# Sprint 513 - Ops & Offline · 190.H) Provenance

Active items only. Completed/historic work now resides in docs/implplan/archived_sprints_tasks.md (updated 2025-11-08).

[Ops & Offline] 190.H) Provenance
Depends on: Sprint 100.A - Attestor, Sprint 110.A - AdvisoryAI, Sprint 120.A - AirGap, Sprint 130.A - Scanner, Sprint 140.A - Graph, Sprint 150.A - Orchestrator, Sprint 160.A - EvidenceLocker, Sprint 170.A - Notifier, Sprint 180.A - Cli
Summary: Ops & Offline focus on Provenance).
Task ID | State | Task description | Owners (Source)
--- | --- | --- | ---
PROV-OBS-53-001 | TODO | Implement DSSE/SLSA `BuildDefinition` + `BuildMetadata` models with canonical JSON serializer, Merkle digest helpers, and deterministic hashing tests. Publish sample statements for orchestrator/job/export subjects. | Provenance Guild (src/Provenance/StellaOps.Provenance.Attestation)
PROV-OBS-53-002 | TODO | Build signer abstraction (cosign/KMS/offline) with key rotation hooks, audit logging, and policy enforcement (required claims). Provide unit tests using fake signer + real cosign fixture. Dependencies: PROV-OBS-53-001. | Provenance Guild, Security Guild (src/Provenance/StellaOps.Provenance.Attestation)
PROV-OBS-54-001 | TODO | Deliver verification library that validates DSSE signatures, Merkle roots, and timeline chain-of-custody, exposing reusable CLI/service APIs. Include negative-case fixtures and offline timestamp verification. Dependencies: PROV-OBS-53-002. | Provenance Guild, Evidence Locker Guild (src/Provenance/StellaOps.Provenance.Attestation)
PROV-OBS-54-002 | TODO | Generate .NET global tool for local verification + embed command helpers for CLI `stella forensic verify`. Provide deterministic packaging and offline kit instructions. Dependencies: PROV-OBS-54-001. | Provenance Guild, DevEx/CLI Guild (src/Provenance/StellaOps.Provenance.Attestation)