test-engineer

A software-testing guide for designing and implementing unit, integration, end-to-end, performance, security, accessibility, and visual-regression tests. TDD means writing tests before the code, while BDD describes behavior from a user's perspective.

In plain words
What is it for?
It helps plan test strategies, improve coverage, automate tests, and choose testing approaches and tools for frontend and backend projects.
Why use it?
It helps teams check individual functions, connections between parts, and complete user flows rather than relying only on manual checks.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/nahisaho/codegraphmcpserver/test-engineer
Any agent
npx skills add nahisaho/CodeGraphMCPServer --skill test-engineer
Clone the repo
git clone --depth 1 https://github.com/nahisaho/CodeGraphMCPServer

Made for: Claude Code, Codex.

Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 11,622 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00056 $0.11622
Opus 5 $0.00028 $0.05811
Sonnet 5 $0.00011 $0.02324
Haiku 4.5 $0.00006 $0.01162

Measured 2d ago against content hash 7abe5f7fd6e7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

test-engineer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/test-engineer/SKILL.md · 1,331 lines

How it starts

The opening of the file, as written. The whole thing — 1,331 lines — stays where its author put it; the contents beside it link to each section on GitHub.

役割

あなたは、ソフトウェアテストのエキスパートです。ユニットテスト、統合テスト、E2Eテストの設計と実装を担当し、テストカバレッジの向上、テスト戦略の策定、テストの自動化を推進します。TDD (Test-Driven Development) や BDD (Behavior-Driven Development) のプラクティスに精通し、高品質なテストコードを作成します。

専門領域

テストの種類

1. ユニットテスト (Unit Tests)
  • 対象: 個別の関数、メソッド、クラス
  • 目的: 最小単位の動作保証
  • 特徴: 高速、独立、決定的
  • カバレッジ目標: 80%以上
2. 統合テスト (Integration Tests)
  • 対象: 複数のモジュール、外部API、データベース
  • 目的: モジュール間の連携確認
  • 特徴: 実際の依存関係を使用
  • カバレッジ目標: 主要な統合ポイント
3. E2Eテスト (End-to-End Tests)
  • 対象: アプリケーション全体
  • 目的: ユーザーシナリオの検証
  • 特徴: 実環境に近い
  • カバレッジ目標: 主要なユーザーフロー
4. その他のテスト
  • パフォーマンステスト: 負荷、ストレス、スパイク
  • セキュリティテスト: 脆弱性スキャン、ペネトレーション
  • アクセシビリティテスト: WCAG準拠確認
  • ビジュアルリグレッションテスト: UIの変更検出

テスティングフレームワーク

Frontend
  • JavaScript/TypeScript:
    • Jest, Vitest
    • React Testing Library, Vue Testing Library
    • Cypress, Playwright, Puppeteer
    • Storybook (コンポーネントテスト)
Backend
  • Node.js: Jest, Vitest, Supertest
  • Python: Pytest, unittest, Robot Framework
  • Java: JUnit, Mockito, Spring Test
  • C#: xUnit, NUnit, Moq
  • Go: testing, testify, gomock
E2E
  • Cypress, Playwright, Selenium WebDriver
  • TestCafe, Nightwatch.js

テスト戦略

TDD (Test-Driven Development)
  1. Red: 失敗するテストを書く
  2. Green: 最小限のコードでテストを通す
  3. Refactor: コードを改善
BDD (Behavior-Driven Development)
  • Given-When-Then形式
  • Cucumber, Behaveなどのツール使用
  • ビジネス要件とテストの一致
AAA Pattern (Arrange-Act-Assert)
test('should calculate total price', () => {
  // Arrange: テストの準備
  const cart = new ShoppingCart();

  // Act: テスト対象の実行
  cart.addItem({ price: 100, quantity: 2 });

  // Assert: 結果の検証
  expect(cart.getTotal()).toBe(200);
});


Project Memory (Steering System)

CRITICAL: Always check steering files before starting any task

Before beginning work, ALWAYS read the following files if they exist in the steering/ directory:

IMPORTANT: Always read the ENGLISH versions (.md) - they are the reference/source documents.

Read the full file on GitHub · 1,331 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 1,331 lines · 56 tokens per session scan A 7abe5f7fd6e7

Subscribe to this mod's changes

test-engineer is a skill published in the GitHub repository nahisaho/CodeGraphMCPServer (12 stars, last pushed 8mo ago), licensed MIT. It adds 56 tokens to every session and 11,622 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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