From Brownfield Complexity to AI-Supported React Native Migration

Brownfield React Native migration is notoriously difficult due to ordering issues, packaging mismatches, and unclear contracts between native and RN code. Callstack has distilled field-tested experience into a structured workflow called react-native-brownfield-migration skills. The approach enforces a strict sequence: choose either Expo or bare React Native, complete prerequisites and packaging first, integrate runtime startup, render a known RN module, and validate in both Debug and Release builds. Supporting both Expo and bare RN tracks, the workflow helps enterprise teams evaluate React Native inside real host apps incrementally and reversibly, with clear pass/fail gates rather than high-risk big-bang migrations.