fix: guard bundled channel runtime against TDZ imports

src/config/bundled-channel-config-runtime.test.ts

@@ -18,4 +18,24 @@ describe("bundled channel config runtime", () => {
     expect(runtimeModule.getBundledChannelConfigSchemaMap().get("msteams")).toBeDefined();
     expect(runtimeModule.getBundledChannelRuntimeMap().get("msteams")).toBeDefined();
   });
+
+  it("falls back to static channel schemas when bundled plugin access hits a TDZ-style ReferenceError", async () => {
+    vi.resetModules();
+    vi.doMock("../channels/plugins/bundled.js", () => {
+      const mockModule = {} as { bundledChannelPlugins?: unknown };
+      Object.defineProperty(mockModule, "bundledChannelPlugins", {
+        enumerable: true,
+        get() {
+          throw new ReferenceError("Cannot access 'bundledChannelPlugins' before initialization.");
+        },
+      });
+      return mockModule;
+    });
+
+    const runtime = await import("./bundled-channel-config-runtime.js");
+    const configSchemaMap = runtime.getBundledChannelConfigSchemaMap();
+
+    expect(configSchemaMap.has("msteams")).toBe(true);
+    expect(configSchemaMap.has("whatsapp")).toBe(true);
+  });
 });

src/config/bundled-channel-config-runtime.ts

@@ -71,9 +71,18 @@ function buildBundledChannelMaps(
 }
 
 function readBundledChannelPlugins(): readonly BundledChannelPluginShape[] | undefined {
-  return Array.isArray(bundledChannelModule.bundledChannelPlugins)
-    ? (bundledChannelModule.bundledChannelPlugins as readonly BundledChannelPluginShape[])
-    : undefined;
+  try {
+    return Array.isArray(bundledChannelModule.bundledChannelPlugins)
+      ? (bundledChannelModule.bundledChannelPlugins as readonly BundledChannelPluginShape[])
+      : undefined;
+  } catch (error) {
+    // Circular bundled channel imports can transiently hit TDZ during test/bootstrap
+    // initialization. Fall back to metadata/static schemas until the registry is ready.
+    if (error instanceof ReferenceError) {
+      return undefined;
+    }
+    throw error;
+  }
 }
 
 function getBundledChannelMaps(): BundledChannelMaps {