Dart Expert

This is a comprehensive reference for Dart language features and Flutter development, covering everything from null safety and async patterns to widget composition and state management with Provider. The code examples are practical and production-ready, showing real patterns like StreamControllers, named routes, and proper error handling. What stands out is the depth on fundamentals like mixins, extensions, and Futures before diving into Flutter specifics. Use this when you need quick reminders on Dart idioms or Flutter architecture patterns without digging through documentation. The state management section focuses on Provider, so if you're using Riverpod or Bloc exclusively, you'll need to adapt those patterns yourself.

skills.sh installs: 462
GitHub stars: 44
last updated: Aug 21, 2026

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Install

$ npx -y skills add personamanagmentlayer/pcl --skill dart-expert --agent claude-code

Installs into .claude/skills of the current project.

Files

Dart & Flutter Expert

Expert guidance for Dart programming, Flutter framework, mobile development, and cross-platform applications.

Core Concepts

Dart Language

Strong typing with type inference
Async/await and Futures
Streams
Mixins and extensions
Null safety
Collections

Flutter Framework

Widgets (Stateless & Stateful)
State management (Provider, Riverpod, Bloc)
Navigation and routing
Material and Cupertino design
Responsive layouts
Platform integration

Dart Fundamentals

// Variables and types
var name = 'John';  // Type inference
String explicitType = 'Explicit';
final constantValue = 42;  // Runtime constant
const compileConstant = 'Compile-time';

// Null safety
String? nullableString;
String nonNullable = 'Never null';

// Late initialization
late String lateInit;

// Collections
List<String> names = ['Alice', 'Bob', 'Charlie'];
Map<String, int> ages = {'Alice': 25, 'Bob': 30};
Set<int> uniqueNumbers = {1, 2, 3, 3};  // {1, 2, 3}

// Functions
int add(int a, int b) => a + b;

// Named parameters
void createUser({
  required String name,
  int age = 18,
  String? email,
}) {
  print('Creating user: $name, age: $age');
}

SKILL.md on GitHub