Cascivo is a React design system built the other way around: styling lives in native CSS, component state flows through signals, and everything is designed to be legible and composable for AI coding agents as much as for people.
The goal is a system where an agent (or a developer) can reason about a component from its markup and CSS alone — no hidden runtime styling layer, no framework-specific state ceremony — so UIs are fast to generate, easy to theme, and cheap to change.