- Record
UD-S3- Status
- in force
- Built
- designed, not built
- Decided
- 2026-10-01 by the user
Logs are never lost: segment and archive, never delete
Retention means archive, never deletion: the ledger is segmented and its sealed segments are archived; nothing recorded is dropped to save space. The storage tiers are UD-S5b. Refines UR-08: what is logged stays retrievable.