dsh-sim-restart
Simulated-restart testing for DeepSeek Harness (DSH) plugins. Without actually restarting the DSH process, it runs each plugin through the full restart path — process restart → module eval → plugin shape → apply start → smoke run → dispose cleanup → clean exit — in an isolated subprocess, and reports whether the plugin would crash or hang after a real restart.
A resident watcher auto-triggers these tests whenever any plugin is installed, modified, or removed, and pushes failure diagnostics into the agent's prompt until everything passes again.
Open-source release of dsh-lark-sim-restart (renamed; the plugin was never Lark-specific).
Features
| Feature | Description |
|---|---|
| Full plugin-type coverage | Dynamic plugins (source mode), filesystem plugins (plugins/), npm plugins (node_modules/, incl. @scope), and any directory with a package.json (module mode, auto-detected) |
| Engine auto-resolution | Entry resolved from package.json exports/main or common paths; dependencies laid out from the profile node_modules, the global root, the DSH install, and plugins/ |
| Real config passing | Auto-tests collect each plugin's config from the patch layer (bundle-internal + profile, !!js expressions evaluated host-side) |
| Agent feedback loop | Failures are injected as a systemPrompt section with exact diagnostics; the watcher re-tests after every fix until all pass |
| Bundled engine | The engine (lib/engine.mjs) ships inside the package — zero external deployment |
Tools
| Tool | Description |
|---|---|
simulate_plugin_restart |
Run one plugin through the simulated-restart pipeline (source or module mode), structured per-round/per-stage ✅/❌ diagnostics |
simulate_plugin_restart_auto |
Scan every enabled plugin and test them all in sequence; also used by the resident watcher |
sim_restart_auto_status |
Query watcher state: watch scope, last scan, pending queue, latest per-plugin results and failure diagnostics |
Install
Place the package under a DSH profile (plugins/ or node_modules/) and enable it in cordis.patch.yml:
- insert:
- id: sim-restart
name: dsh-sim-restartRequirements: Node.js ≥ 20, @deepseek-ai/dsh-tools peer, and js-yaml (dependency).
Configuration
| Key | Default | Description |
|---|---|---|
watchEnabled |
true |
Enable the resident auto-testing watcher |
pollMs |
2000 |
Watcher scan interval (ms) |
debounceMs |
2500 |
Debounce before testing after a change (ms) |
rounds |
2 |
Rounds per auto-tested plugin (1–4) |
smokeMs |
800 |
Smoke-run duration per round (ms) |
profileDir |
~/.dsh/profiles/web |
Target DSH profile root to watch and test |
stubsMap |
Lark defaults | Plugin-name → stub list for external connections (e.g. deepseek-harness-lark WebSocket) |
How it works
- The engine runs each round in a fresh temp directory (
mktemp -d), writingparams.jsonand executingnode engine.mjs params.json. - The engine deliberately does not call
process.exit(): a clean run exits naturally when all handles are released. A hung process (timed out by the caller) is the exact "would hang after restart" verdict. - The watcher computes directory signatures (
size + mtimeof every file), diffs them on each poll, debounces, then tests changed plugins through a serial queue. - Results persist to
~/.dsh/var/sim-restart/auto-status.json(configurable per deployment).
Development
node --check lib/index.js && node --check lib/engine.mjs
node test/self-test.mjsLicense
MIT