Cliff Click did a walkthrough of his solution on YouTube: https://youtu.be/NJNIbgV6j-Y?si=Wj97f-Imw5nfIzF7

https://news.ycombinator.com/item?id=39467885 but it looks like there have been improvements since.

Not that I know of. I just looked at the code and the commit history but a more in depth article would certainly be interesting.