--- title: Heartbeat: a non-zero exit code now counts as a failed run description: Our docs said a non-zero exit code counts as a failed run, but reporting one (for example /p//137) did not fire the default "Run Failed" rule. That was… canonical: https://watchfor.io/changelog/2026-09-03-heartbeat-exit-codes --- [All updates](/changelog/page/5#2026-09-03-heartbeat-exit-codes) 🐛 Fixed Sep 3, 2026 · v 6.4.3 # Heartbeat: a non-zero exit code now counts as a failed run Our docs said a non-zero exit code counts as a failed run, but reporting one (for example /p//137) did not fire the default "Run Failed" rule. That was our bug, and it is fixed: a non-zero exit code now marks the run as failed, and /fail behaves as before. The ping URL also works the moment a monitor is created. Share this update --- Canonical page: https://watchfor.io/changelog/2026-09-03-heartbeat-exit-codes · Site guide: https://watchfor.io/llms.txt