Domain Event

An immutable business fact emitted by a canonical mutation.

Reviewed: July 2026
Current state: Domain events are implemented; universal reconstruction from all events is not claimed.

Owning boundary: Applicable Kernel domain module
Not equivalent to: Audit Event · Provider Observation
Verified identifiers: eventId · eventType

A Domain Event records an immutable business fact produced by a canonical mutation. It is not a raw provider observation or a generic application log.

Related guidance

What is the difference between a Command and a Domain Event?

How does Kernel correct a mistake without rewriting history?

Command

Audit Event

Integration Event