 +178,9 @@ export const bindQxHandler = (spec, handler, messages) => {
             }
         }));
         return {
-            objectId: raw.objectId,
+            ...(spec.receiver === "none" ? {} : { objectId: raw.objectId }),
             signal: raw.signal,
-            ...(raw.openSession
+            ...(spec.receiver !== "none" && raw.openSession
                 ? {
                     openSession: async () => {
                         const session = await raw.openSession();

dist/index.d.ts.map

@@ -1 +1 @@
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dist/index.js

@@ -292,7 +292,9 @@ export const createRuntimeContext = (camino, orch, request) => {
         return port;
     };
     return {
-        objectId: referenceFromWire(request.objectId),
+        get objectId() {
+            return referenceFromWire(request.objectId);
+        },
         input: protoFieldsToJs(request.input),
         inputProto: request.input,
         ports,

dist/quixos/orch_pb.d.ts

@@ -1,5 +1,5 @@
 import type { GenFile, GenMessage, GenService } from "@bufbuild/protobuf/codegenv2";
-import type { CaminoObject, Value } from "../camino/api_pb.js";
+import type { CaminoObject, CrdtValue, Value } from "../camino/api_pb.js";
 import type { PackageDescriptor } from "./package_pb.js";
 import type { CapabilityRef, PackageExportRef } from "./refs_pb.js";
 import type { DerivedDependency } from "./runtime_pb.js";
@@ -113,6 +113,30 @@ export type InvokeCapabilityRequest = Message<"quixos.orch.InvokeCapabilityReque
  * Use `create(InvokeCapabilityRequestSchema)` to create a new message.
  */
 export declare const InvokeCapabilityRequestSchema: GenMessage<InvokeCapabilityRequest>;
+/**
+ * @generated from message quixos.orch.InvokeClassCapabilityRequest
+ */
+export type InvokeClassCapabilityRequest = Message<"quixos.orch.InvokeClassCapabilityRequest"> & {
+    /**
+     * @generated from field: string conformance_id = 1;
+     */
+    conformanceId: string;
+    /**
+     * @generated from field: string operation_id = 2;
+     */
+    operationId: string;
+    /**
+     * @generated from field: map<string, camino.Value> input = 3;
+     */
+    input: {
+        [key: string]: Value;
+    };
+};
+/**
+ * Describes the message quixos.orch.InvokeClassCapabilityRequest.
+ * Use `create(InvokeClassCapabilityRequestSchema)` to create a new message.
+ */
+export declare const InvokeClassCapabilityRequestSchema: GenMessage<InvokeClassCapabilityRequest>;
 /**
  * @generated from message quixos.orch.InvokeCapabilityResponse
  */
@@ -141,12 +165,80 @@ export type InvokeCapabilityResponse = Message<"quixos.orch.InvokeCapabilityResp
      * @generated from field: repeated quixos.runtime.DerivedDependency dependencies = 6;
      */
     dependencies: DerivedDependency[];
+    /**
+     * @generated from field: quixos.orch.FieldEditing field_editing = 7;
+     */
+    fieldEditing?: FieldEditing | undefined;
 };
 /**
  * Describes the message quixos.orch.InvokeCapabilityResponse.
  * Use `create(InvokeCapabilityResponseSchema)` to create a new message.
  */
 export declare const InvokeCapabilityResponseSchema: GenMessage<InvokeCapabilityResponse>;
+/**
+ * Resolved from the checked native getter/setter binding, not Value.source.
+ *
+ * @generated from message quixos.orch.FieldEditing
+ */
+export type FieldEditing = Message<"quixos.orch.FieldEditing"> & {
+    /**
+     * @generated from field: string getter_operation_id = 1;
+     */
+    getterOperationId: string;
+    /**
+     * @generated from field: string setter_operation_id = 2;
+     */
+    setterOperationId: string;
+    /**
+     * @generated from field: string document_type = 3;
+     */
+    documentType: string;
+    /**
+     * @generated from field: string binding_digest = 4;
+     */
+    bindingDigest: string;
+};
+/**
+ * Describes the message quixos.orch.FieldEditing.
+ * Use `create(FieldEditingSchema)` to create a new message.
+ */
+export declare const FieldEditingSchema: GenMessage<FieldEditing>;
+/**
+ * @generated from message quixos.orch.EditCapabilityFieldRequest
+ */
+export type EditCapabilityFieldRequest = Message<"quixos.orch.EditCapabilityFieldRequest"> & {
+    /**
+     * The public getter; setter must belong to the same value member.
+     *
+     * @generated from field: quixos.CapabilityRef capability = 1;
+     */
+    capability?: CapabilityRef | undefined;
+    /**
+     * @generated from field: string object_id = 2;
+     */
+    objectId: string;
+    /**
+     * @generated from field: string setter_operation_id = 3;
+     */
+    setterOperationId: string;
+    /**
+     * @generated from field: string binding_digest = 4;
+     */
+    bindingDigest: string;
+    /**
+     * @generated from field: camino.CrdtValue update = 5;
+     */
+    update?: CrdtValue | undefined;
+    /**
+     * @generated from field: string client_mutation_id = 6;
+     */
+    clientMutationId: string;
+};
+/**
+ * Describes the message quixos.orch.EditCapabilityFieldRequest.
+ * Use `create(EditCapabilityFieldRequestSchema)` to create a new message.
+ */
+export declare const EditCapabilityFieldRequestSchema: GenMessage<EditCapabilityFieldRequest>;
 /**
  * @generated from message quixos.orch.WatchCapabilityRequest
  */
@@ -203,6 +295,10 @@ export type WatchCapabilityEvent = Message<"quixos.orch.WatchCapabilityEvent"> &
      * @generated from field: bool initial = 7;
      */
     initial: boolean;
+    /**
+     * @generated from field: quixos.orch.FieldEditing field_editing = 8;
+     */
+    fieldEditing?: FieldEditing | undefined;
 };
 /**
  * Describes the message quixos.orch.WatchCapabilityEvent.
@@ -212,7 +308,14 @@ export declare const WatchCapabilityEventSchema: GenMessage<WatchCapabilityEvent
 /**
  * @generated from message quixos.orch.GetWorkspaceRequest
  */
-export type GetWorkspaceRequest = Message<"quixos.orch.GetWorkspaceRequest"> & {};
+export type GetWorkspaceRequest = Message<"quixos.orch.GetWorkspaceRequest"> & {
+    /**
+     * Revision polling must not download the entire interface graph.
+     *
+     * @generated from field: bool include_interface_contracts = 1;
+     */
+    includeInterfaceContracts: boolean;
+};
 /**
  * Describes the message quixos.orch.GetWorkspaceRequest.
  * Use `create(GetWorkspaceRequestSchema)` to create a new message.
@@ -235,8 +338,8 @@ export type GetWorkspaceResponse = Message<"quixos.orch.GetWorkspaceResponse"> &
      */
     sourceRootCommit: string;
     /**
-     * Checked constructors whose wire input can be empty. Web Studio intersects
+     * Checked constructors whose wire input can be empty. The create panel uses
-     * this with its temporary Createable marker; the marker is not a factory.
+     * class factory conformances instead of this constructor inventory.
      *
      * @generated from field: repeated string empty_input_constructible_atom_ids = 4;
      */
@@ -249,12 +352,60 @@ export type GetWorkspaceResponse = Message<"quixos.orch.GetWorkspaceResponse"> &
      * @generated from field: repeated quixos.orch.ConstructorInputContract constructor_inputs = 6;
      */
     constructorInputs: ConstructorInputContract[];
+    /**
+     * Exact closed interface contracts used by checked presentation consumers.
+     *
+     * @generated from field: string interfaces_json = 7;
+     */
+    interfacesJson: string;
+    /**
+     * @generated from field: repeated quixos.orch.ClassCapability class_capabilities = 8;
+     */
+    classCapabilities: ClassCapability[];
 };
 /**
  * Describes the message quixos.orch.GetWorkspaceResponse.
  * Use `create(GetWorkspaceResponseSchema)` to create a new message.
  */
 export declare const GetWorkspaceResponseSchema: GenMessage<GetWorkspaceResponse>;
+/**
+ * @generated from message quixos.orch.ClassCapability
+ */
+export type ClassCapability = Message<"quixos.orch.ClassCapability"> & {
+    /**
+     * @generated from field: string conformance_id = 1;
+     */
+    conformanceId: string;
+    /**
+     * @generated from field: string atom_id = 2;
+     */
+    atomId: string;
+    /**
+     * @generated from field: string interface_revision_id = 3;
+     */
+    interfaceRevisionId: string;
+    /**
+     * @generated from field: string definition_id = 4;
+     */
+    definitionId: string;
+    /**
+     * @generated from field: string operation_id = 5;
+     */
+    operationId: string;
+    /**
+     * @generated from field: string input_type_json = 6;
+     */
+    inputTypeJson: string;
+    /**
+     * @generated from field: string output_type_json = 7;
+     */
+    outputTypeJson: string;
+};
+/**
+ * Describes the message quixos.orch.ClassCapability.
+ * Use `create(ClassCapabilitySchema)` to create a new message.
+ */
+export declare const ClassCapabilitySchema: GenMessage<ClassCapability>;
 /**
  * @generated from message quixos.orch.CapabilityInputContract
  */
@@ -516,6 +667,22 @@ export declare const OrchestratorRuntime: GenService<{
         input: typeof InvokeCapabilityRequestSchema;
         output: typeof InvokeCapabilityResponseSchema;
     };
+    /**
+     * @generated from rpc quixos.orch.OrchestratorRuntime.EditCapabilityField
+     */
+    editCapabilityField: {
+        methodKind: "unary";
+        input: typeof EditCapabilityFieldRequestSchema;
+        output: typeof InvokeCapabilityResponseSchema;
+    };
+    /**
+     * @generated from rpc quixos.orch.OrchestratorRuntime.InvokeClassCapability
+     */
+    invokeClassCapability: {
+        methodKind: "unary";
+        input: typeof InvokeClassCapabilityRequestSchema;
+        output: typeof InvokeCapabilityResponseSchema;
+    };
     /**
      * @generated from rpc quixos.orch.OrchestratorRuntime.WatchCapability
      */

src/bindings.ts

@@ -16,19 +16,6 @@ declare const watchBrand: unique symbol;
 export type QxWatchHandle = string & { readonly [watchBrand]: true };
 export type MessageBinding<T> = { encode(value: T): Value; decode(value: Value): T };
 export type QxLiveValue = ReturnType<typeof liveValue>;
-const reactPropsDescriptor = "org.quixos.web-studio.ReactProps";
-// Explicit temporary props exception, matching orch's RPC contract. Field shapes
-// remain unchecked pending generics; ordinary messages and state do not gain it.
-export const opaqueReactPropsBinding: MessageBinding<Record<string, unknown>> = {
-  encode(value) {
-    if (!value || typeof value !== "object" || Array.isArray(value)) throw new Error("React props must be an object");
-    return jsToProtoValue(value);
-  },
-  decode(value) {
-    if (value.kind.case !== "objectValue") throw new Error("React props must be an object");
-    return protoValueToJs(value) as Record<string, unknown>;
-  },
-};
 export type BindingValue<B> = B extends MessageBinding<infer T> ? T : never;
 export type QxHandler<C, O> = (context: C) => O | Promise<O>;
 export type QxDerived<C, O> = { kind: "derived"; get: QxHandler<C, O> };
@@ -51,6 +38,7 @@ export type QxPortSpec =
   | { kind: "interface"; id: string; operations: Record<string, QxOperationSpec> }
   | { kind: "constructor"; id: string; inputType: QxValueType };
 export type QxHandlerSpec = {
+  receiver?: "none";
   inputType: QxValueType;
   outputType: QxValueType;
   eventType?: QxValueType;
@@ -79,9 +67,9 @@ export const decodeQxValue = (type: QxValueType, value: Value | undefined, messa
     return value.kind.value.values.map((entry) => decodeQxValue(type.value, entry, messages));
   }
   if (type.kind === "message") {
-    if (type.descriptorId !== reactPropsDescriptor) assertReferenceFree(protoValueToJs(value));
+    assertReferenceFree(protoValueToJs(value));
     const decoded = requireMessage(messages, type.descriptorId).decode(value);
-    if (type.descriptorId !== reactPropsDescriptor) assertReferenceFree(decoded);
+    assertReferenceFree(decoded);
     return decoded;
   }
   if (type.kind === "object-ref") {
@@ -130,10 +118,10 @@ export const encodeQxValue = (type: QxValueType, value: any, messages: QxMessage
     referenceToWire(value);
     return jsToProtoValue(value);
   }
-  if (type.kind !== "message" || type.descriptorId !== reactPropsDescriptor) assertReferenceFree(value);
+  assertReferenceFree(value);
   if (type.kind === "message") {
     const encoded = requireMessage(messages, type.descriptorId).encode(value);
-    if (type.descriptorId !== reactPropsDescriptor) assertReferenceFree(protoValueToJs(encoded));
+    assertReferenceFree(protoValueToJs(encoded));
     return encoded;
   }
   return jsToProtoValue(value);
@@ -245,9 +233,9 @@ export const bindQxHandler = <C, O>(
       }),
     );
     return {
-      objectId: raw.objectId,
+      ...(spec.receiver === "none" ? {} : { objectId: raw.objectId }),
       signal: raw.signal,
-      ...(raw.openSession
+      ...(spec.receiver !== "none" && raw.openSession
         ? {
             openSession: async () => {
               const session = await raw.openSession!();

src/index.ts

@@ -409,7 +409,9 @@ export const createRuntimeContext = (
     return port as T;
   };
   return {
-    objectId: referenceFromWire(request.objectId),
+    get objectId() {
+      return referenceFromWire(request.objectId);
+    },
     input: protoFieldsToJs(request.input),
     inputProto: request.input,
     ports,

test/bindings.test.mjs

@@ -8,29 +8,35 @@ import {
   jsToProtoValue,
   liveValue,
   protoValueToJs,
-  opaqueReactPropsBinding,
 } from "../dist/index.js";
 const scalar = (name) => ({ kind: "scalar", name });
 const unit = { kind: "builtin", name: "unit" };
-test("opaque React props retain managed references while ordinary messages remain closed", () => {
+test("free function handlers never acquire a receiver or object session", async () => {
+  const handler = bindQxHandler(
+    { receiver: "none", inputType: unit, outputType: unit, ports: {} },
+    async (context) => {
+      assert.equal("objectId" in context, false);
+      assert.equal("openSession" in context, false);
+    },
+    {},
+  );
+  await handler({
+    inputProto: {},
+    get objectId() {
+      throw new Error("no receiver exists");
+    },
+    openSession() {
+      assert.fail("no object session");
+    },
+  });
+});
+test("React props no longer have an opaque-message reference escape hatch", () => {
   const descriptorId = "org.quixos.web-studio.ReactProps";
   const reference = referenceFromWire("obj:task");
   const type = { kind: "message", descriptorId };
-  const messages = { [descriptorId]: opaqueReactPropsBinding };
+  const messages = { [descriptorId]: { encode: jsToProtoValue, decode: protoValueToJs } };
-  const decoded = decodeQxValue(type, encodeQxValue(type, { subject: reference, title: "Task" }, messages), messages);
+  assert.throws(() => encodeQxValue(type, { subject: reference }, messages), /Managed references/);
-  assert.ok(decoded.subject.equals(reference));
+  assert.throws(() => decodeQxValue(type, jsToProtoValue({ subject: reference }), messages), /Managed references/);
-  assert.equal(decoded.title, "Task");
-  assert.throws(() => opaqueReactPropsBinding.encode(null), /object/);
-  assert.throws(() => opaqueReactPropsBinding.encode([]), /object/);
-  assert.throws(
-    () =>
-      encodeQxValue(
-        { kind: "message", descriptorId: "Ordinary" },
-        { subject: reference },
-        { Ordinary: opaqueReactPropsBinding },
-      ),
-    /Managed references/,
-  );
 });
 test("declared record inputs preserve opaque references without opening message codecs", async () => {
   const target = referenceFromWire("obj:board");