What problem does it solve? Expo Go cannot run custom native code, local Expo modules, Apple targets, or third-party native libraries, so developers need a way to build and install custom development clients on physical devices for real testing. ## Core Features & Use Cases - EAS Development Profiles: Configure eas.json with developmentClient, autoIncrement, and remote app version settings for consistent builds. - Cloud and Local Builds: Build iOS and Android dev clients via EAS Build in the cloud or locally with Xcode and Android toolchains. - TestFlight Distribution: Build and submit iOS dev clients to TestFlight in one command for internal team testing. - Use Case: Your app adds a config plugin and push notifications that Expo Go cannot run. Use this Skill to create a development build, install it on your device, and connect it to your local Metro bundler. ## Quick Start Use the expo-dev-client skill to configure a development profile in eas.json and build an iOS development client for my device.