Astryx
GitHub
Meta open-sourced Astryx, a design system developed internally over eight years that powers 13,000+ apps, featuring 150+ React components with full customization and dark mode support. The system includes a CLI, comprehensive theming via CSS custom properties, and was deliberately designed so that both human developers and AI assistants can build with identical tooling and APIs. Teams can now adopt Astryx without vendor lock-in, overriding styles with their existing CSS approach and customizing components through theme configuration rather than forking source code.
Why it matters
Astryx is an open-source design system developed over eight years at Meta, powering over 13,000 applications with a library of 150+ accessible components and various themes designed for easy customization.
