merge: reconcile canonical startup ownership repair

Preserve the source prerequisite repair and Claude effort/resume contracts. Eight no-process controls and runner noemit pass; native readiness remains a hosted CI gate.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

packages/paperclip-runner/src/live/runnerd-codex-transport.test.ts

@@ -396,6 +396,9 @@ it("publishes spawned runner ownership before waiting for provider startup", asy
   });
   const opening = bundle.transport.request("thread/start", { cwd: tmpdir(), dynamicTools: codexSemanticToolSpecs() });
   try {
+    // Same-tick recovery must not mutate an already admitted fresh startup.
+    await expect(bundle.transport.request("thread/read", { threadId: "rejected-duplicate" }))
+      .rejects.toThrow("PRP provider thread is already started");
     await vi.waitFor(() => expect(onSpawn).toHaveBeenCalledOnce());
     expect(onSpawn).toHaveBeenCalledWith({ pid: expect.any(Number), processGroupId: expect.any(Number), startedAt: expect.any(String) });
     expect(bundle.transport.processInfo?.().pid).toBeGreaterThan(0);
@@ -403,13 +406,17 @@ it("publishes spawned runner ownership before waiting for provider startup", asy
     releaseOwnership();
     await opening;
     expect(activate).toHaveBeenCalledOnce();
+    const turnStarted = expectTurnStarted(bundle.transport.notifications()[Symbol.asyncIterator]());
+    void turnStarted.catch(() => undefined);
+    await bundle.transport.request("turn/start", { input: [{ type: "text", text: "Verify fixture turn delivery." }] });
+    await turnStarted;
   } finally {
     releaseOwnership();
     await opening.catch(() => undefined);
     await bundle.transport.close();
     await rm(stateDirectory, { recursive: true, force: true });
   }
-});
+}, 30_000);
 
 it("launches runnerd with its production durable outbox limits", () => {
   expect(runnerdLaunchProfileInternals.maxOutboxBytes).toBe(16 * 1024 * 1024);
@@ -2177,6 +2184,115 @@ it.each(["installed", "explicit"] as const)("records the selected %s Codex comma
   }
 });
 
+it("does not invoke deferred startup preparation after immediate close", async () => {
+  const prepare = vi.spyOn(runtimeMaterializer, "prepareIsolatedCodexHome").mockResolvedValue(undefined);
+  const registration = vi.fn(async () => ({ connectUrl: "ws://127.0.0.1:1", release: () => undefined }));
+  const launch = vi.fn(() => { throw new Error("unexpected launch"); });
+  const { transport } = createCapabilityRunnerdCodexTransport({
+    runnerBinary: resolve(import.meta.dirname, "../../package.json"), codexCommand: "/unused-fixture-command", sourceCodexHome: "",
+    controlPlaneRegistration: registration, runnerProcessLauncher: launch,
+  });
+  const opening = transport.request("thread/start", { cwd: tmpdir(), dynamicTools: [] });
+  void opening.catch(() => undefined);
+  try {
+    await transport.close();
+    await expect(opening).rejects.toThrow(/closed/);
+    expect(prepare).not.toHaveBeenCalled();
+    expect(registration).not.toHaveBeenCalled();
+    expect(launch).not.toHaveBeenCalled();
+  } finally {
+    await opening.catch(() => undefined);
+    await transport.close().catch(() => undefined);
+    prepare.mockRestore();
+  }
+});
+
+it("owns blocked Codex home preparation through driver abort without later registration or launch", async () => {
+  const root = await mkdtemp(join(tmpdir(), "runnerd-blocked-home-preparation-"));
+  const runnerBinary = join(root, "runnerd");
+  const command = join(root, "codex");
+  await writeFile(runnerBinary, "unexecuted fixture artifact", { mode: 0o700 });
+  await writeFile(command, "#!/bin/sh\nexit 99\n", { mode: 0o700 });
+  let releasePreparation!: () => void;
+  const preparationReleased = new Promise<void>(resolve => { releasePreparation = resolve; });
+  let markPreparationStarted!: () => void;
+  const preparationStarted = new Promise<void>(resolve => { markPreparationStarted = resolve; });
+  let closeSettled = false;
+  let preparationContinuedAfterClose = false;
+  const prepare = vi.spyOn(runtimeMaterializer, "prepareIsolatedCodexHome").mockImplementation(async input => {
+    markPreparationStarted();
+    await preparationReleased;
+    preparationContinuedAfterClose = closeSettled;
+    // A synthetic, credential-free write makes the owned preparation visible.
+    await mkdir(input.codexHome, { mode: 0o700 });
+    await writeFile(join(input.codexHome, "preparation-marker"), "fixture preparation drained\n", { mode: 0o600 });
+  });
+  const registration = vi.fn(async () => ({
+    connection: { mode: "connect" as const, connectUrl: "ws://127.0.0.1:1/fixture-never-connected" },
+    release: () => undefined,
+  }));
+  const launch = vi.fn(() => { throw new Error("fixture_stop_before_runner_launch"); });
+  const { transport } = createCapabilityRunnerdCodexTransport({
+    provider: "codex", runnerBinary, codexCommand: command, stateDirectory: root,
+    sourceCodexHome: "", environment: {}, controlPlaneRegistration: registration, runnerProcessLauncher: launch,
+  });
+  const request = transport.request.bind(transport);
+  let bootstrapOperation: Promise<Record<string, unknown>> | undefined;
+  const requestSpy = vi.spyOn(transport, "request").mockImplementation((method, params) => {
+    const operation = request(method, params);
+    if (method === "thread/start") bootstrapOperation = operation;
+    return operation;
+  });
+  const closeTransport = transport.close.bind(transport);
+  let closeOperation: Promise<void> | undefined;
+  const closeSpy = vi.spyOn(transport, "close").mockImplementation(reason => {
+    closeOperation ??= closeTransport(reason).then(() => { closeSettled = true; });
+    return closeOperation;
+  });
+  const controller = new AbortController();
+  const cancelled = new Error("fixture Codex bootstrap cancelled");
+  const driver = new CodexAppServerDriver({
+    taskEnvelope: {
+      schema: "paperclip.skillless_task.v1", objective: "Credential-free bootstrap ownership fixture.",
+      completionContract: { revision: "blocked-preparation-v1", criteria: [] },
+      constraints: [], expectedResultSchema: "paperclip.run_result.v1",
+    },
+    conversationMode: "direct", environment: {}, transportFactory: () => transport,
+  });
+  let openingSettled = false;
+  const opening = driver.openSession({ runId: "fixture-blocked-home", normalizedSessionId: "fixture-blocked-home", workingDirectory: root, signal: controller.signal })
+    .then(value => { openingSettled = true; return { value }; }, error => { openingSettled = true; return { error }; });
+  try {
+    await preparationStarted;
+    // A rejected duplicate must not replace the first admitted startup owner.
+    await expect(transport.request("thread/start", { cwd: root, dynamicTools: [] }))
+      .rejects.toThrow("PRP provider thread is already started");
+    controller.abort(cancelled);
+    await new Promise<void>(resolve => setImmediate(resolve));
+    expect.soft(closeOperation).toBeDefined();
+    expect.soft(closeSettled).toBe(false);
+    expect.soft(openingSettled).toBe(false);
+    releasePreparation();
+    const outcome = await opening;
+    await closeOperation;
+    await bootstrapOperation?.catch(() => undefined);
+    expect.soft(preparationContinuedAfterClose).toBe(false);
+    expect.soft(registration.mock.calls.length).toBe(0);
+    expect.soft(launch.mock.calls.length).toBe(0);
+    expect.soft(outcome).toHaveProperty("error");
+    expect.soft(outcome).toHaveProperty("error", cancelled);
+  } finally {
+    releasePreparation();
+    await opening;
+    await bootstrapOperation?.catch(() => undefined);
+    await transport.close().catch(() => undefined);
+    requestSpy.mockRestore();
+    closeSpy.mockRestore();
+    prepare.mockRestore();
+    await rm(root, { recursive: true, force: true });
+  }
+});
+
 it("rejects remote Codex without a guest executable before resolving controller dependencies", async () => {
   const root = await mkdtemp(join(tmpdir(), "paperclip-runner-remote-codex-command-"));
   const runnerBinary = join(root, "runnerd");
@@ -8009,6 +8125,41 @@ it("keeps an adopted runner alive when the detached controller finalizer closes"
 
 it("adopts an opening session without a checkpoint instead of bootstrapping a duplicate provider", () => verifyLiveRunnerAdoption(false, false, false, false, true), 30_000);
 
+it("cancels startup readiness before releasing the route that settles its ready callback", async () => {
+  const root = await mkdtemp(join(tmpdir(), "runnerd-ready-release-cycle-"));
+  let releaseReady!: () => void;
+  const readyReleased = new Promise<void>(resolve => { releaseReady = resolve; });
+  let markReadyStarted!: () => void;
+  const readyStarted = new Promise<void>(resolve => { markReadyStarted = resolve; });
+  const release = vi.fn(async () => { releaseReady(); });
+  let core!: DurablePrpControlPlane;
+  const bundle = createCapabilityRunnerdCodexTransport({
+    runnerBinary: defaultCapabilityRunnerdBinary(), codexCommand: fakeCodex,
+    codexArgs: fakeCodexArgs(root), stateDirectory: root, sourceCodexHome: "", environment: {}, closeGraceMs: 2_000,
+    controlPlaneRegistration: async authority => {
+      core = authority;
+      await authority.start();
+      return { ready: () => { markReadyStarted(); return readyReleased; }, release };
+    },
+  });
+  const opening = bundle.transport.request("thread/start", { cwd: root, dynamicTools: [] });
+  void opening.catch(() => undefined);
+  try {
+    await readyStarted;
+    await vi.waitFor(() => expect(core.store.state.commands.find(command => command.type === "session.open")?.status).toBe("completed"));
+    await expect(bundle.transport.close("cancel pending ingress authentication")).resolves.toBeUndefined();
+    await expect(opening).rejects.toThrow(/closed/);
+    expect(release).toHaveBeenCalledOnce();
+    expect(bundle.evidence().runnerExited).toBe(true);
+    expect(bundle.evidence().diagnostics.join("\n")).not.toContain("startup cleanup is unconfirmed");
+  } finally {
+    releaseReady();
+    await opening.catch(() => undefined);
+    await bundle.transport.close().catch(() => undefined);
+    await rm(root, { recursive: true, force: true });
+  }
+}, 30_000);
+
 it("surfaces a runner exit while provider-ingress readiness is still pending", async () => {
   const neverReady = new Promise<void>(() => undefined);
   const bundle = createCapabilityRunnerdCodexTransport({

packages/paperclip-runner/src/live/runnerd-codex-transport.ts

@@ -3601,6 +3601,8 @@ class DurablePrpCodexTransport implements CodexAppServerTransport {
   #authorizedTools: Record<string, unknown> | null = null;
   #runAttachTemplate: Record<string, unknown> | null = null;
   #closed = false;
+  readonly #closedSignal: Promise<void>;
+  #resolveClosedSignal!: () => void;
   #closePromise: Promise<void> | null = null;
   #startupOperation: Promise<unknown> | null = null;
   #startupDrainTimedOut = false;
@@ -3641,6 +3643,9 @@ class DurablePrpCodexTransport implements CodexAppServerTransport {
     this.#failureSignal = new Promise<never>((_resolve, reject) => {
       this.#rejectFailureSignal = reject;
     });
+    this.#closedSignal = new Promise<void>(resolve => {
+      this.#resolveClosedSignal = resolve;
+    });
     // Failure is also observed by request/notification paths. Register an
     // internal handler so a process exit after the owner has closed the
     // session cannot become an unhandled process-level rejection.
@@ -3717,7 +3722,7 @@ class DurablePrpCodexTransport implements CodexAppServerTransport {
       throw new Error("native_runner_warm_transition_completion_pending");
     }
     if (method === "initialize") return { user: {} };
-    if (method === "thread/start") return this.#trackStartup(this.#start(params));
+    if (method === "thread/start") return this.#trackStartup(() => this.#start(params));
     if (method === "collaborationMode/list") {
       // runnerd negotiates the real Codex preset or the provider-proxy-owned
       // planning contract during session.open. This transport-level mask
@@ -3816,8 +3821,10 @@ class DurablePrpCodexTransport implements CodexAppServerTransport {
     }
     if (method === "thread/read") {
       if (this.#core === null) {
-        this.#recoveryTurnBindingPending = true;
-        await this.#trackStartup(this.#resume());
+        await this.#trackStartup(() => {
+          this.#recoveryTurnBindingPending = true;
+          return this.#resume();
+        });
       }
       // Ask the authenticated runner for its live provider snapshot rather
       // than reading its filesystem. This both supports remote process owners
@@ -4431,6 +4438,7 @@ class DurablePrpCodexTransport implements CodexAppServerTransport {
     if (this.#closed) return;
     this.#controllerDetachedForRestart = true;
     this.#closed = true;
+    this.#resolveClosedSignal();
     this.#turnStartAdmission?.resolve(false);
     if (this.#pump !== null) clearInterval(this.#pump);
     this.#pump = null;
@@ -4457,7 +4465,16 @@ class DurablePrpCodexTransport implements CodexAppServerTransport {
     );
   }
 
-  #trackStartup<T>(operation: Promise<T>): Promise<T> {
+  #trackStartup<T>(start: () => Promise<T>): Promise<T> {
+    // Admit one owner before invoking startup. A duplicate request's rejection
+    // must never replace the preparation that close is responsible for joining.
+    if (this.#startupOperation !== null) {
+      return Promise.reject(new Error("PRP provider thread is already started"));
+    }
+    const operation = Promise.resolve().then(() => {
+      this.#assertStartupOpen();
+      return start();
+    });
     this.#startupOperation = operation;
     return operation;
   }
@@ -4468,6 +4485,7 @@ class DurablePrpCodexTransport implements CodexAppServerTransport {
 
   async #closeOnce(): Promise<void> {
     this.#closed = true;
+    this.#resolveClosedSignal();
     const { preparationDeadline, closeDeadline } = runnerCloseDeadlines(Date.now(), runnerCloseGraceMs(this.options));
     let startupConfirmed = true;
     if (this.#startupOperation !== null) {
@@ -5598,6 +5616,7 @@ class DurablePrpCodexTransport implements CodexAppServerTransport {
     >;
     let oldTransitionRegistration: RecoveryRegistration | null = null;
     let newTransitionRegistration: RecoveryRegistration | null = null;
+    this.#assertStartupOpen();
     if (warmRecovery && this.options.controlPlaneRegistration) {
       try {
         oldTransitionRegistration = await this.options.controlPlaneRegistration(
@@ -5616,6 +5635,7 @@ class DurablePrpCodexTransport implements CodexAppServerTransport {
             "native_runner_warm_transition_registered_endpoint_mismatch",
           );
         }
+        this.#assertStartupOpen();
         newTransitionRegistration = await this.options.controlPlaneRegistration(
           core,
           warmRecovery.proof.receipt.newIdentity,
@@ -5691,6 +5711,7 @@ class DurablePrpCodexTransport implements CodexAppServerTransport {
       await releaseMaterializedNativeRuntimeSkills(
         resolve(localCodexHome, "skills"),
       );
+      this.#assertStartupOpen();
       await prepareIsolatedCodexHome({
         context: sourceRuntimeContext,
         codexHome: localCodexHome,
@@ -5769,10 +5790,13 @@ class DurablePrpCodexTransport implements CodexAppServerTransport {
       this.#watchRunner(handle);
       await this.#publishSpawnedProcess(handle);
     }
+    this.#assertStartupOpen();
     if (oldTransitionRegistration && newTransitionRegistration) {
       await oldTransitionRegistration.activate?.();
+      this.#assertStartupOpen();
       await newTransitionRegistration.activate?.();
     } else await registration?.activate?.();
+    this.#assertStartupOpen();
     if (registration?.failure) {
       void registration.failure.catch((error: unknown) => {
         this.#failTransport(
@@ -5781,6 +5805,7 @@ class DurablePrpCodexTransport implements CodexAppServerTransport {
       });
     }
     if (!adoptedRunner) await this.#awaitRegistrationReady(registration?.ready);
+    this.#assertStartupOpen();
     if (adoptedRunner) {
       this.#evidence.runnerPid = adoptedRunner.pid;
       this.#evidence.runnerProcessGroupId = adoptedRunner.processGroupId;
@@ -5797,6 +5822,7 @@ class DurablePrpCodexTransport implements CodexAppServerTransport {
         !recoveryIdentityMatches(core.store.state.identity, desiredIdentity) ||
         core.store.state.warmTransition !== undefined
       ) {
+        this.#assertStartupOpen();
         if (Date.now() >= deadline || (await this.#runnerHasExited())) {
           throw new Error("native_runner_warm_transition_recovery_pending");
         }
@@ -5811,11 +5837,13 @@ class DurablePrpCodexTransport implements CodexAppServerTransport {
       this.#deferredTurnStartEvents = [];
       if (oldTransitionRegistration && newTransitionRegistration) {
         await oldTransitionRegistration.release();
+        this.#assertStartupOpen();
         this.#controlPlaneRelease = newTransitionRegistration.release;
         this.#controlPlaneCheckpoint =
           newTransitionRegistration.checkpoint ?? null;
       }
     }
+    this.#assertStartupOpen();
     this.#pump = setInterval(() => this.#pumpEventsSafely(), 5);
     if (adoptedRunner) {
       await this.#awaitAdoptedRunnerConnection(
@@ -6855,8 +6883,11 @@ class DurablePrpCodexTransport implements CodexAppServerTransport {
       await awaitAdoptedRunnerAuthentication({
         activeConnectionCount: () => core.activeRunnerConnectionCount(),
         isAlive: () => adoptedRunner.isAlive(),
-        throwIfFailed: () => this.#throwIfFailed(),
-        failure: this.#failureSignal,
+        throwIfFailed: () => { this.#assertStartupOpen(); this.#throwIfFailed(); },
+        failure: Promise.race([
+          this.#failureSignal,
+          this.#closedSignal.then(() => { throw new Error("runnerd transport closed during provider startup"); }),
+        ]),
         ready,
         timeoutMs: this.options.runnerReconnectGraceMs ?? 30_000,
       });
@@ -6865,6 +6896,7 @@ class DurablePrpCodexTransport implements CodexAppServerTransport {
       this.#failTransport(failure);
       throw failure;
     }
+    this.#assertStartupOpen();
     this.#adoptedRunnerAuthenticated = true;
     this.#diagnostic(
       `adopted runner ${adoptedRunner.pid} authenticated to its durable PRP authority`,
@@ -7069,11 +7101,18 @@ class DurablePrpCodexTransport implements CodexAppServerTransport {
   async #awaitRegistrationReady(
     ready: (() => Promise<void>) | undefined,
   ): Promise<void> {
+    this.#assertStartupOpen();
     if (ready === undefined) {
       this.#throwIfFailed();
       return;
     }
-    await Promise.race([ready(), this.#failureSignal]);
+    await Promise.race([
+      ready(), this.#failureSignal,
+      // Readiness is a notification wait, not launch-material preparation.
+      // Its route owner is released by close; joining it first would cycle.
+      this.#closedSignal.then(() => { this.#assertStartupOpen(); }),
+    ]);
+    this.#assertStartupOpen();
     this.#throwIfFailed();
   }