flutter
Flutter framework for building beautiful, fast user experiences for mobile, web, and desktop from a single codebase. Use when building Flutter apps, working with widgets, state management, navigation, animations, or Material Design components.
What this skill does
# Flutter > The skill is based on Flutter framework, generated at 2026-01-31. Flutter is Google's SDK for crafting beautiful, fast user experiences for mobile, web, and desktop from a single codebase. Flutter works with existing code, is used by developers and organizations around the world, and is free and open source. Flutter uses Dart as its programming language and follows a widget-based architecture where everything is a widget. The framework provides hot reload for fast development cycles, a rich set of Material Design and Cupertino widgets, and excellent performance through compiled code. ## Core References | Topic | Description | Reference | |-------|-------------|-----------| | Widget System | StatelessWidget, StatefulWidget, Widget lifecycle, keys | [core-widgets](references/core-widgets.md) | | State Management | setState, StatefulWidget, ValueNotifier, ChangeNotifier | [core-state-management](references/core-state-management.md) | | Layout System | Row, Column, Stack, Flex, constraints, sizing | [core-layout](references/core-layout.md) | | BuildContext | Context usage, InheritedWidget, theme access | [core-build-context](references/core-build-context.md) | | InheritedWidget | Sharing data down widget tree, InheritedWidget patterns | [features-inherited-widget](references/features-inherited-widget.md) | ## Widgets ### Basic Widgets | Topic | Description | Reference | |-------|-------------|-----------| | Text & Styling | Text widget, TextStyle, RichText, TextSpan | [widgets-text](references/widgets-text.md) | | Images | Image widget, AssetImage, NetworkImage, ImageProvider | [widgets-images](references/widgets-images.md) | | Icons | Icon widget, IconData, IconTheme | [widgets-icons](references/widgets-icons.md) | | Buttons | ElevatedButton, TextButton, OutlinedButton, IconButton | [widgets-buttons](references/widgets-buttons.md) | | Input Fields | TextField, TextFormField, Form, FormField | [widgets-input](references/widgets-input.md) | | Async Widgets | FutureBuilder, StreamBuilder, async operations | [widgets-async](references/widgets-async.md) | | ValueListenableBuilder | Building widgets based on ValueListenable changes | [widgets-value-listenable](references/widgets-value-listenable.md) | | PageView | Swipeable pages, PageController, page navigation | [widgets-pageview](references/widgets-pageview.md) | | RefreshIndicator | Pull-to-refresh functionality | [widgets-refresh-indicator](references/widgets-refresh-indicator.md) | | Dismissible | Swipe-to-dismiss widgets | [widgets-dismissible](references/widgets-dismissible.md) | | TabBar & Tabs | Tab navigation, TabController, TabBarView | [widgets-tabs](references/widgets-tabs.md) | | Forms & Validation | Form validation, validators, form handling | [features-forms-validation](references/features-forms-validation.md) | ### Layout Widgets | Topic | Description | Reference | |-------|-------------|-----------| | Flex Layouts | Row, Column, Flex, Flexible, Expanded | [layout-flex](references/layout-flex.md) | | Stack Layout | Stack, Positioned, alignment | [layout-stack](references/layout-stack.md) | | Container | Container, BoxDecoration, padding, margin | [layout-container](references/layout-container.md) | | List Views | ListView, ListTile, GridView, Sliver widgets | [layout-lists](references/layout-lists.md) | | Slivers | CustomScrollView, SliverList, SliverGrid, advanced scrolling | [features-slivers](references/features-slivers.md) | | Scroll Controller | Programmatic scroll control, scroll listeners | [features-scroll-controller](references/features-scroll-controller.md) | ## Features ### Navigation | Topic | Description | Reference | |-------|-------------|-----------| | Navigator | Navigator.push, Navigator.pop, routes | [features-navigation](references/features-navigation.md) | | Named Routes | Route configuration, onGenerateRoute | [features-named-routes](references/features-named-routes.md) | | Router | GoRouter, declarative routing | [features-router](references/features-router.md) | ### Animations | Topic | Description | Reference | |-------|-------------|-----------| | Implicit Animations | AnimatedContainer, AnimatedOpacity, AnimatedSize | [features-implicit-animations](references/features-implicit-animations.md) | | Explicit Animations | AnimationController, Tween, AnimationBuilder | [features-explicit-animations](references/features-explicit-animations.md) | | Hero Animations | Hero widget, shared element transitions | [features-hero-animations](references/features-hero-animations.md) | ### Material Design | Topic | Description | Reference | |-------|-------------|-----------| | Material App | MaterialApp, Theme, ThemeData | [features-material-app](references/features-material-app.md) | | Material Components | AppBar, Scaffold, Drawer, BottomNavigationBar | [features-material-components](references/features-material-components.md) | | Material 3 | Material 3 design system, color schemes | [features-material-3](references/features-material-3.md) | ### Cupertino (iOS) | Topic | Description | Reference | |-------|-------------|-----------| | Cupertino Widgets | iOS-style widgets, CupertinoApp, CupertinoNavigationBar | [features-cupertino](references/features-cupertino.md) | ### UI Components | Topic | Description | Reference | |-------|-------------|-----------| | Dialogs & Modals | AlertDialog, showDialog, showModalBottomSheet | [features-dialogs](references/features-dialogs.md) | | Focus Management | FocusNode, FocusScope, keyboard navigation | [features-focus](references/features-focus.md) | ### Platform Integration | Topic | Description | Reference | |-------|-------------|-----------| | Platform Channels | MethodChannel, EventChannel, native communication | [features-platform-channels](references/features-platform-channels.md) | | Platform Views | AndroidView, UiKitView, embedding native views | [features-platform-views](references/features-platform-views.md) | | Assets & Resources | Asset management, pubspec.yaml, asset loading | [features-assets](references/features-assets.md) | | HTTP & Networking | HTTP requests, API calls, JSON parsing | [features-http](references/features-http.md) | | Responsive Design | MediaQuery, LayoutBuilder, screen adaptation | [features-responsive](references/features-responsive.md) | | Keys | ValueKey, ObjectKey, GlobalKey, when to use keys | [features-keys](references/features-keys.md) | | Widget Lifecycle | initState, dispose, lifecycle management | [features-lifecycle](references/features-lifecycle.md) | | Error Handling | Try-catch, error widgets, error boundaries | [features-error-handling](references/features-error-handling.md) | | PopScope | Handle back button and navigation pop events | [features-pop-scope](references/features-pop-scope.md) | ## Advanced | Topic | Description | Reference | |-------|-------------|-----------| | Custom Paint | CustomPainter, Canvas, custom graphics | [advanced-custom-paint](references/advanced-custom-paint.md) | | Gestures | GestureDetector, GestureRecognizer, drag and drop | [advanced-gestures](references/advanced-gestures.md) | | Performance | Performance optimization, const constructors, keys | [advanced-performance](references/advanced-performance.md) | | Testing | Widget testing, integration testing, test utilities | [advanced-testing](references/advanced-testing.md) | ## Best Practices | Topic | Description | Reference | |-------|-------------|-----------| | State Management | When to use setState, state lifting, patterns | [best-practices-state](references/best-practices-state.md) | | Performance | Optimization techniques, const usage, patterns | [best-practices-performance](references/best-practices-performance.md) |
Related in Design
contribute
IncludedLocal-only OSS contribution command center. Auto-refreshes the user's in-flight PR and issue state on invoke so conversations start with full context — no need to brief Claude on what's in flight. Helps the user find issues to contribute to on GitHub, builds per-repo dossiers of what each upstream expects (CLA, DCO, branch convention, AI policy, draft-first, review bots, issue templates), runs deterministic gates before any external action so AI-assisted contributions don't reach maintainers as slop. State is markdown-only: candidate files at ~/.contribute-system/candidates/, repo dossiers at ~/.contribute-system/research/, append-only event log at ~/.contribute-system/log.jsonl. No database, no cloud calls. Use when the user asks about their PRs / issues / contributions, wants to find new work to take on, claim an issue, build/refresh a repo's dossier, or draft a Design Issue or PR. Trigger with "/contribute", "what's my PR status", "find a contribution", "claim issue X", "draft a Design Issue for Y", "refresh dossier for Z".
architectural-analysis
IncludedUser-triggered deep architectural analysis of a codebase or scoped subtree across eight modes — information architecture, data flow, integration points, UI surfaces, interaction patterns, data model, control flow, and failure modes. This skill should be used when the user asks to "diagram this codebase," "map the architecture," "show the data flow," "give me an ERD," "trace control flow," "find the integration points," "verify the layout pattern," "audit the UX architecture," or any similar request whose primary deliverable is mermaid diagrams plus cited reports under docs/architecture/. Dispatches haiku/sonnet sub-agents in parallel for per-mode exploration, then verifies every citation mechanically before any node lands in a diagram. Not for one-off prose explanations of code (use code-explanation) or for high-level system design from scratch (use system-design).
mcp
IncludedModel Context Protocol (MCP) server development and tool management. Languages: Python, TypeScript. Capabilities: build MCP servers, integrate external APIs, discover/execute MCP tools, manage multi-server configs, design agent-centric tools. Actions: create, build, integrate, discover, execute, configure MCP servers/tools. Keywords: MCP, Model Context Protocol, MCP server, MCP tool, stdio transport, SSE transport, tool discovery, resource provider, prompt template, external API integration, Gemini CLI MCP, Claude MCP, agent tools, tool execution, server config. Use when: building MCP servers, integrating external APIs as MCP tools, discovering available MCP tools, executing MCP capabilities, configuring multi-server setups, designing tools for AI agents.
react-native-skia
IncludedDesign, build, debug, and optimise high-polish animated graphics in React Native or Expo using @shopify/react-native-skia, Reanimated, and Gesture Handler. Use when the user wants canvas-driven UI, shaders, paths, rich text, image filters, sprite fields, Skottie, video frames, snapshots, web CanvasKit setup, or performance tuning for custom motion-heavy elements such as loaders, hero art, cards, charts, progress indicators, particle systems, or gesture-driven surfaces. Also use when the user asks for fluid, glow, glass, blob, parallax, 60fps/120fps, or GPU-friendly animated effects in React Native, even if they do not explicitly say "Skia". Do not use for ordinary form/layout work with standard views.
plaid
IncludedProduct Led AI Development — guides founders from idea to launched product. Six capabilities: Idea (discover a product idea), Validate (pressure-test the idea against fatal flaws, problem reality, competition, and 2-week MVP feasibility), Plan (vision intake + document generation), Design (translate image references into a design.md spec), Launch (go-to-market strategy), and Build (roadmap execution). Use when someone says "PLAID", "plaid idea", "help me find an idea", "product idea", "idea from my business", "idea from my expertise", "plaid validate", "validate my idea", "pressure-test", "is this idea good", "find fatal flaws", "validate the problem", "plan a product", "define my vision", "generate a PRD", "product strategy", "plaid design", "design from image", "translate image to design", "create design.md", "extract design tokens", "plaid launch", "go-to-market", "launch plan", "GTM strategy", "launch playbook", "plaid build", "build the app", "start building", or "execute the roadmap".
nextjs-framer-motion-animations
IncludedAdds production-safe Motion for React or Framer Motion animations to Next.js apps, including reveal, hover and tap micro-interactions, whileInView, stagger, AnimatePresence, layout and layoutId transitions, reorder, scroll-linked UI, and lightweight route-content transitions. Use when the user asks to add, refactor, or debug Motion or Framer Motion in App Router or Pages Router codebases, especially around server/client boundaries, reduced motion, LazyMotion, bundle size, hydration, or route transitions. Avoid for GSAP-style timelines, WebGL or 3D scenes, heavy scroll storytelling, or CSS-only effects unless Motion is explicitly requested.