Besides just four files containing ~10k lines of code?

It's mostly comments and tests. Seems like exactly what you'd want.

Two of those are test files. Nothing wrong with more tests, and they seem descriptive to me. And it's a very easily testable framework, unlike some of the others in the thread.

We can't read your mind buddy! But agreed, 10k lines of code in just a few files is a valid point of concern.