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 mhrsdev/AI-Agent-Skills-Library --skill responsive-css-mobile-viewportgit clone --depth 1 https://github.com/mhrsdev/AI-Agent-Skills-LibraryWrote 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/mhrsdev/ai-agent-skills-library/responsive-css-mobile-viewport)<a href="https://agentmods.dev/skills/mhrsdev/ai-agent-skills-library/responsive-css-mobile-viewport"><img src="https://agentmods.dev/badge/skills/mhrsdev/ai-agent-skills-library/responsive-css-mobile-viewport/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/mhrsdev/ai-agent-skills-library/responsive-css-mobile-viewport"><img src="https://agentmods.dev/badge/skills/mhrsdev/ai-agent-skills-library/responsive-css-mobile-viewport.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 | $0.00024 | $0.00115 |
| Opus 5 | $0.00012 | $0.00057 |
| Sonnet 5 | $0.00005 | $0.00023 |
| Haiku 4.5 | $0.00002 | $0.00012 |
Grade A, and why
responsive-css-mobile-viewport 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 7d 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
Responsive CSS mobile viewport
- Put visual mobile navigation changes inside the mobile media query only.
- Use fixed positioning for mobile drawer/backdrop.
- Use clear z-index layering: header below drawer controls, backdrop below drawer.
- Prefer
100dvhfor mobile viewport height when needed. - If menu content can exceed viewport height, make the drawer scroll internally.
- Closed drawer/backdrop must not receive pointer events.
What ships with it
1 file 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.
- 7d ago First seen · 13 lines · 24 tokens per session scan A 6be0450c108c
responsive-css-mobile-viewport is a skill published in the GitHub repository mhrsdev/AI-Agent-Skills-Library (6 stars, last pushed 2mo ago), licensed MIT. It adds 24 tokens to every session and 115 once invoked, about $0.0001 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 2026-09-03.
Other skills, from other repositories
mockup-extraction
Extract reusable components from approved HTML mockups during implementation. Identifies patterns, maps CSS to Tailwind, and populates prototype-patterns.md for visual fidelity. Use at start of /implement for UI-first features.
shadcn-integration
Integration guide for shadcn/ui components with OKLCH design tokens. Use when setting up shadcn, customizing themes, or adding components to Next.js projects. Auto-trigger on /init --tokens --shadcn flag.
web-clone
URL-driven website cloning with visual + functional verification.
skill-premium-web-experience
Use for creating, redesigning, or transforming websites into premium, cinematic, conversion-focused web experiences with visual research, storytelling, scroll-driven interaction, responsive design, motion, performance, accessibility, and visual QA.
skill-frontend-ux-guardrails
Use as a frontend UX quality gate for responsive behavior, overflow, accessibility, interaction usability, touch targets, typography, layout stability, mobile behavior, focus states, reduced motion, and final visual validation.
skill-impeccable
Orquestra melhorias de frontend inspiradas no Impeccable a partir de pedidos conversacionais de design, UX, acessibilidade, responsividade, tipografia, layout, cor, motion, clareza, hardening e polish.