Artifact: Skimmable Design Note — Shipment-Delayed Notification Type
shipment_delayednotification-type proposal -- passes the thirty-second skim test -- exercises co-03.
Raw document text, as the author would ship it:
## Proposal: add a `shipment_delayed` notification type
**Decision: add a new notification type, `shipment_delayed`, sent once a shipment's ETA slips more
than 24 hours past its original estimate.**
### Why now
Customer support tickets tagged "where is my order" have grown 30% quarter over quarter, and manual
review shows the majority come from shipments with a stale ETA the customer had no visibility into.
### What changes
The Notification Worker gains one new event type and one new template; the Shipment API emits the
event when ETA recalculation detects a 24-hour-plus slip.
**Next action: Notification Worker owner (Priya) reviews the template copy by Friday.**Last updated July 15, 2026