frontend▌

High-converting email templates with layout patterns, subject line formulas, and mobile-first design rules. \n \n Covers five email types: welcome sequences, promotional campaigns, product updates, transactional receipts, and newsletters with specific templates and timing for each \n Enforces 600px max width, single-column layouts, 14-16px body text, and 44-50px CTA buttons optimized for 60%+ mobile opens \n Includes subject line formulas (numbered benefits, questions, personalization) capped at

Caches configuration phase across builds (AGP 8.0+):

Create distinctive, production-grade static sites from text requirements alone. No mockups, no Figma — just describe what you want and get bold, memorable designs.

A comprehensive guide for creating animations that feel right, based on Emil Kowalski's "Animations on the Web" course.

Show loading indicator ONLY when there's no data to display.

Fundamental design principles for writing maintainable, testable Python code. \n \n Covers five core patterns: KISS (Keep It Simple), Single Responsibility Principle, Separation of Concerns, Composition Over Inheritance, and the Rule of Three \n Includes practical code examples contrasting anti-patterns with recommended approaches for each principle \n Provides layered architecture guidance (API, Service, Repository layers) with dependency injection patterns for testability \n Emphasizes explici

Transform and visualize interior spaces using each::sense. This skill takes photos of existing rooms and generates redesigned versions with different styles, furniture, colors, and layouts.

React Native and Expo best practices for performant mobile apps across list rendering, animations, navigation, and native modules. \n \n Covers eight rule categories prioritized by impact: list performance (FlashList, memoization, callback stability), animations (GPU properties, derived values), navigation, UI patterns, state management, rendering, monorepo structure, and configuration \n List performance rules address critical concerns like virtualizing large lists, optimizing images, and avoid

Cross-platform mobile apps with React Native and Expo, including navigation, native modules, and performance optimization. \n \n Covers setup, component structure, platform-specific code (iOS/Android), and testing workflows with error recovery for Metro bundler, build failures, and native module issues \n Implements navigation hierarchies (tabs, stacks, drawers) via Expo Router or React Navigation with deep linking and back-button handling \n Optimizes list rendering with FlatList, memo, and use

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.