Expo SDK 55 in practice - Upgrading & Testing new Features

A hands-on walkthrough of Expo SDK 55, covering new features including React Native 0.83 and React 19.2 integration, Hermes V1 JavaScript engine with opt-in support, Hermes bytecode diffing for EAS updates (75% reduction in download size), the new Colors API for dynamic system colors, Apple Zoom shared element transitions, iOS Stack Toolbar, Expo UI native components, and the alpha release of Expo Widgets for iOS home screen widgets and live activities. Also covers the new package versioning convention (all Expo packages now start with 55), the move to a src/ folder in Expo Router, dropping legacy architecture support, and Expo MCP server improvements with agent skills for AI-assisted development.