dsh-hot-plugin-host

Runtime plugin loading for DeepSeek Harness Web — no restarts.

The DSH loader tree is composed at boot, so adding a static client plugin (a UI panel, a widget, a dashboard) normally requires restarting dsh web. This plugin fixes that: it watches a hot directory and installs/updates client plugin bundles at runtime on every open page.

write a bundle → ~/.dsh/hot-plugins/<id>/client.js
      ↓ (host polls every 1.5s)
/ hot-plugins/list + SSE events + bundle serving
      ↓ (browser half)
fetch → __ModuleLoader__.load → loader.create (full cordis fiber lifecycle)
      ↓
the plugin goes live on every open page — no restart, no refresh

Updates work the same way (overwrite the file → invalidate + live refresh). Delete the directory → the plugin disappears on next page load.

Install

# from this repo
mkdir -p ~/.dsh/profiles/web/node_modules
ln -s "$PWD" ~/.dsh/profiles/web/node_modules/dsh-hot-plugin-host
# add "dsh-hot-plugin-host" to dsh.profile.bundles in
# ~/.dsh/profiles/web/package.json

Then restart dsh web once (the host itself is a boot plugin). From then on, every future plugin ships through the hot dir with zero restarts.

npm: dsh-hot-plugin-host (once published)

Usage

Drop a bundle into the hot directory:

mkdir -p ~/.dsh/hot-plugins/my-widget
cp examples/demo-widget/client.js ~/.dsh/hot-plugins/my-widget/
# within ~1.5s it is live on every open page

A hot bundle is the same __ModuleLoader__.load format as a boot bundle:

window.__ModuleLoader__.load({
  id: "my-widget",                       // must equal the directory name
  factory: (require) => {
    // require() only modules in the client table: react, react/jsx-runtime,
    // @deepseek-ai/dsh-client-runtime/client, ...
    const inject = ["sessions", "slots", "locale"];
    function apply(ctx) { /* full plugin powers: ctx.slots.register(...) */ }
    exports.apply = apply;
    exports.inject = inject;
    return module.exports;
  }
});

• id: [A-Za-z0-9@._-], single path segment, no /
• routes: GET /hot-plugins/list, GET /hot-plugins/events (SSE), GET /hot-plugins/<id>/client.js
• hot dir: DSH_HOT_PLUGINS env override, default ~/.dsh/hot-plugins (auto-created)

Examples

Example	Description
packages/dsh-client-ui-subagent-dashboard	Subagent dashboard in the right column: live status, expandable details, background jobs, one-click open of the child session transcript. Ships as its own npm package; also works as a hot bundle.
examples/demo-widget	Minimal self-contained hot bundle: a live status chip.

Security

The hot directory is a trust boundary, equivalent to the boot bundles list (a hot plugin gets full client-side service access). Local development machines only — never point it at untrusted content.

How it works

• Host half (lib/index.js): registers /hot-plugins routes on ctx.webServer (list / SSE / bundle), polls the hot dir (mtime+size → rev), broadcasts change events.
• Browser half (lib/client.js): injects loader; reconciles on connect (list), subscribes to SSE, fetches changed bundles, executes them via the standard module loader, then mounts them with loader.create — the exact mechanism the official dsh-cordis-client-runner uses for dynamic packages, giving hot plugins the full fiber lifecycle (activation gating, effect cleanup, status projection).

Related

• dsh-market — the community plugin market UI inside DSH (browse/search/one-click install)
• awesome-dsh-plugin — the curated registry this project is listed in

MIT