flutter-architecture

Current (2026) Flutter app architecture from the Flutter team's official guide, Very Good Ventures and LeanCode - UI layer (View + ViewModel/Cubit/Notifier) and data layer (Repository + Service), feature folders, dependency injection, Result/Command patterns, networking and JSON models, go_router, monorepos with pub workspaces, day-one project setup, scaling teams, legacy refactoring. Use this whenever creating a new Flutter project or feature, deciding folder structure, adding a repository/API/service layer, choosing packages, reviewing Flutter code for maintainability, or scaling a Flutter team - even if the user only asks "where should this file go".