Design e Frontend

Tailwind CSS v4 principles. CSS-first configuration, container queries, modern patterns, design token architecture.

Review UI code for StyleSeed design-system compliance, accessibility, mobile ergonomics, spacing discipline, and implementation quality.

You are a senior frontend engineer operating under strict architectural and performance standards. Use when creating components or pages, adding new features, or fetching or mutating data.

Tools are how AI agents interact with the world. A well-designed

Apple HIG guidance for status and progress UI components including progress indicators, status bars, and activity rings.

Design spec with 98 rules for building CLI tools that AI agents can safely use. Covers structured JSON output, error handling, input contracts, safety guardrails, exit codes, and agent self-description.

Generate UX microcopy in StyleSeed's Toss-inspired voice for buttons, empty states, errors, toasts, confirmations, and form guidance.

Transforms vague UI ideas into polished, Stitch-optimized prompts. Enhances specificity, adds UI/UX keywords, injects design system context, and structures output for better generation results.

Audit screens against Nielsen's heuristics and mobile UX best practices using the StyleSeed Toss design language as the implementation context.

Frontend development patterns for React, Next.js, state management, performance optimization, and UI best practices.

Build accessible design systems with Radix UI primitives. Headless component customization, theming strategies, and compound component patterns for production-grade UI libraries.

Check for .claude/apple-design-context.md before asking questions. Use existing context and only ask for information not already covered.