OpenHarness Find Plugin

A DeepSeek Harness plugin that discovers, installs, and upgrades plugins from the curated OpenHarness Plugins catalog.

The plugin contributes three surfaces:

• openharness_find_plugins, a read-only model tool for catalog search.
• Discover, a Web UI tab under Settings → Plugins with search, filters,

plugin details, confirmation, operation status, cancellation, and activation state.

• /openharness-find/v1, a same-origin Host API that owns Catalog validation,

installed-state detection, and profile mutations.

The browser submits only a plugin name, version, Catalog revision, and install/upgrade intent. The Host rereads the Catalog and derives either an exact npm version or a GitHub repository pinned to a 40-character commit. It never accepts a package spec, URL, command, profile, or working directory from the browser.

Profile mutations run through a Runtime Adapter. The default adapter reuses the active DSH entry with shell: false; OpenHarness can provide a managed adapter for its packaged runtime and Supervisor. Operations are asynchronous and use a single mutation lock, process-tree cancellation, a bounded timeout and output, profile metadata snapshots, post-install verification, and controlled rollback.

Installed and upgrade state requires an exact distribution package match, or a canonical name corroborated by the normalized repository. Conflicts and bare names remain conflict or unknown, and never enable installation. Semantic versions distinguish installed, upgrade available, and a newer local version.

The Client obtains environment capabilities, Catalog data, installed state, and operation state exclusively from the same-origin Host API. If that API is not available or returns an invalid response, the Client reports an error and does not call another Catalog or installation endpoint. Every profile mutation goes through the Host validation, locking, and rollback path.

The default DSH Runtime Adapter reports a successful client-only install as requiring a page reload. A plugin with Host components requires a Host restart; a managed OpenHarness adapter may perform activation or restart directly.

Install from a checkout

Build the package, then add it to the DSH Web profile:

pnpm install
pnpm build
dsh plugin --profile web add .

Catalog Git revisions include the built lib files and do not run lifecycle build scripts during installation. This keeps pnpm's build allowlist closed in the user's DSH profile. Release builds do not include source maps.

Alternatively, test without changing a profile:

dsh web --patch ./cordis.patch.yml

Development

pnpm install
pnpm typecheck
pnpm test
pnpm build

The default catalog endpoint is:

https://microspotlight.github.io/openharness-plugins/catalog/v1/catalog.json

The Host API exposes:

GET  /openharness-find/v1/environment
GET  /openharness-find/v1/catalog
GET  /openharness-find/v1/installed
POST /openharness-find/v1/operations
GET  /openharness-find/v1/operations/current
GET  /openharness-find/v1/operations/{id}
POST /openharness-find/v1/operations/{id}/cancel
POST /openharness-find/v1/restart

Mutation routes require a direct loopback connection and an Origin matching Host. Forwarded requests are rejected.

Supported Runtime

The initial release targets DeepSeek Harness 0.1.0-rc.6. DSH is in developer preview, so compatibility is intentionally pinned and tested rather than assumed across release candidates.

License

Apache License 2.0.