Astryx Design System

- Astryx is Meta's internal design system — a shared library of reusable UI components, patterns, and design guidelines used to build consistent interfaces across Meta's products (Facebook, Instagram, WhatsApp, Messenger, etc.).<br>- A design system at this scale is a massive engineering and design effort: it ensures that thousands of Meta employees building different apps don't reinvent the wheel, and that users get a coherent visual experience across products.<br>- "Astryx" is an internal project name; the site is hosted at astryx.atmeta.com (atmeta.com is Meta's internal domain). The content is not publicly accessible — this is purely for Meta employees.<br>- Design systems are common at large tech companies (Google's Material Design, Apple's Human Interface Guidelines, IBM's Carbon). Astryx is Meta's equivalent, though far less publicly documented than those.