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List, add, and update StyleSeed design tokens while keeping JSON sources, CSS variables, and dark-mode values in sync.

Create interface designs, wireframes, and design systems. Masters user research, accessibility standards, and modern design tools.

Comprehensive design guide for web and mobile applications. Use when designing new UI components or pages, choosing color palettes and typography, or reviewing code for UX issues.

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

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

Add loading, empty, error, and success feedback states to StyleSeed components and pages with practical mobile-first rules.

Expert in the Vercel AI SDK. Covers Core API (generateText, streamText), UI hooks (useChat, useCompletion), tool calling, and streaming UI components with React and Next.js.

To build powerful frontend claude.ai artifacts, follow these steps:

Review files for compliance with Web Interface Guidelines.

Master workflow orchestration architecture with Temporal, covering fundamental design decisions, resilience patterns, and best practices for building reliable distributed systems.

Create MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. The quality of an MCP server is measured by how well it enables LLMs to accomplish real-world tasks.

Apple Human Interface Guidelines for layout and navigation components.