DSH on Windows：每次工具调用少等四秒

DeepSeek Harness 每次起子进程，都会把命令包成 pwsh -NoLogo -NoProfile -NonInteractive -Command ""。

钩子是每次工具调用前后自动跑的小脚本，管权限检查、提示注入、删除拦截这些。它们本身只是一条「可执行文件 + 参数」的命令，用不着 shell。这层包装在 Windows 上能让每个钩子多花几秒，而钩子每调一次工具就跑一遍。

插件做的事很简单：命令不需要 shell 时直接交给系统创建进程，其余照旧走 pwsh。装完之后，每次工具调用少等约四秒。

效果

同一台机器、同一个 DSH 版本、同样一串工具调用：

	钩子耗时
官方原版	约 4300 ms
装插件后	约 240 ms

钩子每次工具调用都要跑一遍，所以体感差别是每次操作省四秒多。

这两个数只在一种环境测过：Windows 11、DSH 0.2.1-rc.2、单机。你的机器可能不一样，见下面的「先量一下」。

先量一下

装之前先看看你现在有多慢。让它跑一次工具调用（比如让助手改一个文件），掐一下从发出到返回的秒数。

本来就在半秒内：这个插件对你没用，别装。
一两秒以上：值得试。

插件本身是保守的——只有「首 token 是绝对路径、没有 shell 元字符」才直连，其余一律退回原来的 pwsh 路径，命令语义不变。

安装（推荐：插件）

插件不改 app.asar，DSH 升级也不失效。

把 plugin/index.js 放到：

%USERPROFILE%\.dsh\profiles\desktop\plugins\dsh-pwsh-fast\index.js

在 %USERPROFILE%\.dsh\profiles\desktop\cordis.patch.yml 末尾加一段（路径里的用户名换成你的）：

- insert:
    - id: "dsh-pwsh-fast"
      name: "file:///C:/Users//.dsh/profiles/desktop/plugins/dsh-pwsh-fast/index.js"

重启 DSH。

想确认有没有生效，把 index.js 里的 DEBUG 改成 true，重启后跑几个工具调用，同目录会出现 pwsh-fast.log，里面会写哪些命令走了直连、哪些退回。

卸载

从 cordis.patch.yml 删掉那一段，重启，就回到原样。app.asar 从头到尾没被改过。

备选：改 app.asar

如果你的 DSH 版本拿不到 PwshLocalExecutor（插件启动时会静默跳过），可以改用 install.py 直接改 app.asar。

python install.py            # 只看，不改
python install.py install    # 备份后安装
python install.py revert     # 从备份恢复

脚本会做这些：

读目标文件的 SHA-256。与官方原版一致才继续；
与「已装补丁」的指纹一致就直接退出；
与两个都不一致，说明 DSH 版本变了，拒绝执行；
装之前把整个 app.asar 复制成 app.asar.bak-；
新文件先写成 app.asar.new，校验头部结构，通过才替换。

改 app.asar 前必须先完全退出 DSH，文件被占用时无法替换。

它做了什么

插件和 install.py 改的是同一处逻辑。

文件：dsh/node_modules/@deepseek-ai/dsh-pwsh-local/lib/index.js

内容：PwshLocalExecutor.prototype.argv(spec) 原本无条件返回 pwsh 包装的 argv。现在先调一次 splitSimpleCommand(command)，切成 argv 就直连；切不了就原样回退。

切不了的情况：

管道、重定向、;、$、反引号、#
换行或回车
弯引号（PowerShell 认、切词器不认）
引号不配对
首 token 不是绝对路径
目标是 .cmd / .bat / .ps1（这些必须经 shell）
参数里带 --%

没有改超时、缓冲区、退出码处理。

已知边界

退出码：直连保留原退出码；经 pwsh 包装时 2 和 7 会被转成 1。DSH 只把 2 当 block 语义、0 当解析 JSON。查过 16041 次钩子调用，exit 2 一次都没出现。
大输出：2000 行完整返回，尾部标记在。
版本绑定：install.py 按文件指纹认版本，DSH 升级后指纹会变，脚本会拒绝执行。插件不绑版本，升级后照常工作。

许可

DSH on Windows: four seconds off every tool call

Every time DeepSeek Harness spawns a process, it wraps the command as pwsh -NoLogo -NoProfile -NonInteractive -Command "".

Hooks are the small scripts that run around every tool call — permission checks, prompt injection, the delete guard. Each one is just an executable plus arguments; it doesn't need a shell. On Windows that wrapper can add seconds to every hook, and a hook runs on every tool call.

This plugin hands such commands straight to the OS and falls back to pwsh for everything else. The result: about four seconds less waiting per tool call.

Powered by DSH — a plugin, not a fork.

Result

Same machine, same DSH version, same sequence of tool calls:

	Hook time
Stock DSH	~4300 ms
With plugin	~240 ms

Hooks run on every tool call, so in practice this saves about four seconds per operation.

These numbers were measured in one environment only: Windows 11, DSH 0.2.1-rc.2, single machine. Yours may differ — see "Measure first".

Measure first

Before installing, check how slow you actually are. Run one tool call (ask the assistant to edit a file, for example) and time it from request to response.

Under half a second: the plugin won't help you, skip it.
A second or more: worth trying.

The plugin is conservative. It only goes direct when the first token is an absolute path and no shell metacharacter is present; everything else returns to the original pwsh path, so command semantics don't change.

Install (plugin, recommended)

The plugin never touches app.asar, so DSH upgrades won't wipe it.

Copy plugin/index.js to:

%USERPROFILE%\.dsh\profiles\desktop\plugins\dsh-pwsh-fast\index.js

Append this to %USERPROFILE%\.dsh\profiles\desktop\cordis.patch.yml, replacing the username:

- insert:
    - id: "dsh-pwsh-fast"
      name: "file:///C:/Users//.dsh/profiles/desktop/plugins/dsh-pwsh-fast/index.js"

Restart DSH.

To confirm it's active, set DEBUG to true in index.js and restart. After a few tool calls, pwsh-fast.log will appear next to the file, listing which commands went direct and which fell back.

Uninstall

Remove that block from cordis.patch.yml and restart. app.asar was never modified.

Alternative: patch app.asar

If your DSH version doesn't expose PwshLocalExecutor (the plugin exits silently), use install.py instead.

python install.py            # check only
python install.py install    # back up, then patch
python install.py revert     # restore from backup

What the script does:

Reads the SHA-256 of the target file. Proceeds only if it matches the stock build.
Exits immediately if the file already matches the patched fingerprint.
Refuses to run if neither matches — that means DSH was upgraded.
Copies the whole app.asar to app.asar.bak- first.
Writes the new file as app.asar.new, validates the header structure, then swaps it in.

DSH must be fully closed before patching; the file is locked while it runs.

What it changes

The plugin and install.py implement the same logic.

File: dsh/node_modules/@deepseek-ai/dsh-pwsh-local/lib/index.js

PwshLocalExecutor.prototype.argv(spec) originally returned the pwsh-wrapped argv unconditionally. It now calls splitSimpleCommand(command) first: if the command splits into argv, it goes direct; otherwise it falls back unchanged.

When it refuses to go direct:

Pipes, redirection, ;, $, backticks, #
Newlines or carriage returns
Smart quotes (PowerShell treats them as quotes, the tokenizer doesn't)
Unbalanced quotes
First token is not an absolute path
Target is .cmd / .bat / .ps1 (these need a shell)
Any argument contains --%

Timeouts, buffers and exit-code handling are untouched.

Known limits

Exit codes: direct execution preserves the original code; through pwsh, 2 and 7 are rewritten to 1. DSH only treats 2 as a block signal and 0 as "parse JSON". Across 16,041 hook invocations on the test machine, exit 2 never occurred.
Large output: 2,000 lines came back complete, tail marker intact.
Version pinning: install.py identifies versions by file fingerprint and refuses to run after a DSH upgrade. The plugin isn't version-bound and keeps working.

dsh-pwsh-fast

Install

README