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 curiositech/some_claude_skills --skill mobile-ux-optimizergit clone --depth 1 https://github.com/curiositech/some_claude_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/curiositech/some_claude_skills/mobile-ux-optimizer)<a href="https://agentmods.dev/skills/curiositech/some_claude_skills/mobile-ux-optimizer"><img src="https://agentmods.dev/badge/skills/curiositech/some_claude_skills/mobile-ux-optimizer/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/curiositech/some_claude_skills/mobile-ux-optimizer"><img src="https://agentmods.dev/badge/skills/curiositech/some_claude_skills/mobile-ux-optimizer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 401 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00076 | $0.02862 |
| Opus 5.5 | $0.00030 | $0.01145 |
| Sonnet 5.5 | $0.00015 | $0.00572 |
| Haiku 4.5 | $0.00008 | $0.00286 |
Grade A, and why
mobile-ux-optimizer 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 1mo 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 — 424 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Mobile-First UX Optimization
Build touch-optimized, performant mobile experiences with proper viewport handling and responsive patterns.
When to Use
✅ USE this skill for:
- Viewport issues (
100vhproblems, safe areas, notches) - Touch target sizing and spacing
- Mobile navigation patterns (bottom nav, drawers, hamburger menus)
- Swipe gestures and pull-to-refresh
- Responsive breakpoint strategies
- Mobile performance optimization
❌ DO NOT use for:
- Native app development → use
react-nativeorswift-executorskills - Desktop-only features → no skill needed, standard patterns apply
- General CSS/Tailwind questions → use Tailwind docs or
web-design-expert - PWA installation/service workers → use
pwa-expertskill
Core Principles
Mobile-First Means Build Up, Not Down
/* ❌ ANTI-PATTERN: Desktop-first (scale down) */
.card { width: 400px; }
@media (max-width: 768px) { .card { width: 100%; } }
/* ✅ CORRECT: Mobile-first (scale up) */
.card { width: 100%; }
@media (min-width: 768px) { .card { width: 400px; } }
The 44px Rule
Apple's Human Interface Guidelines specify 44×44 points as minimum touch target. Google Material suggests 48×48dp.
// Touch-friendly button
<button className="min-h-[44px] min-w-[44px] px-4 py-3">
Tap me
</button>
// Touch-friendly link with adequate padding
<a href="/page" className="inline-block py-3 px-4">
Link text
</a>
Viewport Handling
The dvh Solution
Mobile browsers have dynamic toolbars. 100vh includes the URL bar, causing content to be cut off.
/* ❌ ANTI-PATTERN: Content hidden behind browser UI */
.full-screen { height: 100vh; }
/* ✅ CORRECT: Responds to browser chrome */
.full-screen { height: 100dvh; }
/* Fallback for older browsers */
.full-screen {
height: 100vh;
height: 100dvh;
}
Safe Area Insets (Notches & Home Indicators)
/* Handle iPhone notch and home indicator */
.bottom-nav {
padding-bottom: env(safe-area-inset-bottom, 0);
}
.header {
padding-top: env(safe-area-inset-top, 0);
}
/* Full safe area padding */
.safe-container {
padding: env(safe-area-inset-top)
env(safe-area-inset-right)
env(safe-area-inset-bottom)
env(safe-area-inset-left);
}
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.
- 1mo ago First seen · 424 lines · 76 tokens per session scan A cf6c969c7990
mobile-ux-optimizer is a skill published in the GitHub repository curiositech/some_claude_skills (254 stars, last pushed 2d ago), licensed MIT. It adds 76 tokens to every session and 2,862 once invoked, about $0.0003 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 2026-09-03.
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