A documentation-style vertical navigation with collapsible sections, nested pages on a guide line, a sliding active pill and marker, a filter that highlights matches (press /), arrow-key movement, and a content pane with breadcrumbs and previous / next links. On phones it folds into a menu button that shows the current page.
pnpm dlx shadcn@latest add "https://reactframe.com/r/vertical-navigation.json"