Exit codes

Code	Meaning	Typical commands
0	Success	Most commands
2	Await timeout (park — not a crash)	await-review, plan await
3	No active server for this repository	Agent cmds needing lockfile
4	Resource not found (comment/plan id)	reply, resolve, …
5	Usage / invalid arguments	Any

Await timeout policy

Exit 2 means the wait budget elapsed (default 570s). Agents should:

1. Treat it as disposition=park
2. End the turn (async resume later)
3. Re-await only if the human asked to keep waiting — never silent-loop

Shell example

diffing await-review
case $? in
  0) echo "review received" ;;
  2) echo "park — human not done" ;;
  3) echo "start diffing first" ;;
  *) echo "error $?" ;;
esac