react-native-brownfield-migration

name react-native-brownfield-migration description Implements an accepted incremental brownfield migration from native iOS or Android to React Native or Expo using @callstack/react-native-brownfield. Use after the brownfield path has been selected, when setting up the integration, packaging XCFramework or AAR artifacts, or adding React Native surfaces to native hosts. license MIT Migrating to React Native Use this skill only after the decision to adopt brownfield migration has been made. When the user is still choosing between brownfield, greenfield, a checkpoint-based path, defer, or no migration, use assess-react-native-migration first. Overview Prescriptive workflow for incremental adoption of React Native in existing native apps using @callstack/react-native-brownfield , from initial setup through phased host integration. Expo track Bare React Native track Use one track per task unless the user explicitly asks for migration or comparison. Migration Strategy Use this strategy for brownfield migration planning and execution: Assess app state and select Expo or bare path. Perform initial setup with @callstack/react-native-brownfield . Package RN artifacts ( XCFramework / AAR ) from the RN source app. Integrate one RN surface into the host app and validate startup/runtime. Repeat integration by feature/screen for incremental rollout. Agent Guardrails (Global) Apply these rules across all reference files: Select one path first (Expo or bare) and do not mix steps. Use placeholders from the docs ( <framework_target_name> , <android_module_name> , <registered_module_name> ) and resolve from project files. Validate each packaging command before moving to host integration. Prefer official docs for long platform snippets and CLI option details. Keep host apps isolated from direct React Native APIs when possible (facade approach). For startup/runtime verification, use agent-device to open the host app, navigate to the RN surface, capture snapshots/screenshots, and collect device evidence. If it is missing and verification needs it, install it through the environment's approved/trusted path or ask the user to install or enable it. Canonical Docs Quick Start Expo Integration iOS Integration Android Integration Brownfield CLI Guidelines Troubleshooting Path Selection Gate (Must Run First) Before selecting any reference file, classify the project: If no React Native app exists yet, use Expo creation path: expo-create-app.md -> expo-quick-start.md If React Native app exists, inspect package.json and app.json : Expo if expo is present or Expo plugin workflow is requested. Bare RN if native folders and direct RN CLI workflow are used without Expo path requirements. If still unclear, ask one disambiguation question. Continue with exactly one path. When to Apply Reference this package when: Implementing an accepted incremental migration from native-only apps to React Native or Expo Creating brownfield integration flows for Expo or bare React Native projects Performing initial setup with @callstack/react-native-brownfield Generating iOS XCFramework artifacts from a React Native app Generating and publishing Android AAR artifacts from a React Native app Integrating generated artifacts into host iOS/Android apps Quick Reference File Description quick-start.md Shared preflight and mandatory path-selection gate expo-create-app.md Scaffold a new Expo app before Expo brownfield setup expo-quick-start.md Expo plugin setup and packaging readiness expo-ios-integration.md Expo iOS packaging and host startup integration expo-android-integration.md Expo Android packaging, publish, and host integration bare-quick-start.md Bare React Native baseline setup bare-ios-xcframework-generation.md Bare iOS XCFramework generation bare-android-aar-generation.md Bare Android AAR generation and publish bare-ios-native-integration.md Bare iOS host integration bare-android-native-integration.md Bare Android host integration Problem -> Skill Mapping Problem Start With Need migration path decision first assess-react-native-migration Need Expo vs bare path decision quick-start.md Need to create a new Expo app for brownfield expo-create-app.md Need Expo brownfield setup and plugin wiring expo-quick-start.md Need Expo iOS brownfield integration expo-ios-integration.md Need Expo Android brownfield integration expo-android-integration.md Need bare RN baseline setup bare-quick-start.md Need bare RN iOS XCFramework generation bare-ios-xcframework-generation.md Need bare RN Android AAR generation/publish bare-android-aar-generation.md Need bare RN iOS host integration bare-ios-native-integration.md Need bare RN Android host integration bare-android-native-integration.md Related Skills Assess React Native migration before selecting the migration path.