The idea and the algorithm are Aaronson's, and the lineage is Hagelbarger's and Shannon's. This page is a teaching version of their work, and it is not affiliated with any of them. Prior web implementations exist and are credited in reference 6.

Built by Spencer Stanton as plain HTML, CSS and JavaScript. No framework, no build step, no analytics, and nothing about you leaves your browser: your session is held in localStorage and nowhere else.

(Scott's name is mentioned at the bottom)

https://news.ycombinator.com/item?id=50074909

The top comment:

> This is a nice spin on the Aaronson oracle:

> In a class I taught at Berkeley, I did an experiment where I wrote a simple little program that would let people type either “f” or “d” and would predict which key they were going to push next

And today we have a web app of this that seems fully generated by Claude.