generated from coulomb/repo-seed
Dependency-free leaf rail: ProvenanceEnvelope + SpanProvenanceDelta + effective() (page envelope ⊕ span delta; zero-cost inheritance when uniform). Liveness/ Staleness/OverlayState enums. 6 tests green. (blueprint §7.3, §11) Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>