Creates YouTube thumbnails optimized for mobile viewing and click-through rates using AI image generation. Includes the crucial 120px mobile visibility test, safe zone mapping to avoid YouTube's UI overlays, and psychology-based face expression guidelines. Generates thumbnails at proper 1280x720 specs with high-contrast color schemes and readable text sizing. The before/after split compositions and A/B testing prompts are solid for content creators who need to iterate quickly. Covers the technical stuff most designers miss like timestamp overlay zones and mobile-first design principles that actually impact CTR.
npx skills add https://github.com/inferen-sh/skills --skill youtube-thumbnail-design