# Acceptance

## Implementation Result

Implemented stage four of Executor Structured Output V2:

- Added `chat_composer` prompt and Agent.
- Final answers for PASS, LOW_CONFID, and REJECT now use Composer when Verifier decision is valid.
- Composer input is filtered from Verifier decision and Executor structured output.
- Unsupported, external-unknown, and contradicted claims are excluded from confirmed final-answer material.
- REJECT Composer input has `allowed_hypotheses=[]`.
- Malformed Composer output uses deterministic safe fallback.
- Fallback does not expose raw Composer JSON, raw Executor JSON, or Executor `user_facing_answer`.
- `composer_output` is persisted in verifier audit.

## Static Verification

- Reviewed implementation diff for stage-four scope.
- `cmd /c openspec validate executor-composer-final-answer` passed.
- `cmd /c openspec validate --specs` passed before archive.

## Script Verification

Passed:

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

Coverage:

- Composer prompt loading and invocation.
- valid Composer output as final answer source.
- malformed Composer output fallback.
- PASS no raw Executor JSON leakage.
- LOW_CONFID separation of confirmed material, possible directions, and gaps.
- REJECT safe output without raw Executor answer.
- Gatekeeper and Verifier stage compatibility.

## Browser / Manual Verification

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

## OpenSpec Archive Status

Archived:

```text
openspec/changes/archive/2026-07-08-executor-composer-final-answer
```

## Remaining Risks

- Stage five still needs broader eval fixture coverage for full evidence-attribution regressions.
- Composer prompt quality can be improved after real run traces are collected.
- Existing Maven warnings about duplicate test dependency and Lombok builder defaults remain outside this stage.