Now let me show you something cool. HEARTBEAT.md is a checklist file that OpenClaw evaluates every 30 minutes. Each line is a condition the agent checks against its current state. If every condition passes, the agent writes HEARTBEAT_OK and moves on. If any condition fails, the agent triggers an alert.
You define what "healthy" means for your setup. A web developer might check that the dev server is running and tests pass. A DevOps engineer might verify that disk usage stays below 90% and no containers are in a crash loop. The heartbeat runs silently in the background until something breaks.