Meta open-sources Astryx, a React and StyleX design system with 90+ components, ten themes, and agent-ready MCP tooling.
Meta released Astryx this week. It is an open-source design system, currently in Beta. The project grew inside Meta’s monorepo over eight years. Astryx is built on React and StyleX. StyleX is Meta’s compile-time CSS engine.
TL;DR
Astryx is Meta’s open-source, agent-ready React design system, now in Beta.
It pairs StyleX styling with a CSS-variable theme cascade and ten themes.
A CLI and MCP server lets AI agents scaffold and document UIs.
Meta open-sources Astryx, a customizable, agent-ready React design system with 150+ accessible components, seven themes, and a CLI
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