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 PracticalSwan/agent-skills --skill react-native-skillsgit clone --depth 1 https://github.com/PracticalSwan/agent-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/practicalswan/agent-skills/react-native-skills)<a href="https://agentmods.dev/skills/practicalswan/agent-skills/react-native-skills"><img src="https://agentmods.dev/badge/skills/practicalswan/agent-skills/react-native-skills/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/practicalswan/agent-skills/react-native-skills"><img src="https://agentmods.dev/badge/skills/practicalswan/agent-skills/react-native-skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to high
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 →
- high Prompt Injection · line 118 Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
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 | $0.00055 | $0.01573 |
| Opus 5.5 | $0.00022 | $0.00629 |
| Sonnet 5.5 | $0.00011 | $0.00315 |
| Haiku 4.5 | $0.00006 | $0.00157 |
Grade A, and why
react-native-skills 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 — 166 lines — stays where its author put it; the contents beside it link to each section on GitHub.
React Native Skills
Comprehensive best practices for React Native and Expo applications. Contains rules across multiple categories covering performance, animations, UI patterns, and platform-specific optimizations.
When to Apply
Reference these guidelines when:
- Building React Native or Expo apps
- Optimizing list and scroll performance
- Implementing animations with Reanimated
- Working with images and media
- Configuring native modules or fonts
- Structuring monorepo projects with native dependencies
Rule Categories by Priority
| Priority | Category | Impact | Prefix |
|---|---|---|---|
| 1 | List Performance | CRITICAL | list-performance- |
| 2 | Animation | HIGH | animation- |
| 3 | Navigation | HIGH | navigation- |
| 4 | UI Patterns | HIGH | ui- |
| 5 | State Management | MEDIUM | react-state- |
| 6 | Rendering | MEDIUM | rendering- |
| 7 | Monorepo | MEDIUM | monorepo- |
| 8 | Configuration | LOW | fonts-, imports- |
Quick Reference
1. List Performance (CRITICAL)
list-performance-virtualize- Use FlashList for large listslist-performance-item-memo- Memoize list item componentslist-performance-callbacks- Stabilize callback referenceslist-performance-inline-objects- Avoid inline style objectslist-performance-function-references- Extract functions outside renderlist-performance-images- Optimize images in listslist-performance-item-expensive- Move expensive work outside itemslist-performance-item-types- Use item types for heterogeneous lists
2. Animation (HIGH)
animation-gpu-properties- Animate only transform and opacityanimation-derived-value- Use useDerivedValue for computed animationsanimation-gesture-detector-press- Use Gesture.Tap instead of Pressable
What ships with it
42 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.
- AGENTS.md 72 KB
- CHANGELOG.md 3.1 KB
- metadata.json 896 B
- README.md 4.9 KB
- rules/_sections.md 2.2 KB
- rules/_template.md 631 B
- rules/animation-derived-value.md 1.3 KB
- rules/animation-gesture-detector-press.md 2.5 KB
- rules/animation-gpu-properties.md 2.0 KB
- rules/design-system-compound-components.md 1.6 KB
- rules/fonts-config-plugin.md 1.4 KB
- rules/imports-design-system-folder.md 1.4 KB
- rules/js-hoist-intl.md 1.6 KB
- rules/list-performance-callbacks.md 1.0 KB
- rules/list-performance-function-references.md 4.0 KB
- rules/list-performance-images.md 1.4 KB
- rules/list-performance-inline-objects.md 2.3 KB
- rules/list-performance-item-expensive.md 2.4 KB
- rules/list-performance-item-memo.md 2.2 KB
- rules/list-performance-item-types.md 2.7 KB
- rules/list-performance-virtualize.md 1.7 KB
- rules/monorepo-native-deps-in-app.md 1.1 KB
- rules/monorepo-single-dependency-versions.md 1.3 KB
- rules/navigation-native-navigators.md 4.8 KB
- rules/react-compiler-destructure-functions.md 1.2 KB
- rules/react-compiler-reanimated-shared-values.md 1.2 KB
- rules/react-state-dispatcher.md 2.2 KB
- rules/react-state-fallback.md 1.7 KB
- rules/react-state-minimize.md 1.7 KB
- rules/rendering-no-falsy-and.md 1.8 KB
- rules/rendering-text-in-text-component.md 697 B
- rules/scroll-position-no-state.md 1.9 KB
- rules/state-ground-truth.md 2.1 KB
- rules/ui-expo-image.md 1.6 KB
- rules/ui-image-gallery.md 2.5 KB
- rules/ui-measure-views.md 2.2 KB
- rules/ui-menus.md 4.5 KB
- rules/ui-native-modals.md 1.8 KB
- rules/ui-pressable.md 1.5 KB
- rules/ui-safe-area-scroll.md 1.5 KB
- rules/ui-scrollview-content-inset.md 1.3 KB
- rules/ui-styling.md 2.2 KB
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 Changed 0d9f1a61eb61
- 1mo ago Changed d5e007d96b4c
- 1mo ago First seen · 166 lines · 55 tokens per session scan A 98a8511aea25
react-native-skills is a skill published in the GitHub repository PracticalSwan/agent-skills (21 stars, last pushed 5d ago), licensed MIT. It adds 55 tokens to every session and 1,573 once invoked, about $0.0002 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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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. Trigger on "flatlist is laggy", "expo or bare react native", "bridge to a native module", "set up ota updates". Do not use for web…
vercel-react-native-skills
React Native and Expo best practices for building performant mobile apps. Use when building React Native components, optimizing list performance, implementing animations, or working with native modules. Triggers on tasks involving React Native, Expo, mobile performance, or native platform APIs.
expo
Expert in Expo for React Native development. Covers Expo Router, EAS Build and Submit, development builds, native module integration, and production deployment. Knows how to build cross-platform mobile apps efficiently while maintaining access to native capabilities. Use when "expo, react native, mobile app, eas…
android_ui_verification
Automated end-to-end UI testing and verification on an Android Emulator using ADB.
android-dev
Production-grade Android app development guide covering native (Kotlin/Java), cross-platform (Flutter, RN, KMM), and hybrid architectures.