This one loads three reference files with actual CRO principles, high-converting landing page patterns from companies like Stripe and Notion, and a systematic audit framework, then runs your page through all of them. You give it a URL or paste HTML, it catalogs every element (H1s, CTAs, forms, trust signals), flags what violates the 13 principles, compares against proven patterns, and spits out prioritized fixes with before/after examples. The output format is thorough, maybe even verbose, but that's the point. It checks for a FOUNDER_CONTEXT.md file to personalize recommendations if you've documented your business. Good for when you need specific rewrites and implementation steps, not just "make your CTA clearer" handwaving.
npx skills add https://github.com/ognjengt/founder-skills --skill cro-optimization