3D drum picker — rows ride a perspective cylinder, flick to spin with momentum that lands on a detent, the centred row lit between accent rule lines. Drag, touch, wheel notches, tap-a-row and full keyboard (arrows, PageUp/Down, Home/End, type-ahead). Listbox or spinbutton semantics; TumblerGroup shares one band across drums for time and date pickers. Flat list under reduced motion.
pnpm dlx shadcn@latest add "https://crucibleui.com/r/tumbler.json"