solid-glass

Solid Glass is a dark, smoky-glass theme for shadcn/ui plus a set of components built for AI chat and agent screens: a composer, tool steps, a diff view, a reasoning panel, a context ring, and an ask card for when the agent needs your decision. It is one stylesheet that restyles the shadcn/ui components you already have. MIT licensed, no paid tier, free.

Setup is two commands on an existing shadcn/ui project: npx shadcn@latest add deeplethe/solid-glass/solid-glass, then import the CSS after Tailwind and delete the colour variables shadcn init wrote. It targets React 19, Tailwind CSS 4 and the Base UI flavour of shadcn/ui, so an older Radix-based app is not plug and play. Nothing to host. The docs site has a Create page where you turn dials for thickness, tint, radius and blur and copy out the CSS. Solo, small teams and larger teams: free. Compare it with Vercel's AI Elements or assistant-ui if you want chat components without the opinionated look.

The catch: it's about a week old, has no tagged releases, and nearly every commit comes from one maintainer at a five-month-old org. Pin the install to a commit and expect the look to keep shifting.