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Found 62 Skills
Deep Core Web Vitals and page speed audit. Use when the user asks about page speed, Core Web Vitals, LCP, CLS, INP, FCP, TTFB, Lighthouse scores, why a page is slow, performance optimization, or resource size analysis. For broader technical SEO issues, see diagnose-seo.
Expert in Angular TypeScript development with scalable, high-performance patterns
Web platform design and accessibility guidelines. Use when building web interfaces, auditing accessibility, implementing responsive layouts, or reviewing web UI code. Triggers on tasks involving HTML, CSS, web components, WCAG compliance, responsive design, or web performance.
Expert Shopify theme development with Liquid, Online Store 2.0, and performance best practices
Optimizes images for web performance using modern formats, responsive techniques, and lazy loading strategies. Use when improving page load times, implementing responsive images, or preparing assets for production deployment.
[Frontend] Review UI code for web interface design compliance covering WCAG 2.2/3.0 accessibility, responsive design, performance, usability, and modern best practices. Use when asked to 'review my UI', 'check accessibility', 'audit design', 'review UX', 'check responsive design', or 'check my site against best practices'. Actions: review, check, audit, analyze, validate. Topics: accessibility, WCAG, ARIA, semantic HTML, focus states, forms, animation, typography, content handling, images, performance, Core Web Vitals, navigation, touch interaction, responsive design, mobile-first, dark mode, internationalization, hydration.
Run technical quality checks across accessibility, performance, theming, responsive design, and anti-patterns. Generates a scored report with P0-P3 severity ratings and actionable plan. Use when the user wants an accessibility check, performance audit, or technical quality review.
Expert in Astro framework with static generation and partial hydration patterns
Optimize images for web to reduce file size without sacrificing quality. Use compression, modern formats, and responsive techniques for faster loading.
Expert guidance on image optimization for web performance. Use when working with image formats (WebP, AVIF, JPEG, PNG, GIF, SVG, HEIC, JPEG XL), compression settings, responsive images, lazy loading, CDNs, Core Web Vitals, or any image-related web development task. Covers format selection, quality settings, srcset/sizes, picture element, art direction, fetchpriority, placeholder strategies (LQIP, blur-up, blurhash), container queries, HDR/wide color gamut, AI-powered image tools, edge/serverless processing, and performance optimization.
Web performance measurement and debugging toolkit. Use when the user asks about web performance, wants to audit a page, or says "analyze performance", "debug lcp", "check ttfb", "measure core web vitals", "audit images", or similar.
Pushes interfaces past conventional limits with technically ambitious implementations — shaders, spring physics, scroll-driven reveals, 60fps animations. Use when the user wants to wow, impress, go all-out, or make something that feels extraordinary.