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Provides expertise in building modern Windows desktop applications using WinUI 3, WPF, and Windows App SDK. Specializes in XAML-based UI development, MVVM architecture, native Windows integration, and modern packaging with MSIX.

Create platform-compliant app store screenshots and preview videos for iOS and Android. \n \n Generates screenshots at exact Apple App Store (iOS) and Google Play (Android) dimensions with device mockups, captions, and lifestyle contexts \n Covers critical gallery ordering strategy: first 3 screenshots drive 80% of impressions and must communicate core value, differentiation, and top features \n Includes preview video structure (15–30s for iOS, 30s–2min for Android) with hook, feature demonstrat

This comprehensive skill provides complete ASO capabilities for successfully launching and optimizing mobile applications on the Apple App Store and Google Play Store.

Setup and usage of next-intl with prefix-based locale routing (e.g. /en/about, /ja/about). Use this skill in any Next.js App Router project.

Build Telegram Mini Apps with TON blockchain integration, native authentication, and monetization. \n \n Covers Telegram Web App API setup, user authentication via Telegram, and Mini App architecture patterns for mobile-first design \n Includes TON Connect wallet integration for Web3 Mini Apps, transaction handling, and TON blockchain interactions \n Supports multiple monetization models: Telegram Stars, TON payments, in-app purchases, referrals, and NFT sales \n Provides viral mechanics pattern

Use this skill for WinUI 3 and Windows App SDK work that needs grounded setup guidance, app bootstrap, modern Windows UX decisions, or concrete implementation patterns.

Create robust cross-platform mobile applications using React Native with modern development patterns including navigation, state management, API integration, and native module handling.

Measure and optimize Flutter app bundle, APK, or IPA size with platform-specific analysis and reduction strategies. \n \n Supports Android (APK/AppBundle), iOS (IPA), and desktop platforms (Linux, macOS, Windows) with platform-specific measurement workflows \n Generates code size analysis JSON files via flutter build --analyze-size and integrates with Dart DevTools App Size Tool for component breakdown visualization \n Implements size reduction through debug info splitting, asset compression, an

Interactive UIs for MCP tools that run inside Claude Desktop and other MCP-enabled hosts. \n \n Combines an MCP tool (called by the LLM) with an HTML resource (renders the UI) linked via _meta.ui.resourceUri \n Supports React with useApp hook, vanilla JS, Vue, Svelte, Preact, and Solid; clone the SDK repo to access working templates and API reference for each framework \n Requires CSP configuration in resource contents for all network requests, including localhost; handlers must be registered be

Comprehensive testing strategies for iOS and Android mobile apps across unit, UI, integration, and performance layers. \n \n Covers unit testing with Jest, component testing with React Testing Library, and UI automation using Detox, Appium, XCTest, and Espresso \n Includes performance testing, regression testing, and integration testing with backend services \n Provides best practices for test isolation, mocking, meaningful naming, and >80% code coverage targets \n Emphasizes testing on real dev