Prompt

Build real-time communication architecture.

<use_cases>
{chat/collaboration/gaming/IoT/etc}
</use_cases>

<scale_requirements>
- Concurrent users: {number}
- Message volume: {per second}
- Latency needs: {milliseconds}
</scale_requirements>

<client_platforms>
{web/mobile/desktop platforms}
</client_platforms>

Design real-time architecture:
1. Protocol selection (WebSocket/SSE/etc)
2. Message broker design
3. Presence management
4. State synchronization
5. Offline support
6. Scaling strategy

Handle connection management and failover.