Solid foundation for keeping CSS organized at scale. Covers BEM, SMACSS, CSS-in-JS, utility-first patterns, and CSS custom properties with practical examples for each. The naming convention guides are especially useful if you're onboarding developers or trying to standardize across teams. Most valuable when you're dealing with component libraries or design systems where consistency actually matters. The BEM examples show the classic block/element/modifier structure clearly, and the best practices section is refreshingly brief instead of lecturing you. If your stylesheets are turning into spaghetti or your team keeps arguing about class names, this gives you concrete patterns to point to.
npx skills add https://github.com/aj-geddes/useful-ai-prompts --skill css-architecture