[upbeat_general]

Haven’t read the paper (or looked at the code), but not sure there’s a general obligation to cite anything that’s not a pre-print/published. If they knew of and used the code, that would be a different story, but otherwise it seems okay, if understandably frustrating for the person that wrote the code.

This is especially the case for something like this where it’s a relatively obvious idea and the evaluation matters more.

[keskival]

I'm not sure if there is obligation to cite anything. It's a question of ethics.

A claim of proposing a novel method should be corrected in a scientific publication if shown false. Otherwise the author is knowingly adding falsehoods into the body of scientific knowledge, and their institution is allowing it.