Performance optimization for React Native. Use when optimizing lists, preventing re-renders, memoizing components, or debugging performance issues in Expo/React Native apps.
Complex multi-step operations in React Native. Use when implementing flows with multiple async steps, state machine patterns, or debugging flow ordering issues.
Styling patterns for React Native with NativeWind and BrandColors. Use when working with styles, themes, colors, responsive layouts, or platform-specific UI in Expo/React Native.
Testing patterns for React Native with Jest and React Native Testing Library. Use when writing tests, mocking Expo modules, testing Zustand stores, or debugging test failures.
Zustand state management patterns for React Native. Use when working with Zustand stores, debugging state timing issues, or implementing async actions in Zustand.
Detects seven structural anti-patterns in Claude Projects that cause unpredictable output, ignored instructions, and degraded quality.
Build 3D and WebXR (AR/VR) experiences in the browser with SceneView for Web — Filament.js (WebGL2/WASM) wrapped in a Kotlin/JS DSL and a plain-JavaScript API on…
Machine learning in Python with scikit-learn. Use when working with supervised learning (classification, regression), unsupervised learning (clustering, dimensionality reduction),…
Best practices for scikit-learn machine learning, model development, evaluation, and deployment in Python
Classical ML in Python: classification, regression, clustering, dim reduction, evaluation, tuning, preprocessing pipelines.
Full Sentry SDK setup for Android. Use when asked to "add Sentry to Android", "install sentry-android", "setup Sentry in Android", or configure error monitoring, tracing,…
Run end-to-end agent simulations, review traces, and watch production regressions when reliability work spans pre-release testing and live monitoring.
Guia completo de integração Supabase com Flutter. Use este skill sempre que o usuário mencionar supabase_flutter, integrar Supabase num app Flutter, autenticação com Supabase no…
Swift 6 fundamentals for all Apple platforms. Use when implementing concurrency, architecture, testing, i18n, or performance optimization across iOS, macOS, iPadOS, watchOS,…
Comprehensive Swift development for building, testing, and deploying iOS/macOS applications. Use when Claude needs to: (1) Build Swift packages or Xcode projects from command…
Builds iOS/macOS/watchOS/tvOS applications, implements SwiftUI views and state management, designs protocol-oriented architectures, handles async/await concurrency, imple — from…
Expert in the Swift ecosystem, specializing in iOS/macOS/visionOS development, Swift 6 concurrency, and deep system integration.
Comprehensive guide to UI/UX design principles, architectural patterns, and animation techniques for building high-quality iOS apps with Swift.
Apply modern Swift language patterns and idioms for non-concurrency, non-SwiftUI code. Covers if/switch expressions (Swift 5.9+), typed throws (Swift 6+), result builders,…
Comprehensive macOS app development with Swift 6.2, SwiftUI, SwiftData, Swift Concurrency, Foundation Models, Swift Testing, ScreenCaptureKit, and app distribution.
Review Swift/iOS code: SwiftUI, Combine, UIKit, App Store guidelines and iOS architecture
Swift coding rules from ai-toolkit: coding-style, frameworks, patterns, security, testing. Triggers: .swift, Package.swift, .xcodeproj, SwiftUI, Combine, async/await, XCTest.
Swift/SwiftUI strictness, clean code, and security rules. Use when writing, reviewing, or refactoring Swift code in iOS/macOS projects.
Guide SwiftUI app-structure decisions for Apple apps across `App`, scenes, commands, focus, environment, preferences, window and document coordination, and reusable view…
Reviews SwiftUI code for view composition, state management, performance, and accessibility. Use when reviewing .swift files containing SwiftUI views, property wrappers (@State,…
SwiftUI data flow expert with @Observable, SwiftData, NavigationStack, and structured concurrency. Activate on: SwiftUI state management, @Observable, SwiftData, NavigationStack,…
Diagnose SwiftUI performance issues including unnecessary re-renders, view identity problems, and slow body evaluations.
Expert SwiftUI development guidelines with MVVM architecture and modern Swift best practices
Write, review, or improve SwiftUI code following best practices for state management, view composition, performance, and iOS 26+ Liquid Glass adoption.
Write, review, or improve SwiftUI code following best practices for state management, view composition, performance, modern APIs, Swift concurrency, and iOS 26+ Liquid Gl — from…
Audit and improve SwiftUI runtime performance from code review and architecture. Use for requests to diagnose slow rendering, janky scrolling, high CPU/memory usage, excessive…
Modern SwiftUI toolbar patterns including customizable toolbars, search integration, transition effects, and platform-specific behavior.
Refactor and review SwiftUI view files for consistent structure, dependency injection, and Observation usage.
Produces litigation-ready financial memoranda from multi-year tax returns, covering income trends, filing status changes, deduction patterns, red flags, and trustee…
Audit technical debt in Flutter / Dart projects - analyze code against checklist and generate prioritized report
Invoke when the user needs a technical SEO audit, Core Web Vitals optimization, crawlability analysis, site architecture review, indexation management, JavaScript rendering…
When the user wants to write end-to-end tests for React Native apps using Detox's gray-box testing approach.
Expert guidance for Flutter, Google's UI toolkit for building natively compiled applications for mobile, web, and desktop from a single Dart codebase.
Expert guidance for Ionic, the open-source framework for building cross-platform mobile, desktop, and progressive web apps using web technologies (HTML, CSS,…
When the user wants to write mobile UI tests using Maestro's simple YAML-based flow definitions. Also use when the user mentions 'maestro,' 'mobile UI testing,' 'YAML mobile…
Run a repeatable docs-site check that builds locally, opens the site across device sizes, and reports layout, accessibility, and interaction issues.
Tests authentication and authorization mechanisms in mobile application APIs to identify broken authentication,
Execute mobile app testing on iOS and Android devices/simulators. Use when performing specialized testing.
Modern SwiftUI toolbar patterns including customizable toolbars, search integration, transition effects, and platform-specific behavior.
Produce a complete mobile app architecture design — platform choice, navigation structure, state management, data layer, key screens.
Produce a mobile feature spec — user story, technical approach, component breakdown, platform-specific considerations, edge cases.
Mobile reconnaissance — understand the app's tech stack, architecture, dependencies, and health for takeover.
Use when asked about mobile UI guidelines, touch targets, platform-specific UI rules, or mobile interaction patterns.
Index a repository into a code knowledge graph, expose it through MCP, and give agents architecture-aware context before they answer or edit.
Promote notebook work into rerunnable Python artifacts or lightweight apps when an analysis needs to be shared, versioned, and rerun reliably.
Use node-ical when an agent is handed a raw .ics file or subscription URL and needs normalized event objects, recurrence-aware dates, and timezone-safe fields it can reason over.
Use pgBadger when an agent needs to convert raw PostgreSQL logs into readable evidence about slow queries, errors, and workload hotspots after an incident.
Look up NSAttributedString.Key values, value types, and view-compatibility rules — typography, color, decoration, paragraph style, attachments, links, AppKit-only keys.
Write, review, or improve UIKit code following best practices for view controller lifecycle, Auto Layout, collection views, navigation, animation, memory management, and modern…
Scaffolds a Unity game project with folder structure, assembly definitions, new Input System, scriptable object architecture, scene management, Git LFS, and CI/CD via GameCI.
Use when working with VIPER architecture in iOS/UIKit apps. Triggers on: creating new VIPER modules (View/Interactor/Presenter/Entity/Router); fixing retain cycles between VIPER…
Reviews watchOS code for app lifecycle, complications (ClockKit/WidgetKit), WatchConnectivity, and performance constraints.
WebdriverIO is a next-generation browser and mobile automation test framework for Node.js. It supports WebDriver, WebDriver BiDi, and Appium protocols with built-in test runner,…
WebKit integration in SwiftUI using WebView and WebPage for embedding web content, navigation, JavaScript interop, and customization.
Use when testing Windows 11 desktop apps (WinForms/WPF/UWP) via UFO UIA/Win32 automation MCP. Triggers on "test this Windows app", "QA the app", "run smoke test", "click the…