Borrowing it
Nothing to install: this file belongs to arkatom/ai-instructions. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/arkatom/ai-instructions/main/CLAUDE.mdgit clone --depth 1 https://github.com/arkatom/ai-instructionsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/arkatom/ai-instructions/claude-md)<a href="https://agentmods.dev/instructions/arkatom/ai-instructions/claude-md"><img src="https://agentmods.dev/badge/instructions/arkatom/ai-instructions/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/arkatom/ai-instructions/claude-md"><img src="https://agentmods.dev/badge/instructions/arkatom/ai-instructions/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.01031 | $0.01031 |
| Opus 5.5 | $0.00412 | $0.00412 |
| Sonnet 5.5 | $0.00206 | $0.00206 |
| Haiku 4.5 | $0.00103 | $0.00103 |
Grade A, and why
ai-instructions 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 2mo 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.
How it starts
The opening of the file, as written. The whole thing — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AI開発指示
🎯 核心原則（必須読込）
品質基準
- 品質優先: 速さより正確性と完全性
- 深層思考: 表面的な理解を避け、本質を把握
- 価値提供: 期待を超える成果を目指す
実行フロー
- 分析 → 要求の本質を理解
- 計画 → 最適なアプローチを選択
- 実装 → 品質基準を満たす実行
- 検証 → 結果の妥当性を確認
📚 必須参照
コア指示（常時適用）
場面別指示（自動判断）
| 場面 | 参照ファイル | 適用条件 |
|---|---|---|
| Git操作 | Git運用 | commit/PR/branch操作時 |
| TDD開発 | TDD手法 | テスト駆動開発時 |
| Issue管理 | Issue駆動 | Issue関連作業時 |
| デバッグ | デバッグ思考 | 問題調査・原因分析時 |
| 協働作業 | 協働インターフェース | 人間/AI間の情報交換時 |
失敗防止ガイド（常時参照）
| 技術 | 参照ファイル | 重要度 |
|---|---|---|
| TypeScript | TypeScript失敗防止 | 必須 |
| React | React失敗防止 | 必須 |
| JavaScript | JavaScript失敗防止 | 必須 |
| Python | Python失敗防止 | 必須 |
| Testing | テスト失敗防止 | 必須 |
🔧 ツール活用
優先順位
- 専用ツール → 利用可能なら最優先
- エージェント → 複雑なタスクは適切に委任
- コマンド → ツールがない場合のみ
記録管理
- 重要事項 → Issue/memoryに記録
- 作業記録 → ノート形式で保存
⚠️ 重要制約
してはいけないこと
- コード重複・散在
- 不要ファイルの放置
- 表面的な理解での実装
- 適当な推測や仮定
必ずすること
- 参照確認:
✅:{filename.md}を出力 - 適当度評価: 1-10で自己評価（5以上なら再考）
- 完全性確認: ユーザーが追加質問不要な状態
📂 構造規約
project/
├── docs/ # ドキュメント集約
├── instructions/ # AI指示（このファイル群）
│ ├── core/ # 思考プロセス
│ ├── guidelines/ # 失敗防止ガイド
│ └── methodologies/ # 開発手法
├── references/ # 実装例（人間向け）
│ └── patterns/ # 具体的実装パターン
└── src/ # ソースコード
🎨 patterns/について
references/patterns/配下のファイルは開発者向けリファレンスです。
AIは必要と判断した場合のみ参照してください。
過度な具体例への依存は創造性を制限します。
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.
- 2mo ago First seen · 91 lines · 1,031 tokens per session scan A f65bf198fe07
ai-instructions CLAUDE.md is an instructions file published in the GitHub repository arkatom/ai-instructions (1 stars, last pushed 11mo ago), licensed MIT. It adds 1,031 tokens to every session, about $0.0041 per session on Opus 5.5. 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.
ai-instructions CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| ai-instructions CLAUDE.mdarkatom/ai-instructions | Instructions file | 1 | 11mo ago | MIT | A | 1,031 | Claude Code |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| vscode model-prompts.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 2,022 | GitHub Copilot |