expo
Expo React Native performance optimization guidelines. This skill should be used when writing, reviewing, or refactoring Expo React Native code to ensure optimal performance patterns. Triggers on tasks involving React Native components, navigation, lists, images, animations, bundle optimization, or mobile performance improvements.
- Installs
- 555
- Last 24h
- —
- Trending rank
- —
- Security
- Not audited
Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/pproenca/dot-skills --skill expo- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads expo automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Community Expo React Native Best Practices
Comprehensive performance optimization guide for Expo React Native applications. Contains 54 rules across 9 categories, prioritized by impact to guide automated refactoring and code generation.
When to Apply
Reference these guidelines when:
- Writing new Expo React Native components
- Optimizing app startup and Time to Interactive
- Implementing lists, images, or animations
- Reducing bundle size and memory usage
- Reviewing code for mobile performance issues
Rule Categories by Priority
| Priority | Category | Impact | Prefix |
|---|---|---|---|
| 1 | Launch Time Optimization | CRITICAL | launch- |
| 2 | Bundle Size Optimization | CRITICAL | bundle- |
| 3 | List Virtualization | HIGH | list- |
| 4 | Image Optimization | HIGH | image- |
| 5 | Data Fetching Patterns | HIGH | data- |
| 6 | Navigation Performance | MEDIUM-HIGH | nav- |
| 7 | Re-render Prevention | MEDIUM | rerender- |
| 8 | Animation Performance | MEDIUM | anim- |
| 9 | Memory Management | LOW-MEDIUM | mem- |
Quick Reference
1. Launch Time Optimization (CRITICAL)
launch-splash-screen-control- Control splash screen visibility during asset loadinglaunch-preload-critical-assets- Preload fonts and images during splashlaunch-hermes-engine- Use Hermes engine for faster startuplaunch-defer-non-critical- Defer non-critical initializationlaunch-new-architecture- Enable New Architecture for synchronous native communicationlaunch-minimize-root-imports- Minimize imports in root App component
2. Bundle Size Optimization (CRITICAL)
bundle-avoid-barrel-files- Avoid barrel file importsbundle-analyze-size- Analyze bundle size before releasebundle-remove-unused-dependencies- Remove unused dependenciesbundle-split-by-architecture- Generate architecture-specific APKsbundle-enable-proguard- Enable ProGuard for Android release buildsbundle-optimize-fonts- Subset custom fonts to used charactersbundle-use-lightweight-alternatives- Use lightweight library alternatives
3. List Virtualization (HIGH)
list-use-flashlist- Use FlashList instead of FlatListlist-provide-estimated-size- Provide accurate estimatedItemSizelist-avoid-inline-functions- Avoid inline functions in renderItemlist-provide-getitemlayout- Provide getItemLayout for fixed-height itemslist-avoid-key-prop- Avoid key prop inside FlashList itemslist-batch-rendering- Configure list batch renderinglist-memoize-item-components- Memoize list item components
4. Image Optimization (HIGH)
image-use-expo-image- Use expo-image instead of React Native Imageimage-resize-to-display-size- Resize images to display sizeimage-use-webp-format- Use WebP format for smaller file sizesimage-use-placeholders- Use BlurHash or ThumbHash placeholdersimage-preload-critical- Preload critical above-the-fold imagesimage-lazy-load-offscreen- Lazy load off-screen images
5. Data Fetching Patterns (HIGH)
data-parallel-fetching- Fetch independent data in paralleldata-request-deduplication- Deduplicate concurrent requestsdata-abort-requests- Abort requests on component unmountdata-pagination- Implement efficient pagination strategiesdata-cache-strategies- Use appropriate caching strategiesdata-optimistic-updates- Apply optimistic updates for responsiveness
6. Navigation Performance (MEDIUM-HIGH)
nav-use-native-stack- Use native stack navigatornav-unmount-inactive-screens- Unmount inactive tab screensnav-prefetch-screen-data- Prefetch data before navigationnav-optimize-screen-options- Optimize screen optionsnav-avoid-deep-nesting- Avoid deeply nested navigators
7. Re-render Prevention (MEDIUM)
rerender-use-memo-components- Memoize expensive components with React.memorerender-use-callback- Stabilize callbacks with useCallbackrerender-use-memo-values- Memoize expensive computations with useMemorerender-avoid-context-overuse- Avoid overusing Context for frequent updatesrerender-split-component-state- Split components to isolate updating statererender-use-react-compiler- Enable React Compiler for automatic memoizationrerender-avoid-anonymous-components- Avoid anonymous components in JSX
8. Animation Performance (MEDIUM)
anim-use-reanimated- Use Reanimated for UI thread animationsanim-use-native-driver- Enable useNativeDriver for Animated APIanim-avoid-layout-animation- Prefer transform over layout animationsanim-gesture-handler-integration- Use Gesture Handler with Reanimatedanim-interaction-manager- Defer heavy work during animations
9. Memory Management (LOW-MEDIUM)
mem-cleanup-useeffect- Clean up subscriptions and timersmem-abort-fetch-requests- Abort fetch requests on unmountmem-avoid-closure-leaks- Avoid closure-based memory leaksmem-release-heavy-resources- Release heavy resources when not neededmem-profile-with-tools- Profile memory usage with development tools
How to Use
Read individual reference files for detailed explanations and code examples:
- Section definitions - Category structure and impact levels
- Rule template - Template for adding new rules
- Example rules: launch-splash-screen-control, list-use-flashlist
Full Compiled Document
For the complete guide with all rules expanded: AGENTS.md
FAQ
What does the expo skill do?
Expo React Native performance optimization guidelines. This skill should be used when writing, reviewing, or refactoring Expo React Native code to ensure optimal performance patterns. Triggers on tasks involving React Native components, navigation, lists, images, animations, bundle optimization, or mobile performance improvements.
How do I install expo?
Run npx skills add https://github.com/pproenca/dot-skills --skill expo in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/expo/ (personal) or .claude/skills/expo/ (project).
Which AI agents can use expo?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is expo safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains expo?
It is published by pproenca in pproenca/dot-skills. It has 555 recorded installs.
More from pproenca/dot-skills
zod
pproenca/dot-skills
Zod schema validation best practices for type safety, parsing, and error handling. This skill should be used when defining z.object schemas, using z.string validations, safeParse, or z.infer. This skill does NOT cover React Hook Form integration patterns (use react-hook-form skill) or OpenAPI client generation (use orval skill).
vitest
pproenca/dot-skills
Vitest testing framework patterns for test setup, async testing, mocking with vi., snapshots, and test performance (formerly test-vitest). This skill should be used when writing or debugging Vitest tests. This skill does NOT cover TDD methodology (use test-tdd skill), API mocking with MSW (use test-msw skill), or Jest-specific APIs.
react-hook-form
pproenca/dot-skills
React Hook Form performance optimization for client-side form validation using useForm, useWatch, useController, useFieldArray, the subscribe() API, and the Watch / FormStateSubscribe / FieldArray render-prop components. Covers RHF 7.82 additions including resetDefaultValues() and the disabled field-array option. This skill should be used when building client-side controlled forms with React Hook Form library. This skill does NOT cover React 19 Server Actions, useActionState, or server-side form handling (use react-19 skill for those).
emilkowal-animations
pproenca/dot-skills
Emil Kowalski's animation best practices for web interfaces. Use when writing, reviewing, or implementing animations in React, CSS, or Framer Motion. Triggers on tasks involving transitions, easing, gestures, toasts, drawers, or motion.
nuqs
pproenca/dot-skills
nuqs (type-safe URL query state) best practices for Next.js and other React frameworks. This skill should be used when writing, reviewing, or refactoring code that uses nuqs for URL state management. Triggers on tasks involving useQueryState, useQueryStates, search params, URL state, query parameters, nuqs parsers, limitUrlUpdates, Standard Schema, NuqsAdapter, or Next.js routing with state.
clean-architecture
pproenca/dot-skills
Clean Architecture principles and best practices from Robert C. Martin's book. This skill should be used when designing software systems, reviewing code structure, or refactoring applications to achieve better separation of concerns. Triggers on tasks involving layers, boundaries, dependency direction, entities, use cases, or system architecture.
Popular mobile skills
design-mobile-apps
designed-by-ai/skills
Design mobile app screens with Sleek, edit Sleek projects, and implement their designs in React Native or HTML.
ios-design
uizze.sh
Design and review iOS UI/UX for iPhone apps in SwiftUI, UIKit, or React Native. Use for mobile app design, screen redesigns, navigation flows, typography, forms, keyboard and safe-area layout, and accessibility checks. Apply Apple Human Interface Guidelines and consult real product references through the optional Uizze connection.
vercel-react-native-skills
vercel-labs/agent-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.
animate-expo
emilkowalski/skills
Build animations in React Native and Expo, making the decisions in the order that determines whether they feel right — should it animate, which thread it runs on, which properties, spring or timing, how the gesture hands off, how it degrades. Writes the implementation with Reanimated, Gesture Handler, Expo Router and expo-haptics. Use when animating anything in an Expo app, adding gestures, sheets, screen transitions, press feedback or haptics, or fixing motion that stutters on device. For web animation use animate.
xcode-project-setup
firebase/agent-skills
Safely modifies Xcode projects (.pbxproj) to add Swift Packages and link files. Use this skill whenever an iOS project needs dependencies installed (e.g. Firebase, Alamofire).
firebase-remote-config-basics
firebase/agent-skills
Manages Firebase Remote Config templates, feature flags, loading strategies, and SDKs (Android, iOS). Use when downloading/deploying remoteconfig JSON templates, managing version history/feature flags, setting in-app defaults, fetchAndActivate(), real-time listeners, or SDK setup. Don't use for Firebase Hosting, Auth, Firestore, Data Connect, Crashlytics, or App Hosting.