This sets up a complete typographic system based on modular scales and mathematical ratios like 1.25 or 1.333, giving you a proper hierarchy from 12px captions up to 64px display text. You get size, weight, line height, and letter spacing all mapped out with specific recommendations for each level. It covers font pairing rules, responsive adjustments for mobile, and the basics like keeping body text at 16px minimum and line lengths between 45-75 characters. Honestly, this is the kind of foundational work most teams skip or botch, so having it systematized saves you from arbitrary pixel pushing and ensures your text actually looks coherent across the product.
npx skills add https://github.com/owl-listener/designer-skills --skill typography-scale