diff --git a/docs/testing.i18n.yaml b/docs/testing.i18n.yaml
index 3d7569c620..a5160543fb 100644
--- a/docs/testing.i18n.yaml
+++ b/docs/testing.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/testing.md
-testing.md: d460d9ba76eab84b79e8c66454325d03d7c5908e
-testing.zh.md: 821e49b6593b924e754d5ed0d588dd1b5b566051
+testing.md: 5e766bb684d9d76a1c9e854a2aef95796a31ec12
+testing.zh.md: 21b3f98e9ddbbb6f77621cff9ce206ae17125bc3
diff --git a/docs/testing.md b/docs/testing.md
index d460d9ba76..5e766bb684 100644
--- a/docs/testing.md
+++ b/docs/testing.md
@@ -7,7 +7,7 @@ How this repo tests, tier by tier, and the rules that keep a green suite meaning
 ## Tiers
 
 - **Unit** (`pnpm run test`): vitest over package and example specs under their `tests/**` directories plus repository script specs under `scripts/**/*.spec.ts`; tests stay with the code area they exercise. Every registry gets an HMR-safety test (dispose the contributing fiber, assert cleanup). Prefer edge cases, error paths, event ordering, concurrency races, and permanent contract regressions (see `packages/core/agent-loop/tests/contract-regressions.spec.ts`).
-- **Coverage gate** (`pnpm run test:coverage`): the gating run, per-file 100% on `packages/*/*/src`. An uncovered line is often dead code the gate is correctly flagging for deletion, not a missing test to bolt on. Line coverage is necessary, never sufficient — it proves lines ran, not that the feature works as shipped.
+- **Coverage gate** (`pnpm run test:coverage`): the gating run, per-file 100% on `packages/*/*/src`. An uncovered line is often dead code the gate is correctly flagging for deletion, not a missing test to bolt on. Line coverage is necessary, never sufficient — it proves lines ran, not that the feature works as shipped. Per-file 100% on `packages/bash/pwsh-local/src` needs a real `pwsh`: without one its executor suites self-skip and `vitest.config.ts` exempts the file so pwsh-less hosts stay green, while CI runners ship pwsh and enforce the full bar.
 - **Real-API e2e** (`pnpm run test:e2e`): with-key tests against live provider APIs — the DeepSeek model plus provider-specific smokes that gate on their own keys (`EXA_API_KEY`, `PERPLEXITY_API_KEY`, …); each suite self-skips without its key so keyless CI stays green ([real-API e2e Agent Note](../.agents/notes/implemented/testing/2026-06-19-real-api-e2e-ci.md)).
 - **Snapshot** (`pnpm run test:snapshot`): keyless expected outputs cover external behavior — transport contracts and presentation, while persisted logs pin assembled backend behavior. ACP boots the real automation-server example, replays a recorded session, and diffs normalized JSON-RPC plus the re-persisted log ([ACP snapshot Agent Note](../.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md)); headless pins `stream-json` through its real one-shot process. TUI journeys replay primary/child JSONL through the real loop and tools, then project ANSI into semantic terminal-state outputs; package snapshots retain transient states and a real PTY covers the process boundary ([TUI snapshot Agent Note](../.agents/notes/implemented/testing/2026-07-18-tui-terminal-state-snapshots.md)). Use `pnpm run test:snapshot:record` when a model transcript changes and `pnpm run test:snapshot:refresh` when replay input remains valid; review every JSONL and expected-output diff. One ACP scenario (`text-turn`) pins full system-prompt/tool-schema content; other fixtures tokenize it so an edit churns one line ([pinned-header Agent Note](../.agents/notes/archived/testing/2026-07-06-pin-request-header-content-in-one-scenario.md)).
 - **Web browser snapshot** (`pnpm run test:web`; required Linux PR gate): Chromium compares replayed browser output with `apps/web/tests/snapshots/`. CI forces read-only `DSH_SNAPSHOT=replay`, never writing expected outputs; record/refresh stay local and every diff is reviewed ([web e2e lane](../.agents/notes/implemented/testing/2026-07-24-web-gui-browser-e2e-lane.md), [CI gate decision](../.agents/notes/implemented/testing/2026-07-30-web-browser-snapshot-ci-gate.md)). `test:web` [builds first](../.agents/notes/implemented/bug-fix/2026-07-28-themed-scrollbars-and-reserved-gutter.md) for plugin CSS.
diff --git a/docs/testing.zh.md b/docs/testing.zh.md
index 821e49b659..21b3f98e9d 100644
--- a/docs/testing.zh.md
+++ b/docs/testing.zh.md
@@ -7,7 +7,7 @@
 ## 层级
 
 - **单元测试**（`pnpm run test`）：vitest 运行包（package）和示例各自的 `tests/**` 目录下的测试，以及匹配 `scripts/**/*.spec.ts` 的仓库脚本测试；测试文件与其所覆盖的代码区域放在一起。每个注册表都有一个 HMR（热模块替换）安全测试（dispose（资源释放）贡献的 fiber，断言清理完成）。优先覆盖边界情况、错误路径、事件顺序、并发竞态，以及永久性契约回归（见 `packages/core/agent-loop/tests/contract-regressions.spec.ts`）。
-- **覆盖率门禁**（`pnpm run test:coverage`）：门禁级运行，对 `packages/*/*/src` 按文件 100% 覆盖。未覆盖的行往往是门禁正确标记出的死代码（应删除），而非需要补写的测试。行覆盖率是必要条件，但永远不是充分条件：它证明行被执行过，不证明功能按交付预期工作。
+- **覆盖率门禁**（`pnpm run test:coverage`）：门禁级运行，对 `packages/*/*/src` 按文件 100% 覆盖。未覆盖的行往往是门禁正确标记出的死代码（应删除），而非需要补写的测试。行覆盖率是必要条件，但永远不是充分条件：它证明行被执行过，不证明功能按交付预期工作。`packages/bash/pwsh-local/src` 的按文件 100% 覆盖需要真实的 `pwsh`：缺少它时其 executor 套件会自动跳过，`vitest.config.ts` 会豁免该文件以使无 pwsh 的主机保持绿色，而 CI runner 自带 pwsh，仍按完整标准执行门禁。
 - **真实 API e2e**（`pnpm run test:e2e`）：带密钥测试调用真实提供方 API，包括 DeepSeek 模型以及各提供方特有的冒烟测试；这些测试各自由自己的密钥控制（`EXA_API_KEY`、`PERPLEXITY_API_KEY` 等），缺少密钥时套件会自动跳过，使 keyless CI 保持绿色（[真实 API e2e Agent Note](../.agents/notes/implemented/testing/2026-06-19-real-api-e2e-ci.md)）。
 - **快照**（`pnpm run test:snapshot`）：无密钥预期输出覆盖对外行为（传输契约与呈现），持久化日志则固定组装后的后端行为。ACP 启动真实的自动化服务器示例、回放录制会话，并对归一化 JSON-RPC 与重新持久化的日志执行 diff（[ACP 快照 Agent Note](../.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md)）；headless 通过真实单次运行进程固定 `stream-json`。TUI 旅程通过真实循环与工具回放主会话与子会话 JSONL，再将 ANSI 投影为语义化终端状态输出；包级快照保留瞬态状态，真实 PTY 覆盖进程边界（[TUI 快照 Agent Note](../.agents/notes/implemented/testing/2026-07-18-tui-terminal-state-snapshots.md)）。当模型 transcript（文本记录）发生变化时使用 `pnpm run test:snapshot:record`，回放输入仍然有效时使用 `pnpm run test:snapshot:refresh`；请审查每一处 JSONL 与预期输出差异。一个 ACP 场景（`text-turn`）固定完整的系统提示词与工具 schema 内容；其他 fixture（测试前置数据）将其 token 化，因此修改只会扰动一行（[pinned-header Agent Note](../.agents/notes/archived/testing/2026-07-06-pin-request-header-content-in-one-scenario.md)）。
 - **Web 浏览器快照**（`pnpm run test:web`；必需的 Linux PR（Pull Request）门禁）：Chromium 将回放后的浏览器输出与 `apps/web/tests/snapshots/` 比较。CI 强制只读的 `DSH_SNAPSHOT=replay`，绝不写入预期输出；record/refresh 留在本地，每处 diff 都须评审（[web e2e 车道](../.agents/notes/implemented/testing/2026-07-24-web-gui-browser-e2e-lane.md)、[CI 门禁决策](../.agents/notes/implemented/testing/2026-07-30-web-browser-snapshot-ci-gate.md)）。`test:web` 会[先构建](../.agents/notes/implemented/bug-fix/2026-07-28-themed-scrollbars-and-reserved-gutter.md)以交付插件 CSS。
diff --git a/examples/acp-agent/tests/snapshots/cancel-tool-calls/session.jsonl b/examples/acp-agent/tests/snapshots/cancel-tool-calls/session.jsonl
index a05cd1c28f..d66020b594 100644
--- a/examples/acp-agent/tests/snapshots/cancel-tool-calls/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/cancel-tool-calls/session.jsonl
@@ -16,7 +16,7 @@
 {"type":"assistant/chunk","seq":14,"time":1785487611319,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
 {"type":"assistant/message","seq":15,"time":1785487611319,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_wait","name":"bash","arguments":"{\"command\":\"node -e \\\"require('node:fs').writeFileSync('started.txt', 'started'); setInterval(() => {}, 1000)\\\"\",\"description\":\"Wait until cancellation\"}"},{"type":"tool-call","id":"call_skipped","name":"bash","arguments":"{\"command\":\"printf skipped > skipped.txt\",\"description\":\"Write skipped marker\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"bd630f41-b45d-4183-a785-1ff6e7049b62"},"usage":{"inputTokens":10,"outputTokens":10}},"sourceEventSeqs":[7,8,9,10,11,12,13,14],"surfaceOp":"append"}
 {"type":"tool/call","seq":16,"time":1785487611319,"data":{"turn":1,"step":1,"callId":"call_wait","name":"bash","arguments":"{\"command\":\"node -e \\\"require('node:fs').writeFileSync('started.txt', 'started'); setInterval(() => {}, 1000)\\\"\",\"description\":\"Wait until cancellation\"}"}}
-{"type":"tool/result","seq":17,"time":1785487611378,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_wait"},"content":[{"type":"tool-result","toolCallId":"call_wait","content":[{"type":"text","text":"Error: tool call aborted"}],"isError":true}],"role":"user","id":"252903b2-b4e1-4a33-81d8-d5befefcb27e","error":{"name":"AbortError","code":"ABORTED"}},"sourceEventSeqs":[16],"surfaceOp":"append"}
+{"type":"tool/result","seq":17,"time":1785487611378,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_wait"},"content":[{"type":"tool-result","toolCallId":"call_wait","content":[{"type":"text","text":"Error: tool call aborted"}],"isError":true}],"role":"user","id":"252903b2-b4e1-4a33-81d8-d5befefcb27e"},"error":{"name":"AbortError","code":"ABORTED"}},"sourceEventSeqs":[16],"surfaceOp":"append"}
 {"type":"tool/call","seq":18,"time":1785487611378,"data":{"turn":1,"step":1,"callId":"call_skipped","name":"bash","arguments":"{\"command\":\"printf skipped > skipped.txt\",\"description\":\"Write skipped marker\"}"}}
 {"type":"tool/result","seq":19,"time":1785487611378,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_skipped"},"content":[{"type":"tool-result","toolCallId":"call_skipped","content":[{"type":"text","text":"Error: tool call aborted before dispatch"}],"isError":true}],"role":"user","id":"282c5c8c-7296-4545-8014-e6393b351436"},"error":{"name":"AbortError","code":"ABORTED_BEFORE_DISPATCH"}},"sourceEventSeqs":[18],"surfaceOp":"append"}
 {"type":"step/end","seq":20,"time":1785487611378,"data":{"turn":1,"step":1}}
diff --git a/scripts/doc-budgets.manifest.json b/scripts/doc-budgets.manifest.json
index 4387a894f1..9e8d6076ec 100644
--- a/scripts/doc-budgets.manifest.json
+++ b/scripts/doc-budgets.manifest.json
@@ -4,7 +4,7 @@
   "docs/architecture.md": 2160,
   "docs/cordis-primer.md": 600,
   "docs/defensive-patterns.md": 550,
-  "docs/testing.md": 1120,
+  "docs/testing.md": 1150,
   "examples/AGENTS.md": 310,
   "packages/AGENTS.md": 675,
   "packages/README.md": 920
diff --git a/vitest.config.ts b/vitest.config.ts
index 14d5be103f..458b1134b1 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -1,3 +1,4 @@
+import { spawnSync } from 'node:child_process'
 import tsconfigPaths from 'vite-tsconfig-paths'
 import { defineConfig } from 'vitest/config'
 import { vitestExecArgv } from './vitest.shared.ts'
@@ -39,6 +40,18 @@ const windowsCoverageExclusions = process.platform === 'win32'
     ]
   : []
 
+// Mirrors windowsCoverageExclusions: pwsh-local's run/start/lifecycle suites
+// self-skip without a real pwsh (executor.spec.ts hasPwsh), leaving this file
+// far below per-file 100% on pwsh-less hosts; the exemption keeps those hosts
+// green while CI runners ship pwsh and still enforce the full bar. The probe
+// is deliberately PATH-only (narrower than the suites' resolvePwshPath): a
+// win32 host where only install-location pwsh or 5.1 resolves forfeits the
+// exemption while the suites still run, so the gate can only get stricter,
+// never falsely green.
+const pwshCoverageExclusions = spawnSync('pwsh', ['-NoLogo', '-NoProfile', '-NonInteractive', '-Command', '$true'], { encoding: 'utf8' }).status === 0
+  ? []
+  : ['packages/bash/pwsh-local/src/index.ts']
+
 const testIncludes = [
   'packages/*/*/tests/**/*.spec.{ts,tsx}',
   'apps/*/tests/**/*.spec.ts',
@@ -203,6 +216,7 @@ export default defineConfig({
         'packages/ui/tui/src/index.ts',
         ...windowsUnsupportedPackages.map(path => `${path}/src/**/*.ts`),
         ...windowsCoverageExclusions,
+        ...pwshCoverageExclusions,
       ],
       // 100% or it doesn't merge (docs/testing.md: excessive tests are welcome).
       // Per-file so a well-covered big file can't subsidize a bare one.