Developer preview. Not production-ready, not audited, not for sensitive code. Read the limits

Record: BL-U3
Status: in force
Built: designed, not built
Decided: 2026-10-01 by the user

The lab app is re-baselined onto testing once, after its stage is sealed

After the fifty-stream stage is sealed (BL-U4), the lab’s app is re-baselined onto the current testing ONCE, with real three-way merges and its generated files rebuilt by harness sync (UR-02); the package split is done in the same window.