tdd-skills: Instructions file for Claude Code

CLAUDE.md

tdd-skills CLAUDE.md is an instructions file for Claude Code from morodomi/tdd-skills. It costs 1,405 tokens per session, scanned A, original, MIT.

A strict test-driven development workflow for Claude Code projects in PHP, Python, TypeScript, JavaScript, Flutter, and Hugo. Test-driven development, or TDD, means writing a failing test first, then adding code until it passes and improving the result afterward.

In plain words
What is it for?
Use it to plan and implement changes with TDD workflows, run the relevant tests and quality checks, and work on projects using the listed languages and frameworks.
Why use it?
It provides repeatable phases and language-specific checks for building changes around tests. This helps keep implementation, automated tests, static analysis, formatting, and review in a consistent order.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: reads .claude/ paths; mentions Claude Code.

This is morodomi/tdd-skills's own configuration. It tells Claude Code how to work on tdd-skills itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything tdd-skills configures →

Reuse

Borrowing it

Nothing to install: this file belongs to morodomi/tdd-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/morodomi/tdd-skills/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/morodomi/tdd-skills

Made for: Claude Code.

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Per session 1,405 This file is loaded in full into every session.
When invoked 1,405 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.01405 $0.01405
Opus 5 $0.00702 $0.00702
Sonnet 5 $0.00281 $0.00281
Haiku 4.5 $0.00140 $0.00140

Measured 9d ago against content hash 27d2ff520fb8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

tdd-skills CLAUDE.md 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 9d 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.md · 141 lines

How it starts

The opening of the file, as written. The whole thing — 141 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ClaudeSkills

Claude Codeを使った開発における厳格なTDDワークフローを実現するフレームワーク。

Tech Stack

  • 配布形式: Claude Code Plugins, Bash scripts
  • 対象言語: PHP, Python, TypeScript, JavaScript, Flutter, Hugo
  • 品質ツール: PHPStan, PHPUnit/Pest, pytest, mypy, Black, ESLint, Jest

Project Structure

tdd-skills/
├── plugins/                  # Claude Code Plugins
│   ├── tdd-core/             # TDD 7フェーズワークフロー + エージェント
│   │   ├── agents/           # green-worker, red-worker, reviewers
│   │   └── skills/           # tdd-init, tdd-plan, tdd-red, etc.
│   ├── tdd-php/              # PHP (PHPStan, Pint, PHPUnit)
│   ├── tdd-laravel/          # Laravel (Larastan, Pest)
│   ├── tdd-wordpress/        # WordPress (phpstan-wordpress, WPCS)
│   ├── tdd-python/           # Python (pytest, mypy, Black)
│   ├── tdd-flask/            # Flask (pytest-flask)
│   ├── tdd-ts/               # TypeScript (tsc, ESLint, Jest)
│   ├── tdd-js/               # JavaScript (ESLint, Prettier, Jest)
│   ├── tdd-hugo/             # Hugo SSG (hugo build, htmltest)
│   └── tdd-flutter/          # Flutter (dart analyze, flutter test)
├── .claude/
│   └── rules/                # 常時適用ルール (security, git-safety)
├── scripts/                  # テストスクリプト
└── docs/                     # Documentation
    └── cycles/               # TDDサイクルドキュメント

TDD Workflow

INIT → PLAN → RED → GREEN → REFACTOR → REVIEW → COMMIT

絶対ルール: エラーを見つけたら、まずテストを書く

TDD Philosophy (AI-Optimized)

Ticket-Based RED-GREEN-REFACTOR

従来のTDD(Kent Beck)は「1テストずつRED→GREEN→REFACTOR」を推奨するが、 tdd-skillsはチケット(Cycle)単位でRED→GREEN→REFACTORを回す。

従来TDD:  test1→impl1→refactor → test2→impl2→refactor → ...
tdd-skills: [test1,test2,test3] → [impl1,impl2,impl3] → refactor

Why Batch Approach for AI?

観点 人間 AIエージェント
モチベーション 早くグリーンを見たい 関係なし
デバッグ 変更が多いと難しい ログで追跡可能
並列化 1人では不可能 複数エージェント並列実行可能
コンテキスト 忘れる Cycle docで維持

References

Read the full file on GitHub · 141 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. 9d ago First seen · 141 lines · 1,405 tokens per session scan A 27d2ff520fb8

Subscribe to this mod's changes

tdd-skills CLAUDE.md is an instructions file published in the GitHub repository morodomi/tdd-skills (8 stars, last pushed 6mo ago), licensed MIT. It adds 1,405 tokens to every session, about $0.0070 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 2026-08-31.

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