From the "Accordion" component:

> Is it accessible? Yes. It adheres to the WAI-ARIA design patterns.

I've only checked the Tab component (as one of the more complex one from accessibility perspective), but the WAI-ARIA patterns are well implemented.

However, WAI-ARIA patterns are a necessary but not a sufficient condition. E.g., the Tab component has _detectable_ issues, i.e., run Lightroom in Chrome and you will find some problems (like contrast ratio issues). Finally, a manual test is necessary, which will show things like the insufficient focus ring in the "New York" style.

I've updated my post, where I compare different UI libraries on a subset of accessibility criteria, to include shadcn: https://darekkay.com/blog/accessible-ui-frameworks/