# Complete - m-performance-hotspot-optimization/10_dart_isolate_gateway_contract

## 완료 일시

2026-06-06

## 요약

Dart isolate inbound gateway contract hardening 구현을 1회 리뷰했고 최종 판정은 PASS다.

## 루프 이력

| Plan | Review | Verdict | 메모 |
|------|--------|---------|------|
| `plan_cloud_G08_0.log` | `code_review_cloud_G08_0.log` | PASS | Async submit/backpressure, ordered decode error, cleanup snapshot 구현과 검증이 계획 범위를 충족했다. |

## 구현/정리 내용

- `InboundGateway.submit`을 async backpressure contract로 바꾸고 `inFlightCount`/`queuedCount` 계측을 추가했다.
- `DecodedFrame.error`와 worker try/catch를 통해 malformed frame을 ordered error result로 전달하고 connection cleanup으로 연결했다.
- `FrameReorderBuffer.clear` 및 IO/Web gateway cleanup contract를 정리하고 관련 Dart tests를 추가했다.

## 최종 검증

- `dart pub get` - PASS; dependencies resolved, newer incompatible package notices only.
- `dart test test/communicator_test.dart -r expanded` - PASS; 26 tests passed.
- `dart test` - PASS; 67 tests passed.
- `dart compile js test/browser_ws_import_compile.dart -o /tmp/proto_socket_browser_ws_import_compile.js` - PASS; JavaScript output generated.
- `dart analyze` - PASS for changed files; existing info remains at `lib/src/heartbeat_mixin.dart:13:16` for missing `@override`.

## Roadmap Completion

- Milestone: `agent-roadmap/milestones/performance-hotspot-optimization.md`
- Completed task ids:
  - `dart-isolate-backpressure`: PASS; evidence=`agent-task/archive/2026/06/m-performance-hotspot-optimization/10_dart_isolate_gateway_contract/plan_cloud_G08_0.log`, `agent-task/archive/2026/06/m-performance-hotspot-optimization/10_dart_isolate_gateway_contract/code_review_cloud_G08_0.log`; verification=`dart test test/communicator_test.dart -r expanded`, `dart test`, `dart compile js test/browser_ws_import_compile.dart -o /tmp/proto_socket_browser_ws_import_compile.js`
  - `dart-isolate-error-ordering`: PASS; evidence=`agent-task/archive/2026/06/m-performance-hotspot-optimization/10_dart_isolate_gateway_contract/plan_cloud_G08_0.log`, `agent-task/archive/2026/06/m-performance-hotspot-optimization/10_dart_isolate_gateway_contract/code_review_cloud_G08_0.log`; verification=`dart test test/communicator_test.dart -r expanded`, `dart test`
  - `dart-isolate-cleanup`: PASS; evidence=`agent-task/archive/2026/06/m-performance-hotspot-optimization/10_dart_isolate_gateway_contract/plan_cloud_G08_0.log`, `agent-task/archive/2026/06/m-performance-hotspot-optimization/10_dart_isolate_gateway_contract/code_review_cloud_G08_0.log`; verification=`dart test test/communicator_test.dart -r expanded`, `dart test`
- Not completed task ids: 없음

## 잔여 Nit

- 없음

## 후속 작업

- 없음
