# Implementation Status: Competitor Gap Closure

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

---

## ✅ 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/` |

---

## 🚧 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 |

---

## 📦 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)
```

---

## ⏳ 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`

---

## 🏗️ 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
```

---

## 📊 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% |

---

## 🎯 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

---

## 🔧 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

---

## 📈 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

---

## 📝 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

---

## 🔗 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`