The JS part is nowhere to be seen, I guess they used the assistant to create the layout, but not the actual DOOM integration part (?) Even then, that chat gets pretty painful to read after a while... Paraphrasing, but that's the gist of it: "center the text in the button", "you didn't center it, center the text", "please please center the text"...
The very beginning of the chat is already inefficient as it wastes a lot of "context space" to just get very basic stuff in like defining the text at the top.. that kind of stuff should go in the very first message