- Agent B's 64-test commonTest contract suite (PR #17) + Agent A's 34 driver tests = 98 green
- Frozen: core public API, SQLite schema, reconciliation contract, collector seam, E2EE seam
- Schema fix (compound PK) caught by B's 'events scoped to device' test — exactly the value of consumer-written contracts
- Agent B's contract suite proves the API against what it says, not what its author meant
- LumenStoreContract abstract kit: every future driver passes the same suite