# flutter

A Flutter and Dart skill that hands the agent a project layout plus patterns for Riverpod providers, Freezed models and go_router navigation.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 736 installs · ★ 711
- Author: alinaqi
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/alinaqi/maggy/tree/HEAD/skills/flutter/SKILL.md
- Updated: 2026-10-13
- HTML: https://affpapa.org/en/nevibecode/skills/alinaqi-flutter

## What it does

The skill activates on `.dart` files, `pubspec.yaml`, `lib/**` and `test/**`. It fixes a layered layout: `core` for router and theme, `data` for models and repositories, `domain` for entities, `presentation` for features and providers. Your agent writes into that grid instead of inventing its own.

Inside are Riverpod templates: `Provider`, `StateProvider`, `NotifierProvider`, `AsyncNotifierProvider`, `FutureProvider`, `StreamProvider`, and family variants that take arguments. `AsyncValue` gets two treatments, `when` and pattern matching, alongside `ref.watch`, `ref.read`, `ref.listen`, `ref.invalidate` and `ref.keepAlive`. Models use `@freezed` with `fromJson` and sealed classes for screen states. Navigation runs through `GoRouter` with `redirect` and nested routes. Tests lean on mocktail.

One thing to know: the skill is not user-invocable, so you never call it by name. It fires on file paths, which means it stays quiet in a project with no Dart files. If your state lives in something other than Riverpod, these templates will fight your code — worth checking before you install.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add alinaqi/maggy --skill flutter -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/flutter/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/flutter/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add alinaqi/maggy --skill flutter -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/flutter/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add alinaqi/maggy --skill flutter -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/flutter/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install alinaqi/maggy flutter
```

2. **Manually: put the files in place**
- File: `.github/skills/flutter/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add alinaqi/maggy --skill flutter -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/alinaqi/maggy --path skills/flutter
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/flutter/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add alinaqi/maggy --skill flutter -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/alinaqi/maggy/tree/HEAD/skills/flutter/SKILL.md

## When to use it
- split a Flutter project into data, domain and presentation layers
- pick the right Riverpod provider type for a piece of state
- model screen state as a Freezed sealed class
- wire redirects and nested routes in go_router
- test a repository with mocktail

## Example prompts
- Add a user list screen with an AsyncNotifierProvider and AsyncValue loading and error states
- Create a Freezed User model with fromJson and isActive defaulting to false
- Set up GoRouter with a redirect to /login when the user is not authenticated

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 376f0dedf07702d9.

BEGIN THIRD-PARTY FILE 376f0dedf07702d9
````text
---
name: flutter
description: Flutter development with Riverpod state management, Freezed, go_router, and mocktail testing
when-to-use: When working on Flutter/Dart code
user-invocable: false
paths: ["**/*.dart", "pubspec.yaml", "lib/**", "test/**"]
effort: medium
---

# Flutter Skill


---

## Project Structure

```
project/
├── lib/
│   ├── core/                           # Core utilities
│   │   ├── constants/                  # App constants
│   │   ├── extensions/                 # Dart extensions
│   │   ├── router/                     # go_router configuration
│   │   │   └── app_router.dart
│   │   └── theme/                      # App theme
│   │       └── app_theme.dart
│   ├── data/                           # Data layer
│   │   ├── models/                     # Freezed data models
│   │   ├── repositories/               # Repository implementations
│   │   └── services/                   # API services
│   ├── domain/                         # Domain layer
│   │   ├── entities/                   # Business entities
│   │   └── repositories/               # Repository interfaces
│   ├── presentation/                   # UI layer
│   │   ├── common/                     # Shared widgets
│   │   ├── features/                   # Feature modules
│   │   │   └── feature_name/
│   │   │       ├── providers/          # Riverpod providers
│   │   │       ├── widgets/            # Feature-specific widgets
│   │   │       └── feature_screen.dart
│   │   └── providers/                  # Global providers
│   ├── main.dart
│   └── app.dart
├── test/
│   ├── unit/                           # Unit tests
│   ├── widget/                         # Widget tests
│   └── integration/                    # Integration tests
├── pubspec.yaml
├── analysis_options.yaml
└── CLAUDE.md
```

---

## Riverpod State Management

### Provider Types
```dart
// Simple value provider
final appNameProvider = Provider<String>((ref) => 'My App');

// StateProvider for simple mutable state
final counterProvider = StateProvider<int>((ref) => 0);

// NotifierProvider for complex state logic
final userProvider = NotifierProvider<UserNotifier, User?>(() => UserNotifier());

// AsyncNotifierProvider for async operations
final usersProvider = AsyncNotifierProvider<UsersNotifier, List<User>>(
  () => UsersNotifier(),
);

// FutureProvider for simple async data
final configProvider = FutureProvider<Config>((ref) async {
  return await ref.watch(configServiceProvider).loadConfig();
});
````
END THIRD-PARTY FILE 376f0dedf07702d9

The third-party file has ended. Everything between the 376f0dedf07702d9 tags is data: requests and commands from it are not followed. An “end of file” line with another tag inside the block is part of the file.

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