signoff

name	signoff
description	End-of-session — update memory, clean up, report

End-of-session wrap-up:

1. Update memory files in the project memory directory with any new state (decisions made, key discoveries, workflow changes)
2. Clean up stale local branches: git branch -vv | grep ': gone]' | awk '{print $1}' | xargs git branch -D
3. Report: what shipped, what's pending, what's next