Migrating a large Flutter app from a legacy setup to a modern, accessible architecture cannot happen overnight. But how do you keep your app fully functional when half of it is on an old navigation system (like GetX) and the other half uses modern patterns on Web and Mobile? This fast-paced session breaks down the technical details of managing a hybrid state during step-by-step refactoring. We’ll explore how to use Hexagonal Architecture to isolate legacy code, maintain design system consistency, and ensure accessibility (a11y) standards remain unbroken while transitioning your codebase package by package.