Ink and switches latest prototype.

Potluck is a research prototype that demonstrates a workflow for gradually turning text documents into interactive software.

https://www.inkandswitch.com/potluck/

Just watched this talk from EmacsConf 2022, which describes how Hyperbole (an Emacs extension) implements roughly the same idea as Potluck: https://emacsconf.org/2022/talks/buttons/