1  schema migrations land before any code that depends on the new shape
2  contracts (events, APIs) land before consumers
3  generated/registry docs update with the change that introduced them
4  feature flags created before code paths that reference them
5  data backfills are independent stories with explicit verification
6  UI lands after the API/contract it depends on
7  irreversible steps come last per workstream so earlier stories can be reverted independently
