Not really what people/mathematicians would generally understand as "algebraic number theory". More like computational number theory or computational algebra.
It's really nice to make a chapter on elliptic curves, it's one of my domains of research (ECC).
I have codes for CRT and Pell's equation as well, maybe I will upload them.
https://en.wikipedia.org/wiki/Adele_ring
(Took me a few minutes just to get that - reminder, bring diving gear when venturing into math waters ;-)
But what did you expect when you clicked on a github link?