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.
npx skills add oikon48/cc-frontend-skills --skill frontend-design-systemgit clone --depth 1 https://github.com/oikon48/cc-frontend-skillsWrote 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/oikon48/cc-frontend-skills/frontend-design-system)<a href="https://agentmods.dev/skills/oikon48/cc-frontend-skills/frontend-design-system"><img src="https://agentmods.dev/badge/skills/oikon48/cc-frontend-skills/frontend-design-system/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/oikon48/cc-frontend-skills/frontend-design-system"><img src="https://agentmods.dev/badge/skills/oikon48/cc-frontend-skills/frontend-design-system.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 | $0.00092 | $0.01592 |
| Opus 5 | $0.00046 | $0.00796 |
| Sonnet 5 | $0.00018 | $0.00318 |
| Haiku 4.5 | $0.00009 | $0.00159 |
Grade A, and why
frontend-design-system 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.
How it starts
The opening of the file, as written. The whole thing — 153 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Frontend Design System
Overview
このスキルは、AIが生成しがちな「汎用的で無個性なデザイン」を避け、洗練された独自性のあるフロントエンドUIを作成するためのガイドラインです。
Anti-Patterns(避けるべきパターン)
以下のパターンは「AIスロップ美学」と呼ばれ、避けるべきです:
Typography(タイポグラフィ)
- ❌ Inter, Roboto, Open Sans などの過度に使用されたフォント
- ❌ すべてのテキストに同じフォントファミリーを使用
- ❌ 標準的なフォントウェイトのみの使用
Colors(カラー)
- ❌ 紫からピンクへのグラデーション
- ❌ 汎用的な青/緑のアクセントカラー
- ❌ 彩度の高すぎるネオンカラー
- ❌ デフォルトのTailwindカラーパレットそのまま
Layout(レイアウト)
- ❌ 左テキスト・右画像の標準ヒーローセクション
- ❌ 3カラムの均等グリッド機能セクション
- ❌ 中央揃えの単調なカードレイアウト
Effects(エフェクト)
- ❌ 過度なぼかし効果(blur)
- ❌ 全要素へのアニメーション適用
- ❌ グラスモーフィズムの乱用
Best Practices(推奨パターン)
Typography
推奨フォントの組み合わせ例:
| ヘッダー | ボディ | 特徴 |
|---|---|---|
| Playfair Display | Source Sans Pro | クラシック&モダン |
| Space Grotesk | Inter | テック&ミニマル |
| Fraunces | Work Sans | エレガント&読みやすい |
| DM Serif Display | DM Sans | 統一感のある対比 |
| Syne | Outfit | 大胆&現代的 |
タイポグラフィ原則:
- 見出しと本文で異なるフォントファミリーを使用(セリフ×サンセリフの組み合わせ)
- フォントウェイトのバリエーションを活用(300, 400, 600, 800)
- レタースペーシングで視覚的階層を作成
Colors
カラーパレット構築原則:
プライマリ:ブランドアイデンティティを表す主色
セカンダリ:プライマリを補完する色(補色または類似色)
アクセント:CTAやハイライトに使用する注目色
ニュートラル:背景やテキストに使用するグレー系
独自性を出すテクニック:
- HSL調整で微妙な色相のずれを作る
- ダークモードでは彩度を下げ、明度を調整
- セマンティックカラー(success, warning, error)もブランドに合わせて調整
Layout
差別化するレイアウトパターン:
- 非対称グリッド(5:7, 2:3比率)
- オーバーラップ要素とネガティブマージン
- 斜めのセクション区切り
- ベントグリッドと有機的な配置
- 大胆な余白(ホワイトスペース)の活用
Animation & Motion
効果的なアニメーション原則:
-
高影響度の瞬間に集中
- ページロード時の単一の調整されたアニメーション
- ユーザーアクション(クリック、ホバー)への即座のフィードバック
- 状態変化(成功、エラー)の視覚的表現
-
タイミングの指針
- マイクロインタラクション: 150-300ms
- ページ遷移: 300-500ms
- 複雑なアニメーション: 500-800ms
-
イージング関数
/* 推奨イージング */ --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1); --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1); --ease-in-out-quart: cubic-bezier(0.76, 0, 0.24, 1);
Background & Texture
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 · 153 lines · 92 tokens per session scan A a33f069168db
frontend-design-system is a skill published in the GitHub repository oikon48/cc-frontend-skills (69 stars, last pushed 9mo ago), licensed MIT. It adds 92 tokens to every session and 1,592 once invoked, about $0.0005 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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