Codex: Codex CLI スキル、サンドボックスと実例

codex --list-skills

# スキルを指定してタスクを実行
codex --skill code-review "Review src/auth.ts"

# オプションの組み合わせ
codex --skill security --sandbox readonly "Scan for security vulnerabilities"

# スキルディレクトリを指定
codex --skills-dir ./my-skills "Add login functionality"

<!-- .codex/skills/api-endpoint.md -->
# API Endpoint Generator

## Role
FastAPI endpoint development expert

## Rules
- Use Pydantic models
- Include error handling
- Add Swagger documentation
- Write pytest tests

## Workflow
1. Define request/response models
2. Implement endpoint logic
3. Add error handling
4. Write tests
5. Ensure pytest passes

[sandbox]
type = "docker"
image = "codex-sandbox:latest"
memory = "2g"
cpus = 2
timeout = 600

# ボリュームのマウント
volumes = [
  "./src:/workspace/src",
  "./tests:/workspace/tests",
]

# 環境変数
env = { "NODE_ENV" = "test" }

# Alice のサンドボックス設定
[sandbox]
type = "docker"
memory = "4g"
cpus = 4

# 許可する操作
allowed_commands = [
  "npm test",
  "npm run lint",
  "git status",
  "git diff",
  "tsc --noEmit",
]

# ブロックする操作
blocked_commands = [
  "rm -rf /",
  "sudo",
  "curl * | sh",
]

# リソース制限
max_file_size = "10MB"
max_execution_time = 300

codex "Initialize Next.js 14 project: TypeScript + Tailwind + ESLint + Prettier, create standard directory structure"

# エラーログから修正
cat error.log | codex --full-auto "Analyze error log, locate root cause, fix code"

# Issue から修正
codex "Fix Issue #42: Users not receiving verification email after registration"

# すべてのソースファイルのテストを生成
codex --full-auto "Generate corresponding .test.ts for all .ts files under src/, using vitest"

# テストカバレッジを補充
codex "Check test coverage, supplement tests for files below 80%"

# フレームワーク移行
codex "Refactor all Class components to functional components + Hooks"

# API 移行
codex "Migrate REST API calls to tRPC, maintain functionality"

# API ドキュメント
codex "Generate OpenAPI/Swagger docs for all API endpoints"

# README
codex "Generate README.md based on project structure and code"

# 朝：コードをプル + lint 修正
git pull
codex --full-auto "Fix all lint errors"

# 午前：新機能
codex "Add user avatar upload with crop and compression"

# 午後：バグ修正
codex "Fix payment timeout issue, add retry mechanism"

# 夕方：テスト
codex "Supplement integration tests for today's changes"

# 夜：ドキュメント
codex "Update API docs and CHANGELOG"

# 良い慣例
codex "Modify src/auth/login.ts, add 2FA support"

# 悪い慣例
codex "Add a feature to login"

codex "Optimize database query performance, ensure npm test passes, compare execution time before and after optimization"

# 複雑なタスクをステップで
codex "Step 1: Create the Order model. Output the model definition when done, I'll confirm before continuing to step 2."

codex "Create UserProfile component, follow the style of src/components/UserCard.tsx"