Produce an interactive single-file HTML design prototype using the REAL LobeHub design system (@lobehub/ui + antd + antd-style tokens) with production-style React — no build step, opens directly in a browser. Use…

Agent skill published as a SKILL.md in lobehub/lobehub (folder .agents/skills/design-prototype). Install it with one command using the open skills CLI, or copy the folder into ~/.claude/skills/.