Function guard

packages/hosts/mcp/src/envelope.test.ts:248–249

(request: Request)

  });

const guard = (request: Request): Promise<Response | null> =>
  Effect.runPromise(preInitializeMethodNotFound(request));

describe("preInitializeMethodNotFound", () => {
  it("answers an unknown pre-init method with -32601 on a 200, echoing the id", async () => {