# Notification digests

Digests coalesce matching events into scheduled summaries to reduce noise.

Digest lifecycle
- Rule action selects digest window (instant, 5m, 15m, 1h, 1d).
- Worker aggregates events per tenant and action.
- Window flush renders a digest template and emits a delivery.

Storage and audit
- Digest documents store window metadata and items.
- Delivery ledger links to digest ids for traceability.

Safety and determinism
- Idempotent digest delivery ids per window.
- Throttles and quiet hours are respected.
- Workers resume open windows after restart.

Related references
- docs/notifications/digests.md