feat(sandbox): Windows ACL write-restriction sandbox (restricted-token runner)

Confine Windows command execution through a WRITE_RESTRICTED token whose restricting SIDs carry an orphan-SID write allowlist, ported from https://github.com/huoyaoyuan/windows-acl-restrict-poc (@ 10e4dfb). Every Win32 call is checked and fails closed - the POC silently ran children with the FULL token when CreateRestrictedToken failed.

- @deepseek-ai/dsh-sandbox-windows-acl: koffi primitives verified against the MinGW Windows headers (verify/abi-probe.cpp) plus the confinement runner ([node, runner, --workspace, --temp, --mode, --, argv...]: kill-on-close job, stdio passthrough, exit-code mirroring, windows-acl-run: failure signature, grant revocation). read-only = strict zero grants (NUL device not writable; documented). Windows-only execution: exempted from the Linux coverage lane (windowsOnlyCoverageExclusions).
- @deepseek-ai/dsh-sandbox-local: PLATFORM_CHAINS.win32 filled with the windows-acl runner (full enforcement, ACL denial dialect, runner-failure rules).
- @deepseek-ai/dsh-pwsh-sandbox: sandbox-consuming pwsh executor (call-for-call mirror of dsh-bash-sandbox) over a new argv-level seam in dsh-pwsh-local; per-file coverage complete via the fake-provider spec.
- bundle/base: the Windows platform layer mounts the confined pwsh roster - sandbox/policy/fs-sandbox/permission/approval re-enabled, the POSIX bash stack stays disabled.

Co-authored-by: Huo Yaoyuan <huoyaoyuan@hotmail.com>

packages/bash/pwsh-sandbox/README.zh.md

@@ -0,0 +1,24 @@
+# @deepseek-ai/dsh-pwsh-sandbox
+
+[English](README.md) | 中文
+
+沙盒消费型的 [`ctx.bash` 执行器 seam](../bash/) 的 PowerShell 实现：每条命令以 `pwsh -NoLogo -NoProfile -NonInteractive -Command <command>` 运行，**经 `ctx.sandbox` 隔离**，选定模式、强制完整性、拒绝事实都盖在每次结算的结果上。它是 [`@deepseek-ai/dsh-bash-sandbox`](../bash-sandbox/) 的 pwsh 孪生，按 [pwsh 执行器与工具决策](../../../.agents/notes/implemented/feature/2026-08-01-pwsh-tool-and-executor.zh.md) 逐调用镜像——隔离实体本身是平台无关的：Windows 上沙盒 seam 解析到 ACL 受限令牌 runner 链（[`@deepseek-ai/dsh-sandbox-windows-acl`](../../sandbox/sandbox-windows-acl/)），Linux/macOS 上解析到 bwrap/Landlock/Seatbelt。
+
+执行器继承 [`@deepseek-ai/dsh-pwsh-local`](../pwsh-local/) 的进程机制，并消费其 argv 级 seam（`argv()` / `runArgv()` / `startArgv()` / `onProcessDone()`）把精确的 pwsh 调用经 provider 包装。沙盒策略（模式 + 工作区根目录）不是本包的配置：每次调用由 `ctx.sandboxPolicy` 随行（工具层传调用会话解析后的策略；直接调用回退到部署策略）。
+
+## 行为
+
+- `danger-full-access`：命令经本地执行器原样运行；结果携带 `sandbox: { mode, denied: false }`。
+- 受限模式（`read-only`、`workspace-write`）：pwsh argv 由 `ctx.sandbox.confine()` 包装；runner 启动失败按 fail-closed 抛 `SANDBOX_UNAVAILABLE`（前台抛错、后台记 `runnerFailed` 事实），被拒绝的写按所选后端的 `denialSignatures` 分类为 `sandbox.denied`。
+
+## 模型体验
+
+### 隔离生效，拒绝以命令失败呈现
+
+模型看到受限命令自身的 stderr（Windows ACL runner 下如 `Access to the path '...' is denied.`）；工具层把分类后的拒绝转成标准权限拒绝面，与 bash 工具完全一致。
+
+## 已知限制与后续工作
+
+- **Windows 上读不受限**（ACL runner 只限写）；读边界文档在 `@deepseek-ai/dsh-sandbox-windows-acl`。
+- **Windows workspace-write 的临时区域是真实临时目录**（`GetTempPathW`），与 Landlock 授予 `/tmp` 同语义——按运行创建私有临时目录需要 runner 改写环境块，留待后续。
+- **Windows read-only 是严格零授权**——连 NUL 设备都不可写；`> $null` 重定向不受影响（后端包有文档）。