expo

Complete guide for building beautiful apps with Expo Router. Covers fundamentals, styling, components, navigation, animations, patterns, and native tabs.

Use when implementing or debugging ANY network request, API call, or data fetching. Covers fetch API, React Query, SWR, error handling, caching, offline support, and Expo Router data loaders (`useLoaderData`).

Guidelines for upgrading Expo SDK versions and fixing dependency issues

Build and distribute Expo development clients locally or via TestFlight

Deploying Expo apps to iOS App Store, Android Play Store, web hosting, and API routes

Set up Tailwind CSS v4 in Expo with react-native-css and NativeWind v5 for universal styling

Guidelines for creating API routes in Expo Router with EAS Hosting

Helps understand and write EAS workflow YAML files for Expo projects. Use this skill when the user asks about CI/CD or workflows in an Expo or EAS context, mentions .eas/workflows/, or wants help with EAS build pipelines or deployment automation.

Use Expo DOM components to run web code in a webview on native and as-is on web. Migrate web code to native incrementally.

Check the health of published EAS Updates: crash rates, install/launch counts, unique users, payload size, and the split between embedded and OTA users per channel. Use when the user asks how an update is performing, whether a rollout is healthy, how many users are on the embedded build vs OTA, or wants to gate CI on update health.

Guide for writing Expo native modules and views using the Expo Modules API (Swift, Kotlin, TypeScript). Covers module definition DSL, native views, shared objects, config plugins, lifecycle hooks, autolinking, and type system. Use when building or modifying native modules for Expo.

`@expo/ui/jetpack-compose` package lets you use Jetpack Compose Views and modifiers in your app.

`@expo/ui/swift-ui` package lets you use SwiftUI Views and modifiers in your app.