Skill UI

This skill provides a structured workflow to scan, audit, and fix web performance issues across Lighthouse and PageSpeed Insights pillars including Performance, Accessibility, Best Practices, and SEO. It helps improve Core Web Vitals like LCP, FCP, and CLS by identifying bottlenecks such as render-blocking resources and unused JavaScript. Users should provide reports or URLs for analysis.

A comprehensive guide for profiling, analyzing, and optimizing Python code. It addresses identifying performance bottlenecks related to CPU usage, excessive memory consumption, I/O operations, and slow data processing. Use this skill to improve application speed and efficiency in production environments.

A comprehensive reference guide detailing best practices, rules, and optimizations for building high-performance React Native and Expo applications. It covers critical areas such as list virtualization, complex animations, UI patterns, state management, and monorepo structure, helping developers avoid common pitfalls and maximize app speed and stability.

An open-source, advanced tool for professional post-production of screen recordings. It automatically speeds up idle segments, applies auto-zoom on click clusters, overlays keystroke chips, and renders smooth synthetic cursors. It specializes in generating high-quality, vertical (9:16) videos optimized for social media and public demos.

Optimize Apache Spark jobs with partitioning, caching, shuffle optimization, and memory tuning. Covers execution model, performance factors, and practical patterns for improving job speed and scalability.

Launch an RSVP speed reader that displays text one word at a time with Spritz-style ORP highlighting, turning supplied text or a prior response into a focused word-by-word reading view.

Generates Vitest tests in JavaScript/TypeScript with Vite-native speed. Covers Jest-compatible APIs, vi.mock mocking, spies, fake timers, snapshots, React component tests, in-source testing, and vitest.config setup.

Optimize website and web application performance including loading speed, Core Web Vitals (LCP, INP, CLS), bundle size reduction, caching strategies, and runtime performance. Use for debugging bottlenecks, implementing code splitting, image optimization, and preparing for performance audits.