Flutter expert skill provides an AI agent with deep knowledge of mobile app architecture and state management using Dart and Flutter. It enforces clean architecture principles, feature-first folder organization, and proper layer separation alongside Riverpod and Bloc state management patterns. It guides the agent on dependency injection, functional error handling, Firebase integration, performance optimization, and testing practices. Reach for this skill when you need rigorous, idiomatic mobile code adhering to strict coding and architectural standards.