You're getting a wrapper around Anthropic's official canvas design workflow that generates posters, illustrations, and static visual pieces as PNG or PDF files. The skill hooks into Claude's image generation mode and triggers on phrases like "create poster" or "visual art" (plus Chinese equivalents). What you see here is mostly the Open Design advertisement layer. The actual implementation lives upstream in Anthropic's skills repo, so you'll need to pull that bundle to get the real prompts, assets, and design philosophy they're applying. Useful if you want programmatic poster generation without writing your own aesthetic guidelines, though you're trusting their opinionated approach to layout and composition.
npx skills add https://github.com/nexu-io/open-design --skill canvas-design