How it fits

Good libraries, and Spotcheck isn't a replacement. Here's where each one fits.

shadcn/ui

What it does

App primitives and the registry model.

How Spotcheck fits

Follows the same install and API shape, so the two sit together in one app.

What it does

Chat parts for the AI SDK.

How Spotcheck fits

Adds the review side: grading, diffs, cost, traces and sign-off.

What it does

A chat runtime with primitives.

How Spotcheck fits

Has no runtime. It reads your stream and renders it.

What it does

Marketing effects and polished motion.

How Spotcheck fits

Puts the motion on working controls, with a still frame under reduced motion.