monolith-websocket-pubsub

# Monolith WebSocket Pub/Sub ## Use this skill when - Building chat/live updates. - Debugging channel subscriptions or message broadcast behavior. ## Entry points - Route: `GET /ws` in `app/routes/routes.go` - Implementation: `ws/ws.go` - Persistent message model: `app/models/ws.go` ## Client protocol Send JSON commands: - Subscribe: `{"command":"subscribe","identifier":"ChatChannel"}` - Publish: `{"command":"message","identifier":"ChatChannel","data":"Hello"}` ## Server behavior - Hub tracks channel subscriptions. - `message` commands are persisted then broadcast to subscribed clients. - Client loop handles register/unregister and ping/pong lifecycle. ## Extension workflow 1. Pick channel naming strategy (room, user, domain event). 2. Add frontend websocket client logic in `static/js/application.js` or app-specific JS. 3. Optionally enforce auth checks before allowing subscribe/publish. 4. Add tests in `ws/ws_test.go` style for command handling.