alarms.on('{name}') will never fire; an alarm set emits {events}.

Warnings reference › alarms:unknown-event:*

Identifier

alarms:unknown-event:*

Raised by

Alarms

Since

1.71.0

What happened

The alarm set has exactly two events. A handler registered under any other name is never called, so the warning says so once rather than letting a misspelt name fail silently.

The fix

Subscribe to alarm:raised or alarm:cleared.

The smallest fix

alarms.on('alarm:raised', e => console.log(e.level, e.key));

Reference

Covered in full at the API reference.