git.stella-ops.org/docs/product-advisories/IMPLEMENTATION_STATUS.md

Implementation Status: Competitor Gap Closure

Date: 2025-12-23 Status: Phase 1 In Progress Sprint: SPRINT_3000_0100_0001 (Signed Delta-Verdicts)

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✅ Completed Artifacts

Documentation (100% Complete)

Document	Status	Location
Sprint Plans	✅ Complete (5 sprints)	docs/implplan/SPRINT_*.md
JSON Schemas	✅ Complete (2 schemas)	docs/schemas/
Verdict Attestations Guide	✅ Complete	docs/policy/verdict-attestations.md
Evidence Pack Schema Guide	✅ Complete	docs/evidence-locker/evidence-pack-schema.md
Implementation Summary	✅ Complete	docs/product-advisories/23-Dec-2026 - Implementation Summary - Competitor Gap Closure.md

Code Implementation (Phase 1: 40% Complete)

Policy Engine - Verdict Attestation (✅ 60% Complete)

Component	Status	File
VerdictPredicate Models	✅ Complete	src/Policy/StellaOps.Policy.Engine/Attestation/VerdictPredicate.cs
VerdictPredicateBuilder	✅ Complete	src/Policy/StellaOps.Policy.Engine/Attestation/VerdictPredicateBuilder.cs
IVerdictAttestationService	✅ Complete	src/Policy/StellaOps.Policy.Engine/Attestation/IVerdictAttestationService.cs
VerdictAttestationService	✅ Complete	src/Policy/StellaOps.Policy.Engine/Attestation/VerdictAttestationService.cs
HttpAttestorClient	✅ Complete	src/Policy/StellaOps.Policy.Engine/Attestation/HttpAttestorClient.cs
Integration with Policy Run	⏳ Pending	Policy execution workflow
DI Registration	⏳ Pending	DependencyInjection/
Unit Tests	⏳ Pending	__Tests/StellaOps.Policy.Engine.Tests/

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🚧 In Progress

SPRINT_3000_0100_0001: Signed Delta-Verdicts

Overall Progress: 40%

Task	Status	Owner	Notes
✅ Define verdict attestation predicate schema	Complete	Policy Guild	JSON schema validated
✅ Design Policy Engine → Attestor integration contract	Complete	Both guilds	HTTP API contract defined
⏳ Define storage schema for verdict attestations	In Progress	Evidence Locker	PostgreSQL schema needed
✅ Create JSON schema for verdict predicate	Complete	Policy Guild	stellaops-policy-verdict.v1.schema.json
✅ Implement VerdictAttestationRequest DTO	Complete	Policy Guild	Done in IVerdictAttestationService.cs
✅ Implement VerdictPredicateBuilder	Complete	Policy Guild	Done
⏳ Wire Policy Engine to emit attestation requests	Pending	Policy Guild	Post-evaluation hook needed
⏳ Implement verdict attestation handler in Attestor	Pending	Attestor Guild	Handler + DSSE signing
⏳ Implement Evidence Locker storage for verdicts	Pending	Evidence Locker Guild	PostgreSQL + object store
⏳ Create API endpoint GET /api/v1/verdicts/{verdictId}	Pending	Evidence Locker	Return DSSE envelope
⏳ Create API endpoint GET /api/v1/runs/{runId}/verdicts	Pending	Evidence Locker	List verdicts
⏳ Unit tests for predicate builder	Pending	Policy Guild	Schema validation, determinism
⏳ Integration test: Policy Run → Verdict Attestation	Pending	Policy Guild	End-to-end flow
⏳ CLI verification test	Pending	CLI Guild	stella verdict verify
⏳ Document verdict attestation schema	Complete	Policy Guild	docs/policy/verdict-attestations.md
⏳ Document API endpoints	Pending	Locker Guild	OpenAPI spec updates

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📦 Files Created (This Session)

Policy Engine Attestation Components

src/Policy/StellaOps.Policy.Engine/Attestation/
├── VerdictPredicate.cs                      # Core predicate models
├── VerdictPredicateBuilder.cs               # Builder service (trace → predicate)
├── IVerdictAttestationService.cs            # Service interface
├── VerdictAttestationService.cs             # Service implementation
└── HttpAttestorClient.cs                    # HTTP client for Attestor API

Documentation & Schemas

docs/
├── implplan/
│   ├── SPRINT_3000_0100_0001_signed_verdicts.md       # HIGH priority
│   ├── SPRINT_3000_0100_0002_evidence_packs.md        # HIGH priority
│   ├── SPRINT_4000_0100_0001_proof_panels.md          # MEDIUM priority
│   ├── SPRINT_4000_0100_0002_vuln_annotation.md       # MEDIUM priority
│   └── SPRINT_3000_0100_0003_base_image.md            # MEDIUM priority
├── schemas/
│   ├── stellaops-policy-verdict.v1.schema.json        # Verdict predicate schema
│   └── stellaops-evidence-pack.v1.schema.json         # Evidence pack schema
├── policy/
│   └── verdict-attestations.md                        # Comprehensive guide
├── evidence-locker/
│   └── evidence-pack-schema.md                        # Pack format guide
└── product-advisories/
    ├── 23-Dec-2026 - Implementation Summary - Competitor Gap Closure.md
    └── IMPLEMENTATION_STATUS.md (this file)

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⏳ Next Steps (Priority Order)

Immediate (This Week)

1. Create Evidence Locker Module Structure

   • Directory: src/EvidenceLocker/StellaOps.EvidenceLocker/
   • PostgreSQL migrations for verdict_attestations table
   • API endpoints: GET /api/v1/verdicts/{verdictId}, GET /api/v1/runs/{runId}/verdicts

2. Implement Attestor Handler

   • Directory: src/Attestor/
   • VerdictAttestationHandler.cs - Accept, validate, sign, store
   • DSSE envelope creation
   • Optional Rekor anchoring

3. Wire Policy Engine Integration

   • Modify src/Policy/StellaOps.Policy.Engine/ policy execution workflow
   • Call VerdictAttestationService.AttestVerdictAsync() after each finding evaluation
   • Feature flag: PolicyEngineOptions.VerdictAttestationsEnabled

4. Create Unit Tests

   • src/Policy/__Tests/StellaOps.Policy.Engine.Tests/Attestation/
   • Test VerdictPredicateBuilder.Build() with sample PolicyExplainTrace
   • Test JSON schema validation
   • Test determinism hash computation

Week 2

5. Integration Tests

   • End-to-end: Policy Run → Verdict Attestation → Storage → Retrieval
   • Test with Testcontainers (PostgreSQL)
   • Verify DSSE envelope structure

6. CLI Commands

   • src/Cli/StellaOps.Cli/Commands/
   • stella verdict get <verdictId>
   • stella verdict verify <verdict.json> --public-key <key>
   • stella verdict list --run <runId> --status blocked

7. Database Migration Scripts

   • PostgreSQL schema for verdict_attestations
   • Indexes on run_id, finding_id, tenant_id, evaluated_at

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🏗️ Module Structure (To Be Created)

Evidence Locker Module

src/EvidenceLocker/
├── StellaOps.EvidenceLocker/
│   ├── Storage/
│   │   ├── VerdictRepository.cs
│   │   └── IVerdictRepository.cs
│   ├── Api/
│   │   ├── VerdictEndpoints.cs
│   │   └── VerdictContracts.cs
│   ├── Migrations/
│   │   └── 001_CreateVerdictAttestations.sql
│   └── StellaOps.EvidenceLocker.csproj
├── __Tests/
│   └── StellaOps.EvidenceLocker.Tests/
│       ├── VerdictRepositoryTests.cs
│       └── VerdictEndpointsTests.cs
└── AGENTS.md

Attestor Module Enhancements

src/Attestor/
├── Handlers/
│   └── VerdictAttestationHandler.cs
├── DSSE/
│   └── DsseEnvelopeService.cs
└── Rekor/
    └── RekorClient.cs

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📊 Progress Metrics

Overall Implementation Progress

Sprint	Priority	Progress	Status
SPRINT_3000_0100_0001 - Signed Verdicts	HIGH	40%	🟡 In Progress
SPRINT_3000_0100_0002 - Evidence Packs	HIGH	0%	⚪ Not Started
SPRINT_4000_0100_0001 - Proof Panels UI	MEDIUM	0%	⚪ Not Started
SPRINT_4000_0100_0002 - Vuln Annotation UI	MEDIUM	0%	⚪ Not Started
SPRINT_3000_0100_0003 - Base Image Detection	MEDIUM	0%	⚪ Not Started

Code Completion by Module

Module	Files Created	Files Pending	Completion %
Policy.Engine (Attestation)	5/8	3	62%
Attestor (Handler)	0/3	3	0%
Evidence Locker	0/5	5	0%
CLI (Verdict Commands)	0/4	4	0%
Tests	0/6	6	0%

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🎯 Success Criteria (SPRINT_3000_0100_0001)

Must Have (MVP)

• Every policy run produces signed verdict attestations
• Verdicts stored in Evidence Locker with DSSE envelopes
• API endpoints return verdict attestations with valid signatures
• CLI can verify verdict signatures offline
• Integration test: full flow from policy run → signed verdict → retrieval → verification

Should Have

• Rekor anchoring integration (optional)
• Batch verdict signing optimization
• Comprehensive error handling and retry logic
• Metrics and observability

Nice to Have

• Verdict attestation caching
• Webhook notifications on verdict creation
• Verdict comparison/diff tooling

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🔧 Technical Debt & Known Gaps

Current Limitations

1. Evidence Locker Module Missing

   • Need to scaffold entire module structure
   • PostgreSQL schema not yet defined
   • API endpoints not implemented

2. Attestor Handler Not Implemented

   • DSSE signing logic needed
   • Rekor integration pending
   • Validation logic incomplete

3. Policy Engine Integration Incomplete

   • Policy execution workflow not modified to call attestation service
   • Feature flags not wired
   • DI registration incomplete

4. No Tests Yet

   • Unit tests for VerdictPredicateBuilder needed
   • Integration tests for end-to-end flow needed
   • Schema validation tests needed

Required Dependencies

1. DSSE Library - For envelope creation and signing
2. Rekor Client - For transparency log anchoring
3. PostgreSQL - For verdict storage
4. HTTP Client - Already using HttpClient for Attestor communication

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📈 Velocity Estimate

Based on current sprint scope:

Week	Focus	Deliverables
Week 1	Backend Core	Evidence Locker, Attestor Handler, Integration
Week 2	CLI & Tests	CLI commands, unit tests, integration tests
Week 3	Polish & Docs	Error handling, observability, documentation updates
Week 4	SPRINT_3000_0100_0002	Evidence Pack assembly (next sprint)

Estimated Completion for SPRINT_3000_0100_0001: End of Week 3

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📝 Notes

• All C# code follows .NET 10 conventions with latest C# preview features
• Determinism is enforced via canonical JSON serialization and sorted collections
• Offline-first design: no hard-coded external dependencies
• Air-gap support: signatures verifiable without network
• Feature-flagged: VerdictAttestationsEnabled defaults to false for safety

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🔗 References

• Gap Analysis: docs/product-advisories/23-Dec-2026 - Competitor Scanner UI Breakdown.md
• Implementation Plan: docs/product-advisories/23-Dec-2026 - Implementation Summary - Competitor Gap Closure.md
• Sprint Details: docs/implplan/SPRINT_3000_0100_0001_signed_verdicts.md
• Schema: docs/schemas/stellaops-policy-verdict.v1.schema.json
• API Docs: docs/policy/verdict-attestations.md