Borrowing it
Nothing to install: this file belongs to sogawa-yk/mcp-gauge. 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/sogawa-yk/mcp-gauge/main/.claude/skills/functional-design/SKILL.mdgit clone --depth 1 https://github.com/sogawa-yk/mcp-gaugeWrote 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/skills/sogawa-yk/mcp-gauge/functional-design)<a href="https://agentmods.dev/skills/sogawa-yk/mcp-gauge/functional-design"><img src="https://agentmods.dev/badge/skills/sogawa-yk/mcp-gauge/functional-design/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/skills/sogawa-yk/mcp-gauge/functional-design"><img src="https://agentmods.dev/badge/skills/sogawa-yk/mcp-gauge/functional-design.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 | $0.00034 | $0.00473 |
| Opus 5 | $0.00017 | $0.00236 |
| Sonnet 5 | $0.00007 | $0.00095 |
| Haiku 4.5 | $0.00003 | $0.00047 |
Grade A, and why
functional-design 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 11d 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.
This is a copy
100% identical to functional-design — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
機能設計書作成スキル
このスキルは、高品質な機能設計書を作成するための詳細ガイドです。
前提条件
機能設計書作成を開始する前に、以下を確認してください:
docs/product-requirements.md が作成されている
必須: PRDが以下の場所に存在する必要があります:
ファイルパス: docs/product-requirements.md
機能設計書は、PRDで定義された要件を技術的に実現する方法を詳細化します。
既存ドキュメントの優先順位
重要: docs/functional-design.md に既存の機能設計書がある場合、
以下の優先順位に従ってください:
-
既存の機能設計書 (
docs/functional-design.md) - 最優先- プロジェクト固有の設計が記載されている
- このスキルのガイドより優先する
-
このスキルのガイド - 参考資料
- 汎用的なテンプレートと例
- 既存設計書がない場合、または補足として使用
新規作成時: このスキルのテンプレートとガイドを参照 更新時: 既存設計書の構造と内容を維持しながら更新
出力先
作成した機能設計書は以下に保存してください:
docs/functional-design.md
テンプレートの参照
機能設計書を作成する際は、次のテンプレートを使用してください: ./template.md
詳細ガイド
さらに詳しい作成ガイドは次のファイルを参照してください: ./guide.md
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 11d ago First seen · 53 lines · 34 tokens per session scan A 09198472125c
functional-design is a skill published in the GitHub repository sogawa-yk/mcp-gauge (0 stars, last pushed 6mo ago), licensed MIT. It adds 34 tokens to every session and 473 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to functional-design, differing in 0 lines, and is treated as a copy.
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