Borrowing it
Nothing to install: this file belongs to noboru-i/web-development-toolbox. 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/noboru-i/web-development-toolbox/main/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/noboru-i/web-development-toolboxWrote 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/noboru-i/web-development-toolbox/copilot-instructions)<a href="https://agentmods.dev/instructions/noboru-i/web-development-toolbox/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/noboru-i/web-development-toolbox/copilot-instructions/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/noboru-i/web-development-toolbox/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/noboru-i/web-development-toolbox/copilot-instructions.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 | $0.00280 | $0.00280 |
| Opus 5.5 | $0.00112 | $0.00112 |
| Sonnet 5.5 | $0.00056 | $0.00056 |
| Haiku 4.5 | $0.00028 | $0.00028 |
Grade A, and why
web-development-toolbox copilot-instructions.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.
What it actually says
Web Development Toolbox コーディング規約
このドキュメントは、このプロジェクトのコーディング規約とベストプラクティスをまとめたものです。 GitHub Copilot はこの指示に従ってコード生成やサポートを提供します。
コーディング規則
- コードのコメントは必ず英語で記述してください
- 変数名や関数名は英語で、意味が明確になるように命名してください
- コードは可読性を重視し、適切なインデントとフォーマットを使用してください
TypeScript コーディングスタイル
- 関数は可能な限り単一責任の原則に従って設計してください
- 複雑なロジックは独立した関数として切り出してください
- 型定義は明示的に行い、
anyの使用は避けてください - 関数には適切な JSDoc コメントを英語で付けてください
- エクスポートする関数と内部関数を明確に区別してください
JSDoc コメント形式
コメントは JSDoc タグを活用して記載してください
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 · 23 lines · 280 tokens per session scan A 6d28b3d6b0b6
web-development-toolbox copilot-instructions.md is an instructions file published in the GitHub repository noboru-i/web-development-toolbox (5 stars, last pushed 1y ago), licensed MIT. It adds 280 tokens to every session, about $0.0011 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.
web-development-toolbox copilot-instructions.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| web-development-toolbox copilot-instructions.mdnoboru-i/web-development-toolbox | Instructions file | 5 | 1y ago | MIT | A | 280 | GitHub Copilot |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | 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 | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |