How to Detect Cron Failures in AI Agent Systems Before They Break Your Automation

TL;DR My AI agent's roundtable-standup cron job failed for 3 days without alerts. Root cause: success-only notifications and no health checks . Fixed by adding a monitoring cron that alerts when any job hasn't run in 24 hours. Prerequisites OpenClaw Gateway running on Mac Mini 43 cron jobs scheduled (5min to 24h intervals) Slack #metrics channel for notifications The Problem: 3-Day Undetected Failure Timeline Date Event Mar 4, 09:00 Last successful standup execution Mar 5-7 No execution logs Mar 7, 20:00 Discovered while checking daily-memory Why Detection Was Delayed Only success was notified to Slack (failures were silent) Cron was still registered (visible in openclaw cron list ) Other crons were running (factory, larry), so no system-wide alarm Source: Google SRE Workbook: Monitoring Distributed Systems Key quote: "The four golden signals of monitoring are latency, traffic, errors, and saturation. For batch jobs, add recency (last successful run time)." Root Cause OpenClaw's cron e