What does Elo and Simplification mean under dev type?

We all know what non functional means, but how about Elo and Simplification?


Yup! So I’m still figuring this out myself a little bit. My best understanding right now is that:

Simplifications are changes that remove lines, refactor, or otherwise simplify the code base.

Elo means that the change was specifically made to increase the engine’s strength.