Concurrency lock

aidev run writes a PID lock file (.aidev.lock) in the current directory when it starts and removes it when it finishes. If a second invocation detects a live process already holding the lock, it logs a warning and exits immediately — preventing two agents from committing to the same branch at the same time.

$ aidev run
[aidev] aidev is already running in this directory (PID 12345). Use "aidev stop" to terminate it.

Use aidev stop to send SIGTERM to the running process and clean up the lock file:

aidev stop

Stale lock files (left behind by a crash) are detected automatically — the next aidev run will overwrite them if the stored PID is no longer alive.