Two copies on one folder each keep their own idea of the chats and overwrite each other's saves,
and a second copy starting up would take the first one's open turns in the work log for a crash
and close them. The window, `--serve` and `--ask` now hold an OS file lock on anybot.lock in the
data folder (flock; LockFileEx on Windows), and `anybot setup` holds it while it writes the
settings, after stopping the service and before starting it again.
The lock goes with the process however it ends, so a copy that crashed or was killed never blocks
the next one. A new copy waits up to 5 s for one that is closing (a relaunch, a service restart).
Past that, a second window shows a small notice naming the holder's process and the folder, and
`--serve` / `--ask` say it on stderr and exit 1 (launchd's and systemd's restart then retry). Each
ANYBOT_DATA_DIR has its own lock; a screenshot run doesn't take it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Uirha5F5gJt93t3yEx3XcS
王性驊