# Acceptance

## Implementation Result

Implemented stage three of Executor Structured Output V2:

- Verifier prompt now validates claim derivability rather than scanning final natural-language output.
- Verifier output supports `claim_checks`.
- `ChatService` derives compatibility `facts_checked` from `claim_checks`.
- `ChatService` persists both `claim_checks` and `facts_checked`.
- Effective verdict guardrails prevent Gatekeeper failures and malformed structured output from remaining `PASS`.
- Verifier logging summarizes `claim_checks`.

## Static Verification

- Reviewed `git diff --stat` and changed files are scoped to stage three implementation, tests, OpenSpec/devflow, and the issue handoff document.
- `cmd /c openspec validate executor-verifier-claim-checks` passed.
- After OpenSpec archive, `cmd /c openspec validate --specs` passed.

## Script Verification

Passed:

```powershell
mvn "-Dtest=ExecutorGatekeeperServiceTest,VerifierInputHookTest,ChatServiceSequentialAgentTest" test
```

Coverage:

- Verifier payload and Gatekeeper hook behavior.
- Gatekeeper schema/invocation validation.
- `claim_checks` parsing and persistence.
- `claim_checks` to `facts_checked` compatibility mapping.
- all claim verification mapping classes.
- Gatekeeper failure downgrade from model `PASS`.
- malformed Executor output downgrade from model `PASS`.

The targeted Maven test command was re-run after OpenSpec archive and passed.

## Browser / Manual Verification

Not run. This stage changes backend prompt, parser, audit, and tests only.

## OpenSpec Archive Status

Archived:

```text
openspec/changes/archive/2026-07-07-executor-verifier-claim-checks
```

Archive follow-up: the generated canonical `chat-verifier-agent` spec was reviewed and amended to preserve pre-existing verifier input and Gatekeeper schema scenarios while adding the new claim-check scenarios.

## Remaining Risks

- Composer is not implemented in this stage; final PASS rendering still uses the temporary V2 renderer until stage four.
- Full eval fixture expansion is deferred to stage five.
- Existing Maven warnings about duplicate test dependency and Lombok builder defaults remain outside this stage.