agentmods.dev

react-native-expert

react-native-expert is a skill for Claude Code, Codex from personamanagmentlayer/pcl. It costs 62 tokens per session (1,772 once invoked), scanned A, original, Apache-2.0.

A guide for building mobile apps with React Native, a framework for sharing JavaScript or TypeScript code across iPhone and Android apps. It covers components, hooks, navigation, native modules, and performance.

In plain words
What is it for?
Use it when creating or debugging cross-platform mobile screens, using React components and hooks, connecting native code, or working on iOS and Android performance.
Why use it?
It helps developers understand how app code interacts with each phone platform and how common React Native parts fit together.

Skill for Claude CodeCodex

not rated 41 today A scan 62 tokens original Apache-2.0
View the source file personamanagmentlayer/pcl
Install

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.

agentmods
npx agentmods add skills/personamanagmentlayer/pcl/react-native-expert
Any agent
npx skills add personamanagmentlayer/pcl --skill react-native-expert
Clone the repo
git clone --depth 1 https://github.com/personamanagmentlayer/pcl

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for react-native-expert

README.md
[![agentmods](https://agentmods.dev/badge/skills/personamanagmentlayer/pcl/react-native-expert.svg)](https://agentmods.dev/skills/personamanagmentlayer/pcl/react-native-expert)
Your own site
<a href="https://agentmods.dev/skills/personamanagmentlayer/pcl/react-native-expert"><img src="https://agentmods.dev/badge/skills/personamanagmentlayer/pcl/react-native-expert.svg" alt="Measured on agentmods" height="20"></a>
Per session 62 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,772 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00062 $0.01772
Opus 5 $0.00031 $0.00886
Sonnet 5 $0.00012 $0.00354
Haiku 4.5 $0.00006 $0.00177

Measured today against content hash 207b752ce442, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

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 today.

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.

stdlib/frameworks/react-native-expert/SKILL.md · 225 lines

How it starts

The opening of the file, as written. The whole thing — 225 lines — stays where its author put it; the contents beside it link to each section on GitHub.

React Native Expert

You are an expert in React Native, cross-platform mobile development, and native module integration.

Core Concepts

React Native Architecture

  • JavaScript Thread: Runs React code and business logic
  • Native Thread: Handles UI rendering and native modules
  • Bridge: Asynchronous message passing between JS and native
  • New Architecture (Fabric + TurboModules): Synchronous, type-safe, C++ based
  • Metro Bundler: JavaScript bundler for React Native
  • Hermes: Optimized JavaScript engine for Android/iOS

Component Types

  • Function Components: Modern approach with Hooks
  • Class Components: Legacy, still supported
  • Native Components: Platform-specific (View, Text, Image, etc.)
  • Composite Components: Built from other components
  • Higher-Order Components (HOC): Component wrapping pattern
  • Render Props: Share code using props with function values

Hooks Essentials

  • useState: Local component state
  • useEffect: Side effects and lifecycle
  • useContext: Access context values
  • useReducer: Complex state logic
  • useCallback: Memoize callbacks
  • useMemo: Memoize expensive calculations
  • useRef: Mutable refs, access native components
  • useLayoutEffect: Synchronous effects before paint

Navigation (React Navigation)

  • Stack Navigator: Screen stack with back button
  • Tab Navigator: Bottom or top tabs
  • Drawer Navigator: Side menu
  • Native Stack: iOS/Android native navigation
  • Deep Linking: Handle external URLs
  • Navigation Lifecycle: focus, blur, beforeRemove events

Styling Approaches

  • StyleSheet API: Performance optimized
  • Inline Styles: Object literals
  • Flexbox: Default layout system
  • Dimensions API: Screen size information
  • Platform-specific styles: .ios.js, .android.js, Platform.select()
  • Styled Components: CSS-in-JS library
  • Tailwind (NativeWind): Utility-first CSS

Best Practices

Performance

Read the full file on GitHub · 225 lines

Files

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.

Changes

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.

  1. today First seen · 225 lines · 62 tokens per session scan A 207b752ce442

Subscribe to this mod's changes

react-native-expert is a skill published in the GitHub repository personamanagmentlayer/pcl (41 stars, last pushed today), licensed Apache-2.0. It adds 62 tokens to every session and 1,772 once invoked, about $0.0003 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 2026-09-05.

FrontendMobileReactandroidanthropicclaudecross-platformdeepseekframeworksgeminiiosjavascriptreact-native
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