Developer preview. Vela, Facet, and Quire are pre-release and in active development — syntax, APIs, and availability may change, and they are not yet generally available.
SStretch Dev Docs
Facet

Overview

What Facet is, and how it thinks about design systems.

Facet treats a design system as a compiler over a typed token graph. It is zero-runtime and framework-agnostic: you describe tokens once and author UI styles through three surfaces that all compile to static atoms.

Status: pre-release. A reference implementation is available, but Facet is still in M0 and is not yet a released production package.

Core ideas

  • Modes are first-class via resolver axes (theme, brand, density).
  • One-source token graph with aliases, derivations, and a11y constraints.
  • Cross-target emission to CSS, Tailwind, Style Dictionary, and React Native/Swift/Kotlin.
  • Headless behavior primitives with framework-specific adapters.

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