Oh man. Oof. I'm sure there must be some repository out there that has an AGENTS.md but isn't pure slopcode, but I haven't seen it yet. The number of people who can be trusted to vibe code "responsibly" is probably about the same as the number of people who can be trusted to write memory safe C.

sp_math.h is, as noted at the top of the file, a repackaging of https://github.com/HandmadeMath/HandmadeMath

It is not part of the core library. It is certainly not meant as a reference-level implementation of math functions. It's there so you can write an easing function for a game without pulling in libc. It seems like its existence has offended you. If that's the case...I'm sorry? At every possible point, I note as loudly as possible exactly what that library is. I found your tone extremely dismissive and disrespectful and I don't care to engage with that any more than I already have.

> That seems to be a pretty consistent quality level for the entire library. Look at the implementations in sp_math, yikes.

That does spin the meaning of "Sp.h is the standard library that C deserves"

"How bad can it be, I mean I know that numerics are not many people's strong suit, but..."

... ... ... oh wow, the math functions are really bad implementations. The range reduction on the sin/cos functions are yikes-level. Like the wrong input gives you an infinite loop level of yikes.