diff --git a/.agents/notes/implemented/architecture/2026-07-28-portable-execution-world-consumers.i18n.yaml b/.agents/notes/implemented/architecture/2026-07-28-portable-execution-world-consumers.i18n.yaml
index a7eaaa2e3a..683a095229 100644
--- a/.agents/notes/implemented/architecture/2026-07-28-portable-execution-world-consumers.i18n.yaml
+++ b/.agents/notes/implemented/architecture/2026-07-28-portable-execution-world-consumers.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write .agents/notes/implemented/architecture/2026-07-28-portable-execution-world-consumers.md
-2026-07-28-portable-execution-world-consumers.md: 260f38981ea0cd034f506594057483c6ccfa9617
-2026-07-28-portable-execution-world-consumers.zh.md: 0bf7b4dd1a87378b76f6a71343a8cb78766b7b3a
+2026-07-28-portable-execution-world-consumers.md: 03b274688e15661845c326afdd105b342dd6a513
+2026-07-28-portable-execution-world-consumers.zh.md: 1e3d8ae8e46d26f4bea47293104c52dbf33098d4
diff --git a/.agents/notes/implemented/architecture/2026-07-28-portable-execution-world-consumers.md b/.agents/notes/implemented/architecture/2026-07-28-portable-execution-world-consumers.md
index 260f38981e..03b274688e 100644
--- a/.agents/notes/implemented/architecture/2026-07-28-portable-execution-world-consumers.md
+++ b/.agents/notes/implemented/architecture/2026-07-28-portable-execution-world-consumers.md
@@ -16,13 +16,13 @@ Ordinary pipes do not cover one requirement. A persistent terminal needs PTY all
 
 The filesystem interface owns the path facts that another capability needs without exposing its opaque target identity: a canonical process path, canonical `file:` URI, and containment. Existing whole and streaming text operations remain filesystem-owned; protocol consumers enforce their own retention limits while consuming the stream.
 
-The subprocess interface owns the process coordinates and primitives: canonical cwd, private runtime storage, executable lookup, ordinary raw or collected process spawning, and `spawnTerminal()`. The terminal operation is one deep primitive whose handle owns text I/O, foreground groups, signalling, and one awaited TERM-to-KILL operation that settles in-flight handle calls and reaches whole-session quiescence. Its signal cancels allocation only; the published handle owns its lifetime. Prompt detection, idle inference, scrollback, sandbox policy, and owner lifecycle remain in the PTY consumer.
+The subprocess interface owns the process coordinates and primitives: canonical cwd, private runtime storage, executable lookup, ordinary raw or collected process spawning, and `spawnTerminal()`. The terminal operation is one deep primitive whose handle owns text I/O, foreground groups, signalling, and one awaited TERM-to-KILL operation that settles in-flight handle calls and reaches quiescence for every session member the provider can still observe. Its signal cancels allocation only; the published handle owns its lifetime. Prompt detection, idle inference, scrollback, sandbox policy, and owner lifecycle remain in the PTY consumer.
 
 Generic consumers use that execution world:
 
 - `dsh-bash-local` continues to map Bash semantics onto ordinary `ctx.subprocess.spawn()`.
 - `dsh-lsp-local` reads and contains source through `ctx.fs`, resolves and launches language servers through `ctx.subprocess`, and carries provider-owned file URIs through initialization and result rendering. One provider-lifetime signal aborts filesystem and protocol work during disposal, including workspace lookup before queue ownership; its JSON-RPC, pooling, synchronization, and normalization stay unchanged.
-- `dsh-pty-local` maps persistent-shell semantics onto `ctx.subprocess.spawnTerminal()`. The local `node-pty` and process-inspection implementation moves into `dsh-subprocess-local`; another subprocess provider supplies the same primitive. `danger-full-access` needs no `ctx.sandbox`; a confined mode requires a same-world sandbox provider and fails before spawn when none is mounted. Prompt and silence evidence collected during asynchronous pre-write inspection is discarded when the provider write begins. Cancellation retains the send reservation while an in-flight write settles and then signals the foreground group, so late bytes or the signal cannot target a successor; a rejected write sends no signal. The absolute deadline remains armed throughout cancellation. A signal failure becomes terminal transport failure. Completion of a stale inspection resumes polling for the current send. Close rejects new public signals and delegates complete-session quiescence to the handle's awaited termination operation.
+- `dsh-pty-local` maps persistent-shell semantics onto `ctx.subprocess.spawnTerminal()`. The local `node-pty` and process-inspection implementation moves into `dsh-subprocess-local`; another subprocess provider supplies the same primitive. `danger-full-access` needs no `ctx.sandbox`; a confined mode requires a same-world sandbox provider and fails before spawn when none is mounted. Prompt and silence evidence collected during asynchronous pre-write inspection is discarded when the provider write begins. Cancellation retains the send reservation while an in-flight write settles and then signals the foreground group, so late bytes or the signal cannot target a successor; an in-flight readiness poll cannot release that reservation, and a rejected write sends no signal. The absolute deadline remains armed throughout cancellation. A signal failure becomes terminal transport failure. Completion of a stale inspection resumes polling for the current send. Startup cancellation begins terminal rollback without waiting for a stalled readiness or signalling call. Close rejects new public signals and delegates provider-observable session quiescence to the handle's awaited termination operation.
 - `dsh-code-runtime-subprocess` materializes a dependency-free runner through `ctx.fs` and launches it through `ctx.subprocess`, preserving the Code Runtime binding and output contract across local or remote worlds. The fixed runner is adapter-owned infrastructure below `ctx.subprocess.runtimeRoot`, so its write carries an explicit `danger-full-access` policy instead of inheriting the model-facing filesystem mode. It shares host-side worker mechanics through the non-plugin `dsh-code-runtime-worker/runtime-host` subpath instead of copying them. Preparation carries one lifecycle signal through filesystem resolution, materialization, and executable lookup so disposal can abort a stalled provider. The heap-bounded worker rejects oversized binding frames before transfer, each outer hop enforces the same bound before forwarding, and raw subprocess pipes carry newline-delimited UTF-8 JSON without a redundant base64 representation. The launcher publishes an accepted terminal frame before reaping its controller so a descendant that inherits controller pipes cannot suppress completion; the host still awaits process-group quiescence.
 
 `dsh-code-runtime-worker` remains a separate implementation. It is the smaller in-process backend and works in single-file distributions that cannot assume an installed Node executable. Remote filesystem/process compositions select `dsh-code-runtime-subprocess`; they do not need a provider-specific Code Runtime package.
diff --git a/.agents/notes/implemented/architecture/2026-07-28-portable-execution-world-consumers.zh.md b/.agents/notes/implemented/architecture/2026-07-28-portable-execution-world-consumers.zh.md
index 0bf7b4dd1a..1e3d8ae8e4 100644
--- a/.agents/notes/implemented/architecture/2026-07-28-portable-execution-world-consumers.zh.md
+++ b/.agents/notes/implemented/architecture/2026-07-28-portable-execution-world-consumers.zh.md
@@ -16,13 +16,13 @@ Status: implemented
 
 文件系统接口负责其他能力需要的路径事实，同时不公开其不透明目标身份：规范化进程路径、规范化 `file:` URI 和包含关系。现有完整文本与流式文本操作仍归文件系统负责；协议消费方在消费流时执行各自的保留上限。
 
-进程管理接口负责进程运行坐标与原语：规范化 cwd、私有运行时存储、可执行文件查找、以原始或收集模式 spawn 普通进程，以及 `spawnTerminal()`。终端操作是一项深层原语，其句柄负责文本 I/O、前台进程组、信号发送，以及一项须等待的 TERM→KILL 操作；该操作会结算所有在途句柄调用，并使整个会话完全停稳。其信号只取消分配；句柄一经发布，便负责自身生命周期。提示符检测、空闲推断、scrollback、沙箱策略和所有者生命周期仍由 PTY 消费方负责。
+进程管理接口负责进程运行坐标与原语：规范化 cwd、私有运行时存储、可执行文件查找、以原始或收集模式 spawn 普通进程，以及 `spawnTerminal()`。终端操作是一项深层原语，其句柄负责文本 I/O、前台进程组、信号发送，以及一项须等待的 TERM→KILL 操作；该操作会结算所有在途句柄调用，并使提供方仍可观察到的每个会话成员完全停稳。其信号只取消分配；句柄一经发布，便负责自身生命周期。提示符检测、空闲推断、scrollback、沙箱策略和所有者生命周期仍由 PTY 消费方负责。
 
 通用消费方使用该执行世界：
 
 - `dsh-bash-local` 继续把 Bash 语义映射到普通的 `ctx.subprocess.spawn()`。
 - `dsh-lsp-local` 通过 `ctx.fs` 读取源文件并验证包含关系，通过 `ctx.subprocess` 解析和启动语言服务器，并让由提供方负责的文件 URI 贯穿初始化与结果渲染。一个提供方生命周期信号会在资源释放期间中止文件系统与协议操作，包括取得队列所有权之前的工作区查找；其 JSON-RPC、池化、同步和规范化保持不变。
-- `dsh-pty-local` 把持久 shell 语义映射到 `ctx.subprocess.spawnTerminal()`。本地 `node-pty` 与进程检查实现移入 `dsh-subprocess-local`；其他进程管理提供方则提供相同原语。`danger-full-access` 不需要 `ctx.sandbox`；受限模式要求同一执行世界中存在沙箱提供方，未挂载时会在 spawn 前失败。提供方开始写入时，系统会丢弃异步写入前检查期间收集的提示符与静默证据。取消会在在途写入结算期间保留发送预留，随后向前台进程组发送信号，因此延迟字节和该信号都无法落到后续发送；写入被拒绝时不会发送信号。绝对截止时间会在整个取消期间保持启用。信号发送失败会成为终结性传输失败。陈旧检查完成后，会针对当前发送恢复轮询。关闭操作会拒绝新的公开信号，并把完整会话的完全停稳委托给句柄上须等待的终止操作。
+- `dsh-pty-local` 把持久 shell 语义映射到 `ctx.subprocess.spawnTerminal()`。本地 `node-pty` 与进程检查实现移入 `dsh-subprocess-local`；其他进程管理提供方则提供相同原语。`danger-full-access` 不需要 `ctx.sandbox`；受限模式要求同一执行世界中存在沙箱提供方，未挂载时会在 spawn 前失败。提供方开始写入时，系统会丢弃异步写入前检查期间收集的提示符与静默证据。取消会在在途写入结算期间保留发送预留，随后向前台进程组发送信号，因此延迟字节和该信号都无法落到后续发送；在途就绪检查无法释放该预留，写入被拒绝时也不会发送信号。绝对截止时间会在整个取消期间保持启用。信号发送失败会成为终结性传输失败。陈旧检查完成后，会针对当前发送恢复轮询。启动取消会立即开始终端回滚，而不等待停滞的就绪检查或信号发送调用。关闭操作会拒绝新的公开信号，并把提供方可观察会话成员的完全停稳委托给句柄上须等待的终止操作。
 - `dsh-code-runtime-subprocess` 通过 `ctx.fs` 物化无依赖 runner，并通过 `ctx.subprocess` 启动它，从而在本地或远程执行世界中保留代码运行时的绑定与输出契约。固定 runner 是位于 `ctx.subprocess.runtimeRoot` 下的适配器自有基础设施，因此其写入携带显式 `danger-full-access` 策略，而不继承面向模型的文件系统模式。它通过非插件子路径 `dsh-code-runtime-worker/runtime-host` 共享宿主侧 worker 机制，而不是复制这些机制。准备阶段让同一个生命周期信号贯穿文件系统解析、物化和可执行文件查找，使资源释放能够中止停滞的提供方操作。受堆上限约束的 worker 会在传输前拒绝过大的绑定帧；每个外层转发环节都会在转发前执行相同的上限检查；原始子进程管道承载以换行符分隔的 UTF-8 JSON，无需冗余的 base64 表示；launcher 会在回收 controller 前发布已接纳的终态帧，使继承 controller 管道的后代进程无法阻止完成；宿主仍会等待进程组完全停稳。
 
 `dsh-code-runtime-worker` 仍是独立实现。它是较小的进程内后端，可用于无法假定已安装 Node 可执行文件的单文件分发。远程文件系统／进程组合选择 `dsh-code-runtime-subprocess`；它们不需要提供方专用的代码运行时包。
diff --git a/docs/core-data-structures/subprocess.i18n.yaml b/docs/core-data-structures/subprocess.i18n.yaml
index 7cba3857bb..f3b308b0be 100644
--- a/docs/core-data-structures/subprocess.i18n.yaml
+++ b/docs/core-data-structures/subprocess.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write docs/core-data-structures/subprocess.md
-subprocess.md: 89c75aea3393a000612e3b8f87d263c7b4fa7c60
-subprocess.zh.md: 83fb44f4750ba31db1f4336c0c293eb9e236be22
+subprocess.md: 95e9454a75112cf98e1ed583f970c50fe90aac37
+subprocess.zh.md: 58127d662fa599d19f632449d42b8aa3259886d6
diff --git a/docs/core-data-structures/subprocess.md b/docs/core-data-structures/subprocess.md
index d6e0105c59..935a7d60ac 100644
--- a/docs/core-data-structures/subprocess.md
+++ b/docs/core-data-structures/subprocess.md
@@ -240,7 +240,7 @@ interface SubprocessOutcome {
 
 ## Terminal-process primitive
 
-`spawnTerminal(spec)` is the non-pipe process primitive. The provider allocates the controlling terminal and owns UTF-8 text transport, foreground-process-group inspection and signalling, and one awaited TERM-to-KILL operation that reaches whole-session quiescence. The PTY backend remains responsible for prompt detection, readiness inference, scrollback, sandbox policy, and persistent-session ownership; ordinary `spawn()` cannot reconstruct controlling-terminal semantics.
+`spawnTerminal(spec)` is the non-pipe process primitive. The provider allocates the controlling terminal and owns UTF-8 text transport, foreground-process-group inspection and signalling, and one awaited TERM-to-KILL operation that reaches quiescence for every session member the provider can still observe; providers document substrate-specific observability limits. The PTY backend remains responsible for prompt detection, readiness inference, scrollback, sandbox policy, and persistent-session ownership; ordinary `spawn()` cannot reconstruct controlling-terminal semantics.
 
 The terminal spec fully specifies argv, cwd, environment overrides, dimensions, cleanup grace, and optional allocation cancellation. Its handle exposes `pid`, ordered output, `done`, `write`, `inspectForeground`, `signalForeground`, and awaited `terminate`; the exact public shapes are generated into the [`ctx.subprocess` service catalog](../cordis-catalog/services.md#ctxsubprocess--subprocessservice-abstract-seam).
 
diff --git a/docs/core-data-structures/subprocess.zh.md b/docs/core-data-structures/subprocess.zh.md
index 83fb44f475..58127d662f 100644
--- a/docs/core-data-structures/subprocess.zh.md
+++ b/docs/core-data-structures/subprocess.zh.md
@@ -240,7 +240,7 @@ interface SubprocessOutcome {
 
 ## 终端进程原语
 
-`spawnTerminal(spec)` 是非管道进程原语。提供方分配控制终端，并负责 UTF-8 文本传输、前台进程组检查与信号发送，以及一项须等待的 TERM→KILL 操作；该操作会使整个会话完全停稳。PTY 后端仍负责提示符检测、就绪推断、scrollback、沙箱策略和持久会话所有权；普通 `spawn()` 无法重建控制终端语义。
+`spawnTerminal(spec)` 是非管道进程原语。提供方分配控制终端，并负责 UTF-8 文本传输、前台进程组检查与信号发送，以及一项须等待的 TERM→KILL 操作；该操作会使提供方仍可观察到的每个会话成员完全停稳，提供方则会记录执行基底特有的可观察性限制。PTY 后端仍负责提示符检测、就绪推断、scrollback、沙箱策略和持久会话所有权；普通 `spawn()` 无法重建控制终端语义。
 
 终端 spec 完全指定 argv、cwd、环境覆盖、尺寸、清理宽限期与可选的分配取消。其句柄公开 `pid`、有序输出、`done`、`write`、`inspectForeground`、`signalForeground` 和须等待的 `terminate`；确切的公共形状生成到 [`ctx.subprocess` 服务目录](../cordis-catalog/services.md#ctxsubprocess--subprocessservice-abstract-seam)中。
 
diff --git a/packages/pty/pty-local/src/index.ts b/packages/pty/pty-local/src/index.ts
index 1fa3357002..f91db5d386 100644
--- a/packages/pty/pty-local/src/index.ts
+++ b/packages/pty/pty-local/src/index.ts
@@ -82,6 +82,22 @@ function spawnArgv(ctx: Context, config: ResolvedConfig, spec: PtyBackendSpawnSp
   }).argv
 }
 
+async function initializeSession(session: LocalPtySession, signal?: AbortSignal): Promise<void> {
+  if (signal === undefined) {
+    await session.initialize(signal)
+    return
+  }
+  const aborted = Promise.withResolvers<never>()
+  const onAbort = (): void => { aborted.reject(signal.reason) }
+  signal.addEventListener('abort', onAbort, { once: true })
+  try {
+    signal.throwIfAborted()
+    await Promise.race([session.initialize(signal), aborted.promise])
+  } finally {
+    signal.removeEventListener('abort', onAbort)
+  }
+}
+
 /** Local shell backend registered under the configured type. */
 export class LocalPtyBackend implements PtyBackend {
   readonly type: string
@@ -116,7 +132,7 @@ export class LocalPtyBackend implements PtyBackend {
     })
     const session = this.createSession(terminal, this.config)
     try {
-      await session.initialize(spec.signal)
+      await initializeSession(session, spec.signal)
       return session
     } catch (error) {
       try {
diff --git a/packages/pty/pty-local/src/session.ts b/packages/pty/pty-local/src/session.ts
index 5517cd902d..ebd7e076cf 100644
--- a/packages/pty/pty-local/src/session.ts
+++ b/packages/pty/pty-local/src/session.ts
@@ -6,6 +6,7 @@ import type {
   SubprocessTerminalForeground,
   SubprocessTerminalHandle,
 } from '@deepseek-ai/dsh-subprocess'
+import { PtyError } from '@deepseek-ai/dsh-pty'
 import type {
   PtyBackendSession,
   PtyReadRequest,
@@ -219,7 +220,7 @@ export class LocalPtySession implements PtyBackendSession {
   startSend(request: PtySendRequest): PtySendOperation {
     if (this.closing) throw new Error('PTY session is closing')
     if (this.statusValue.kind === 'exited') throw new Error('PTY session has exited')
-    if (this.active !== undefined) throw new Error('PTY session already has an active send')
+    if (this.active !== undefined) throw new PtyError('PTY session already has an active send or draining provider operation', 'SEND_ACTIVE')
     if (request.signal?.aborted === true) throw new Error('PTY send aborted before write')
 
     const operation = new LocalSendOperation(
@@ -247,7 +248,7 @@ export class LocalPtySession implements PtyBackendSession {
   private async beginSend(operation: LocalSendOperation, request: PtySendRequest): Promise<void> {
     try {
       const foreground = await this.terminal.inspectForeground()
-      if (this.active !== operation || this.closing) return
+      if (this.active !== operation || this.closing || this.interrupting === operation) return
       operation.setInitialForeground(foreground)
       const input = `${request.text}${request.submit ? '\r' : ''}`
       if (input.length > 0 && !operation.cancelRequested) {
diff --git a/packages/pty/pty-local/tests/index.spec.ts b/packages/pty/pty-local/tests/index.spec.ts
index 9206dd89ef..f59cd3ab5a 100644
--- a/packages/pty/pty-local/tests/index.spec.ts
+++ b/packages/pty/pty-local/tests/index.spec.ts
@@ -143,6 +143,32 @@ describe('LocalPtyBackend startup rollback', () => {
     } satisfies Partial<PtyBackendCleanupError>))
   })
 
+  it('starts startup rollback when cancellation wins a stalled initialization', async () => {
+    const ctx = new Context()
+    await ctx.plugin(SandboxPolicyService, { mode: 'danger-full-access', workspaceRoot: '/tmp' })
+    const initialization = Promise.withResolvers<undefined>()
+    const initializationStarted = Promise.withResolvers<undefined>()
+    const close = vi.fn<() => Promise<void>>().mockResolvedValue(undefined)
+    const session = {
+      initialize: () => {
+        initializationStarted.resolve(undefined)
+        return initialization.promise
+      },
+      close,
+    } as unknown as LocalPtySession
+    const backend = new LocalPtyBackend(ctx, config(), async () => terminalHandle(), () => session)
+    const controller = new AbortController()
+    const reason = new Error('cancel stalled startup')
+
+    const spawning = backend.spawn(spec(agent(ctx), controller.signal))
+    await initializationStarted.promise
+    controller.abort(reason)
+
+    await expect(spawning).rejects.toBe(reason)
+    expect(close).toHaveBeenCalledWith('PTY startup failed')
+    initialization.resolve(undefined)
+  })
+
   it('wraps confined argv, scrubs the environment, and returns initialized sessions', async () => {
     const ctx = new Context()
     await ctx.plugin(RecordingSandbox)
diff --git a/packages/pty/pty-local/tests/session.spec.ts b/packages/pty/pty-local/tests/session.spec.ts
index fbe0aa807b..8d11f8e6f4 100644
--- a/packages/pty/pty-local/tests/session.spec.ts
+++ b/packages/pty/pty-local/tests/session.spec.ts
@@ -8,6 +8,7 @@ import type {
   SubprocessTerminalHandle,
   SubprocessTerminalSignal,
 } from '@deepseek-ai/dsh-subprocess'
+import { PtyError } from '@deepseek-ai/dsh-pty'
 import type {
   ProcessIdentity,
   ProcessInspector,
@@ -374,6 +375,54 @@ describe('LocalPtySession readiness and output', () => {
     expect(inspector.groups).not.toContainEqual([789, 'SIGINT'])
   })
 
+  it('does not let an in-flight readiness inspection release a canceled send before signalling settles', async () => {
+    vi.useFakeTimers()
+    const terminal = new FakeTerminal()
+    const inspector = new FakeInspector()
+    const session = makeSession(terminal, inspector, config())
+    await initialize(session, terminal)
+
+    const readiness = Promise.withResolvers<{ processGroupId: number; inputWaiting: boolean }>()
+    let inspections = 0
+    terminal.inspectForeground = async () => {
+      inspections += 1
+      if (inspections === 1) return { processGroupId: 456, inputWaiting: false }
+      if (inspections === 2) return await readiness.promise
+      return { processGroupId: 456, inputWaiting: true }
+    }
+    const signalling = Promise.withResolvers<undefined>()
+    const signalled = Promise.withResolvers<number>()
+    terminal.signalForeground = async (signal) => {
+      await signalling.promise
+      const foreground = await terminal.inspectForeground()
+      if (foreground === undefined) throw new Error('cannot resolve foreground')
+      inspector.signalGroup(foreground.processGroupId, signal)
+      signalled.resolve(foreground.processGroupId)
+      return foreground.processGroupId
+    }
+
+    const operation = session.startSend({ text: 'first', submit: true })
+    await Promise.resolve()
+    await Promise.resolve()
+    await vi.advanceTimersByTimeAsync(10)
+    expect(inspections).toBe(2)
+    expect(operation.cancel()).toBe(true)
+    let settled = false
+    void operation.done.then(() => { settled = true })
+
+    readiness.resolve({ processGroupId: 456, inputWaiting: true })
+    await Promise.resolve()
+    await Promise.resolve()
+    expect(settled).toBe(false)
+    expect(() => session.startSend({ text: 'successor', submit: true })).toThrow(PtyError)
+
+    signalling.resolve(undefined)
+    expect(await signalled.promise).toBe(456)
+    expect(inspector.groups).toContainEqual([456, 'SIGINT'])
+    await session.close('test complete')
+    expect((await operation.done).waitReason).toBe('session_exit')
+  })
+
   it('signals only after an in-flight provider write lands', async () => {
     vi.useFakeTimers()
     const terminal = new FakeTerminal()
@@ -438,7 +487,9 @@ describe('LocalPtySession readiness and output', () => {
     await vi.advanceTimersByTimeAsync(100)
 
     expect((await operation.done).waitReason).toBe('timeout')
-    expect(() => session.startSend({ text: 'must wait', submit: true })).toThrow('active send')
+    expect(() => session.startSend({ text: 'must wait', submit: true })).toThrow(expect.objectContaining({
+      code: 'SEND_ACTIVE',
+    }))
 
     writeGate.resolve(undefined)
     await vi.advanceTimersByTimeAsync(0)
diff --git a/packages/subprocess/README.i18n.yaml b/packages/subprocess/README.i18n.yaml
index 256d4ad2d9..f6de20e259 100644
--- a/packages/subprocess/README.i18n.yaml
+++ b/packages/subprocess/README.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/subprocess/README.md
-README.md: c4bb1da1a172b05afa63834db4e5b1fa974baabb
-README.zh.md: f68bc1c720eeb5282bb9c94c951524a021e38b2f
+README.md: b4aaf78454a51af4d3f7ea9f1aef450fde8d729d
+README.zh.md: c5013ce19bacb582b6c8c93e0ea0a73ec776ee57
diff --git a/packages/subprocess/README.md b/packages/subprocess/README.md
index c4bb1da1a1..b4aaf78454 100644
--- a/packages/subprocess/README.md
+++ b/packages/subprocess/README.md
@@ -2,7 +2,7 @@
 
 English | [中文](README.zh.md)
 
-The shared process substrate for one execution world: canonical cwd/runtime storage, executable lookup, fully-specified managed child-process trees with raw or collected stdio, and one deep terminal-process primitive that owns PTY allocation, foreground groups, and complete session cleanup. Command defaulting, shell semantics, deadlines, protocol framing, readiness, and presentation stay with consumers — the [bash executors](../bash/README.md), [LSP host](../lsp/README.md), [PTY shell backend](../pty/README.md), [subprocess code runtime](../code-runtime/code-runtime-subprocess/README.md), and [ACP subagent backend](../subagent/README.md). See the [subprocess seam Agent Note](../../.agents/notes/implemented/architecture/2026-07-26-subprocess-seam.md).
+The shared process substrate for one execution world: canonical cwd/runtime storage, executable lookup, fully-specified managed child-process trees with raw or collected stdio, and one deep terminal-process primitive that owns PTY allocation, foreground groups, and provider-observable session cleanup. Command defaulting, shell semantics, deadlines, protocol framing, readiness, and presentation stay with consumers — the [bash executors](../bash/README.md), [LSP host](../lsp/README.md), [PTY shell backend](../pty/README.md), [subprocess code runtime](../code-runtime/code-runtime-subprocess/README.md), and [ACP subagent backend](../subagent/README.md). See the [subprocess seam Agent Note](../../.agents/notes/implemented/architecture/2026-07-26-subprocess-seam.md).
 
 | Package | ctx key | Role |
 |---|---|---|
diff --git a/packages/subprocess/README.zh.md b/packages/subprocess/README.zh.md
index f68bc1c720..c5013ce19b 100644
--- a/packages/subprocess/README.zh.md
+++ b/packages/subprocess/README.zh.md
@@ -1,12 +1,12 @@
-# subprocess/：进程管理能力家族
+# subprocess/：子进程能力家族
 
 [English](README.md) | 中文
 
-同一执行世界中的共享进程基底：规范化 cwd／运行时存储、可执行文件查找、采用原始或收集式 stdio 的完全显式受管子进程树，以及一项负责 PTY 分配、前台进程组和完整会话清理的深层终端进程原语。命令默认值补全、shell 语义、deadline、协议分帧、就绪检测与呈现留在消费方：[bash 执行器](../bash/README.md)、[LSP 主机](../lsp/README.md)、[PTY shell 后端](../pty/README.md)、[基于进程管理的 Code Runtime](../code-runtime/code-runtime-subprocess/README.md)与 [ACP（Agent Client Protocol）subagent 后端](../subagent/README.md)。参见[进程管理器 seam Agent Note（agent 决策记录）](../../.agents/notes/implemented/architecture/2026-07-26-subprocess-seam.md)。
+这里集中提供一个执行世界的共享进程基底：规范化 cwd／运行时存储、可执行文件查找、具有原始或收集式 stdio 的完整指定受管子进程树，以及一项深层终端进程原语，负责 PTY 分配、前台进程组和提供方仍可观察到的会话成员清理。命令默认值补全、shell 语义、时限、协议分帧、就绪状态与呈现留在消费方：[bash 执行器](../bash/README.md)、[LSP 主机](../lsp/README.md)、[PTY shell 后端](../pty/README.md)、[子进程代码运行时](../code-runtime/code-runtime-subprocess/README.md)与 [ACP（Agent Client Protocol）subagent 后端](../subagent/README.md)。参见[subprocess seam Agent Note（agent 决策记录）](../../.agents/notes/implemented/architecture/2026-07-26-subprocess-seam.md)。
 
 | 包（package） | ctx 键 | 角色 |
 |---|---|---|
 | [`subprocess`](subprocess/README.md)（`@deepseek-ai/dsh-subprocess`） | `ctx.subprocess` | seam 本体：执行世界坐标与可执行文件查找、普通受管 spawn、终端进程原语、句柄生命周期，以及共享的环境／输出词汇 |
 | [`subprocess-local`](subprocess-local/README.md)（`@deepseek-ai/dsh-subprocess-local`） | 无 | 本地实现：detached 进程树、有界收集／spill、`node-pty`、前台／会话检查、进程树信号发送、运行时存储，以及先终止再等待退出的资源释放 |
 
-服务拥有跨消费方重载的进程存续期；消费方拥有一个进程的含义（一条 bash 命令、未来的非 shell 运行器）以及塑造它的每一项默认值。
+即使消费方重载，进程生命周期仍由服务负责管理；消费方负责定义进程的含义（一条 bash 命令、未来的非 shell 运行器），以及决定塑造该进程的每一项默认值。
diff --git a/packages/subprocess/subprocess/README.i18n.yaml b/packages/subprocess/subprocess/README.i18n.yaml
index f8678464a9..92887cc247 100644
--- a/packages/subprocess/subprocess/README.i18n.yaml
+++ b/packages/subprocess/subprocess/README.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/subprocess/subprocess/README.md
-README.md: 2fca5cdd08f3cbd36d8ef492226c91681b5568d0
-README.zh.md: 5830d0fc394160bc557e24646cc76d4bcfead13c
+README.md: 12a88a86c3cd7bcde2858bdbd874c99533100e09
+README.zh.md: f4c265a0f55c4e35e4557516593dd0da236164c5
diff --git a/packages/subprocess/subprocess/README.md b/packages/subprocess/subprocess/README.md
index 2fca5cdd08..12a88a86c3 100644
--- a/packages/subprocess/subprocess/README.md
+++ b/packages/subprocess/subprocess/README.md
@@ -11,7 +11,7 @@ The subprocess seam (`ctx.subprocess`) is the process half of one execution worl
 - The spec is fully explicit — argv, cwd, per-stream stdio dispositions, grace — because deployment-varying defaults belong to the calling seam's config, not to a hidden subprocess-service default (the `dsh-bash` request/spec split is the owning template). `argv` is never shell-interpreted; a consumer that wants a shell passes `['bash', '-c', command]` itself.
 - Stdio is Node-shaped per stream: `'pipe'` hands the caller the raw stream for its own protocol framing (LSP JSON-RPC, ACP ndjson), `'inherit'` passes the parent descriptor through for diagnostics, and collect mode (`{ maxBytes, spill? }`) buffers a bounded tail with an optional full-stream spill file. Collect readers take whole-stream byte offsets and never consume, so independent readers cannot steal one another's deltas; a read whose offset slid out of the in-memory tail is `lossy` and points at the spill file when one exists. Collected output stays readable after settlement.
 - Termination is tree-scoped on every platform (POSIX detached groups with direct-child fallback; Windows `taskkill /T`): `terminate()` — the only termination verb — escalates SIGTERM→grace→SIGKILL (idempotent, driven by the spec's abort signal too, a no-op once the tree is gone), and `waitForExit(signal?)` observes whole-tree liveness so a consumer-owned teardown ladder holds each tier on real quiescence — the manager reacts but never classifies why (callers own deadlines, teardown ladders, and cause classification).
-- `spawnTerminal(spec)` is the only non-pipe primitive. Its handle owns a real PTY, UTF-8 text I/O, foreground-process-group inspection/signalling, and one awaited `terminate()` operation that reaches whole-session quiescence and settles in-flight handle calls. The spec signal cancels allocation only; the published handle owns its lifetime. The output stream ends after queued output when the top-level process exits, and a live transport failure rejects `done`. These operations remain one substrate primitive because ordinary pipes cannot allocate a controlling terminal or clean the complete terminal session; readiness, scrollback, and owner policy remain in the PTY consumer.
+- `spawnTerminal(spec)` is the only non-pipe primitive. Its handle owns a real PTY, UTF-8 text I/O, foreground-process-group inspection/signalling, and one awaited `terminate()` operation that reaches quiescence for every session member the provider can still observe and settles in-flight handle calls; providers document substrate-specific observability limits. The spec signal cancels allocation only; the published handle owns its lifetime. The output stream ends after queued output when the top-level process exits, and a live transport failure rejects `done`. These operations remain one substrate primitive because ordinary pipes cannot allocate a controlling terminal or clean terminal-session members; readiness, scrollback, and owner policy remain in the PTY consumer.
 - `scrubbedParentEnv()` / `SENSITIVE_ENV_PATTERN` are the one shared scrub definition: ambient credential-shaped and `DSH_*` names are dropped, and explicit `env` merges after the scrub. The local ordinary and terminal spawns both apply it; SDK-managed transports that own their spawn may import it directly.
 - Disposal of the service terminates all still-running managed processes and awaits their exit.
 
diff --git a/packages/subprocess/subprocess/README.zh.md b/packages/subprocess/subprocess/README.zh.md
index 5830d0fc39..f4c265a0f5 100644
--- a/packages/subprocess/subprocess/README.zh.md
+++ b/packages/subprocess/subprocess/README.zh.md
@@ -2,30 +2,30 @@
 
 [English](README.md) | 中文
 
-进程管理器 seam（`ctx.subprocess`）是同一执行世界中的进程侧。抽象的 `SubprocessService` 公开其规范化 `cwd`、私有 `runtimeRoot`、可执行文件查找、普通受管 `spawn` 和一项终端进程原语；其词汇涵盖原始／收集式 stdio、进程与终端句柄、退出事实、进程树／会话清理，以及受管的 `DSH_*` 环境命名空间。本地实现位于 [`dsh-subprocess-local`](../subprocess-local/README.md)。
+子进程 seam（`ctx.subprocess`）是一个执行世界的进程部分。抽象的 `SubprocessService` 公开其规范化 `cwd`、私有 `runtimeRoot`、可执行文件查找、普通受管 `spawn` 和一项终端进程原语；其词汇涵盖原始／收集式 stdio、进程与终端句柄、退出事实、进程树／会话清理，以及受管的 `DSH_*` 环境命名空间。本地实现位于 [`dsh-subprocess-local`](../subprocess-local/README.md)。
 
 ## 契约
 
-- `spawn(spec)` 立即返回一个实时句柄；`done` 在进程关闭时以退出事实 resolve（`SubprocessOutcome` 不携带输出，也不携带原因分类），仅在 spawn 层面失败时 reject。
-- `cwd` 与 `runtimeRoot` 是提供方执行世界中的绝对路径。消费方在 `runtimeRoot` 下物化私有辅助程序，绝不使用仅宿主可见的临时目录。`resolveExecutable(command, env?, signal?)` 验证绝对命令，或根据该执行世界清理后的 PATH 加显式覆盖来解析裸名称。
-- spec 完全显式（argv、cwd、按流划分的 stdio 处置方式（disposition）、宽限期），因为随部署变化的默认值属于调用方 seam 的配置，而不属于某个隐藏的进程管理器默认值（`dsh-bash` 的 request/spec 拆分是这条规则的所属模板）。`argv` 绝不经过 shell 解释；需要 shell 的消费方自行传入 `['bash', '-c', command]`。
-- stdio 按流采用 Node 形状：`'pipe'` 把原始流交给调用方做自己的协议分帧（LSP 的 JSON-RPC、ACP（Agent Client Protocol）的 ndjson），`'inherit'` 直通父进程描述符以承载诊断输出，收集模式（collect）`{ maxBytes, spill? }` 则缓冲一段有界尾部，外加可选的完整流 spill 文件。收集模式的读取器接受全流字节偏移量且从不消费，因此独立的读取器不会抢走彼此的增量；偏移量滑出内存尾部窗口的读取标记为 `lossy`，并在 spill 文件存在时指向它。收集到的输出在结算后仍可读取。
+- `spawn(spec)` 立即返回一个活动句柄；`done` 在进程关闭时以退出事实 resolve（`SubprocessOutcome` 不携带输出，也不携带原因分类），仅在 spawn 层面失败时 reject。
+- `cwd` 和 `runtimeRoot` 是提供方执行世界中的绝对路径。消费方在 `runtimeRoot` 之下物化私有辅助程序，绝不使用仅宿主可见的临时目录。`resolveExecutable(command, env?, signal?)` 验证绝对命令，或根据该执行世界清理后的 PATH 加显式覆盖来解析裸名称。
+- spec 完全显式（argv、cwd、按流划分的 stdio 处置方式（disposition）、宽限期），因为随部署变化的默认值属于调用方 seam 的配置，而不属于某个隐藏的子进程默认值（`dsh-bash` 的 request/spec 拆分是这条规则的所属模板）。`argv` 绝不经过 shell 解释；需要 shell 的消费方自行传入 `['bash', '-c', command]`。
+- stdio 按流采用 Node 风格：`'pipe'` 把原始流交给调用方做自己的协议分帧（LSP 的 JSON-RPC、ACP（Agent Client Protocol）的 ndjson），`'inherit'` 直通父进程描述符以承载诊断输出，收集模式（collect）`{ maxBytes, spill? }` 则缓冲一段有界尾部，外加可选的完整流 spill 文件。收集模式的读取器接受全流字节偏移量且从不消费，因此独立的读取器不会抢走彼此的增量；偏移量滑出内存尾部窗口的读取标记为 `lossy`，并在 spill 文件存在时指向它。收集到的输出在结算后仍可读取。
 - 终止在每个平台上都以进程树为范围（POSIX 用 detached 进程组并以直接子进程回退；Windows 用 `taskkill /T`）：`terminate()`（唯一的终止动词）执行 SIGTERM→宽限期→SIGKILL 升级（幂等，也由 spec 的 abort 信号驱动，进程树消亡后为空操作）；`waitForExit(signal?)` 观察整棵进程树的存活状态，使消费方自有的拆卸阶梯能在真正完全停稳后才进入下一层。管理器只响应中止，但绝不判定原因（deadline、拆卸阶梯与原因分类归调用方所有）。
-- `spawnTerminal(spec)` 是唯一的非管道原语。其句柄负责真实 PTY、UTF-8 文本 I/O、前台进程组检查／信号发送，以及一项须等待的 `terminate()` 操作；该操作会使整个会话完全停稳，并让所有在途句柄调用结算。spec 信号只取消分配；句柄一经发布，便负责自身生命周期。顶层进程退出后，输出流会在排完队列中的输出后结束；存活期间的传输故障会拒绝 `done`。这些操作仍属于一项基底原语，因为普通管道无法分配控制终端，也无法清理完整的终端会话；就绪检测、scrollback 与所有者策略仍归 PTY 消费方所有。
-- `scrubbedParentEnv()` / `SENSITIVE_ENV_PATTERN` 是唯一一份共享的凭据清除定义：环境中形似凭据的名称与 `DSH_*` 名称都会被丢弃，显式 `env` 在清除之后合并。本地普通 spawn 与终端 spawn 都应用这一定义；自行拥有 spawn 的 SDK 管理传输层可以直接导入它。
+- `spawnTerminal(spec)` 是唯一的非管道原语。其句柄负责真实 PTY、UTF-8 文本 I/O、前台进程组检查／信号发送，以及一项须等待的 `terminate()` 操作；该操作会使提供方仍可观察到的每个会话成员完全停稳，并结算在途句柄调用；提供方会记录执行基底特有的可观察性限制。spec 信号只取消分配；句柄一经发布，便负责自身生命周期。顶层进程退出时，输出流在已排队输出之后结束；存活传输失败会拒绝 `done`。这些操作保留为一项执行基底原语，因为普通管道无法分配控制终端或清理终端会话成员；就绪状态、scrollback 和所有者策略仍归 PTY 消费方所有。
+- `scrubbedParentEnv()` / `SENSITIVE_ENV_PATTERN` 是唯一一份共享的环境清理定义：环境中形似凭据的名称与 `DSH_*` 名称都会被丢弃，显式 `env` 在清除之后合并。本地的普通 spawn 与终端 spawn 都应用该定义；拥有自身 spawn 的 SDK 管理传输可直接导入它。
 - 服务自身的 dispose（资源释放）会终止所有仍在运行的受管进程并等待其退出。
 
-参见[进程管理器数据结构目录](../../../docs/core-data-structures/subprocess.md)与 [seam Agent Note（agent 决策记录）](../../../.agents/notes/implemented/architecture/2026-07-26-subprocess-seam.md)。
+参见[子进程数据结构目录](../../../docs/core-data-structures/subprocess.md)与[seam Agent Note（agent 决策记录）](../../../.agents/notes/implemented/architecture/2026-07-26-subprocess-seam.md)。
 
 ## 模型体验
 
-通过消费方 seam 间接影响（目前是 `dsh-tool-bash` 背后的 bash 执行器家族）；进程输出与生命周期面向模型的全部渲染归消费方所有。
+通过消费方 seam 间接影响（目前是 `dsh-tool-bash` 背后的 bash 执行器家族）；进程输出和生命周期的全部面向模型渲染均由消费方负责。
 
 #### KV Cache 影响
 
-不会直接失效；请求前缀变更由具名消费方负责。
+不会直接导致 KV Cache 失效；请求前缀变更由上述消费方负责。
 
 ## 已知限制与暂缓事项
 
-- **由 SDK 管理的 spawn 仍在服务之外**：自行拥有内部 spawn 的 SDK 传输层无法经该服务路由这次调用；它仍可导入 `scrubbedParentEnv`，使环境策略保持单一来源。
-- **拆卸阶梯归消费方所有**：该 seam 只提供信号动词与进程树存活等待，不提供现成的停稳序列；每个进程外消费方自行编码其子进程的配合形状（ACP 后端以 stdin EOF 打头的阶梯是仓库内模板）。
+- **由 SDK 管理的 spawn 仍在服务之外**：拥有内部 spawn 的 SDK 传输无法把该调用路由到本服务；它仍可导入 `scrubbedParentEnv`，使环境策略保持单一来源。
+- **拆卸阶梯归消费方所有**：该 seam 只提供信号动词与进程树存活等待，不提供现成的停稳序列；每个进程外消费方自行编码其子进程的配合方式（ACP 后端以 stdin EOF 打头的阶梯是仓库内模板）。
diff --git a/packages/subprocess/subprocess/src/types.ts b/packages/subprocess/subprocess/src/types.ts
index 6b606fd870..9801bf2f49 100644
--- a/packages/subprocess/subprocess/src/types.ts
+++ b/packages/subprocess/subprocess/src/types.ts
@@ -252,8 +252,9 @@ export interface SubprocessTerminalHandle {
    */
   signalForeground(signal: SubprocessTerminalSignal): Promise<number>
   /**
-   * Idempotently terminate the complete terminal session and await whole-session quiescence.
+   * Idempotently terminate every terminal-session member the provider can still observe and await quiescence.
    * After settlement, no write, inspection, or signal call remains in flight.
+   * Providers document substrate-specific observability limits.
    */
   terminate(): Promise<void>
 }