Closed Lid, Missed Night — a Catch-Up Runner That Fills Every Gap Exactly Once

Have you ever opened your laptop after a trip and realized the nightly job you trusted had not run once the whole time — and that nothing anywhere told you?

Every scheduler on every operating system has the same blind spot — it fires at a moment, and if the machine is asleep at that moment, the work is not late, it is simply gone. Worse, the usual fix makes it dangerous, because "run it when I wake up" turns nine missed mornings into nine duplicate emails or one silently overwritten ledger. This project has Claude Code build you a supervisor that indexes work by the period it belongs to instead of the instant it started, so every missed night gets done exactly once, in the right order, inside a cap you set — and the ones that are unsafe to backfill wait for you.