# Artifact derivation lineage check

Build-time release reference. Runtime readiness, deployment, payment settlement and external indexing are not evaluated here. Prices are proposed; this file cannot authorize execution or payment.

Check a supplied artifact derivation graph for parent-digest and media-type agreement, missing or cyclic ancestry, and required/forbidden ancestor or depth constraints. Inspect only supplied manifests; no artifact bytes, derivations, identities or source authenticity are verified.

Release: 0.29.0. Built: 2026-10-06T15:38:00Z.

## Choose for
- Validate artifact parent digests and transformation media contracts
- Check required or forbidden source ancestry before accepting an agent artifact

## Outside this profile
- Live negotiation, message delivery, queue consumption, remote pagination, artifact fetching or migration execution
- Authentication, signed provenance, authorization, schema compatibility proofs, or exactly-once guarantees
- Inferring absent versions, server state, missing history, semantic equivalence, or market uniqueness

Proposed nominal USD 0.005 per successful call; payer fees excluded. No verified runtime availability.

- [Exact release contract](/reference/services/artifact-lineage-check.json)
- [Input schema](/reference/schemas/artifact-lineage-check.input.json)
- [Output schema](/reference/schemas/artifact-lineage-check.output.json)
- [Fixed example](/reference/examples/artifact-lineage-check.json)
- [Complete HTML reference](/discover/tools/artifact-lineage-check)