Ask HN: What's the prototyping workflow at your company?

I’ve been reading that a lot of companies are pushing PMs to get into code to prototype using replit/cursor/etc. I’m curious whether the folks doing this create one-off prototypes that then get discarded when it gets to dev, or if there’s some attempt to hand the prototype off to dev or an ai tool for refinement before it goes out (or if your PMs actually push features?). Or maybe I’m missing another workflow entirely. I’d be interested to hear what people are doing.