spec-kitty

### Technical Specification: Real-time Chat Notifications for Acme CRM

**Overview:** Implement a WebSocket-based notification system for CRM users when new messages arrive in their inbox. The system will push real-time updates to the frontend without requiring page refreshes.

**Tech Stack:** Node.js (v20), Express.js, Socket.IO, PostgreSQL (v15), Redis (for pub/sub), React (frontend)

**API Endpoints:**
1. `POST /api/notifications/subscribe` - Subscribes a user to their notification channel
2. `GET /api/notifications` - Returns paginated list of unread notifications
3. `PUT /api/notifications/read` - Marks notifications as read

**Database Schema:**
```sql
CREATE TABLE notifications (
  id SERIAL PRIMARY KEY,
  user_id INTEGER REFERENCES users(id) ON DELETE CASCADE,
  message TEXT NOT NULL,
  is_read BOOLEAN DEFAULT FALSE,
  created_at TIMESTAMP DEFAULT NOW(),
  channel VARCHAR(50) NOT NULL
);
```

**Kanban Board (GitHub Projects):**
- Backend Setup (High Priority)
- WebSocket Integration (High Priority)
- Frontend Notification UI (Medium Priority)
- Database Migration Scripts (Low Priority)
- Error Handling & Retry Logic (Medium Priority)
- Load Testing (Low Priority)

**Git Worktree Setup:**
```bash
git worktree add -b feature/chat-notifications feature/chat-notifications
cd feature/chat-notifications
```

**First Commit Message:**
"feat: initial spec for real-time chat notifications

- Defines WebSocket architecture
- Specifies API contracts
- Includes error handling scenarios
- Links to Figma mockups for UI"

**Edge Cases to Handle:**
1. User disconnects mid-conversation (auto-reconnect with exponential backoff)
2. High volume of simultaneous notifications (rate limiting per user)
3. Database connection failures (queue notifications in Redis for later delivery)
4. Frontend offline scenarios (sync notifications when connection restored)

**Development Methodology:** Scrum with 2-week sprints, daily standups at 10 AM EST.