- Decouple WebSocket connection from session lifecycle: workflows continue running after disconnect
- Message buffering with ring buffer (max 1000) for chat history replay on reconnect
- Session garbage collection: 24-hour TTL for terminal sessions via background asyncio task
- Multi-tab support: last tab wins, old WebSocket closed on new connection for same session
- Cancel now sends explicit WebSocket message instead of relying on disconnect detection
- Replace hardcoded API keys and BASE_URL with ${API_KEY}/${BASE_URL} placeholders in yaml configs
Using atexit to clean up temporary zip files is unreliable because
atexit handlers only run when the process exits, not after each
download. This means temp files accumulate on disk, one per download,
until the server restarts.
Replace with Starlette's BackgroundTask which runs cleanup after
the response is fully sent, ensuring temp files are deleted promptly.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
