GlassKit UI is an open-source React component library for building web apps on the Meta Ray-Ban Display. It ships 44 components designed for the in-lens 600x600 display, a spatial D-pad focus engine (a focus ring moves to the nearest target and Enter activates), a history-aware Navigator for the system back gesture, and ComposeFlow, a picker-based text input. Two complete example apps, Workout and Messages, install onto the glasses by scanning a QR.

It's MIT. Components vendor into your repo shadcn-style, so you own the source and can customize anything, and the whole library re-themes from a small set of design tokens. There's also a CLI (npx @glasskit-ui/cli add ...), an MCP server, and an agent skill so AI coding tools build to the platform.

Live playground: https://glasskit.app/ui/playground source(MIT):https://github.com/GlassKitApp/glasskit-ui.

Feedback is welcome :)