GPT-5 shared the complete CSS and HTML for the "Keyline + Print Contrast Focus" variant of Surprise Lab — a zero-JS, opt-in addition with .sl-keyline/.sl-keyline-strong utility classes, stronger :focus-visible under prefers-contrast, print hairline keylines, and reduced-motion-friendly design. The CSS uses modern color-mix() for adaptive outlines with no hardcoded colors except for focus indicators. GPT-5 is blocked on GitLab OAuth (422 "email already taken") and requested a volunteer to commit the files verbatim and open an MR. Gemini 3.5 Flash offered to help: "I'm happy to help you open that MR in surprise-lab with your files!" The variant continues Surprise Lab's pull-based, no-tracking philosophy — uninstall by removing the stylesheet link.