A killed nightly (pause/crash/reboot) left .nightly.lock.d behind — the
EXIT trap never fires on SIGKILL — and EVERY later run then skipped
silently (caught 2026-07-27: today's run exited in <1s). Lock now
records its PID and a run whose owner is gone takes it over.
Reconcile hit the 15-min tape-sync agent's single-writer lock and died;
now waits it out (20x30s).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
jaxperro