Expo SDK 55 is released with React Native 0.83.2 and React 19.2 support. Key changes include the removal of Old Architecture support (New Architecture is now mandatory), the removal of expo-av in favor of expo-audio and expo-video, and an opt-in Hermes v1 compiler for performance gains. The post provides step-by-step upgrade advice: migrate to New Architecture on SDK 54 before upgrading to SDK 55, use development builds instead of Expo Go, leverage the Claude Code expo/skills plugin for automated upgrade assistance, and consult the changelog and troubleshooting guides for breaking changes.
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