I know enough to parse the code, especially with the comments. It was a logical algorithm, it worked, and it was just for reformatting a page to print cleanly, so there was basically no risk if it didn't work. I code for work, I just don't know JavaScript syntax or functions.

Anyway, I was impressed it actually worked. I'm an AI skeptic, which is why I thought it was noteworthy to get well documented, clean, functional code from vibe coding—even in such a trivial context as swapping a head tag and removing script tags.