Cron.

A time-based job scheduler. It's the timer behind anything that runs on its own clock: every hour, every morning at 7, the first of the month. You set the time, and cron fires the job without you touching it.

That's the whole idea. As Remy says, "cron is just a time-based job scheduler." It's the quiet piece underneath always-on tools that makes them actually fire on schedule.

Where it matters: any recurring agent run leans on a cron underneath. A morning briefing, a daily report, a cleanup that runs overnight. It pairs with a Trigger (cron is the time-based kind) and with a Heartbeat, where an agent wakes itself on an interval to check its work and then goes back to sleep.