Cron Mastery Rule #1: Heartbeats drift. Cron is precise. This skill provides the definitive guide for managing time in OpenClaw 2026.2.15+. It solves the "I missed my reminder" problem by enforcing a strict separation between casual checks (heartbeat) and hard schedules (cron). The Core Principle | System | Behavior | Best For | Risk | | :--- | :--- | :--- | :--- | | Heartbeat | "I'll check in when I can" (e.g., every 30-60m) | Email checks, casual news summaries, low-priority polling. | Drift: A "remind me in 10m" task will fail if the heartbeat is 30m. | | Cron | "I will run at exactly X ti…