If you're running conversion experiments on SaaS pricing pages or in-app upgrade prompts, this skill helps you design and iterate on paywalls, upsell modals, and upgrade screens. It's part of Corey Haines' marketing skills collection and runs in design-system mode, so it's meant for layout and visual optimization work rather than just copy tweaks. The upstream repo has the full workflow with assets and references. Honestly, the skill definition itself is light on specifics, but the trigger list makes it clear this is focused on the conversion moment when free users decide whether to pay. Worth grabbing if you're A/B testing pricing UI and want a structured starting point.
npx skills add https://github.com/nexu-io/open-design --skill paywall-upgrade-cro