<!-- task=03_typescript_crosstest_process_cleanup plan=0 tag=TEST -->

# Code Review Reference - TEST

> **[IMPLEMENTING AGENT — READ FIRST] Filling in this file is the mandatory final step of implementation.**
> The task is NOT complete until every implementation-owned section below is filled in.
> Complete the `구현 체크리스트`; the final checklist item is mandatory before saving.
> Do not modify or check the `코드리뷰 전용 체크리스트`; it is owned by the review agent only.
> Follow the ownership table at the bottom of this file for which sections you own.

## 개요

date=2026-05-21
task=03_typescript_crosstest_process_cleanup, plan=0, tag=TEST

## 이 파일을 읽는 리뷰 에이전트에게

각 항목의 구현을 실제 소스 파일과 대조하고, `검증 결과` 섹션의 출력이 코드와 일치하는지 확인하세요.
리뷰 완료는 아래 순서까지 끝난 상태를 의미합니다.

1. 판정을 append한다.
2. `CODE_REVIEW-cloud-G07.md` → `code_review_cloud_G07_0.log`, `PLAN-cloud-G07.md` → `plan_cloud_G07_0.log`로 아카이브한다.
3. PASS이면 `complete.log` 작성 후 task 디렉터리를 `agent-task/archive/YYYY/MM/03_typescript_crosstest_process_cleanup/`로 이동한다. WARN/FAIL이면 다음 active plan/review 파일을 즉시 작성한다.
4. 적용 가능한 `코드리뷰 전용 체크리스트` 항목을 최종 `.log` 위치에서 체크한 뒤 보고한다.

---

## 구현 항목별 완료 여부

| 항목 | 완료 여부 |
|------|---------|
| [TEST-1] Harden TypeScript child process cleanup | [x] |

## 구현 체크리스트

- [x] 네 TypeScript server runner의 `runClientProcess`에 process group-aware kill helper를 적용한다.
- [x] stdout/stderr `Promise.all`에 bounded stream join timeout을 적용한다.
- [x] `npm run check`로 TypeScript 타입 오류가 없는지 확인한다.
- [x] 중간 검증과 최종 검증 명령을 실행하고 실제 출력을 기록한다.
- [x] CODE_REVIEW-*-G??.md의 구현 에이전트 소유 섹션을 실제 구현 내용과 검증 출력으로 채운다. 이 항목이 완료되기 전에는 구현이 완료된 것이 아니다.

## 코드리뷰 전용 체크리스트

> **[REVIEW AGENT ONLY]** 이 체크리스트는 코드리뷰 에이전트만 사용한다.
> 구현 에이전트는 이 섹션을 수정하거나 체크하지 않는다.

- [x] `코드리뷰 결과`에 `PASS`, `WARN`, `FAIL` 중 하나의 판정을 append한다.
- [x] 판정과 `차원별 평가`, Required/Suggested/Nit 분류가 서로 일치한다.
- [x] active `CODE_REVIEW-*-G??.md`를 `code_review_cloud_G07_0.log`로 아카이브한다.
- [x] active `PLAN-*-G??.md`를 `plan_cloud_G07_0.log`로 아카이브한다.
- [x] PASS이면 `agent-ops/skills/common/code-review/templates/complete-log-template.md` 기준으로 `complete.log`를 작성하고 active `.md` 파일을 남기지 않는다.
- [x] PASS이면 `agent-task/{task_name}/`를 `agent-task/archive/YYYY/MM/{task_name}/`로 이동하고 최종 archive 경로에서 이 체크리스트를 갱신한다.
- [ ] WARN/FAIL이면 다음 active `PLAN-cloud-G07.md`와 `CODE_REVIEW-cloud-G07.md`를 작성하고 `complete.log`를 작성하지 않는다.

## 계획 대비 변경 사항

없음. 계획과 동일하게 구현했다.

## 주요 설계 결정

- `killProcessTree`는 POSIX에서 `process.kill(-child.pid, "SIGKILL")`로 process group 전체를 kill한다. Windows이거나 pid가 없으면 `child.kill("SIGKILL")`로 fallback한다.
- `detached: process.platform !== "win32"`를 spawn에 추가해 POSIX에서 process group leader로 만든다.
- stream join은 `withTimeout(..., STREAM_JOIN_TIMEOUT_MS, ...)` 5초로 제한한다. `withTimeout`은 이미 각 파일에 정의되어 있어 재사용했다.

## 리뷰어를 위한 체크포인트

- 네 TypeScript runner 모두 process group-aware timeout kill과 stream join timeout을 갖는지 확인한다.
- POSIX process group kill 실패 시 direct child kill fallback이 있는지 확인한다.
- `npm run check`가 실제 검증 결과에 포함됐는지 확인한다.

## 검증 결과

### TEST-1 중간 검증
```bash
$ cd typescript && npm run check

> proto-socket@1.0.5 check
> tsc --noEmit
```

exit code 0.

### 최종 검증
```bash
$ cd typescript && npm run check && npm test

> proto-socket@1.0.5 check
> tsc --noEmit


> proto-socket@1.0.5 test
> vitest run


 RUN  v3.2.4 /config/workspace/proto-socket/typescript

 ✓ test/base_client.test.ts (7 tests) 7ms
 ✓ test/communicator.test.ts (10 tests) 18ms
 ✓ test/browser_ws_client.test.ts (6 tests) 18ms
 ✓ test/tcp.test.ts (5 tests) 54ms
 ✓ test/ws.test.ts (6 tests) 1076ms
   ✓ WS > connectNodeWss rejects when peer never completes WebSocket handshake  1015ms

 Test Files  5 passed (5)
      Tests  34 passed (34)
   Start at  17:02:02
   Duration  1.53s (transform 494ms, setup 0ms, collect 744ms, tests 1.17s, environment 1ms, prepare 530ms)
```

```bash
$ cd typescript && ./node_modules/.bin/tsx crosstest/typescript_dart.ts

INFO typeName ts=TestData
INFO typeName dart=TestData
SERVER_RECEIVED index=101 message=fire from dart client
PASS scenario=1 detail=fire-and-forget sent
PASS scenario=2 detail=received push from typescript server
INFO typeName dart=TestData
PASS scenario=3 detail=single request response matched
PASS scenario=4 detail=concurrent request responses matched
INFO typeName dart=TestData
SERVER_RECEIVED index=101 message=fire from dart client
PASS scenario=1 detail=fire-and-forget sent
PASS scenario=2 detail=received push from typescript server
INFO typeName dart=TestData
PASS scenario=3 detail=single request response matched
PASS scenario=4 detail=concurrent request responses matched
INFO typeName dart=TestData
PASS scenario=1 detail=fire-and-forget sent
SERVER_RECEIVED index=101 message=fire from dart client
PASS scenario=2 detail=received push from typescript server
INFO typeName dart=TestData
PASS scenario=3 detail=single request response matched
PASS scenario=4 detail=concurrent request responses matched
INFO typeName dart=TestData
PASS scenario=1 detail=fire-and-forget sent
SERVER_RECEIVED index=101 message=fire from dart client
PASS scenario=2 detail=received push from typescript server
INFO typeName dart=TestData
PASS scenario=3 detail=single request response matched
PASS scenario=4 detail=concurrent request responses matched
PASS all typescript-server/dart-client crosstests passed
```

```bash
$ cd typescript && ./node_modules/.bin/tsx crosstest/typescript_go.ts

INFO typeName ts=TestData
INFO typeName go=TestData
SERVER_RECEIVED index=101 message=fire from go client
PASS scenario=1 detail=fire-and-forget sent
PASS scenario=2 detail=received push from typescript server
INFO typeName go=TestData
PASS scenario=3 detail=single request response matched
PASS scenario=4 detail=concurrent request responses matched
INFO typeName go=TestData
SERVER_RECEIVED index=101 message=fire from go client
PASS scenario=1 detail=fire-and-forget sent
PASS scenario=2 detail=received push from typescript server
INFO typeName go=TestData
PASS scenario=3 detail=single request response matched
PASS scenario=4 detail=concurrent request responses matched
INFO typeName go=TestData
SERVER_RECEIVED index=101 message=fire from go client
PASS scenario=1 detail=fire-and-forget sent
PASS scenario=2 detail=received push from typescript server
INFO typeName go=TestData
PASS scenario=3 detail=single request response matched
PASS scenario=4 detail=concurrent request responses matched
INFO typeName go=TestData
SERVER_RECEIVED index=101 message=fire from go client
PASS scenario=1 detail=fire-and-forget sent
PASS scenario=2 detail=received push from typescript server
INFO typeName go=TestData
PASS scenario=3 detail=single request response matched
PASS scenario=4 detail=concurrent request responses matched
PASS all typescript-server/go-client crosstests passed
```

```bash
$ cd typescript && ./node_modules/.bin/tsx crosstest/typescript_python.ts

INFO typeName ts=TestData
SERVER_RECEIVED index=101 message=fire from python client
INFO typeName python=TestData
PASS scenario=1 detail=fire-and-forget sent
PASS scenario=2 detail=received push from typescript server
INFO typeName python=TestData
PASS scenario=3 detail=single request response matched
PASS scenario=4 detail=concurrent request responses matched
SERVER_RECEIVED index=101 message=fire from python client
INFO typeName python=TestData
PASS scenario=1 detail=fire-and-forget sent
PASS scenario=2 detail=received push from typescript server
INFO typeName python=TestData
PASS scenario=3 detail=single request response matched
PASS scenario=4 detail=concurrent request responses matched
SERVER_RECEIVED index=101 message=fire from python client
INFO typeName python=TestData
PASS scenario=1 detail=fire-and-forget sent
PASS scenario=2 detail=received push from typescript server
INFO typeName python=TestData
PASS scenario=3 detail=single request response matched
PASS scenario=4 detail=concurrent request responses matched
SERVER_RECEIVED index=101 message=fire from python client
INFO typeName python=TestData
PASS scenario=1 detail=fire-and-forget sent
PASS scenario=2 detail=received push from typescript server
INFO typeName python=TestData
PASS scenario=3 detail=single request response matched
PASS scenario=4 detail=concurrent request responses matched
PASS all typescript-server/python-client crosstests passed
```

```bash
$ cd typescript && ./node_modules/.bin/tsx crosstest/typescript_kotlin.ts

INFO typeName ts=TestData
> Task :checkKotlinGradlePluginConfigurationErrors SKIPPED
> Task :extractIncludeProto UP-TO-DATE
> Task :extractProto UP-TO-DATE
> Task :generateProto UP-TO-DATE
> Task :compileKotlin UP-TO-DATE
> Task :compileJava
> Task :processResources UP-TO-DATE
> Task :classes
> Task :extractCrosstestProto UP-TO-DATE
> Task :extractIncludeCrosstestProto UP-TO-DATE
> Task :generateCrosstestProto NO-SOURCE
> Task :compileCrosstestKotlin UP-TO-DATE
> Task :compileCrosstestJava NO-SOURCE
> Task :processCrosstestResources NO-SOURCE
> Task :crosstestClasses UP-TO-DATE
SERVER_RECEIVED index=101 message=fire from kotlin client

> Task :run
INFO typeName kotlin=TestData
PASS scenario=1 detail=fire-and-forget sent
PASS scenario=2 detail=received push from typescript server

BUILD SUCCESSFUL in 1s
10 actionable tasks: 2 executed, 8 up-to-date
[...subsequent phases all PASS...]
PASS all typescript-server/kotlin-client crosstests passed
```

```bash
$ rg --sort path -n "STREAM_JOIN_TIMEOUT_MS|killProcessTree|detached: process\.platform|streams did not finish|Promise\.all\(\[stdoutDone, stderrDone\]\)" typescript/crosstest/typescript_dart.ts typescript/crosstest/typescript_go.ts typescript/crosstest/typescript_python.ts typescript/crosstest/typescript_kotlin.ts

typescript/crosstest/typescript_dart.ts:31:const STREAM_JOIN_TIMEOUT_MS = 5_000;
typescript/crosstest/typescript_dart.ts:322:    detached: process.platform !== "win32",
typescript/crosstest/typescript_dart.ts:344:    killProcessTree(child);
typescript/crosstest/typescript_dart.ts:358:    Promise.all([stdoutDone, stderrDone]),
typescript/crosstest/typescript_dart.ts:359:    STREAM_JOIN_TIMEOUT_MS,
typescript/crosstest/typescript_dart.ts:360:    `${label} streams did not finish`,
typescript/crosstest/typescript_dart.ts:408:function killProcessTree(child: childProcess.ChildProcess): void {
typescript/crosstest/typescript_go.ts:31:const STREAM_JOIN_TIMEOUT_MS = 5_000;
typescript/crosstest/typescript_go.ts:322:    detached: process.platform !== "win32",
typescript/crosstest/typescript_go.ts:344:    killProcessTree(child);
typescript/crosstest/typescript_go.ts:358:    Promise.all([stdoutDone, stderrDone]),
typescript/crosstest/typescript_go.ts:359:    STREAM_JOIN_TIMEOUT_MS,
typescript/crosstest/typescript_go.ts:360:    `${label} streams did not finish`,
typescript/crosstest/typescript_go.ts:408:function killProcessTree(child: childProcess.ChildProcess): void {
typescript/crosstest/typescript_python.ts:31:const STREAM_JOIN_TIMEOUT_MS = 5_000;
typescript/crosstest/typescript_python.ts:322:    detached: process.platform !== "win32",
typescript/crosstest/typescript_python.ts:344:    killProcessTree(child);
typescript/crosstest/typescript_python.ts:358:    Promise.all([stdoutDone, stderrDone]),
typescript/crosstest/typescript_python.ts:359:    STREAM_JOIN_TIMEOUT_MS,
typescript/crosstest/typescript_python.ts:360:    `${label} streams did not finish`,
typescript/crosstest/typescript_python.ts:408:function killProcessTree(child: childProcess.ChildProcess): void {
typescript/crosstest/typescript_kotlin.ts:31:const STREAM_JOIN_TIMEOUT_MS = 5_000;
typescript/crosstest/typescript_kotlin.ts:326:    detached: process.platform !== "win32",
typescript/crosstest/typescript_kotlin.ts:348:    killProcessTree(child);
typescript/crosstest/typescript_kotlin.ts:362:    Promise.all([stdoutDone, stderrDone]),
typescript/crosstest/typescript_kotlin.ts:363:    STREAM_JOIN_TIMEOUT_MS,
typescript/crosstest/typescript_kotlin.ts:364:    `${label} streams did not finish`,
typescript/crosstest/typescript_kotlin.ts:412:function killProcessTree(child: childProcess.ChildProcess): void {
```

---

> **[IMPLEMENTING AGENT — BEFORE SAVING] Have you filled in every implementation-owned section: completion table, implementation checklist, changes from plan, design decisions, and verification output?**
> If anything is blank, go back and fill it in before saving this file.
> Leave the review-agent-only checklist unchanged.

## 코드리뷰 결과

### 종합 판정

PASS

### 차원별 평가

| 차원 | 평가 | 근거 |
|------|------|------|
| Correctness | Pass | 네 TypeScript crosstest runner 모두 POSIX process group kill, direct child fallback, bounded stream join을 동일하게 적용했다. |
| Completeness | Pass | 계획과 리뷰 stub의 구현 체크리스트가 일치하고, 구현 에이전트 소유 체크리스트가 모두 완료됐다. |
| Test coverage | Pass | 계획상 별도 unit test 없이 실제 crosstest runner와 `npm run check`, `npm test`로 검증하는 범위를 충족했다. |
| API contract | Pass | public API 변경 없이 runner 내부 process lifecycle 처리만 변경했다. |
| Code quality | Pass | 불필요한 debug 출력, dead code, TODO 없이 기존 파일 패턴을 유지했다. |
| Plan deviation | Pass | 계획 범위인 `typescript/crosstest/typescript_{dart,go,python,kotlin}.ts`만 수정했다. |
| Verification trust | Pass | 기록된 검증 명령을 재실행했고 모두 exit code 0으로 통과했다. |

### 발견된 문제

없음.

### 다음 단계

PASS: active plan/review 파일을 로그로 아카이브하고 `complete.log` 작성 후 task 디렉터리를 archive로 이동한다.
