react-native-expo
Build and maintain React Native apps with Expo SDK, EAS Build, EAS Update, and Continuous Native Generation. Use when configuring Expo projects, adding native modules, building binaries, or shipping over-the-air updates.
Works with
--- name: react-native-expo description: Build and maintain React Native apps with Expo SDK, EAS Build, EAS Update, and Continuous Native Generation. Use when configuring Expo projects, adding native modules, building binaries, or shipping over-the-air updates. license: MIT --- > The skill is based on Expo SDK (docs from expo/expo repo), generated at 2026-02-26. Expo provides tooling and services for React Native: app config and Prebuild (Continuous Native Generation), Expo SDK packages, development builds, EAS Build (cloud builds and internal distribution), and EAS Update (over-the-air JS updates). Use development builds for production apps; Expo Go is a limited playground. ## Core References | Topic | Description | Reference | |-------|-------------|-----------| | App config | app.json, app.config.js/ts, dynamic config, reading in app | [core-config](references/core-config.md) | | Development workflow | Dev loop, development builds vs Expo Go, when to rebuild | [core-development-workflow](references/core-development-workflow.md) | | Development and production modes | __DEV__, --no-dev --minify, when to use each | [core-development-mode](references/core-development-mode.md) | | Metro | metro.config.js, resolver, transformer, cache, env vars | [core-metro](references/core-metro.md) | | Logging | Console in terminal, native logs, log-android / log-ios | [core-logging](references/core-logging.md) | | CNG and Prebuild | npx expo prebuild, --clean, EAS Build and native dirs | [core-continuous-native-generation](references/core-continuous-native-generation.md) | ## Features ### Expo SDK and native code | Topic | Description | Reference | |-------|-------------|-----------| | Expo SDK and third-party libs | Install with npx expo install, compatibility, config plugins | [features-expo-modules](references/features-expo-modules.md) | | expo-constants | App manifest, build info, system constants, extra/env at runtime | [features-sdk-constants](references/features-sdk-constants.md) | | expo-image | Performant image component, caching, BlurHash/ThumbHash, contentFit | [features-sdk-image](references/features-sdk-image.md) | | expo-file-system | File and directory API, Paths.cache/document, read/write, download | [features-sdk-filesystem](references/features-sdk-filesystem.md) | | expo-secure-store | Encrypted key-value store, optional biometric auth | [features-sdk-secure-store](references/features-sdk-secure-store.md) | | Config plugins | Use and write plugins to modify AndroidManifest, Info.plist during prebuild | [features-config-plugins](references/features-config-plugins.md) | | Native modules | Expo Modules API, local module, config plugin for native config, lifecycle | [features-native-modules](references/features-native-modules.md) | ### EAS Build and Submit | Topic | Description | Reference | |-------|-------------|-----------| | EAS Build | Cloud builds, eas.json profiles, development/preview/production | [features-eas](references/features-eas.md) | | EAS Submit | Submit to Google Play and App Store (TestFlight), eas.json, CI | [features-eas-submit](references/features-eas-submit.md) | ### Development experience | Topic | Description | Reference | |-------|-------------|-----------| | iOS Simulator and Android emulator | Setup, npx expo start + i/a, limitations, troubleshooting | [features-simulators-emulators](references/features-simulators-emulators.md) | ### Updates and versioning | Topic | Description | Reference | |-------|-------------|-----------| | expo-updates and EAS Update | OTA updates, runtime version, channels | [features-updates](references/features-updates.md) | | Upgrading Expo SDK | Incremental upgrade, npx expo install --fix, expo-doctor | [features-versioning](references/features-versioning.md) | ## Best practices | Topic | Description | Reference | |-------|-------------|-----------| | Debugging | Dev vs production errors, native logs, reproducing crashes | [best-practices-debugging](references/best-practices-debugging.md) | | Common development errors | Metro, AppRegistry, SDK version, version mismatch, caches | [best-practices-common-errors](references/best-practices-common-errors.md) |
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