Paperclip MCP returns Session not found (-32600) on all tool calls mid-session
Diagnosis
The Streamable HTTP MCP session between Claude Code and paperclip-mcp container is lost — server-side session state in Redis expires or container restarts, invalidating the session ID held by the client. All subsequent tool calls to paperclip-mcp fail with code -32600 for the remainder of the conversation.
Fix
Use Paperclip REST API directly via godAgent_executeCommand (docker exec paperclip curl http://localhost:3100/api/…) as fallback. Sign in first: POST /api/auth/sign-in/email. Then use cookie for subsequent calls. Alternatively restart the conversation to establish a fresh MCP session.