A design toolkit powering around 13,000 internal apps at one of the world’s biggest tech companies just went open source, and the machine-readable layer hiding inside it changes how AI agents write code

Every app you use has a design system behind it, a shared library of buttons, menus, text styles and layout rules that keeps the whole product looking like itself. Most users never think about them. Most developers treat them as a stack of polished components to copy from and move on. That assumption is about ... Read more