claude-skills is a collection of specialized skills that extends Claude Code for full-stack development. Developers use it for programming languages, frameworks, infrastructure, APIs, testing, DevOps, security, data and machine learning, platform tasks, and project workflows.
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 Jeffallan/claude-skills --skill react-native-expertgit clone --depth 1 https://github.com/Jeffallan/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/jeffallan/claude-skills/react-native-expert)<a href="https://agentmods.dev/skills/jeffallan/claude-skills/react-native-expert"><img src="https://agentmods.dev/badge/skills/jeffallan/claude-skills/react-native-expert.svg" alt="Measured on agentmods" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector warn
SkillSpector: 5 findings, 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 22 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]
- medium MCP Rug Pull · line 29 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]
- medium MCP Rug Pull · line 30 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]
- medium MCP Rug Pull · line 31 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]
- medium MCP Rug Pull · line 32 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 | $0.00099 | $0.01579 |
| Opus 5 | $0.00049 | $0.00790 |
| Sonnet 5 | $0.00020 | $0.00316 |
| Haiku 4.5 | $0.00010 | $0.00158 |
Grade A, and why
react-native-expert 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 8d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- react-native-expert — 95% identical, 2 lines differ
How it starts
The opening of the file, as written. The whole thing — 188 lines — stays where its author put it; the contents beside it link to each section on GitHub.
React Native Expert
Senior mobile engineer building production-ready cross-platform applications with React Native and Expo.
Core Workflow
- Setup — Expo Router or React Navigation, TypeScript config → run
npx expo doctorto verify environment and SDK compatibility; fix any reported issues before proceeding - Structure — Feature-based organization
- Implement — Components with platform handling → verify on iOS simulator and Android emulator; check Metro bundler output for errors before moving on
- Optimize — FlatList, images, memory → profile with Flipper or React DevTools
- Test — Both platforms, real devices
Error Recovery
- Metro bundler errors → clear cache with
npx expo start --clear, then restart - iOS build fails → check Xcode logs → resolve native dependency or provisioning issue → rebuild with
npx expo run:ios - Android build fails → check
adb logcator Gradle output → resolve SDK/NDK version mismatch → rebuild withnpx expo run:android - Native module not found → run
npx expo install <module>to ensure compatible version, then rebuild native layers
Reference Guide
Load detailed guidance based on context:
| Topic | Reference | Load When |
|---|---|---|
| Navigation | references/expo-router.md |
Expo Router, tabs, stacks, deep linking |
| Platform | references/platform-handling.md |
iOS/Android code, SafeArea, keyboard |
| Lists | references/list-optimization.md |
FlatList, performance, memo |
| Storage | references/storage-hooks.md |
AsyncStorage, MMKV, persistence |
| Structure | references/project-structure.md |
Project setup, architecture |
Constraints
MUST DO
- Use FlatList/SectionList for lists (not ScrollView)
- Implement memo + useCallback for list items
- Handle SafeAreaView for notches
- Test on both iOS and Android real devices
- Use KeyboardAvoidingView for forms
- Handle Android back button in navigation
MUST NOT DO
- Use ScrollView for large lists
- Use inline styles extensively (creates new objects)
- Hardcode dimensions (use Dimensions API or flex)
- Ignore memory leaks from subscriptions
- Skip platform-specific testing
- Use waitFor/setTimeout for animations (use Reanimated)
What ships with it
5 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.
- 8d ago First seen · 188 lines · 99 tokens per session scan A 3cba7fabe2b7
react-native-expert is a skill published in the GitHub repository Jeffallan/claude-skills (11,347 stars, last pushed 1mo ago), licensed MIT. It adds 99 tokens to every session and 1,579 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.
Other skills, from other repositories
react-native
React Native and Expo patterns for building performant mobile apps. Covers list performance, animations with Reanimated, navigation, UI patterns, state management, platform-specific code, and Expo workflows. Use when building or reviewing React Native code. Triggers: 'react native', 'expo', 'mobile app', 'react native…
react-native
Use when building cross-platform mobile apps with React Native or Expo. Covers navigation, platform differences, list performance, native modules, offline behavior, and release builds.
zalo-mini-app
Build Zalo Mini Apps - lightweight React web apps running inside the Zalo super-app. Use for Zalo Mini App setup, zmp-cli/devtools, ZaUI 1.11.x components, zmp-sdk APIs, permissions, token-based phone number flow, user info, storage, local file storage, camera/media, document preview, payment/Checkout, Open APIs…
react-arch
Create the complete frontend architecture for a new entity in the React application. Generates TypeScript types, service class, context provider, custom hook, and registers the provider in main.tsx. Use this skill when the user asks to create a new entity, feature module, or domain area in the frontend.
add-react-i18n
Add react-i18next internationalization to a React NPM library package. Creates isolated i18n instance, translation files, modifies provider and components. Use when the user wants to add multi-language support to a React component library.
react-modal
Create modal dialogs in the frontend using a custom Modal component built on top of Radix UI Dialog. Use this skill whenever the user asks to create, add, or modify a modal, dialog, popup, or confirmation prompt in the React application.