- scripts/loop-guard.sh — atomic claim with 30-min staleness overtake,
appends NDJSON event to .loop-logs/<lang>.ndjson. Exit 0 = go ahead,
exit 1 = another run is live, skip.
- scripts/loop-release.sh — clear lock, log release with exit status.
Intended for 7 per-language /schedule routines firing every 15 minutes.
Lock detects overlap so tight cadences are safe; stale lock (>30 min)
overtaken automatically if an agent dies mid-run.
