ShawnPana c8242e7edd fix(cli): prevent orphaned server processes with flock-based locking ...

The session server had a race condition where concurrent CLI calls could
spawn multiple server processes. The old server would be orphaned when
the new one overwrote the PID file and deleted its socket.

Changes:
- Add flock-based locking using portalocker (already a dependency)
- Server acquires exclusive lock before writing PID file
- CLI checks both is_server_running() AND is_session_locked()
- Add kill_orphaned_server() to clean up servers with PID but no lock
- Increase socket timeout from 0.1s to 0.5s for reliability
- cleanup_session_files() now removes .lock and .meta files

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2026-02-12 10:10:05 -08:00

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