If you're building artifacts that need to match Anthropic's visual identity, this pulls in the official brand colors and typography so you don't have to hunt through style guides or guess at hex values. It's positioned as a design system reference, meaning you get consistentpalettes and font specs to work with. The real value is as a template for setting up your own brand guidelines skill. You trigger it with phrases like "brand colors" or "visual identity" and it applies those standards to whatever you're generating. Straight from Anthropic's official skills repo, so the color codes and type choices are authoritative rather than approximated.
npx skills add https://github.com/nexu-io/open-design --skill brand-guidelines