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Agent skill

Dart Flutter Patterns

by affaan-m in affaan-m/ECC

本番環境対応のDartおよびFlutterパターンは、null安全性、不変状態、非同期構成、ウィジェットアーキテクチャ、人気のある状態管理フレームワーク（BLoC、Riverpod、Provider）、GoRouterナビゲーション、Dioネットワーキング、Freezedコード生成、クリーンアーキテクチャをカバー。

MITAuto-check passedMobile

Install Dart Flutter Patterns

skills CLI
$ npx skills add affaan-m/ECC --skill dart-flutter-patterns -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install affaan-m/ECC dart-flutter-patterns --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .claude/skills && cp -r skills-src/docs/ja-JP/skills/dart-flutter-patterns .claude/skills/dart-flutter-patterns && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
dart-flutter-patterns
GitHub stars
276k
Token cost
~448 tokens
SKILL.md length
41 words
Files
1
Skills in repo
673
Repo updated
First seen
Licence
MIT

At a glance

本番環境対応のDartおよびFlutterパターンは、null安全性、不変状態、非同期構成、ウィジェットアーキテクチャ、人気のある状態管理フレームワーク（BLoC、Riverpod、Provider）、GoRouterナビゲーション、Dioネットワーキング、Freezedコード生成、クリーンアーキテクチャをカバー。

  • Works in 9 steps: Null安全性 — !を避ける、?./??/パターンマッチングを好む → 不変状態 — シール型、freezed、copyWith → 非同期構成 —… → …
  • Tasks that involve Cross-platform mobile apps
  • SKILL.md covers 使用時期, 動作方法 and 例
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Dart Flutter Patterns is an agent skill from affaan-m/ECC. 本番環境対応のDartおよびFlutterパターンは、null安全性、不変状態、非同期構成、ウィジェットアーキテクチャ、人気のある状態管理フレームワーク（BLoC、Riverpod、Provider）、GoRouterナビゲーション、Dioネットワーキング、Freezedコード生成、クリーンアーキテクチャをカバー。

Its SKILL.md is about 450 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Mobile, covering Cross-platform mobile apps. It works with Flutter and Dart. The repository describes itself as: The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond. The licence is MIT.

When your agent uses it

  • Tasks that involve Cross-platform mobile apps

Example prompts

  • “/dart-flutter-patterns”

Workflow steps

9 steps, taken from the first numbered list in SKILL.md.

  1. Null安全性 — !を避ける、?./??/パターンマッチングを好む
  2. 不変状態 — シール型、freezed、copyWith
  3. 非同期構成 — 並行Future.wait、await後の安全なBuildContext
  4. ウィジェットアーキテクチャ — クラスに抽出（メソッドではなく）、const伝播、スコープ付きリビルド
  5. 状態管理 — BLoC/Cubityベント、Riverpodノーティファイアおよび派生プロバイダー
  6. ナビゲーション — refreshListenable経由の反応型認証ガード付きGoRouter
  7. ネットワーキング — インターセプタ付きDio、ワンタイム再試行ガード付きトークンリフレッシュ
  8. エラーハンドリング — グローバルキャプチャ、ErrorWidget.builder、crashlyticsワイヤリング
  9. テスト — ユニット（BLoC test）、ウィジェット（ProviderScopeオーバーライド）、モック上のフェイク

What it can do on your machine

Read from SKILL.md and the folder at commit ef648e0. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are dart).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Dart Flutter Patterns loads about 448 tokens when it runs. Until then it costs about 45 tokens; SKILL.md has 41 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~45
When it runs · the whole SKILL.md, loaded when a task matches
~448

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from affaan-m/ECC at commit ef648e0, republished under its MIT licence (© affaan-m). 41 words, ~448 tokens.

Download SKILL.mdSave it as .claude/skills/dart-flutter-patterns/SKILL.md (or your agent's skills folder).
name
dart-flutter-patterns
description
本番環境対応のDartおよびFlutterパターンは、null安全性、不変状態、非同期構成、ウィジェットアーキテクチャ、人気のある状態管理フレームワーク（BLoC、Riverpod、Provider）、GoRouterナビゲーション、Dioネットワーキング、Freezedコード生成、クリーンアーキテクチャをカバー。
origin
ECC

Dart/Flutterパターン

使用時期

次の場合にこのスキルを使用：

  • 新しいFlutter機能を開始し、状態管理、ナビゲーション、またはデータアクセスのイディオマティックパターンが必要
  • Dartコードのレビューまたは作成とnull安全性、シール型、非同期構成のガイダンスが必要
  • 新しいFlutterプロジェクトをセットアップしBLoC、Riverpod、またはProviderのうち選択
  • 安全なHTTPクライアント、WebView統合、ローカルストレージを実装
  • FlutterウィジェットEt、Cubit、またはRiverpodプロバイダーのテストを作成
  • GoRouterを認証ガードでワイヤリング

動作方法

このスキルは、懸念事項で整理されたコピーペーストの準備ができたDart/Flutterコードパターンを提供：

  1. Null安全性 — !を避ける、?./??/パターンマッチングを好む
  2. 不変状態 — シール型、freezed、copyWith
  3. 非同期構成 — 並行Future.wait、await後の安全なBuildContext
  4. ウィジェットアーキテクチャ — クラスに抽出（メソッドではなく）、const伝播、スコープ付きリビルド
  5. 状態管理 — BLoC/Cubityベント、Riverpodノーティファイアおよび派生プロバイダー
  6. ナビゲーション — refreshListenable経由の反応型認証ガード付きGoRouter
  7. ネットワーキング — インターセプタ付きDio、ワンタイム再試行ガード付きトークンリフレッシュ
  8. エラーハンドリング — グローバルキャプチャ、ErrorWidget.builder、crashlyticsワイヤリング
  9. テスト — ユニット（BLoC test）、ウィジェット（ProviderScopeオーバーライド）、モック上のフェイク

例

dart
// シール状態 — 不可能な状態を防止
sealed class AsyncState<T> {}
final class Loading<T> extends AsyncState<T> {}
final class Success<T> extends AsyncState<T> { final T data; const Success(this.data); }
final class Failure<T> extends AsyncState<T> { final Object error; const Failure(this.error); }

// 反応型認証リダイレクト付きGoRouter
final router = GoRouter(
  refreshListenable: GoRouterRefreshStream(authCubit.stream),
  redirect: (context, state) {
    final authed = context.read<AuthCubit>().state is AuthAuthenticated;
    if (!authed && !state.matchedLocation.startsWith('/login')) return '/login';
    return null;
  },
  routes: [...],
);

詳細については、ドキュメントを参照してください。

© affaan-m, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in docs/ja-JP/skills/dart-flutter-patterns of affaan-m/ECC.

Open the folder on GitHubat commit ef648e0

Compare with similar skills

Dart Flutter Patterns next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Dart Flutter Patterns compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Dart Flutter Patterns this skillaffaan-m/ECC276k—~448Automated safety check: PassMIT
Engine Whats Newflutter/flutter179k—~978Automated safety check: PassBSD-3-Clause
Flutter Cherry Pickflutter/flutter179k—~1.8kAutomated safety check: PassBSD-3-Clause
Upgrade Browserflutter/flutter179k—~1.1kAutomated safety check: PassBSD-3-Clause
Bump Dartflutter/flutter179k—~1.2kAutomated safety check: PassBSD-3-Clause
Run Devicelab With Ledflutter/flutter179k—~786Automated safety check: PassBSD-3-Clause

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Works with

Categories

Questions about Dart Flutter Patterns

What does Dart Flutter Patterns do?

本番環境対応のDartおよびFlutterパターンは、null安全性、不変状態、非同期構成、ウィジェットアーキテクチャ、人気のある状態管理フレームワーク（BLoC、Riverpod、Provider）、GoRouterナビゲーション、Dioネットワーキング、Freezedコード生成、クリーンアーキテクチャをカバー。. Dart Flutter Patterns is an agent skill from affaan-m/ECC.

When should I use Dart Flutter Patterns?

Dart Flutter Patterns fits situations like: tasks that involve Cross-platform mobile apps.

How do I install Dart Flutter Patterns in Claude Code?

Run `npx skills add affaan-m/ECC --skill dart-flutter-patterns -a claude-code`. Or copy the skill folder (docs/ja-JP/skills/dart-flutter-patterns in affaan-m/ECC) into .claude/skills/dart-flutter-patterns in your project. Claude Code loads it when a task matches its description.

How do I install Dart Flutter Patterns in Codex?

Run `npx skills add affaan-m/ECC --skill dart-flutter-patterns -a codex`. Or copy the skill folder (docs/ja-JP/skills/dart-flutter-patterns in affaan-m/ECC) into .agents/skills/dart-flutter-patterns in your project. Codex loads it when a task matches its description.

Can I use Dart Flutter Patterns in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add affaan-m/ECC --skill dart-flutter-patterns -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/dart-flutter-patterns, .gemini/skills/dart-flutter-patterns, .github/skills/dart-flutter-patterns and .opencode/skills/dart-flutter-patterns in your project.

What does Dart Flutter Patterns need to run?

SKILL.md names no scripts, command-line tools or credentials: Dart Flutter Patterns is instructions for the agent only.

Does Dart Flutter Patterns access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Dart Flutter Patterns safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Dart Flutter Patterns use?

Dart Flutter Patterns is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Dart Flutter Patterns use?

About 448 tokens (SKILL.md is roughly 1.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Dart Flutter Patterns?

Skills that share tags, products or a category with Dart Flutter Patterns: Engine Whats New (flutter/flutter, 179k stars), Flutter Cherry Pick (flutter/flutter, 179k stars), Upgrade Browser (flutter/flutter, 179k stars) and Bump Dart (flutter/flutter, 179k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Dart Flutter Patterns?

affaan-m (a GitHub user) maintains it in affaan-m/ECC, which has 275,546 GitHub stars. The repository holds 673 skills in this directory. The repository was last updated on October 5, 2026.

Source: affaan-m/ECC on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.