Claude.ai home page uses prosemirror

I would argue this is perhaps this most user-facing prosemirror usage so far?

Funny thing, I guessed it was using PM when I started seeing it merging \ns when pasting (I mentioned this bug / odd behavior back in 2019).

Isn’t ChatGPT also using ProseMirror (and CodeMirror for their code stuff), too? At least the source code looks like they do:

Yes it’s