dsh-env-switcher

> One-click Windows / WSL2 environment switcher for DeepSeek Harness (coexistence mode)

A DeepSeek Harness (DSH) plugin that switches freely between the native Windows environment and the WSL2 (Linux) environment from the web UI with

a | Windows | WSL | segmented selector — both environments run

simultaneously and independently, and switching never kills any process.

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🧠 Motivation

This project grew out of a practical observation during development:

> DeepSeek V4 Pro GA performs better in a Linux environment.

In side-by-side tests between native Windows and WSL2 (Ubuntu), V4 Pro showed better trajectory quality, more stable tool usage, and better overall performance on Linux. But abandoning the Windows environment entirely was not an option — day-to-day files, the software ecosystem, and desktop apps (like the companion Electron client in this repo's workflow) all depend on the Windows side.

So we needed infrastructure where both environments stay online and you can switch at any moment:

Two DSH instances run independently, each with its own session history and working directory
One click to switch, without interrupting the other environment's work
This tool became this plugin, along with a complete from-scratch guide for

setting up the WSL2 + DSH dual environment (below)

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✨ Features

🖥️ Coexistence: Windows DSH (127.0.0.1:3080) and WSL DSH (127.0.0.1:3081) run at the same time
🔀 One-click switch: | Windows | WSL | selector in the web UI; the current tab navigates directly — no kills, no popup windows
📌 Two UI entries:

- 「环境」 tab above the conversation (always visible, unaffected by sidebar collapse) - Left-sidebar footer switcher (auto-hidden when the sidebar collapses)

⚙️ Fully configurable: ports, WSL distro, node path, log paths via cordis.patch.yml
🌏 Bilingual UI: follows the DSH language automatically (zh/en)
🧩 Self-contained: the host half ensures servers are running with plain Node — no external scripts

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🚀 From scratch: WSL2 + DSH dual-environment setup

0. Requirements

Item	Requirement
Windows	Windows 10 2004+ / Windows 11
Virtualization	Virtualization enabled in BIOS/UEFI (VT-x/AMD-V)
WSL2	"Virtual Machine Platform" feature enabled (`wsl --install` handles this)
Disk	≥ 10GB free space recommended for the WSL distro

1. Install WSL2 + Ubuntu

Run in an administrator PowerShell:

wsl --install -d Ubuntu-24.04

The first install requires a reboot
After reboot, follow the prompts to create a Linux username and password
Verify the installation:

wsl -l -v
#   NAME            STATE           VERSION
# * Ubuntu-24.04    Running         2        ← VERSION must be 2 (WSL2)

> If VERSION is 1, run wsl --set-version Ubuntu-24.04 2.

2. Install Node.js ≥ 22 inside WSL

DSH requires Node ≥ 22 (Node 20 crashes — missing createZstdDecompress, Promise.withResolvers and other APIs).

Option A: nvm (recommended, user-level install)

curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.3/install.sh | bash
export NVM_DIR="$HOME/.nvm" && . "$NVM_DIR/nvm.sh"
nvm install 24
nvm alias default 24

> If GitHub is unreachable, download the Node binary directly from npmmirror: > ``bash > curl -fsSL -o /tmp/node.tar.xz "https://registry.npmmirror.com/-/binary/node/latest-v24.x/node-v24.0.0-linux-x64.tar.xz" > mkdir -p ~/.node && tar -xJf /tmp/node.tar.xz -C ~/.node > echo 'export PATH="$HOME/.node/node-v24.0.0-linux-x64/bin:$PATH"' >> ~/.bashrc > ``

Install the build toolchain (DSH's node-pty dependency needs native compilation):

sudo apt-get update && sudo apt-get install -y build-essential
# or passwordless WSL root: wsl -d Ubuntu-24.04 -u root -- apt-get install -y build-essential

3. Install DSH inside WSL

npm install -g pnpm --registry=https://registry.npmmirror.com
npm install -g @deepseek-ai/dsh --registry=https://registry.npmmirror.com
dsh --version

First launch initializes the profile (installs the base bundles automatically):

setsid nohup dsh web --port 3081 >~/dsh-web.log 2>&1 < /dev/null &

> setsid keeps the server alive after the terminal session exits; > --port 3081 avoids colliding with the Windows side's 3080 — this is how the > two environments coexist.

4. Install DSH on Windows

npm install -g @deepseek-ai/dsh
dsh web          # default port 3080

> Alternatively, use the full @deepseek-ai/* set in C:\Users\<you>\node_modules as the global install (this machine uses that approach).

5. Install this plugin

# Option 1: install directly from GitHub (recommended; the repo is published)
dsh plugin --profile web add github:Oyama-Mahiro-F/dsh-env-switcher

# Option 2: npm install (once published to npm)
dsh plugin --profile web add dsh-env-switcher

# Option 3: local source install
dsh plugin --profile web add file:/path/to/dsh-env-switcher

Install it in BOTH environments (each profile):

# Windows PowerShell
dsh plugin --profile web add file:D:\path\to\dsh-env-switcher

# WSL
dsh plugin --profile web add file:/mnt/d/path/to/dsh-env-switcher

After installing, restart the DSH server and hard-refresh the browser (Ctrl+Shift+R).

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⚙️ Configuration

All fields are optional; the defaults fit a typical Windows + WSL2 machine:

# cordis.patch.yml
- insert:
    - id: dsh-env-switcher
      name: dsh-env-switcher
      config:
        winPort: 3080                         # Windows DSH port
        wslPort: 3081                         # WSL DSH port
        wslDistro: Ubuntu-24.04               # WSL distro name (see wsl -l -v)
        wslNodeBin: /home/fsc/.node/node-v24.0.0-linux-x64/bin   # WSL node bin dir
        wslLog: /home/fsc/dsh-web.log         # WSL server log path (inside WSL)
        winLog: D:\deepseek-harness\logs\dsh-web-win.log        # Windows server log path
        winWorkingDir: C:\Users\61468         # Windows npx launcher working dir

> ⚠️ Restart the DSH server after changing the configuration.

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🎯 Usage

Switch from the web UI

1. The 「环境」 tab appears in the tab bar above the conversation (alongside 「对话」/「轨迹」 etc.)

2. Open it to see the | Windows | WSL | selector and the current environment indicator

3. Click a target environment → the current tab navigates automatically (the target server is ensured to be running first)

There is also a mini 「运行环境」 switcher at the bottom of the left sidebar (hidden when the sidebar is collapsed).

Host API

| Endpoint | Description | |---|---| | GET /env/api/state | Returns { env, ownUrl, peerUrl } (current environment and both URLs) | | GET /env/api/switch?target=windows\|wsl | Ensures the target server is running (no kills, no browser popup); the client navigates itself |

Desktop shortcuts (optional)

A standalone shortcut script ships alongside the plugin (decoupled, in the scripts/ dir):

# Windows PowerShell
powershell -NoProfile -ExecutionPolicy Bypass -File .\scripts\switch-env.ps1 -Target wsl [-Visible] [-NoOpen]

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🏗️ Architecture

┌─────────────────────────────── Windows ───────────────────────────────┐
│  DSH (Windows)  ── 127.0.0.1:3080       browser ── localhost:3080     │
│      │ plugin host: /env/api/*                                       │
│      └── ensure the peer is up (powershell.exe / wsl.exe, start only) │
└───────────────────────────────────────────────────────────────────────┘
                 ▲ wsl.exe / bash (start/check)
┌─────────────────────────────── WSL2 ─────────────────────────────────┐
│  DSH (Linux)  ── 127.0.0.1:3081 (inside the VM) → reachable from     │
│                 Windows via localhost forwarding                      │
└───────────────────────────────────────────────────────────────────────┘

Port separation: Windows on 3080, WSL on 3081 (the VM has its own network stack — no conflict)
Coexistence: both instances run at once, each keeps its own session history
Switch = navigation: click target → ensure the server is up → the current tab navigates
No side effects: no kills, no VM restarts, no extra windows

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❓ FAQ

Q: The switch reports the target port unreachable? Check whether the target server is actually running: curl http://127.0.0.1:3081 (WSL side). If the WSL server is not up, inspect the log file configured by wslLog.

Q: Can the WSL environment access files on the Windows machine? Yes. Windows drives are mounted at /mnt/<letter> (e.g. D: → /mnt/d/), with permissions matching your Windows user.

Q: I run Clash or other proxy software and localhost forwarding is flaky? WSL2's localhost forwarding is occasionally disturbed by proxy software (the "localhost proxy detected" warning at startup). This plugin's dual-port coexistence model does not rely on a single forwarded port — even if forwarding misbehaves, Windows side 3080 and WSL side 3081 stay independent.

Q: Why can't the WSL instance bind 0.0.0.0 and be accessed by IP? DSH intentionally blocks --host 0.0.0.0 for security (it would expose remote code execution to the LAN); only 127.0.0.1 is allowed, so access must go through localhost forwarding.

Q: Where are the logs?

Windows server: the winLog path (default D:\deepseek-harness\logs\dsh-web-win.log)
WSL server: wslLog (default /home/fsc/dsh-web.log)
The plugin script itself: logs\switch-env.log (used by the standalone shortcut script)

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🛠️ Development

dsh-env-switcher/
├── package.json          # v1.1.0, publishable (npm publish)
├── cordis.patch.yml      # bundle declaration + defaults
├── README.md             # English docs
├── README.zh-CN.md       # Chinese docs
└── lib/
    ├── index.js          # host: /env/api/state + /env/api/switch + ensure
    └── client.js         # client: env tab + sidebar switcher (hand-written bundle, no build step)

Host: pure Node stdlib, zero third-party dependencies
Client: hand-written window.__ModuleLoader__ bundle; DSH's HMR watcher refreshes the revision automatically
After editing, sync to the profile's node_modules/dsh-env-switcher/ and restart DSH

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📄 License

[MIT](./LICENSE)