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Master Flutter's constraint system to build responsive, overflow-free layouts efficiently. \n \n Core principle: constraints flow down, sizes flow up, parents set position. Never pass unbounded constraints in flex boxes or scrollable regions. \n Use Row / Column for linear layouts, Expanded / Flexible for space distribution, Stack for overlapping elements, and SizedBox for tight constraints. \n Apply LayoutBuilder for responsive sizing or conditional rendering for adaptive layouts across mobile,

$22

Tailwind CSS utilities for animations, transitions, and transforms with built-in patterns and custom animation support. \n \n Four built-in animations (spin, ping, pulse, bounce) plus extensive transition utilities covering properties, duration, timing functions, and delays \n Transform utilities for scale, rotate, translate, and skew with configurable origin points and GPU-accelerated performance \n Custom animations via @theme in Tailwind v4, including keyframe definitions and custom easing cu

Evaluate interfaces against proven UX principles. Based on Making UX Decisions by Tommy Geoco.

Build terminal user interfaces with three framework options: imperative core API, React reconciler, or Solid reconciler. \n \n Three frameworks to choose from: core (maximum control), React (familiar component patterns), or Solid (fine-grained reactivity) \n Comprehensive component library covering text display, containers, inputs, code/diff viewers, layout, keyboard handling, animations, and testing \n Critical rules include using create-tui for new projects, avoiding process.exit() , and nesti

Mobile-first CSS layouts using Flexbox, Grid, media queries, and responsive images across all devices. \n \n Covers mobile-first design progression from 320px through large screens (1440px+) with standard breakpoint definitions \n Implements Flexbox for 1-dimensional layouts and CSS Grid for 2-dimensional layouts, with practical examples for navigation, cards, and dashboards \n Includes responsive image techniques: srcset for resolution-aware loading, picture element for art direction, and CSS b

Implement purposeful, performant animations that enhance UX without overwhelming users. Focus on key moments: hero intros, hover feedback, content reveals, and navigation transitions.

Comprehensive performance optimization guide for Expo React Native applications. Contains 42 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation.

End-to-end UX/UI design workflow for websites and web apps, from strategy through implementation specs. \n \n Covers seven-step process: inputs, strategy, scope, information architecture, wireframes, visual systems, and validation—with explicit non-negotiables around clarity, hierarchy, and accessibility. \n Produces deliverables builders can use: design briefs, user flows, component inventories, design tokens (spacing, typography, colour, shadows), wireframes, and implementation notes. \n Inclu

Production-ready setup for Tailwind CSS v4 with shadcn/ui, dark mode, and CSS variable architecture. \n \n Four-step architecture: define CSS variables at root level with hsl() wrapper, map to Tailwind utilities via @theme inline , apply base styles, and enable automatic dark mode switching \n Vite plugin-based configuration (no PostCSS or tailwind.config.ts needed); requires @tailwindcss/vite and empty \"config\" in components.json \n Semantic color tokens for destructive, success, warning, and