Provenance & Admissibility¶
Provenance answers "how was this produced"; admissibility answers "is this
allowed to be reported". The evidence-audit engine is the fail-closed gate
that decides admissibility from the provenance graph rather than from a
confidence score.
Evidence-Audit Model¶
evidence-audit is the Tier 2b engine for fail-closed provenance validation. It
consumes an EvidenceBundle and validates that every claim is linked to
supporting, derived, processed, and checked evidence before the claim is
admissible downstream.
| Contract family | Purpose |
|---|---|
| Routing | Records the selected engine and handoff context |
| Provenance | Links claims to supporting, derived, processed, and checked evidence |
| Gate decisions | Carries pass, fail, block, and advisory status through runtime phases |
| Eval scorecards | Represents per-PR and nightly evaluation verdicts |
Admissibility Chain¶
Admissibility is deterministic and fail-closed. A claim is admissible only when
its EvidenceBundle passes provenance validation; a missing or incomplete
bundle blocks the claim rather than downgrading it to a low-confidence display.
Knowledge-graph queries run in direct mode and deliberately skip the post-dispatch evidence guardian, so graph-grounded answers must emit provenance inline rather than relying on post-dispatch enforcement.
Source Pointers¶
references/evidence-contracts.mddocs/adr/002-evidence-guardian-wiring.mdreferences/engine-catalog.md