dsh-harness-updater

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Agent harness updates for DeepSeek Harness. Detects the locally installed Claude Code and Codex CLI, compares them against the latest published versions, prompts in the DSH web UI, and — on your explicit click — runs the correct channel-specific upgrade command.

Inspired by the provider maintenance model of T3 Code.

What it does

1. Detects each harness on PATH (Windows .cmd/.ps1 shim aware) and probes <harness> --version with a bounded timeout.
2. Classifies the install channel from the resolved binary path: native installer, npm / pnpm / bun global, Homebrew, or manual-only.
3. Checks npm (registry.npmjs.org/<pkg>/latest) for the latest version with a 4 s timeout and a 1 h cache. Fully disabled via settings when offline.
4. Prompts: a persistent Updates card in DSH Settings → Plugins lists each harness with current → latest and an in-place Update button. Under DSH Native it also shows the native app's own self-update status.
5. Updates on click only — never silently. The runner serializes per channel lock, enforces a hard timeout with process-tree termination, caps captured output, then re-probes to verify and reports succeeded, unchanged, or failed.

Detected channel	Update command
Claude native (~/.local/bin/claude*)	claude update
npm global	npm install -g <pkg>@latest
pnpm global	pnpm add -g <pkg>@latest
bun global	bun install -g <pkg>@latest
Homebrew	brew upgrade claude-code / brew upgrade --cask codex
anything else (WinGet, standalone installers)	manual: copyable hint, no one-click

The updater invokes npm with explicit arguments and lets npm run the package lifecycle required to install the CLI.

Safety model

• Every route is loopback + same-origin gated; updates are POST-only mutations.
• One update per harness at a time; updates sharing a package manager queue behind a shared lock instead of racing.
• DISABLE_UPDATES=1 in the Harness environment blocks all automatic paths.
• Child processes are killed as a tree on timeout (Unix signals / taskkill /t /f).
• Updates are never started without a user click; nothing runs on a timer.

Install (local development)

Reference the plugin from your DSH profile:

// ~/.dsh/profiles/web/package.json
"dependencies": { "dsh-harness-updater": "link:C:/path/to/dsh-harness-updater" }

Add the bundled patch entry (the repo's cordis.patch.yml inserts it), run pnpm install in the profile, then restart DSH Web (host half).

Development

pnpm install
pnpm check        # typecheck + build + test

Configuration

All fields are editable in DSH Settings → Plugins → Harness updater (restart applies):

Field	Default	Meaning
enableUpdateChecks	true	Query npm for latest versions
statusRefreshIntervalMs	900000	Background status poll interval (min 60000)
hoverRefreshMinAgeMs	30000	Min age before a forced refresh is allowed (min 5000)
probeTimeoutMs	5000	Timeout for each --version probe (min 1000)
latestTimeoutMs	4000	Timeout for each registry lookup (min 1000)
latestVersionTtlMs	3600000	Registry result cache lifetime (min 30000)
updateTimeoutMs	300000	Hard timeout for an update command (min 30000)
claudeCommand / codexCommand / npmCommand	claude/codex/npm	Executables to use

License

MIT