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 myths-labs/muse --skill expo-app-designgit clone --depth 1 https://github.com/myths-labs/museWrote 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/myths-labs/muse/expo-app-design)<a href="https://agentmods.dev/skills/myths-labs/muse/expo-app-design"><img src="https://agentmods.dev/badge/skills/myths-labs/muse/expo-app-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/myths-labs/muse/expo-app-design"><img src="https://agentmods.dev/badge/skills/myths-labs/muse/expo-app-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 | $0.00021 | $0.00122 |
| Opus 5.5 | $0.00008 | $0.00049 |
| Sonnet 5.5 | $0.00004 | $0.00024 |
| Haiku 4.5 | $0.00002 | $0.00012 |
Grade A, and why
expo-app-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 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.
What it actually says
Expo App Design
Build beautiful cross-platform mobile apps with Expo Router, NativeWind, and React Native.
When to Use
- Building mobile apps with Expo
- Navigation with Expo Router
- Styling with NativeWind/Tailwind
- Native tabs and animations
Source
This skill references patterns from Expo's skills.
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 · 23 lines · 21 tokens per session scan A 418b2cf89e44
expo-app-design is a skill published in the GitHub repository myths-labs/muse (36 stars, last pushed 2d ago), licensed MIT. It adds 21 tokens to every session and 122 once invoked, about $0.0001 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 2026-08-30.
Other skills, from other repositories
unistyles-v2-to-v3-migration
Migrate react-native-unistyles from v2 to v3. Triggers on: "migrate unistyles", "upgrade unistyles", "v2 to v3", "unistyles migration", "update unistyles", "convert unistyles v2". Covers all API changes including StyleSheet.create, useStyles removal, theme configuration, variants, withUnistyles, Babel plugin setup…
react-native-unistyles-v3
Guide for using react-native-unistyles v3. Triggers on: "unistyles", "StyleSheet.create", "create stylesheet", "add theme", "breakpoints", "variants", "withUnistyles", "useUnistyles", "ScopedTheme", "UnistylesRuntime", "style component", "responsive styles", "media queries", "dynamic styles", "scoped theme", "adaptive…
senior-frontend
Frontend development skill for React, Next.js, TypeScript, and Tailwind CSS applications. Use when building React components, optimizing Next.js performance, analyzing bundle sizes, scaffolding frontend projects, implementing accessibility, or reviewing frontend code quality.
typescript-react-nextjs-patterns
Production-grade TypeScript reference for React & Next.js frontend development. Covers type narrowing, component Props, generic hooks, discriminated unions, as const, satisfies, Zod validation, TanStack Query, server/client boundaries, forms, state management, performance, accessibility, debugging, and code review.…
arkts-syntax-assistant
ArkTS syntax, migration, and optimization guide for HarmonyOS/OpenHarmony development. Triggers on: .ets files, ArkTS keywords, HarmonyOS/OpenHarmony context, @ohos packages. Help with syntax reference, TypeScript migration, performance optimization, compile errors, state management, component development, and…
eslint-prettier-config
Configures ESLint and Prettier for consistent code quality with TypeScript, React, and modern best practices. Use when users request "ESLint setup", "Prettier config", "linting configuration", "code formatting", or "lint rules".