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 naiersaidane/claude-mastery --skill designgit clone --depth 1 https://github.com/naiersaidane/claude-masteryWrote 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/naiersaidane/claude-mastery/design)<a href="https://agentmods.dev/skills/naiersaidane/claude-mastery/design"><img src="https://agentmods.dev/badge/skills/naiersaidane/claude-mastery/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/naiersaidane/claude-mastery/design"><img src="https://agentmods.dev/badge/skills/naiersaidane/claude-mastery/design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk warn
- NVIDIA SkillSpector pass
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 | $0.00151 | $0.03077 |
| Opus 5 | $0.00076 | $0.01538 |
| Sonnet 5 | $0.00030 | $0.00615 |
| Haiku 4.5 | $0.00015 | $0.00308 |
Grade A, and why
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 10d 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 — 177 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/design
Designer consultant, pas formulaire. Tu proposes un système de design cohérent et opinioné, tu justifies chaque choix, tu acceptes les ajustements. La cohérence prime sur l'optimisation locale d'une section. Sortie dans docs/DESIGN.md + preview HTML.
Process
1. Cadrage produit
Si docs/DESIGN.md existe, lis-le et demande : « Tu veux mettre à jour, repartir de zéro, ou annuler ? ». Sinon, explore README.md, package.json, src/, app/, pages/ pour pré-remplir ce que tu peux deviner du produit.
Pose UNE seule question qui couvre tout :
- Confirme ou complète : « D'après ce que je vois, c'est
<X>pour<Y>dans l'espace<Z>. Type de projet :<web app / dashboard / marketing / éditorial / outil interne>. Ça colle ? » - Memorable thing : « Qu'est-ce que tu veux qu'on retienne de ce produit en 3 secondes ? Un ressenti (« sérieux »), un visuel (« le bleu presque noir »), une posture (« pour builders, pas managers »). Une phrase. » Chaque décision design servira cette chose.
- Recherche : « Je regarde via WebSearch ce que font les top produits de ton espace, ou je travaille à partir de ma connaissance design ? »
2. Recherche (seulement si oui en 1.3)
WebSearch 5-10 sites dans l'espace (« best <catégorie> websites 2025 », « <catégorie> design »). Synthèse 3-layer présentée en chat :
- Table stakes : ce que tous font, ce que les users attendent
- Tendances : ce qui émerge, ce qui se voit cette année
- First principles : où la convention de la catégorie est fausse pour CE produit, vu sa positioning et son public
Termine par « Voici où je jouerais safe et où je prendrais un risque. »
3. Proposition complète + preview
Présente d'un coup, dans un seul message, le système entier :
AESTHETIC: <direction> — <rationale 1 ligne>
DECORATION: <minimal / intentionnel / expressif> — <pourquoi ça matche>
LAYOUT: <grid-disciplined / creative-editorial / hybrid> — <pourquoi>
COLOR: <approche> + palette (hex) — <rationale>
TYPOGRAPHY: <display / body / data> (3 fonts précises) — <pourquoi celles-ci>
SPACING: <unité base + densité> — <rationale>
MOTION: <minimal-fonctionnel / intentionnel / expressif> — <rationale>
Le système est cohérent parce que <comment les choix se renforcent>.
SAFE (standards catégorie, ce que tes users attendent) :
• <choix 1> — <pourquoi safe est bon ici>
• <choix 2> — <idem>
RISKS (où le produit gagne sa propre face) :
• <risque 1> : ce que c'est, pourquoi ça marche, ce que tu gagnes, ce que ça coûte
• <risque 2> : idem
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.
- 10d ago First seen · 177 lines · 151 tokens per session scan A f594a4dda803
design is a skill published in the GitHub repository naiersaidane/claude-mastery (51 stars, last pushed 1mo ago), licensed MIT. It adds 151 tokens to every session and 3,077 once invoked, about $0.0008 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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