DeepSeek Harness GUI

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Native macOS desktop client for DeepSeek Harness
Double-click the icon and start using DSH — zero dependencies, no bundled browser.

Features

• ⚡ Zero dependencies — pure Swift over the system WebKit engine; built with only Xcode Command Line Tools. No Node, no Electron, no Chromium (~180 KB binary).
• 🔍 Automatic server discovery — settings.json → port 3080 → lsof scan of running dsh processes, each verified against the window.__DSH_BOOT__ fingerprint.
• 🚀 Self-start when needed — spawns dsh web --port N (N = 0 lets the OS pick a port) and reads the real URL from the readiness line dsh web: http://127.0.0.1:<port>.
• 🧹 Honest lifecycle — on quit it terminates only the server it started itself (SIGTERM → SIGKILL, by process group); a server that was already running is left untouched.
• 🐋 Official branding — the app icon is DeepSeek Harness's own whale, rendered from the shipped favicon.
• ⚙️ Headless config — settings.json controls port/url, working directory (cwd), dsh path and window size.
• 🔁 Resilient — 30 s startup timeout, up to 2 automatic reconnects, error page with retry, full log at ~/Library/Logs/dsh-gui.log.

Quick start

Requirements: macOS 14+, Xcode Command Line Tools (xcode-select --install), and dsh on PATH (or set dshPath).

git clone https://github.com/chentao326/dsh-gui.git
cd dsh-gui
bash build.sh          # builds and installs DSH.app to ~/Desktop

Or copy the prebuilt bundle from build/DSH.app into /Applications.

Run the test suite:

bash build.sh --test   # unit + spawner integration tests

Menu shortcuts: Cmd+R reload · Cmd+Shift+O open in browser · Cmd+Q quit.

Compared with other desktop shells

In one sentence: the Electron shells ship a Chromium to distribute installers; this project ships a few hundred kilobytes of auditable Swift for people who prefer to build from source.

Configuration

Optional ~/Library/Application Support/DSH GUI/settings.json:

{
  "port": 8080,
  "url": "http://127.0.0.1:8080",
  "cwd": "/path/to/project",
  "dshPath": "/path/to/dsh",
  "windowWidth": 1280,
  "windowHeight": 800
}

Logs

~/Library/Logs/dsh-gui.log — startup, connection and termination events plus the dsh child process output.

FAQ

The app says it cannot find dsh. Install it first: npm install -g @deepseek-ai/dsh, or point dshPath at your checkout's lib/bin.js.

Port 3080 is taken by something else. The app probes 3080 first; if the occupant is not DSH it spawns with --port 0 and discovers the OS-assigned port from stdout. No manual action needed.

My server was already running; will the app kill it on quit? No. Only a server the app spawned itself is terminated. An external server keeps running (the log records connected to … with no termination entry).

Can it run on Intel Macs? The shipped binary is arm64; cross-compile with swiftc -target x86_64-apple-macos13.0 (SDK supported).

Documents

• Design spec: docs/superpowers/specs/2025-08-14-dsh-gui-design.md
• Implementation plan: docs/superpowers/plans/2025-08-14-dsh-gui.md

License & discoverability

MIT © chentao326.

Following the official DeepSeek Harness README: add the dsh-plugin topic to your plugin repository for discoverability — this repository is tagged accordingly.