diff --git a/src/wf_contract_manifest/normalize.py b/src/wf_contract_manifest/normalize.py
index 59585503..811a11f7 100644
--- a/src/wf_contract_manifest/normalize.py
+++ b/src/wf_contract_manifest/normalize.py
@@ -132,6 +132,31 @@ def _schema(value: object, path: str) -> JsonSchema:
     return normalized
 
 
+def _is_named_schema_reference(value: object) -> bool:
+    return (
+        isinstance(value, Mapping)
+        and set(value) == {"$ref"}
+        and isinstance(value.get("$ref"), str)
+        and value["$ref"].startswith("#/components/schemas/")
+    )
+
+
+def _is_composed_named_result_schema(value: object) -> bool:
+    if not isinstance(value, Mapping):
+        return False
+
+    composition_keys = [key for key in ("allOf", "anyOf", "oneOf") if key in value]
+    if len(composition_keys) != 1:
+        return False
+
+    branches = value[composition_keys[0]]
+    return (
+        isinstance(branches, list)
+        and bool(branches)
+        and all(_is_named_schema_reference(branch) for branch in branches)
+    )
+
+
 def _error_component(value: object, path: str) -> JsonValue:
     """Normalize an OpenRPC error object, whose ``data`` member is a schema."""
     if not isinstance(value, Mapping):
@@ -269,22 +294,9 @@ def manifest_from_openrpc(document: Mapping[str, object]) -> ContractManifest:
                 f"{result_path}.schema", "missing success result schema"
             )
         raw_result_schema = result["schema"]
-        if not isinstance(raw_result_schema, Mapping):
-            raise ManifestError(
-                f"{result_path}.schema",
-                "success result must be a schema object",
-            )
-        named_result = (
-            set(raw_result_schema) == {"$ref"}
-            and isinstance(raw_result_schema.get("$ref"), str)
-            and raw_result_schema["$ref"].startswith("#/components/schemas/")
-        )
-        # This inspection RPC returns either its inventory or the standard
-        # revision-conflict workspace payload, so its OpenRPC result is a union.
-        if (
-            not named_result
-            and method_name != "workflow.draft_workspaces.inspect_authoring_contract"
-        ):
+        if not _is_named_schema_reference(
+            raw_result_schema
+        ) and not _is_composed_named_result_schema(raw_result_schema):
             raise ManifestError(
                 f"{result_path}.schema",
                 "success result must reference a named schema component",
diff --git a/tests/wf_contract_manifest/test_normalize.py b/tests/wf_contract_manifest/test_normalize.py
index 9ccf74fd..56bcee14 100644
--- a/tests/wf_contract_manifest/test_normalize.py
+++ b/tests/wf_contract_manifest/test_normalize.py
@@ -240,6 +240,43 @@ def test_rejects_invalid_result_schema_shape() -> None:
     )
 
 
+def test_accepts_composed_result_with_named_component_branches() -> None:
+    document = synthetic_openrpc_document()
+    document["methods"][1]["result"]["schema"] = {
+        "anyOf": [
+            {"$ref": "#/components/schemas/AlphaResult"},
+            {"$ref": "#/components/schemas/ZetaResult"},
+        ]
+    }
+
+    manifest = manifest_from_openrpc(document)
+
+    assert manifest["operations"][0]["result"] == {
+        "schema": {
+            "anyOf": [
+                {"$ref": "#/components/schemas/AlphaResult"},
+                {"$ref": "#/components/schemas/ZetaResult"},
+            ]
+        }
+    }
+
+
+def test_rejects_composed_result_with_an_inline_branch() -> None:
+    document = synthetic_openrpc_document()
+    document["methods"][1]["result"]["schema"] = {
+        "oneOf": [
+            {"$ref": "#/components/schemas/AlphaResult"},
+            {"type": "object"},
+        ]
+    }
+
+    assert_manifest_error(
+        document,
+        "$.methods[1].result.schema",
+        "success result must reference a named schema component",
+    )
+
+
 def test_reports_a_missing_success_result_schema() -> None:
     document = synthetic_openrpc_document()
     del document["methods"][1]["result"]["schema"]
diff --git a/web/packages/rpc/src/json-schema/rpc-parity.test.ts b/web/packages/rpc/src/json-schema/rpc-parity.test.ts
index a4c76e1e..c119ad4f 100644
--- a/web/packages/rpc/src/json-schema/rpc-parity.test.ts
+++ b/web/packages/rpc/src/json-schema/rpc-parity.test.ts
@@ -221,11 +221,22 @@ const authoringPathOption = {
   uses: ["step_input"],
 };
 
+const conditionalRuntimeContextOption = {
+  ...authoringPathOption,
+  path: "context.viewer_id",
+  label: "Viewer ID",
+  origin: "runtime_context",
+  required: false,
+  availability: "conditional",
+  reason: "available when the selected capability accepts runtime context",
+  uses: ["step_input"],
+};
+
 const authoringContractInventory = {
   workspace_id: "console.demo",
   revision: 7,
   selected_step_id: "render",
-  readable_sources: [authoringPathOption],
+  readable_sources: [authoringPathOption, conditionalRuntimeContextOption],
   step_input_targets: [
     {
       ...authoringPathOption,
@@ -1113,6 +1124,16 @@ const parityReport = (): ParityReport => {
 };
 
 describe("authored RPC and manifest schema parity", () => {
+  it("covers conditional runtime context sources with a reason", () => {
+    expect(authoringContractInventory.readable_sources).toContainEqual(
+      expect.objectContaining({
+        origin: "runtime_context",
+        availability: "conditional",
+        reason: "available when the selected capability accepts runtime context",
+      }),
+    );
+  });
+
   it("rejects empty segments in authored structural binding paths", () => {
     const cases: ReadonlyArray<{
       readonly method: keyof typeof authoredRpcSchemas;