feat: mark wf builtins as platform sources

tests/wf_mcp/service/test_catalog.py

@@ -518,6 +518,15 @@ def test_source_catalog_finds_local_documentation_resource_directly(
     assert result.uri == test_resource.uri
 
 
+def test_broker_local_sources_are_platform_sources(tmp_path: Path) -> None:
+    service = WfMcpService(store=FileStore(tmp_path / "platform_sources"))
+
+    wf_recipes = service.capability_sources["wf.recipes"]
+
+    assert wf_recipes.policy.platform is True
+    assert wf_recipes.policy.binding_required is False
+
+
 def test_source_catalog_uses_catalog_store_only(tmp_path: Path) -> None:
     catalog_store = FileCatalogStore(tmp_path / "catalog")
     service = SourceCatalogService(

tests/wf_server/test_local_static_server.py

@@ -150,3 +150,12 @@ def test_local_static_server_has_no_source_registry_admin(tmp_path) -> None:
     server = build_local_static_workflow_server(tmp_path / "store")
 
     assert server.source_registry_admin is None
+
+
+def test_local_static_builtins_are_platform_sources(tmp_path) -> None:
+    server = build_local_static_workflow_server(tmp_path)
+
+    wf_std = server.context.specs.capability_sources["wf.std"]
+
+    assert wf_std.policy.platform is True
+    assert wf_std.policy.binding_required is False