Perf Web Optimization

Tailwind CSS performance optimization including v4 improvements. PROACTIVELY activate for: (1) Tailwind v4 Oxide engine performance, (2) Lightning CSS minification, (3) reducing CSS bundle size, (4) content config tuning to avoid scanning unused files, (5) safelist for dynamic classes (without bloating), (6) production builds with @apply minimization, (7) critical CSS extraction, (8) HTTP caching of generated CSS, (9) avoiding @apply overuse (utility-first preferred), (10) PurgeCSS / content-detection edge cases. Provides: performance tuning checklist, Oxide engine notes, content config patterns, safelist guidance, and critical-CSS workflow.

HarmonyOS ArkTS application development with ArkUI declarative UI framework. Use when building HarmonyOS/OpenHarmony apps, creating ArkUI components, implementing state management with decorators (@State, @Prop, @Link), migrating from TypeScript to ArkTS, or working with HarmonyOS-specific APIs (router, http, preferences). Covers component lifecycle, layout patterns, and ArkTS language constraints.

DaisyUI 5 component library best practices, patterns, and usage for Tailwind CSS 4. Use when building UI with daisyUI class names, creating daisyUI-based layouts, styling HTML with daisyUI components, creating React wrapper components for daisyUI, or any task involving daisyUI (.html, .jsx, .tsx, .vue, .svelte files). Triggers on: daisyUI components (btn, card, modal, drawer, navbar, etc.), daisyUI color names (primary, secondary, base-100, etc.), daisyUI config (@plugin "daisyui"), daisy-meta.ts, generate-daisy-safelist, compound components wrapping daisyUI, or any UI task in a project using daisyUI/Tailwind CSS 4.

Supanova Landing Page Design Engine. Generates premium, conversion-optimized landing pages using pure HTML + Tailwind CSS (CDN). Overrides default LLM biases toward generic templates. Enforces metric-based design rules, Korean typography standards, and hardware-accelerated motion for standalone HTML output.

Arco Design React UI component library reference (@arco-design/web-react). Use this skill whenever the user asks to build a page, create a UI, write frontend code, develop a web application, design a dashboard, or implement any React interface — especially when they mention Arco, arco-design, @arco-design/web-react, or any Arco component name (Button, Table, Form, Modal, Select, Menu, etc.). Covers all 70 components with full API, code examples, import patterns, theming, i18n, layout, forms, tables, modals, navigation, data entry, data display, feedback, responsive design, and best practices.

Intelligent network quality analysis with adaptive loading strategies. Detects connection type (2g/3g/4g), bandwidth, RTT, and save-data mode, then automatically triggers appropriate optimization workflows. Includes decision trees that recommend image compression for slow connections, critical CSS inlining for high RTT, and save-data optimizations (disable autoplay, reduce quality). Features connection-aware performance budgets (500KB for 2g, 1.5MB for 3g, 3MB for 4g+) and adaptive loading implementation guides. Cross-skill integration with Loading (TTFB impact), Media (responsive images), and Core Web Vitals (connection impact on LCP/INP). Use when the user asks about slow connections, mobile optimization, save-data support, or adaptive loading strategies. Compatible with Chrome DevTools MCP.