# MVP Demo Trace Acceptance

## Result

Accepted for implementation scope.

## Verification

### Static Verification

- Command: `mvn -q -DskipTests compile`
- Result: passed
- Notes: New trace controller, service, DTO, profile, verifier fallback, and test sources compile with the project.

### Script Verification

- Command: `mvn -q "-Dtest=DiagnosisTraceServiceTest,ChatServiceSupervisorAgentTest" test`
- Result: passed
- Notes: Covers successful trace aggregation, missing-session 404 path via `SessionNotFoundException`, low-confidence no-retry behavior, method-tool injection, and verifier fallback when Supervisor skips `chat_verifier`.

### OpenSpec Verification

- Command: `openspec validate mvp-demo-trace-acceptance --strict`
- Result: passed

### GitNexus Verification

- Result: skipped by user decision
- Notes: User requested subsequent project flow to bypass GitNexus.

### Manual / Runtime Verification

- Steps: Follow `mvp/demo/README.md` with `--spring.profiles.active=mvp-demo`.
- Result: passed
- Notes:
  - Session `mvp-demo-payment-timeout-20260703-rerun2` completed as `SUCCESS`.
  - Chat request returned `code=200`, `success=true`, and the same `sessionId`.
  - Chat duration was `96316 ms`; persisted session duration was `95028 ms`.
  - Trace API returned `code=200`, `returnedSteps=13`, `returnedTools=12`, `hasVerifier=true`, and `verifierVerdict=LOW_CONFID`.
  - Trace agents included `planner,executor,verifier`.
  - Trace tools included `lookup_knowledge,query_logs,query_metrics`.
  - Feedback submission returned success, and a follow-up trace query showed `feedback=useful`.
  - MySQL verification confirmed `agent_step` count `13` with agents `executor,planner,verifier`.
  - MySQL verification confirmed `tool_invocation` count `12` with tools `lookup_knowledge,query_logs,query_metrics`.

## Completed Scope

- Added `GET /api/diagnosis/{sessionId}/trace`.
- Added read-only trace aggregation from persisted diagnosis tables.
- Added `mvp-demo` profile overlay.
- Added payment-timeout demo acceptance documentation.
- Added MVP note for interview storytelling.
- Added verifier fallback so runtime trace remains complete when Supervisor returns without `verifier_output`.

## Known Limits

- `mvp-demo` is not a fully offline mock runtime.
- Runtime still depends on available MySQL, Redis, Milvus/Zilliz, model, and embedding configuration.
- Sensitive configuration cleanup remains intentionally deferred.
- Supervisor can still make inefficient routing choices inside a single round; `ChatService` now invokes `chat_verifier` as a fallback when Supervisor returns without `verifier_output`, so trace completeness is preserved for the MVP demo.

## Handoff

- Runtime demo passed with current infrastructure.
- OpenSpec archive confirmation: requested by user after successful rerun.