# Policy Studio Copilot Attestation

## Module
Attestor

## Status
VERIFIED

## Description
Policy draft attestation types for AI-generated lattice rules with test case generation and signed snapshots.

## Implementation Details
- **AI Policy Draft Statement**: `src/Attestor/__Libraries/StellaOps.Attestor.ProofChain/Statements/AI/AIPolicyDraftStatement.cs` -- in-toto statement wrapping an AI-generated policy draft.
- **AI Policy Rule Draft**: `Predicates/AI/AIPolicyRuleDraft.cs` -- individual AI-generated policy rule with condition, action, and severity.
- **Policy Rule Type**: `Predicates/AI/PolicyRuleType.cs` -- enum of rule types (Gate, Advisory, Informational).
- **Policy Rule Test Case**: `Predicates/AI/PolicyRuleTestCase.cs` -- auto-generated test case for validating the drafted policy rule.
- **Policy Validation Result**: `Predicates/AI/PolicyValidationResult.cs` -- result of validating the drafted policy against test cases.
- **AI Authority Classifier**: `Predicates/AI/AIAuthorityClassifier.cs` (with `.PolicyDraft`, `.PolicyDraftScore`) -- classifies AI-generated policy drafts by authority level (Suggestion, EvidenceBacked, AuthorityThreshold).
- **AI Model Identifier**: `Predicates/AI/AIModelIdentifier.cs` -- identifies the AI model that generated the policy draft (provider, model, version, weights digest).
- **AI Decoding Parameters**: `Predicates/AI/AIDecodingParameters.cs` -- captures model parameters (temperature, top-p, max tokens) for reproducibility.
- **DSSE Signing**: `Signing/ProofChainSigner.cs` -- signs policy draft attestations for immutability.
- **Tests**: `__Tests/StellaOps.Attestor.ProofChain.Tests/AIPolicyDraftTests.cs`

## E2E Test Plan
- [ ] Create an `AIPolicyDraftStatement` with multiple `AIPolicyRuleDraft` entries and verify the statement structure
- [ ] Generate `PolicyRuleTestCase` entries for a drafted rule and verify they cover positive and negative scenarios
- [ ] Validate the drafted policy via `PolicyValidationResult` and verify it passes all generated test cases
- [ ] Classify the policy draft via `AIAuthorityClassifier.PolicyDraft` and verify the authority level based on evidence quality
- [ ] Verify `AIModelIdentifier` captures the model that generated the draft (e.g., provider="anthropic", model="claude-opus-4-6")
- [ ] Verify `AIDecodingParameters` captures reproducibility parameters (temperature, seed)
- [ ] Sign the policy draft statement via `ProofChainSigner` and verify the DSSE envelope is valid
- [ ] Create policy drafts of different `PolicyRuleType` (Gate, Advisory, Informational) and verify type-specific behavior

## Verification

| Check | Result |
|-------|--------|
| Tier 0 - Source Verification | PASS |
| Tier 1 - Build + Code Review | PASS |
| Tier 2 - Behavioral Verification | PASS |
| Verified Date | 2026-02-13 |
| Run ID | run-001 |