This one's been deprecated and rolled into the main impeccable skill, so if you're installing it now you're getting a redirect notice rather than functional code. The original idea was solid: enforce intentional design decisions by requiring context up front (audience, brand, use cases) and pushing you toward bold aesthetic directions instead of safe AI defaults. It covered typography scales, OKLCH color systems, spatial rhythm, and motion timing with specific anti-patterns to avoid. Now all that lives in /impeccable as the core design functionality, so you'd use that instead. If you've got the frontend-design folder sitting around, it's just a leftover you can delete.
npx skills add https://github.com/pbakaus/impeccable --skill frontend-design