> afaik minad didn't use LLMs to write it.

Oh, I stand corrected. I was confused, I thought Divya did it experimentally first, for the Emacs Reader. Turns out minad really was the one who had the original prototype, and Divya wanted to use it in the Reader, then multi-people effort to make it work on Android, Mac and finally making it into the master branch. And yes, no LLMs - at least nobody publicly mentions any use of them.