dsh-session-notification
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A notification plugin for the dsh web GUI. When a session finishes, hits an error, asks you a question, or needs your permission, you get a heads-up: a sound plays, and when you step away from the tab a system notification keeps you in the loop.
Screenshots
Install
# Install from npm (requires dsh >= 0.2.1-rc.2)
dsh plugin --profile web add @dingyi222666/dsh-session-notification
# Restart dsh web for it to take effect
dsh web
Everything lives in this plugin — no harness (host) changes:
- The settings section is registered through the client slot system (
settings.section), exactly like official sections.
- Preferences persist in the browser (localStorage) and sync across tabs; nothing requires a host settings namespace or any other host-package change. (dsh 0.1.7 derives plugin config forms from Loader entries, so the node half has no namespace to reserve and stays inert.)
- The settings shell maps only its own section ids to nav icons, so the Notifications nav row shows the shell's default gear.
The four notification kinds
| Kind | When it fires | Default sound |
|---|
| Session completed | A turn ends normally (turn/end completed) | chime |
| Session failed | A turn breaks with an error, or the host reports an agent error | fault |
| Question asked | The agent is waiting for your answer (question/requested) | pop |
| Permission requested | The agent requests an authorized operation (approval/requested) | alert |
Each kind can be enabled or disabled and reassigned to any of the four built-in sound effects (or muted). The four sounds are synthesized with Web Audio — no audio files are shipped — and the master volume is adjustable with the official-style slider (0–100%). A fixed loudness boost (~+6 dB) with a soft limiter on the playback chain makes every sound noticeably louder without distortion; custom audio feeds the same chain. The shared AudioContext is suspended as soon as playback is over and resumed by the next sound, so an idle notification never keeps the system audio stream (or a macOS sleep assertion) open.
Custom audio
Beyond the four built-in sounds, each kind accepts your own audio file (mp3/ogg/wav, up to 1 MB): pick Custom audio on a kind's row to upload one, and it replaces the built-in for that kind — with a Replace and remove affordance, plus the Custom audio in use tag. Custom files are stored browser-locally (they are device media, not shared preferences).
Browser notifications & the quiet default
Browser (system-level) notifications are off by default; turning the switch on asks for the browser's permission first (a user gesture). Once granted, a notification is shown when the event's session is not the one you are reading, or when the tab is in the background. Notifications carry the page's own icon (the favicon the harness serves). A completed session's notification carries its final reply text (the last assistant message). Clicking a notification focuses the page and opens that session (Web and desktop alike). The Test notification button in the section sends one immediately to verify the channel once permission is granted.
The session you are reading stays quiet by default — its own events don't interrupt you while you are actually watching it. The Current session alerts picker widens that:
| The session you are reading, while you are… | Hidden or minimized (default) | When switched away | Always |
|---|
| watching it with DSH focused | 🔕 Quiet | 🔕 Quiet | ✅ Alert |
| switched to another app, DSH still on screen | 🔕 Quiet | ✅ Alert | ✅ Alert |
| in another tab, or the window is minimized | ✅ Alert | ✅ Alert | ✅ Alert |
Notify for picks the scope (default Main, after subagents): All sessions alerts for every session including subagents; Main only alerts for the main session as soon as it goes idle; Main, after subagents holds that alert until every subagent the main session spawned has finished, so a run that only paused between subagent waves never interrupts you early (failures always alert immediately).
Desktop app
The plugin runs unchanged inside the dsh desktop application — the Electron shell loads the same Web client and plugin graph. Desktop notifications are native OS notifications: the shell grants notification permission by default, so turning Browser notifications on is enough and no permission prompt appears. A notification carries the application icon (the page favicon is used on Web; under dsh-app:// the page icon is skipped so the packaged app icon shows instead), is marked silent so the OS alert sound never doubles the plugin's own sound, and clicking one restores/focuses the window through the shell's app activation and opens that session's conversation — closing the window only hides it.
The desktop app owns $DSH_HOME/profiles/desktop and the CLI refuses to manage it, so install the plugin from the app's Plugins page (Settings → Plugins) instead of dsh plugin --profile desktop. Preferences are browser-local to that renderer, so they are separate from the Web profile's.
The Notifications settings section
The plugin registers a Notifications section in the settings panel (Settings ⚙ → Notifications):
- Browser notifications master switch (+ permission state and an enable button),
- Current session alerts picker (Hidden or minimized only / When switched away / Always),
- Notify for picker (All sessions / Main only / Main, after subagents),
- Sound master switch,
- Volume slider (0–100%),
- one row per notification kind: enable switch, custom-audio upload, sound picker (the official dropdown menu), and a Preview button,
- a Test notification button on the browser-notifications row (verifies the OS channel once permission is granted).
Preferences are stored browser-locally (localStorage) under the dsh-session-notification key — no host settings-namespace exposure required — so they persist across sessions and sync across tabs, and never depend on a harness change.
How it works
The browser half watches the sessions list snapshot and each session's conversation snapshot — no polling, no new wire channels:
- A session's
running edge true→false ends a run; the run is classified failed when a new turn-error node or a host agent-error appeared during it, otherwise completed (a failure that a retry recovered reads as completed).
- A completion raises nothing while the host still has work that will start another turn by itself (a queued follow-up, or a goal round the driver still owes): that idle edge is a pause, and the continuation's own end notifies. A completed or failed notice is titled by the run's latest user message, falling back to the session title.
- A pending-interaction edge (
question / approval) raises the question / permission kinds, with the question text or the tool name+reason in the notification body.
- Sessions already idle (or already pending) when the plugin loads raise nothing.
Development
yarn run build — builds the browser bundle (lib/client.js) and the Node half (lib/index.js).src/client/notification-service.ts — the engine (classification) and dispatcher (gating); src/client/settings-store.ts — the settings section bridge; src/client/NotificationsSection.tsx — the section UI; src/client/sounds.ts + src/client/custom-audio.ts — the built-in and custom sounds.yarn test — behavior tests; yarn run typecheck — type gate.- dsh 0.2.1-rc.2: the
@deepseek-ai/dsh-* types install from npm as devDependencies (^0.2.1-rc.2, with the now-stable @deepseek-ai/cordis ^4.0.5 and @deepseek-ai/schemastery ^3.18.5 matching the dsh peers); no checkout path mappings. The 0.2.1 line removed the runtime invariant-plugin mechanism (as of alpha.1), so the former ./invariant companion is gone.
- Node-half changes need a
dsh web restart; browser-bundle changes need a rebuild (yarn run build) — a --dev server hot-reloads them.
Known limitations
- Failure detection reads the conversation snapshot, which the client only maintains for sessions that have been opened; a session that runs without ever being opened notifies as completed even on failure.
- Browser notifications require permission, and sound playback requires the page to have user activation (the browser's autoplay policy) — both are normal for browser apps and resolve as soon as the user interacts with the GUI.
- Custom audio files live in the browser (localStorage), so they do not follow you across browsers or profiles.
- The browser half is event-driven from the sessions list; it does not observe the raw event stream, so a run that starts and finishes between two list snapshots could in principle be missed (the host sends a status flip per edge, so this does not happen in practice).
- Goal activation is process-local and never on the wire: a goal left
active but disarmed (for example after a restart) reads as a continuation, so its idle edge stays unannounced until the goal changes or is resumed.
- Background-job rosters are loaded only for the session you are viewing, so a job that finishes and wakes an idle session is invisible to the client at that idle edge; such a wake can still produce an early completion notice.
Model Experience
None. The plugin is a pure client-side observer over the already-logged session state; nothing here reaches a model request.
KV Cache effect
None; this package neither assembles nor sends provider requests.
