Very Good AI Flutter Plugin

A Claude Code plugin that accelerates Flutter & Dart development with best-practices skills from Very Good Ventures.

Developed with 💙 by Very Good Ventures 🦄

Overview

Very Good AI Flutter Plugin is a collection of contextual best-practices skills that Claude uses when helping you write Flutter and Dart code. Each skill provides opinionated, production-quality guidance covering architecture patterns, naming conventions, folder structures, code examples, testing strategies, and anti-patterns to avoid, so you get code that follows VGV standards out of the box.

Installation

From the Marketplace

Inside Claude Code:

/plugin marketplace add VeryGoodOpenSource/very_good_claude_marketplace
/plugin install very-good-ai-flutter-plugin@very_good_claude_marketplace

For more details, see the Very Good Claude Marketplace.

Skills

Skill	Description
Create Project	Scaffold new Dart/Flutter projects from Very Good CLI templates — flutter_app, dart_package, flutter_plugin, dart_cli, flame_game, and more
Accessibility	WCAG 2.1 AA compliance — semantics, screen reader support, touch targets, focus management, color contrast, text scaling, and motion sensitivity
Testing	Unit, widget, and golden testing — mocktail mocking, pumpApp helpers, test structure & naming, coverage patterns, and dart_test.yaml configuration
Navigation	GoRouter routing — @TypedGoRoute type-safe routes, deep linking, redirects, shell routes, and widget testing with MockGoRouter
Internationalization	i18n/l10n — ARB files, context.l10n patterns, pluralization, RTL/LTR support with directional widgets, and backend localization strategies
Material Theming	Material 3 theming — ColorScheme, TextTheme, component themes, spacing systems, and light/dark mode support
Bloc	State management with Bloc/Cubit — sealed events & states, BlocProvider/BlocBuilder widgets, event transformers, and testing with blocTest() & mocktail
Layered Architecture	VGV layered architecture — four-layer package structure (Data, Repository, Business Logic, Presentation), dependency rules, data flow, and bootstrap wiring
Security	Flutter-specific static security review — secrets management, flutter_secure_storage, certificate pinning, Random.secure(), formz validation, dependency vulnerability scanning with osv-scanner, and OWASP Mobile Top 10 guidance
License Compliance	Dependency license auditing — categorizes licenses (permissive, weak/strong copyleft, unknown), flags non-compliant or missing licenses, and produces a structured compliance report using Very Good CLI

Hooks

This plugin includes PostToolUse hooks that automatically run Dart analysis and formatting on .dart files after every Edit or Write tool call.

Hook	Behavior
Analyze	Runs dart analyze on the modified file; exits 2 on failure (blocking — Claude must fix issues before continuing)
Format	Runs dart format on the modified file; always exits 0 (non-blocking — formatting is applied silently)

Prerequisites

• Dart SDK — must be available on your PATH
• jq — used to parse the hook payload; hooks are skipped gracefully if jq is not installed

Usage

Skills activate automatically when Claude detects relevant context in your conversation. Simply ask Claude to help with a Flutter or Dart task, and the appropriate skill's guidance will be applied.

For example:

You: Create a new Bloc for user authentication with login and logout events.

Claude: (applies the Bloc skill — uses sealed classes for events and states, follows the Page/View separation pattern, generates blocTest() tests with mocktail mocks, and follows VGV naming conventions)

You can also invoke skills directly as slash commands:

/vgv-create-project
/vgv-accessibility
/vgv-bloc
/vgv-internationalization
/vgv-layered-architecture
/vgv-material-theming
/vgv-navigation
/vgv-static-security
/vgv-testing
/vgv-license-compliance

What Each Skill Provides

Every skill includes:

• Core Standards — recommended conventions (e.g., mocktail over mockito, sealed classes for Bloc events)
• Architecture patterns — folder structures and layered architecture guidance
• Code examples — ready-to-adapt snippets following best practices
• Testing strategies — unit, widget, and integration testing patterns
• Common workflows — step-by-step guides for tasks like "adding a new feature" or "adding a new route"
• Anti-patterns — what to avoid and why

MCP Integration

This plugin includes a .mcp.json configuration that connects Claude Code to the Very Good CLI's built-in MCP server. This gives Claude the ability to execute CLI commands directly, complementing the skills which provide architectural guidance and best practices.

Available MCP tools:

Tool	What it does
create	Scaffold projects from templates (flutter_app, dart_cli, dart_package, flutter_package, flutter_plugin, flame_game, docs_site)
tests	Run tests with coverage enforcement
packages_check_licenses	Audit dependency licenses against an allowed list
packages_get	Get dependencies for a single package or recursively across a monorepo

Prerequisites:

• Very Good CLI v1.0+ installed: dart pub global activate very_good_cli
• very_good must be on your PATH

How it works:

The .mcp.json file at the project root registers a very-good-cli MCP server using stdio transport. When Claude Code detects this configuration, it connects to the Very Good CLI MCP server and gains access to the tools above. The skills continue to provide knowledge and best practices while the MCP tools handle execution.