Skill

role-mobile:flutter-expert

Expert guidance on Flutter 3.27+ (Impeller default on all platforms, Material 3, WASM web, DevTools, Flame), Dart 3.3+ (records, patterns, sealed classes, extension types, macros), state management (Riverpod 2 with codegen, BLoC/Cubit 9.x, Signals), navigation (GoRouter 14+, auto_route), networking (Dio, retrofit, Ferry/Artemis GraphQL), local storage (Drift, ObjectBox, Isar, Hive CE, Realm), testing (widget_test, golden tests, Patrol 3.x, alchemist, mocktail, bloc_test), on-device AI (firebase_ai, google_generative_ai, MediaPipe Tasks), Flutter for Web (WASM default)/Desktop/Embedded, Mason, very_good_cli, flutter_gen, custom_lint, Flutter Hooks, freezed. Use when building or optimizing Flutter apps.

Install

npx claudepluginhub rnavarych/alpha-engineer --plugin role-mobile

Tool Access

This skill is limited to using the following tools:

ReadGrepGlobBash

Preview

- Building or optimizing a Flutter application for mobile, web, or desktop

Supporting Assets

references/dart3-state-navigation.mdreferences/networking-storage-testing.mdreferences/platform-tooling-performance.md

SKILL.md

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Stats

Parent Repo Stars9

Parent Repo Forks0

Last CommitMar 5, 2026

Actions

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role-mobile:flutter-expert

When to use

Building or optimizing a Flutter application for mobile, web, or desktop

Choosing or migrating state management (Riverpod 2, BLoC, Signals)

Selecting a local database (Drift, ObjectBox, Isar, Hive CE, Realm)

Setting up navigation with GoRouter 14+ or auto_route

Writing widget tests, golden tests, or integration tests with Patrol 3.x

Using Dart 3.3+ features: records, patterns, sealed classes, extension types, macros

Targeting Flutter for Web (WASM), Desktop, or building a game with Flame

Integrating on-device AI with firebase_ai, google_generative_ai, or MediaPipe Tasks

Optimizing widget rebuilds, memory usage, and Impeller-based frame rendering

Core principles

Const everywhere — const constructors skip rebuilds; Flutter can only optimize what it knows is stable

BLoC/Cubit as the default state manager — most stable API in the ecosystem, unchanged for years; use setState + composition for simple cases; consider Riverpod only after understanding its framework-level weight

Sealed classes + pattern matching — exhaustive state modeling; prefer native Dart 3 sealed over freezed for simple unions

http for networking baseline, Dio only when needed — interceptors, cancellation, and FormData are real reasons; don't add Dio speculatively

Drift for structured data, SharedPreferences for primitives — Hive/Isar have known in-memory risks and no isolate support; use them with eyes open

Isolate heavy work — Isolate.run() for CPU-intensive tasks; never block the main isolate

Pigeon over raw MethodChannels — type-safe platform interop; eliminate stringly-typed method names

Extension types for domain safety — zero-cost wrappers: extension type UserId(String _) implements String {} prevents primitive obsession

WASM for Flutter Web — flutter build web --wasm is the production default; CanvasKit is legacy

Reference Files

references/dart3-state-navigation.md — widget composition best practices, Dart 3.3+ records/patterns/sealed classes/extension types/macros, Riverpod 2 with codegen, BLoC/Cubit 9.x, Signals, GoRouter 14+ with StatefulShellRoute, auto_route

references/networking-storage-testing.md — Dio interceptors and cancellation, retrofit code-gen, Ferry/Artemis GraphQL, Drift reactive ORM, ObjectBox, Isar, Hive CE, Realm, SharedPreferences, widget tests, golden tests, Patrol 3.x native automation, alchemist golden tests, Mocktail, bloc_test

references/platform-tooling-performance.md — Flutter Web WASM (default), Desktop (macOS/Windows/Linux), on-device AI (firebase_ai, google_generative_ai, MediaPipe Tasks), Flame game engine, Serverpod 2.x, Dart Frog, Mason bricks, very_good_cli, flutter_gen, custom_lint, Pigeon type-safe channels, FFI, Flutter Hooks, freezed, Impeller performance checklist