diff --git a/.agents/notes/implemented/feature/2026-08-01-pwsh-tool-and-executor.i18n.yaml b/.agents/notes/implemented/feature/2026-08-01-pwsh-tool-and-executor.i18n.yaml
index d4ec255235..efd7d56dae 100644
--- a/.agents/notes/implemented/feature/2026-08-01-pwsh-tool-and-executor.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-08-01-pwsh-tool-and-executor.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/feature/2026-08-01-pwsh-tool-and-executor.md
-2026-08-01-pwsh-tool-and-executor.md: 7206f8ffe6640f8499f8453c40ab5846b23112c6
-2026-08-01-pwsh-tool-and-executor.zh.md: 5a48adb79fed209d2d2ecb9514fd51538491f04c
+2026-08-01-pwsh-tool-and-executor.md: 77f0a13d0efa55c91b4e58ee2474ac6877947c80
+2026-08-01-pwsh-tool-and-executor.zh.md: 95c0d8f087f11d192350cf92ed866bb8a4ea33b4
diff --git a/.agents/notes/implemented/feature/2026-08-01-pwsh-tool-and-executor.md b/.agents/notes/implemented/feature/2026-08-01-pwsh-tool-and-executor.md
index 7206f8ffe6..77f0a13d0e 100644
--- a/.agents/notes/implemented/feature/2026-08-01-pwsh-tool-and-executor.md
+++ b/.agents/notes/implemented/feature/2026-08-01-pwsh-tool-and-executor.md
@@ -17,7 +17,7 @@ Two new packages under `packages/bash/`:
 
 Windows vitest coverage is deliberately NOT part of this change: the repo's Windows CI lane owns build/static gates, and unit coverage runs on Linux, where both packages' suites run against a real `pwsh` (preinstalled on the GitHub-hosted runners) or self-skip when absent. The vitest `windowsUnsupportedPackages` exclusion narrows from `packages/bash/*` to the bash-requiring packages so the pwsh suites can also run natively on Windows dev machines.
 
-The roadmap beyond this decision — defaulting Windows hosts to `pwsh` (bash off), and pwsh TUI/GUI rendering — is recorded separately as [a proposal](../../proposed/feature/2026-08-01-windows-pwsh-default.md).
+The roadmap beyond this decision — defaulting Windows hosts to `pwsh` (bash off), and pwsh TUI/GUI rendering — is recorded separately as [the Windows pwsh default decision](2026-08-01-windows-pwsh-default.md).
 
 ## Alternatives considered
 
diff --git a/.agents/notes/implemented/feature/2026-08-01-pwsh-tool-and-executor.zh.md b/.agents/notes/implemented/feature/2026-08-01-pwsh-tool-and-executor.zh.md
index 5a48adb79f..95c0d8f087 100644
--- a/.agents/notes/implemented/feature/2026-08-01-pwsh-tool-and-executor.zh.md
+++ b/.agents/notes/implemented/feature/2026-08-01-pwsh-tool-and-executor.zh.md
@@ -17,7 +17,7 @@ harness 在每个平台只说一种 shell 方言：`bash`。Windows 主机只能
 
 Windows vitest 覆盖率刻意不属本次改动：仓库的 Windows CI 通道负责构建/静态门禁，单元覆盖在 Linux 上运行，两个包的套件在那里以真实 `pwsh` 运行（GitHub 托管 runner 预装）或缺失时自行跳过。vitest 的 `windowsUnsupportedPackages` 排除从 `packages/bash/*` 收窄为真正需要 bash 的包，使 pwsh 套件也能在 Windows 开发机上原生运行。
 
-本决策之后的路线图——让 Windows 主机默认 `pwsh`（关闭 bash）与 pwsh TUI/GUI 渲染——另行记录为[提案](../../proposed/feature/2026-08-01-windows-pwsh-default.md)。
+本决策之后的路线图——让 Windows 主机默认 `pwsh`（关闭 bash）与 pwsh TUI/GUI 渲染——已落地为 [Windows 默认 pwsh 决策](2026-08-01-windows-pwsh-default.md)。
 
 ## 备选方案
 
diff --git a/.agents/notes/implemented/feature/2026-08-01-windows-pwsh-default.i18n.yaml b/.agents/notes/implemented/feature/2026-08-01-windows-pwsh-default.i18n.yaml
new file mode 100644
index 0000000000..e26d1ca354
--- /dev/null
+++ b/.agents/notes/implemented/feature/2026-08-01-windows-pwsh-default.i18n.yaml
@@ -0,0 +1,6 @@
+# Bilingual-pair consistency record (docs/i18n/README.md): the git blob hash of each
+# 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/feature/2026-08-01-windows-pwsh-default.md
+2026-08-01-windows-pwsh-default.md: 1fa30ef757ccb81544479a08887355839fb86d46
+2026-08-01-windows-pwsh-default.zh.md: c6e1361dba29cff8340ef6e26bf071f81544642b
diff --git a/.agents/notes/implemented/feature/2026-08-01-windows-pwsh-default.md b/.agents/notes/implemented/feature/2026-08-01-windows-pwsh-default.md
new file mode 100644
index 0000000000..1fa30ef757
--- /dev/null
+++ b/.agents/notes/implemented/feature/2026-08-01-windows-pwsh-default.md
@@ -0,0 +1,42 @@
+# Agent Note: Windows defaults to pwsh
+
+Status: implemented
+
+English | [中文](2026-08-01-windows-pwsh-default.zh.md)
+
+## Problem
+
+The harness's shipped execution profile is bash-first on every platform. Windows hosts must install a bash shim (WSL or Git-Bash) or fall back to the POSIX-only `dsh-bash-local` behavior (hardcoded `bash -c` argv, process-group semantics); the model-facing bash tool teaches the bash dialect. The Windows-native foundation shipped in the [pwsh executor and tool decision](2026-08-01-pwsh-tool-and-executor.md) — a PowerShell implementation of the `ctx.bash` seam and a parity `pwsh` tool — but shipped compositions still mounted the bash stack on Windows, so a Windows host without a shim could not run the shipped shell.
+
+## Decision
+
+Windows hosts booting a shipped profile (`dsh web`, `dsh --profile headless`, one-shot tasks) get the PowerShell stack by default; POSIX hosts are unchanged.
+
+- **The platform layer is a data file, not a roster rewrite.** `@deepseek-ai/dsh-base` ships [`windows.cordis.patch.yml`](../../../../packages/bundle/base/windows.cordis.patch.yml) alongside its universal `cordis.patch.yml`: it disables `bash-sandbox`/`tool-bash` (the POSIX-only executor and its dialect tool), disables `permission`/`ui-permission` (dsh-permission requires a confining executor — presets bundle a sandbox mode the unconfined pwsh executor cannot honor; see its constructor guard — and the client knob would advertise a shell it cannot enforce), and inserts `pwsh-local`/`tool-pwsh`. The fs tools keep the sandbox policy and approval service, so file confinement and escalation still apply on Windows.
+- **The launcher injects the layer by platform.** `apps/cli/src/windows-shell.ts` resolves it from the base bundle layer's `packageDir` between the bundle layers and the user layers on `win32` hosts, in every composition path (boot, config-only HMR recomposition, config dumps). Overriding the shipped default is a composition decision: a Windows host that prefers the bash stack re-enables the bash rows through its profile or home `cordis.patch.yml`. Custom profiles without the base bundle are skipped (they own their shell stack); a base bundle that ships no Windows shell patch fails loud.
+- **Module resolution is restored for cold starts.** The profiles-rework CLI dropped the pwsh packages from `apps/cli`'s dependency closure, so `healProfilesModuleFallback` never linked them into `$DSH_HOME/profiles/node_modules` and a fresh Windows host could not resolve the inserted rows. `apps/cli` and `dsh-base` re-declare `dsh-pwsh-local`/`dsh-tool-pwsh`; the base bundle lists every row plugin as a dependency by house style.
+
+The pwsh GUI rendering stage (stage 2 of the original roadmap) shipped earlier with the [pwsh UI presentation matches bash decision](2026-08-05-pwsh-ui-bash-parity.md); the [pwsh tool bash parity decision](2026-08-02-pwsh-tool-bash-parity.md) ships the tool's surface. Nothing in this decision changes POSIX behavior.
+
+## Alternatives considered
+
+**Default Windows to pwsh inside `dsh-bash-local` (one executor, dialect switch).** Rejected for the same reason the executor decision rejected a mode switch: the executor's identity is the shell it spawns, and platform-gated composition is a deployment choice, not an executor config.
+
+**Ship the platform layer from `apps/cli` code instead of a bundle data file.** Rejected: the patch belongs next to the rows it replaces, in the bundle that owns them, so the shipped roster stays visible as composition data and dumps carry its provenance; the launcher contributes only the win32 gate.
+
+**Keep `permission`/`ui-permission` on Windows.** Rejected: `dsh-permission` hard-requires `ctx.bash.sandboxMode` and fails loud at load over an unconfined executor; making it tolerate an unconfined shell would advertise presets the shell cannot honor. File confinement keeps working through the fs stack.
+
+**Ship a `DSH_WINDOWS_SHELL` environment escape hatch.** Rejected: decisive behavior changes belong in composition config, which already overrides the platform layer row by id; a second override channel would split the single source of truth for roster decisions.
+
+## Consequences
+
+- A Windows host running a shipped `dsh` surface gets `pwsh` as its shell tool and PowerShell as the `ctx.bash` executor without configuration; `bash` is absent from the model-visible roster there (its tool row is disabled).
+- POSIX hosts are unchanged: the platform layer never applies, and the bash stack remains the universal `cordis.patch.yml` rows.
+- Windows hosts that prefer the bash stack (e.g. with WSL/Git-Bash on PATH) override the shipped default through their profile or home `cordis.patch.yml` — composition config is the one override channel.
+- The permission switcher leaves the Windows roster; session permission facts pin the composition defaults through the approval service and sandbox policy.
+
+## Verification
+
+- Unit: `apps/cli/tests/windows-shell.spec.ts` pins the win32 default, the custom-profile skip, and the missing-patch failure, with the platform injected.
+- Keyless: a win32 `dsh --profile <name> --dump-config` shows the pwsh rows with `windows.cordis.patch.yml` provenance and the bash rows disabled; the POSIX dump (CI Linux) is unchanged.
+- The real-composition smoke boots the web profile on win32 with the pwsh stack mounted (the exact roster this note describes).
diff --git a/.agents/notes/implemented/feature/2026-08-01-windows-pwsh-default.zh.md b/.agents/notes/implemented/feature/2026-08-01-windows-pwsh-default.zh.md
new file mode 100644
index 0000000000..c6e1361dba
--- /dev/null
+++ b/.agents/notes/implemented/feature/2026-08-01-windows-pwsh-default.zh.md
@@ -0,0 +1,42 @@
+# Agent Note: Windows 默认改用 pwsh
+
+Status: implemented
+
+[English](2026-08-01-windows-pwsh-default.md) | 中文
+
+## 问题
+
+harness 交付的执行画像在每个平台都是 bash 优先。Windows 主机必须安装 bash 垫片（WSL 或 Git-Bash），或退回到仅 POSIX 的 `dsh-bash-local` 行为（硬编码 `bash -c` argv、进程组语义）；面向模型的 bash 工具教的是 bash 方言。Windows 原生基础已随 [pwsh 执行器与工具决策](2026-08-01-pwsh-tool-and-executor.md) 交付——`ctx.bash` seam 的 PowerShell 实现与对等的 `pwsh` 工具——但交付组合在 Windows 上仍然挂载 bash 栈，没有垫片的 Windows 主机跑不了交付的 shell。
+
+## 决策
+
+启动交付 profile（`dsh web`、`dsh --profile headless`、一次性任务）的 Windows 主机默认获得 PowerShell 栈；POSIX 主机不变。
+
+- **平台层是数据文件，不是清单重写。** `@deepseek-ai/dsh-base` 随通用 `cordis.patch.yml` 一起交付 [`windows.cordis.patch.yml`](../../../../packages/bundle/base/windows.cordis.patch.yml)：它禁用 `bash-sandbox`/`tool-bash`（仅 POSIX 的执行器及其方言工具）、禁用 `permission`/`ui-permission`（dsh-permission 要求有限权能力的执行器——preset 捆绑的是无限制 pwsh 执行器无法兑现的 sandbox 模式；见其构造函数守卫——客户端旋钮会宣传一个它无法强制执行的 shell），并插入 `pwsh-local`/`tool-pwsh`。fs 工具保留 sandbox 策略与批准服务，因此 Windows 上的文件限制与升级仍然生效。
+- **启动器按平台注入该层。** `apps/cli/src/windows-shell.ts` 在 `win32` 主机上从 base bundle 层的 `packageDir` 解析它，置于 bundle 层与用户层之间，覆盖所有组合路径（启动、config-only HMR 重组合、配置转储）。覆盖交付默认是组合决策：偏好 bash 栈的 Windows 主机通过其 profile 或 home 的 `cordis.patch.yml` 重新启用 bash 行。未挂 base bundle 的自定义 profile 被跳过（它们自己拥有 shell 栈）；base bundle 缺 `windows.cordis.patch.yml` 时 fail loud。
+- **冷启动的模块解析已恢复。** profiles 重构把 pwsh 包从 `apps/cli` 的依赖闭包中删掉了，`healProfilesModuleFallback` 因此从未把它们链接进 `$DSH_HOME/profiles/node_modules`，新 Windows 主机解析不到插入的行。`apps/cli` 与 `dsh-base` 重新声明 `dsh-pwsh-local`/`dsh-tool-pwsh`；按仓库惯例，base bundle 把每个行插件都列为依赖。
+
+原路线图的阶段 2（pwsh GUI 渲染）已随 [pwsh UI 呈现与 bash 对齐决策](2026-08-05-pwsh-ui-bash-parity.md) 先行交付；[pwsh 工具与 bash 对齐决策](2026-08-02-pwsh-tool-bash-parity.md) 交付了工具表面。本决策不改变任何 POSIX 行为。
+
+## 备选方案
+
+**在 `dsh-bash-local` 内部让 Windows 默认 pwsh（一个执行器，方言开关）。** 否决，理由与执行器决策否决模式开关相同：执行器的身份就是它 spawn 的 shell，而按平台门控的组合是部署选择，不是执行器配置。
+
+**从 `apps/cli` 代码而非 bundle 数据文件交付平台层。** 否决：patch 应放在它替换的行旁边、属于拥有这些行的 bundle，让交付清单作为组合数据保持可见、转储带有出处；启动器只贡献 win32 门控。
+
+**在 Windows 上保留 `permission`/`ui-permission`。** 否决：`dsh-permission` 硬性要求 `ctx.bash.sandboxMode`，在无限制执行器上加载即 fail loud；让它容忍无限制 shell 会宣传 shell 无法兑现的 preset。文件限制继续经由 fs 栈生效。
+
+**交付 `DSH_WINDOWS_SHELL` 环境变量逃生门。** 否决：决定性的行为变更应集中在组合配置中，而组合配置已能按行 id 覆盖平台层；第二条覆盖通道会分裂清单决策的单一事实来源。
+
+## 后果
+
+- 运行交付版 `dsh` 表面的 Windows 主机无需配置即获得 `pwsh` 作为 shell 工具、PowerShell 作为 `ctx.bash` 执行器；那里的模型可见清单中没有 `bash`（其工具行被禁用）。
+- POSIX 主机不变：平台层永不生效，bash 栈仍是通用 `cordis.patch.yml` 的行。
+- 偏好 bash 栈的 Windows 主机（例如 PATH 上有 WSL/Git-Bash 时）通过其 profile 或 home 的 `cordis.patch.yml` 覆盖交付默认——组合配置是唯一的覆盖通道。
+- 权限切换器离开 Windows 清单；会话权限事实通过批准服务与 sandbox 策略固定组合默认值。
+
+## 验证
+
+- 单元：`apps/cli/tests/windows-shell.spec.ts` 固定 win32 默认、自定义 profile 跳过与缺文件失败，平台注入。
+- Keyless：win32 上的 `dsh --profile <name> --dump-config` 显示带 `windows.cordis.patch.yml` 出处的 pwsh 行、被禁用的 bash 行；POSIX 转储（CI Linux）不变。
+- 真实组合冒烟在 win32 上启动 web profile，pwsh 栈挂载成功（即本笔记描述的确切清单）。
diff --git a/.agents/notes/implemented/feature/2026-08-05-pwsh-ui-bash-parity.i18n.yaml b/.agents/notes/implemented/feature/2026-08-05-pwsh-ui-bash-parity.i18n.yaml
index dcb3a9406b..204560cfb5 100644
--- a/.agents/notes/implemented/feature/2026-08-05-pwsh-ui-bash-parity.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-08-05-pwsh-ui-bash-parity.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/feature/2026-08-05-pwsh-ui-bash-parity.md
-2026-08-05-pwsh-ui-bash-parity.md: 6bbdb0e6bc69ef1af03a6a9146f83b84754cb2a6
-2026-08-05-pwsh-ui-bash-parity.zh.md: 75f3a3ddec002acaa1755c81114b0f122ab80593
+2026-08-05-pwsh-ui-bash-parity.md: 23693c833a779da7a0f52ab1c959bf7eb8649310
+2026-08-05-pwsh-ui-bash-parity.zh.md: ef44e9ff043c0a533d2cc34bb776c6eb3f0566f8
diff --git a/.agents/notes/implemented/feature/2026-08-05-pwsh-ui-bash-parity.md b/.agents/notes/implemented/feature/2026-08-05-pwsh-ui-bash-parity.md
index 6bbdb0e6bc..23693c833a 100644
--- a/.agents/notes/implemented/feature/2026-08-05-pwsh-ui-bash-parity.md
+++ b/.agents/notes/implemented/feature/2026-08-05-pwsh-ui-bash-parity.md
@@ -6,7 +6,7 @@ English | [中文](2026-08-05-pwsh-ui-bash-parity.zh.md)
 
 ## Problem
 
-The [pwsh tool bash parity decision](../../implemented/feature/2026-08-02-pwsh-tool-bash-parity.md) made `dsh-tool-pwsh` behaviorally interchangeable with `dsh-tool-bash` for execution, markers, and background tasks, but explicitly deferred the human-visible half: a completed pwsh foreground call presented as a generic `console`-fenced card while the bash tool's completed call presented as a terminal card with a parsed exit-status pill. The roadmap that owned this gap ([Windows defaults to pwsh](../../proposed/feature/2026-08-01-windows-pwsh-default.md)) named "pwsh TUI/GUI rendering" as stage 2 — but the TUI package was removed ([`ed30088adb`](https://github.com/deepseek-harness/deepseek-harness/commit/ed30088adb)), leaving the Web surface as the only UI the gap affects.
+The [pwsh tool bash parity decision](../../implemented/feature/2026-08-02-pwsh-tool-bash-parity.md) made `dsh-tool-pwsh` behaviorally interchangeable with `dsh-tool-bash` for execution, markers, and background tasks, but explicitly deferred the human-visible half: a completed pwsh foreground call presented as a generic `console`-fenced card while the bash tool's completed call presented as a terminal card with a parsed exit-status pill. The roadmap that owned this gap ([Windows defaults to pwsh](../../implemented/feature/2026-08-01-windows-pwsh-default.md)) named "pwsh TUI/GUI rendering" as stage 2 — but the TUI package was removed ([`ed30088adb`](https://github.com/deepseek-harness/deepseek-harness/commit/ed30088adb)), leaving the Web surface as the only UI the gap affects.
 
 ## Decision
 
diff --git a/.agents/notes/implemented/feature/2026-08-05-pwsh-ui-bash-parity.zh.md b/.agents/notes/implemented/feature/2026-08-05-pwsh-ui-bash-parity.zh.md
index 75f3a3ddec..ef44e9ff04 100644
--- a/.agents/notes/implemented/feature/2026-08-05-pwsh-ui-bash-parity.zh.md
+++ b/.agents/notes/implemented/feature/2026-08-05-pwsh-ui-bash-parity.zh.md
@@ -6,7 +6,7 @@ Status: implemented
 
 ## Problem
 
-[pwsh 工具与 bash 对齐决策](../../implemented/feature/2026-08-02-pwsh-tool-bash-parity.md) 让 `dsh-tool-pwsh` 在执行、marker 与后台任务上行为可互换，但明确推迟了面向人类的一半：完成的 pwsh 前台调用呈现为通用 `console` 围栏卡片，而 bash 工具的完成调用呈现为带解析退出状态 pill 的 terminal 卡。拥有此缺口的路线图（[Windows 默认改用 pwsh](../../proposed/feature/2026-08-01-windows-pwsh-default.md)）把 "pwsh TUI/GUI 渲染" 列为阶段 2——但 TUI 包已被移除（[`ed30088adb`](https://github.com/deepseek-harness/deepseek-harness/commit/ed30088adb)），Web 表面成为该缺口唯一影响的 UI。
+[pwsh 工具与 bash 对齐决策](../../implemented/feature/2026-08-02-pwsh-tool-bash-parity.md) 让 `dsh-tool-pwsh` 在执行、marker 与后台任务上行为可互换，但明确推迟了面向人类的一半：完成的 pwsh 前台调用呈现为通用 `console` 围栏卡片，而 bash 工具的完成调用呈现为带解析退出状态 pill 的 terminal 卡。拥有此缺口的路线图（[Windows 默认改用 pwsh](../../implemented/feature/2026-08-01-windows-pwsh-default.md)）把 "pwsh TUI/GUI 渲染" 列为阶段 2——但 TUI 包已被移除（[`ed30088adb`](https://github.com/deepseek-harness/deepseek-harness/commit/ed30088adb)），Web 表面成为该缺口唯一影响的 UI。
 
 ## Decision
 
diff --git a/.agents/notes/proposed/feature/2026-08-01-windows-pwsh-default.i18n.yaml b/.agents/notes/proposed/feature/2026-08-01-windows-pwsh-default.i18n.yaml
deleted file mode 100644
index fa7ea8e141..0000000000
--- a/.agents/notes/proposed/feature/2026-08-01-windows-pwsh-default.i18n.yaml
+++ /dev/null
@@ -1,6 +0,0 @@
-# Bilingual-pair consistency record (docs/i18n/README.md): the git blob hash of each
-# 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/proposed/feature/2026-08-01-windows-pwsh-default.md
-2026-08-01-windows-pwsh-default.md: 1c3ccef23bb5cd9bc37237bd69aac2e2c56649a8
-2026-08-01-windows-pwsh-default.zh.md: 3958d21eb8a9d306009b11d6e9806a1654a8958e
diff --git a/.agents/notes/proposed/feature/2026-08-01-windows-pwsh-default.md b/.agents/notes/proposed/feature/2026-08-01-windows-pwsh-default.md
deleted file mode 100644
index 1c3ccef23b..0000000000
--- a/.agents/notes/proposed/feature/2026-08-01-windows-pwsh-default.md
+++ /dev/null
@@ -1,39 +0,0 @@
-# Agent Note: Windows defaults to pwsh (roadmap)
-
-Status: proposed
-
-English | [中文](2026-08-01-windows-pwsh-default.zh.md)
-
-## Problem
-
-The harness's shipped execution profile is bash-first on every platform. Windows hosts must install a bash shim (WSL or Git-Bash) or fall back to the POSIX-only `dsh-bash-local` behavior; the model-facing bash tool teaches the bash dialect, and the TUI/Web surfaces render terminal output in bash-shaped expectations. The first Windows-native foundation shipped in the [pwsh executor and tool decision](../../implemented/feature/2026-08-01-pwsh-tool-and-executor.md): a PowerShell implementation of the `ctx.bash` seam and a parity `pwsh` tool — but nothing yet defaults Windows hosts to them.
-
-## Proposal
-
-Two follow-up stages, each independently shippable. The former stage 2 (bash-tool parity twin) shipped with the [pwsh tool bash parity decision](../../implemented/feature/2026-08-02-pwsh-tool-bash-parity.md): `tool-pwsh` now mirrors `tool-bash` for foreground and background work minus the sandbox surface, shares the `DSH_*` environment through `dsh-bash-env`, and carries a keyless application snapshot of its assembled surface.
-
-1. **Windows default composition** — the shipped CLI compositions mount `dsh-pwsh-local` as the `ctx.bash` executor and `dsh-tool-pwsh` as the model-facing shell tool on Windows hosts (bash unmounted there), while POSIX hosts keep the bash stack. This is a composition/roster decision in `base.cordis.yml` and the surface overlays, gated by platform; it makes the shipped Windows experience PowerShell-native end to end.
-2. **pwsh GUI rendering** — the Web surface renders pwsh calls with the bash-shaped terminal presentation (terminal card with exit-status pill), the counterpart of the bash terminal cards. Shipped in the [pwsh UI presentation matches bash decision](../../implemented/feature/2026-08-05-pwsh-ui-bash-parity.md) with a keyless web lane; the TUI was removed, so no terminal twin remains. A PowerShell-aware presentation beyond bash parity (native path display, `$env:` facts) remains unclaimed.
-
-The stages are ordered by dependency only where one exists: the rendering stage shipped first with the [pwsh UI presentation matches bash decision](../../implemented/feature/2026-08-05-pwsh-ui-bash-parity.md) because it is platform-independent and its keyless web lane runs on any host, while the Windows default composition remains the only unshipped stage. Nothing in this proposal changes POSIX behavior.
-
-## Alternatives considered
-
-**Default Windows to pwsh inside `dsh-bash-local` (one executor, dialect switch).** Rejected for the same reason the executor decision rejected a mode switch: the executor's identity is the shell it spawns, and platform-gated composition is a deployment choice, not an executor config.
-
-**Ship the Windows default in the same change as the executor/tool.** Rejected: the roster change needs its own evidence (what breaks when the shipped Windows tree stops mounting bash, which tools depend on bash semantics), and it belongs to a composition decision with the approval/PTY surface visible.
-
-**Keep bash on Windows via a shim and skip PowerShell defaults.** Rejected: it perpetuates the install-tax and the dialect mismatch the roadmap exists to remove; the shim is a deployment requirement, not a product behavior.
-
-## Acceptance criteria
-
-- A Windows host running the shipped `dsh` TUI/Web gets `pwsh` as its shell tool and PowerShell as the `ctx.bash` executor without configuration, and `bash` is absent from the model-visible roster there.
-- POSIX hosts are byte-for-byte unaffected (same roster, same executor).
-- The shipped-composition e2es assert the platform-gated roster on both families.
-- Stage 1 lands with the keyless pwsh-tool snapshot already in place from the parity change; stage 2 landed with the web `pwsh-terminal` rendering lane (the TUI's removal left no terminal surface to snapshot).
-
-## Risks
-
-- **Bash-dependent composition rows** — any shipped plugin that assumes `bash` semantics (hook bridges executing shell hooks, workspace tooling) must be audited per stage; the audit may force a staged rollout rather than one switch.
-- **Windows CI coverage gap** — unit coverage runs on Linux; Windows-only regressions in the pwsh stack surface through the Windows build/static lane and e2es, which must be extended per stage rather than assumed.
-- **Rendering conventions** — the bash-shaped terminal twin shipped with the Web lane; a PowerShell-aware presentation beyond bash parity (native path display, `$env:` facts) remains a UI design decision with snapshot surface, deferred with stage 1.
diff --git a/.agents/notes/proposed/feature/2026-08-01-windows-pwsh-default.zh.md b/.agents/notes/proposed/feature/2026-08-01-windows-pwsh-default.zh.md
deleted file mode 100644
index 3958d21eb8..0000000000
--- a/.agents/notes/proposed/feature/2026-08-01-windows-pwsh-default.zh.md
+++ /dev/null
@@ -1,39 +0,0 @@
-# Agent Note: Windows 默认改用 pwsh（路线图）
-
-Status: proposed
-
-[English](2026-08-01-windows-pwsh-default.md) | 中文
-
-## 问题
-
-harness 交付的执行画像在每个平台都是 bash 优先。Windows 主机必须安装 bash 垫片（WSL 或 Git-Bash），或退回到仅 POSIX 的 `dsh-bash-local` 行为；面向模型的 bash 工具教的是 bash 方言，TUI/Web 表面以 bash 形状的预期渲染终端输出。第一块 Windows 原生基础已随 [pwsh 执行器与工具决策](../../implemented/feature/2026-08-01-pwsh-tool-and-executor.md) 交付：`ctx.bash` seam 的 PowerShell 实现与对等的 `pwsh` 工具——但还没有任何东西让 Windows 主机默认使用它们。
-
-## 提案
-
-两个阶段，各自可独立交付。原阶段 2（bash 工具对等孪生）已随 [pwsh 工具与 bash 对齐决策](../../implemented/feature/2026-08-02-pwsh-tool-bash-parity.md) 交付：`tool-pwsh` 现在在前台与后台工作（减 sandbox 面）上镜像 `tool-bash`，通过 `dsh-bash-env` 共享 `DSH_*` 环境，并携带其组装表面的 keyless 应用快照。
-
-1. **Windows 默认组合**——交付的 CLI 组合在 Windows 主机上挂载 `dsh-pwsh-local` 作为 `ctx.bash` 执行器、`dsh-tool-pwsh` 作为面向模型的 shell 工具（那里不挂载 bash），POSIX 主机保持 bash 栈。这是 `base.cordis.yml` 与 surface 覆盖层里按平台门控的组合/清单决策；它让交付的 Windows 体验端到端 PowerShell 原生。
-2. **pwsh GUI 渲染**——Web 表面以 bash 形状的终端呈现渲染 pwsh 调用（带退出状态 pill 的 terminal 卡），即 bash 终端卡片的对应物。已随 [pwsh UI 呈现与 bash 对齐决策](../../implemented/feature/2026-08-05-pwsh-ui-bash-parity.md) 及 keyless web 通道交付；TUI 已移除，不再有终端孪生。超出 bash 对齐的 PowerShell 感知呈现（原生路径显示、`$env:` 实情）仍无人认领。
-
-各阶段仅在有依赖关系时排序：渲染阶段已随 [pwsh UI 呈现与 bash 对齐决策](../../implemented/feature/2026-08-05-pwsh-ui-bash-parity.md) 先行交付（平台无关，其 keyless web 通道可在任意宿主运行），而 Windows 默认组合仍是唯一未交付的阶段。本提案不改变任何 POSIX 行为。
-
-## 备选方案
-
-**在 `dsh-bash-local` 内部让 Windows 默认 pwsh（一个执行器，方言开关）。** 否决，理由与执行器决策否决模式开关相同：执行器的身份就是它 spawn 的 shell，而按平台门控的组合是部署选择，不是执行器配置。
-
-**把 Windows 默认与执行器/工具一起交付。** 否决：清单变更需要自己的证据（交付的 Windows 树停挂 bash 后什么会坏、哪些工具依赖 bash 语义），并且它属于带批准/PTY 表面可见的组合决策。
-
-**用垫片在 Windows 上保留 bash，跳过 PowerShell 默认。** 否决：这延续了安装税与路线图要消除的方言错配；垫片是部署要求，不是产品行为。
-
-## 验收标准
-
-- 运行交付版 `dsh` TUI/Web 的 Windows 主机无需配置即获得 `pwsh` 作为其 shell 工具、PowerShell 作为 `ctx.bash` 执行器，且那里的模型可见清单中没有 `bash`。
-- POSIX 主机逐字节不受影响（清单相同，执行器相同）。
-- 交付组合 e2e 在两个平台族上断言按平台门控的清单。
-- 阶段 1 落地时，parity 变更带来的 keyless pwsh 工具快照已经就位；阶段 2 已随 web `pwsh-terminal` 渲染通道落地（TUI 的移除让终端表面无快照可做）。
-
-## 风险
-
-- **依赖 bash 的组合行**——任何假设 bash 语义的交付插件（执行 shell hooks 的 hooks 桥、工作区工具）必须按阶段审计；审计可能迫使分阶段推出而非一次切换。
-- **Windows CI 覆盖缺口**——单元覆盖在 Linux 上运行；pwsh 栈里仅 Windows 的回归通过 Windows 构建/静态通道与 e2e 浮出，必须按阶段扩展而不是想当然。
-- **渲染约定**——bash 形状的终端孪生已随 web 通道交付；超出 bash 对齐的 PowerShell 感知呈现（原生路径显示、`$env:` 实情）仍是带快照表面的 UI 设计决策，随阶段 1 一起延期。
diff --git a/apps/cli/package.json b/apps/cli/package.json
index 87677ce1f9..11078458e6 100644
--- a/apps/cli/package.json
+++ b/apps/cli/package.json
@@ -24,11 +24,13 @@
     "@deepseek-ai/dsh-paths": "workspace:^",
     "@deepseek-ai/dsh-pty": "workspace:^",
     "@deepseek-ai/dsh-pty-local": "workspace:^",
+    "@deepseek-ai/dsh-pwsh-local": "workspace:^",
     "@deepseek-ai/dsh-session-reference": "workspace:^",
     "@deepseek-ai/dsh-tmux-context": "workspace:^",
     "@deepseek-ai/dsh-tool-ask-user": "workspace:^",
     "@deepseek-ai/dsh-tool-bash-persistent": "workspace:^",
     "@deepseek-ai/dsh-tool-cordis": "workspace:^",
+    "@deepseek-ai/dsh-tool-pwsh": "workspace:^",
     "@deepseek-ai/dsh-web-app": "workspace:^",
     "commander": "^15.0.0",
     "cordis": "^4.0.0-rc.7",
diff --git a/apps/cli/src/dump-config.ts b/apps/cli/src/dump-config.ts
index 9de7a55f60..29605878de 100644
--- a/apps/cli/src/dump-config.ts
+++ b/apps/cli/src/dump-config.ts
@@ -15,6 +15,7 @@ import {
   type ConfigDumpLayer,
 } from '@deepseek-ai/dsh-app-boot'
 import { homePatchPath, prepareProfile, PROFILE_ROOT_FILENAME } from './profile-boot.ts'
+import { resolveWindowsShellLayer } from './windows-shell.ts'
 
 const NAME = 'dsh'
 
@@ -33,6 +34,12 @@ export function runDumpConfig(profile: string, defaultOnly: boolean, patches: re
     label: layer.packageName,
     patches: layer.patches,
   }))
+  // The win32 shell platform layer rides between bundles and user layers,
+  // exactly where the boot applies it.
+  const windowsShellLayer = resolveWindowsShellLayer(process.platform, loaded.layers, NAME)
+  if (windowsShellLayer !== undefined) {
+    layers.push({ label: windowsShellLayer.label, patches: windowsShellLayer.patches })
+  }
   if (!defaultOnly) {
     if (existsSync(loaded.patchPath)) {
       layers.push({ label: loaded.patchPath, patches: loaded.patches })
diff --git a/apps/cli/src/profile-boot.ts b/apps/cli/src/profile-boot.ts
index b69a938213..7115f1208a 100644
--- a/apps/cli/src/profile-boot.ts
+++ b/apps/cli/src/profile-boot.ts
@@ -27,6 +27,7 @@ import {
 import { resolveDshHome } from '@deepseek-ai/dsh-paths'
 import type { HeadlessIo } from '@deepseek-ai/dsh-headless'
 import { createProcessShutdown, type ProcessShutdown } from './process-shutdown.ts'
+import { resolveWindowsShellLayer } from './windows-shell.ts'
 
 const NAME = 'dsh'
 
@@ -103,6 +104,8 @@ interface ComposedProfile {
   profile: Profile
   /** Bundle layers concatenated — the part below the user layers on a live reload. */
   bundlePatches: PatchOptions[]
+  /** The win32 shell platform layer (the base bundle's `windows.cordis.patch.yml`), between bundles and user layers. */
+  windowsShellPatches: PatchOptions[]
   /** The home-level user layer (`$DSH_HOME/cordis.patch.yml`), applied after the profile's own. */
   homePatches: PatchOptions[]
   /** Layers above the user layers on a live reload: --patch overlays, flag patches, the telemetry switch. */
@@ -117,16 +120,23 @@ interface ComposedProfile {
 
 /** The full patch stack of one composed profile, in application order. */
 function allPatches(composed: ComposedProfile): PatchOptions[] {
-  return [...composed.bundlePatches, ...composed.profile.patches, ...composed.homePatches, ...composed.overlayAndFlags]
+  return [
+    ...composed.bundlePatches,
+    ...composed.windowsShellPatches,
+    ...composed.profile.patches,
+    ...composed.homePatches,
+    ...composed.overlayAndFlags,
+  ]
 }
 
 /**
  * Load `name` and compose its effective patch stack: bundle layers in
- * `dsh.profile.bundles` order, the profile's user layer, the home-level user layer
- * (`$DSH_HOME/cordis.patch.yml` — machine-local preferences that apply to
- * every profile, so it outranks the per-profile layer), `--patch` overlays,
- * then flag patches derived from the composed rows, then the telemetry
- * switch.
+ * `dsh.profile.bundles` order, the win32 shell platform layer (when the host
+ * is Windows), the
+ * profile's user layer, the home-level user layer (`$DSH_HOME/cordis.patch.yml`
+ * — machine-local preferences that apply to every profile, so it outranks the
+ * per-profile layer), `--patch` overlays, then flag patches derived from the
+ * composed rows, then the telemetry switch.
  * @param name - the profile name.
  * @param patchFiles - `--patch` overlay paths, in argv order.
  * @param deriveFlagPatches - launcher hook turning composed rows into flag patches.
@@ -141,14 +151,15 @@ function composeProfile(
   const homePatches = loadOptionalPatches(NAME, homePatchPath()) ?? []
   const overlays = patchFiles.flatMap(file => loadOverlayPatches(NAME, resolve(file)))
   const bundlePatches = profile.layers.flatMap(layer => layer.patches)
+  const windowsShellPatches = resolveWindowsShellLayer(process.platform, profile.layers, NAME)?.patches ?? []
   const rows = new Map<string, { name?: string; config?: unknown }>()
-  for (const row of composeEntries([bundlePatches, profile.patches, homePatches, overlays])) {
+  for (const row of composeEntries([bundlePatches, windowsShellPatches, profile.patches, homePatches, overlays])) {
     if (typeof row.id === 'string') rows.set(row.id, row)
   }
   const overlayAndFlags = [...overlays, ...deriveFlagPatches(rows)]
   const telemetryPatch = resolveTelemetryPatch(process.env.DSH_TELEMETRY_DISABLED, rows.has(TELEMETRY_ROW_ID))
   if (telemetryPatch !== undefined) overlayAndFlags.push(telemetryPatch)
-  return { profile, bundlePatches, homePatches, overlayAndFlags, rows }
+  return { profile, bundlePatches, windowsShellPatches, homePatches, overlayAndFlags, rows }
 }
 
 /** Options for {@link runProfile}. */
@@ -215,6 +226,7 @@ export async function runProfile(options: RunProfileOptions): Promise<{ ctx: Con
   // removing the override could never revert the row to the bundle default.
   const composeLive = (): PatchOptions[] => structuredClone([
     ...composed.bundlePatches,
+    ...composed.windowsShellPatches,
     ...loadOptionalPatches(NAME, composed.profile.patchPath) ?? [],
     ...loadOptionalPatches(NAME, homePatchPath()) ?? [],
     ...composed.overlayAndFlags,
diff --git a/apps/cli/src/windows-shell.ts b/apps/cli/src/windows-shell.ts
new file mode 100644
index 0000000000..425699ef4f
--- /dev/null
+++ b/apps/cli/src/windows-shell.ts
@@ -0,0 +1,55 @@
+/**
+ * The Windows shell platform layer: on win32 hosts the shipped profile
+ * compositions swap the POSIX-only bash stack for the PowerShell stack
+ * (`@deepseek-ai/dsh-pwsh-local` + `@deepseek-ai/dsh-tool-pwsh`), matching
+ * the Windows-pwsh-default roadmap. The layer is the base bundle's
+ * `windows.cordis.patch.yml`, injected by the launcher between the bundle
+ * layers and the user layers so a user patch can still override it — the
+ * only override channel is composition config, like every other roster
+ * decision. POSIX hosts never receive the layer.
+ * @module @deepseek-ai/dsh/windows-shell
+ */
+
+import { existsSync } from 'node:fs'
+import { join } from 'node:path'
+import type { PatchOptions } from '@cordisjs/plugin-include'
+import { loadOverlayPatches, type ProfileLayer } from '@deepseek-ai/dsh-app-boot'
+
+/** The base bundle whose package carries the Windows shell patch. */
+export const BASE_BUNDLE = '@deepseek-ai/dsh-base'
+
+/** The Windows shell patch filename inside the base bundle package. */
+export const WINDOWS_SHELL_PATCH_FILENAME = 'windows.cordis.patch.yml'
+
+/** One Windows shell platform layer: its patch file and parsed patches. */
+export interface WindowsShellLayer {
+  /** The patch file path, used as the config-dump provenance label. */
+  label: string
+  /** The parsed patch entries, applied after the bundle layers. */
+  patches: PatchOptions[]
+}
+
+/**
+ * Resolve the Windows shell platform layer for a profile composition.
+ * @param platform - the host platform (`process.platform` at call sites).
+ * @param layers - the profile's bundle layers, in application order.
+ * @param binName - the diagnostic prefix on thrown errors (`dsh`).
+ * @returns the pwsh layer on win32, else `undefined`. A custom profile that
+ *   mounts no base bundle is skipped (it owns its shell stack); a base
+ *   bundle that ships no Windows shell patch fails loud — the shipped
+ *   package always carries it, so a miss is a broken installation.
+ */
+export function resolveWindowsShellLayer(
+  platform: NodeJS.Platform,
+  layers: readonly ProfileLayer[],
+  binName: string,
+): WindowsShellLayer | undefined {
+  if (platform !== 'win32') return undefined
+  const base = layers.find(layer => layer.packageName === BASE_BUNDLE)
+  if (base === undefined) return undefined
+  const label = join(base.packageDir, WINDOWS_SHELL_PATCH_FILENAME)
+  if (!existsSync(label)) {
+    throw new Error(`${binName}: ${BASE_BUNDLE} ships no ${WINDOWS_SHELL_PATCH_FILENAME}`)
+  }
+  return { label, patches: loadOverlayPatches(binName, label) }
+}
diff --git a/apps/cli/tests/windows-shell.spec.ts b/apps/cli/tests/windows-shell.spec.ts
new file mode 100644
index 0000000000..f0cfddbaae
--- /dev/null
+++ b/apps/cli/tests/windows-shell.spec.ts
@@ -0,0 +1,64 @@
+import { afterEach, describe, expect, it } from 'vitest'
+import { mkdtempSync, writeFileSync, rmSync, mkdirSync } from 'node:fs'
+import { tmpdir } from 'node:os'
+import { join } from 'node:path'
+import type { ProfileLayer } from '@deepseek-ai/dsh-app-boot'
+import {
+  BASE_BUNDLE,
+  resolveWindowsShellLayer,
+  WINDOWS_SHELL_PATCH_FILENAME,
+} from '../src/windows-shell.ts'
+
+const WINDOWS_PATCH = `- id: bash-sandbox
+  disabled: true
+- insert:
+    - id: pwsh-local
+      name: '@deepseek-ai/dsh-pwsh-local'
+`
+
+/** One fake bundle layer rooted in a temp directory. */
+function fakeLayer(packageName: string, dir: string): ProfileLayer {
+  return { packageName, packageDir: dir, patchPath: join(dir, 'cordis.patch.yml'), patches: [] }
+}
+
+/** A base bundle layer whose package carries the Windows shell patch. */
+function baseLayerWithPatch(dir: string): ProfileLayer {
+  writeFileSync(join(dir, WINDOWS_SHELL_PATCH_FILENAME), WINDOWS_PATCH)
+  return fakeLayer(BASE_BUNDLE, dir)
+}
+
+describe('resolveWindowsShellLayer', () => {
+  let base: string
+  afterEach(() => { if (base !== undefined) rmSync(base, { recursive: true, force: true }) })
+  const tempBase = (): string => {
+    base = mkdtempSync(join(tmpdir(), 'dsh-windows-shell-'))
+    return base
+  }
+
+  it('never applies on POSIX hosts', () => {
+    expect(resolveWindowsShellLayer('linux', [baseLayerWithPatch(tempBase())], 'dsh')).toBeUndefined()
+    expect(resolveWindowsShellLayer('darwin', [baseLayerWithPatch(tempBase())], 'dsh')).toBeUndefined()
+  })
+
+  it('defaults Windows hosts to the pwsh platform layer', () => {
+    const layer = resolveWindowsShellLayer('win32', [baseLayerWithPatch(tempBase())], 'dsh')
+    expect(layer).toBeDefined()
+    expect(layer?.label.endsWith(WINDOWS_SHELL_PATCH_FILENAME)).toBe(true)
+    expect(layer?.patches).toEqual([
+      { id: 'bash-sandbox', disabled: true },
+      { insert: [{ id: 'pwsh-local', name: '@deepseek-ai/dsh-pwsh-local' }] },
+    ])
+  })
+
+  it('skips custom profiles without a base bundle', () => {
+    const other = fakeLayer('@deepseek-ai/dsh-custom', tempBase())
+    expect(resolveWindowsShellLayer('win32', [other], 'dsh')).toBeUndefined()
+  })
+
+  it('fails loud when the base bundle ships no Windows shell patch', () => {
+    const base = tempBase()
+    mkdirSync(base, { recursive: true })
+    expect(() => resolveWindowsShellLayer('win32', [fakeLayer(BASE_BUNDLE, base)], 'dsh'))
+      .toThrow(/@deepseek-ai\/dsh-base ships no windows\.cordis\.patch\.yml/)
+  })
+})
diff --git a/packages/bundle/base/README.i18n.yaml b/packages/bundle/base/README.i18n.yaml
index 2ae7df0bdc..a47ac9cbc7 100644
--- a/packages/bundle/base/README.i18n.yaml
+++ b/packages/bundle/base/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/bundle/base/README.md
-README.md: 301d397d4c87687b382665cf63af47ab5e3f85be
-README.zh.md: f007bc817b6cbad84725fe8abe72549cf67d8cd7
+README.md: a4f220c956f7f67d7810827d4488d54a071ad3d6
+README.zh.md: eaf96f8c0640481163e7a1c1533a07e35ecc294f
diff --git a/packages/bundle/base/README.md b/packages/bundle/base/README.md
index 301d397d4c..a4f220c956 100644
--- a/packages/bundle/base/README.md
+++ b/packages/bundle/base/README.md
@@ -2,7 +2,9 @@
 
 English | [中文](README.zh.md)
 
-The shared dsh core as a profile bundle: [`cordis.patch.yml`](cordis.patch.yml) inserts every base plugin row — model adapters, tools, persistence, policy, settings/credentials, repository Plugins, telemetry — over the empty profile root, as the first layer of every profile's `dsh.profile.bundles` list. Later bundle layers (e.g. [`dsh-web-app`](../web-app/README.md)) and the user's profile `cordis.patch.yml` override these rows by id; a patch replaces a row's whole `config`, so mode-specific values live in mode bundles, not here. The package has no runtime API; the profile composer resolves the patch through the `dsh.bundle.patch` manifest field, never through code.
+The shared dsh core as a profile bundle: [`cordis.patch.yml`](cordis.patch.yml) inserts every base plugin row — model adapters, tools, persistence, policy, settings/credentials, repository Plugins, telemetry — over the empty profile root, as the first layer of every profile's `dsh.profile.bundles` list. Later bundle layers (e.g. [`dsh-web-app`](../web-app/README.md)) and the user's profile `cordis.patch.yml` override these rows by id; a patch replaces a row's whole `config`, so mode-specific values live in mode bundles, not here. The package has no runtime API; the profile composer resolves the universal patch through the `dsh.bundle.patch` manifest field, and the launcher reads the Windows platform layer below from code on win32 hosts.
+
+Windows hosts booting a shipped profile additionally receive [`windows.cordis.patch.yml`](windows.cordis.patch.yml): it disables the POSIX-only bash executor/tool and the permission stack (dsh-permission requires a confining executor), and inserts the PowerShell executor and tool (`@deepseek-ai/dsh-pwsh-local`, `@deepseek-ai/dsh-tool-pwsh`). The launcher applies it between the bundle layers and the user layers on win32 hosts; a Windows host that prefers the bash stack overrides these rows through its profile or home `cordis.patch.yml`. POSIX hosts never receive it.
 
 The row set and its rationale are documented inline in the patch file; the [generated composition graph](../../../apps/cli/composition.md) renders it.
 
@@ -17,3 +19,4 @@ None directly; each inserted row's package owns its effect.
 ## Known Limitations and Deferred Work
 
 - **A patch replaces whole row configs** — profile overrides must restate every field a row keeps; there is no deep-merge layer.
+- **Windows loses the permission switcher** — `dsh-permission` hard-requires a confining `ctx.bash` executor, so the Windows platform layer disables `permission`/`ui-permission` with the bash stack. The fs tools keep the sandbox policy and the approval service, so file confinement and escalation still apply on Windows.
diff --git a/packages/bundle/base/README.zh.md b/packages/bundle/base/README.zh.md
index f007bc817b..eaf96f8c06 100644
--- a/packages/bundle/base/README.zh.md
+++ b/packages/bundle/base/README.zh.md
@@ -2,7 +2,9 @@
 
 [English](README.md) | 中文
 
-以 profile 组合包形式交付的共享 dsh 核心：[`cordis.patch.yml`](cordis.patch.yml) 在空的 profile 根之上插入全部基础插件行——模型适配器、工具、持久化、策略、settings／credentials、repository 插件、遥测——作为每个 profile 的 `dsh.profile.bundles` 列表中的第一层。后续的组合包层（例如 [`dsh-web-app`](../web-app/README.md)）和用户 profile 的 `cordis.patch.yml` 按 id 覆盖这些行；patch 会替换目标行的整个 `config`，因此模式专属的值放在各模式组合包中，而不是这里。该包没有运行时 API；profile 组合器通过 manifest（元数据清单）的 `dsh.bundle.patch` 字段解析 patch，绝不通过代码。
+以 profile 组合包形式交付的共享 dsh 核心：[`cordis.patch.yml`](cordis.patch.yml) 在空的 profile 根之上插入全部基础插件行——模型适配器、工具、持久化、策略、settings／credentials、repository 插件、遥测——作为每个 profile 的 `dsh.profile.bundles` 列表中的第一层。后续的组合包层（例如 [`dsh-web-app`](../web-app/README.md)）和用户 profile 的 `cordis.patch.yml` 按 id 覆盖这些行；patch 会替换目标行的整个 `config`，因此模式专属的值放在各模式组合包中，而不是这里。该包没有运行时 API；profile 组合器通过 manifest（元数据清单）的 `dsh.bundle.patch` 字段解析通用 patch，启动器在 win32 主机上通过代码读取下面的 Windows 平台层。
+
+启动交付 profile 的 Windows 主机还会额外收到 [`windows.cordis.patch.yml`](windows.cordis.patch.yml)：它禁用仅 POSIX 的 bash 执行器/工具与权限栈（dsh-permission 要求有限权能力的执行器），并插入 PowerShell 执行器与工具（`@deepseek-ai/dsh-pwsh-local`、`@deepseek-ai/dsh-tool-pwsh`）。启动器在 win32 主机上把它应用于 bundle 层与用户层之间；偏好 bash 栈的 Windows 主机通过其 profile 或 home 的 `cordis.patch.yml` 覆盖这些行。POSIX 主机永远不会收到它。
 
 行集合及其设计依据以行内注释写在 patch 文件里；[生成的组合图](../../../apps/cli/composition.md)负责渲染它。
 
@@ -17,3 +19,4 @@
 ## 已知限制与延期工作
 
 - **patch 会替换整行 `config`**：profile 覆盖必须重述该行需要保留的每个字段；不存在深度合并层。
+- **Windows 上失去权限切换器**：`dsh-permission` 硬性要求有限权能力的 `ctx.bash` 执行器，因此 Windows 平台层随 bash 栈一起禁用 `permission`/`ui-permission`。fs 工具保留 sandbox 策略与批准服务，Windows 上的文件限制与升级仍然生效。
diff --git a/packages/bundle/base/package.json b/packages/bundle/base/package.json
index 95e169cabb..cb2b7178f7 100644
--- a/packages/bundle/base/package.json
+++ b/packages/bundle/base/package.json
@@ -16,6 +16,7 @@
       "default": "./lib/invariant.js"
     },
     "./cordis.patch.yml": "./cordis.patch.yml",
+    "./windows.cordis.patch.yml": "./windows.cordis.patch.yml",
     "./src/*": "./src/*",
     "./package.json": "./package.json"
   },
@@ -23,6 +24,7 @@
     "lib/index.js",
     "lib/invariant.js",
     "cordis.patch.yml",
+    "windows.cordis.patch.yml",
     "lib/types/**/*.d.ts"
   ],
   "license": "BSD-3-Clause",
@@ -54,6 +56,7 @@
     "@deepseek-ai/dsh-llm-retry": "workspace:^",
     "@deepseek-ai/dsh-permission": "workspace:^",
     "@deepseek-ai/dsh-plan-mode": "workspace:^",
+    "@deepseek-ai/dsh-pwsh-local": "workspace:^",
     "@deepseek-ai/dsh-repeat-tool-guard": "workspace:^",
     "@deepseek-ai/dsh-repository-plugin": "workspace:^",
     "@deepseek-ai/dsh-sandbox-local": "workspace:^",
@@ -82,6 +85,7 @@
     "@deepseek-ai/dsh-tool-fs": "workspace:^",
     "@deepseek-ai/dsh-tool-fs-search": "workspace:^",
     "@deepseek-ai/dsh-tool-goal": "workspace:^",
+    "@deepseek-ai/dsh-tool-pwsh": "workspace:^",
     "@deepseek-ai/dsh-tool-ralph": "workspace:^",
     "@deepseek-ai/dsh-tool-skill": "workspace:^",
     "@deepseek-ai/dsh-tool-str-replace-editor": "workspace:^",
diff --git a/packages/bundle/base/windows.cordis.patch.yml b/packages/bundle/base/windows.cordis.patch.yml
new file mode 100644
index 0000000000..59d5e81582
--- /dev/null
+++ b/packages/bundle/base/windows.cordis.patch.yml
@@ -0,0 +1,34 @@
+# The dsh-base Windows platform layer: applied by the dsh launcher on win32
+# hosts, between the bundle layers and the user layers, replacing the
+# POSIX-only bash stack with the PowerShell stack. The launcher reads THIS
+# file from the base bundle package (never through dsh.bundle.patch — that
+# field names the one universal layer). A Windows host that prefers bash
+# overrides the rows here through its profile or home cordis.patch.yml.
+#
+# Windows hosts cannot run the shipped bash executor (POSIX-only: hardcoded
+# `bash -c` argv and process-group semantics), so the shipped Windows
+# experience is PowerShell-native: pwsh-local backs `ctx.bash` and tool-pwsh
+# is the model-facing shell tool. dsh-permission requires a confining
+# executor (its presets bundle a sandbox mode the unconfined pwsh executor
+# cannot honor), so the permission service and its client knob leave the
+# Windows roster with the bash stack; the fs tools keep the sandbox policy
+# and the approval service, so file confinement and escalation still apply.
+
+- id: bash-sandbox
+  disabled: true
+
+- id: tool-bash
+  disabled: true
+
+- id: permission
+  disabled: true
+
+- id: ui-permission
+  disabled: true
+
+- insert:
+    - id: pwsh-local
+      name: '@deepseek-ai/dsh-pwsh-local'
+
+    - id: tool-pwsh
+      name: '@deepseek-ai/dsh-tool-pwsh'
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index b826046bea..453109bcae 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -161,6 +161,9 @@ importers:
       '@deepseek-ai/dsh-pty-local':
         specifier: workspace:^
         version: link:../../packages/pty/pty-local
+      '@deepseek-ai/dsh-pwsh-local':
+        specifier: workspace:^
+        version: link:../../packages/bash/pwsh-local
       '@deepseek-ai/dsh-session-reference':
         specifier: workspace:^
         version: link:../../packages/context/session-reference
@@ -176,6 +179,9 @@ importers:
       '@deepseek-ai/dsh-tool-cordis':
         specifier: workspace:^
         version: link:../../packages/cordis/tool-cordis
+      '@deepseek-ai/dsh-tool-pwsh':
+        specifier: workspace:^
+        version: link:../../packages/bash/tool-pwsh
       '@deepseek-ai/dsh-web-app':
         specifier: workspace:^
         version: link:../../packages/bundle/web-app
@@ -922,6 +928,9 @@ importers:
       '@deepseek-ai/dsh-plan-mode':
         specifier: workspace:^
         version: link:../../plan/plan-mode
+      '@deepseek-ai/dsh-pwsh-local':
+        specifier: workspace:^
+        version: link:../../bash/pwsh-local
       '@deepseek-ai/dsh-repeat-tool-guard':
         specifier: workspace:^
         version: link:../../guard/repeat-tool-guard
@@ -1006,6 +1015,9 @@ importers:
       '@deepseek-ai/dsh-tool-goal':
         specifier: workspace:^
         version: link:../../goal/tool-goal
+      '@deepseek-ai/dsh-tool-pwsh':
+        specifier: workspace:^
+        version: link:../../bash/tool-pwsh
       '@deepseek-ai/dsh-tool-ralph':
         specifier: workspace:^
         version: link:../../workflow/tool-ralph