frontend▌

Svelte 5 runes, snippets, and SvelteKit patterns for modern component development. \n \n Covers all Svelte 5 runes ($state, $derived, $effect, $props, $bindable, $inspect) with reactive state and computed value patterns \n Explains snippets syntax ({#snippet}, {@render}) as the replacement for slots and slot props \n Includes event handling migration from on: directives to onclick handlers and callback props, plus SvelteKit load functions and form actions \n Provides TypeScript typing for props,

Performance and architecture patterns for React Native + Expo apps. Rules ranked by impact — fix CRITICAL before touching MEDIUM.

This skill generates DESIGN.md files optimized for Google Stitch screen generation. It translates the battle-tested anti-slop frontend engineering directives into Stitch's native semantic design language — descriptive, natural-language rules paired with precise values that Stitch's AI agent can interpret to produce premium, non-generic interfaces.

Pixel-perfect HTML to PDF conversion with automatic RTL and Hebrew language support. \n \n Renders using Chrome headless engine with full CSS3/HTML5 support, including Flexbox, Grid, custom fonts, and JavaScript execution \n Automatic right-to-left direction detection for Hebrew, Arabic, and other RTL languages; includes --rtl flag for forced RTL mode \n Configurable page formats (A4, Letter, Legal, A3, A5), orientation, margins, scale, and optional headers/footers \n Requires one-time npm setup

This skill enforces rules for building production-quality PyQt6 desktop applications. The core principles are: strict MVC separation via signals/slots, never blocking the UI thread, centralized theming via QSS, and layout-manager-driven responsive design. These rules prevent the most common PyQt6 failures: frozen UIs, untestable coupling, and platform-specific rendering bugs.

Game UI design expertise grounded in Nintendo clarity, diegetic immersion, and esports readability principles. \n \n Covers HUD design, menu architecture, diegetic interfaces, and adaptive layouts across 4K displays, handheld screens, and input methods (controller, keyboard, touch) \n Emphasizes controller-first navigation, safe zones for TV viewing, and animation as communication rather than decoration \n Prioritizes accessibility as a core feature, not an afterthought, with guidance on readabi

React and Next.js performance optimization guide with 64 prioritized rules across 8 categories. \n \n Organized by impact level, from critical waterfalls and bundle optimization down to advanced patterns, each rule includes incorrect/correct code examples and explanations \n Covers eight domains: async patterns, bundle size, server-side caching, client-side data fetching, re-render optimization, rendering performance, JavaScript efficiency, and advanced patterns \n Designed for use during compon

Utility-first CSS framework for rapidly building custom interfaces with composed utility classes. \n \n Covers layout (flexbox, grid, positioning, sizing, spacing), transforms, typography, visual effects, and interactivity through organized utility categories \n Supports responsive design with mobile-first breakpoints, container queries, and conditional variants for state, pseudo-classes, and media queries \n Tailwind v4 introduces CSS-first configuration using theme variables and directives ( @

Utility-first CSS framework patterns for responsive, component-based styling with Tailwind v4.1+. \n \n Covers responsive design with mobile-first breakpoints, flexbox/grid layouts, spacing scales, typography, colors, and interactive states \n Includes CSS-first configuration via @theme directive, custom utilities, and container queries for modern styling workflows \n Provides 10+ component patterns (cards, navigation, forms, modals) with accessibility guidelines and dark mode support \n Support

Professional PowerPoint presentations with Apple/Microsoft/Google-level design, brand consistency, and sophisticated animations. \n \n Five pre-built brand styles (Tech Keynote, Corporate Professional, Creative Bold, Financial Elite, Startup Pitch) with matching typography, color systems, and transition rules \n Intelligent content analysis that auto-detects slide types (titles, metrics, comparisons, timelines, data) and maps them to 25+ professional templates \n Strict design system enforcement