Are Scripts Detectable?

Okay, so most cheats/hacks are ran using a .exe or .dll format. These files attach themselves to the program to allow you to modify the game's files. These hacks can use anywhere from 200-450mb of RAM, and most anti-cheats can pick it up depending on how secure the security tag is, but with things like .ahk files or macros it doesn't use enough memory for an anti-cheat to look at it and be worried about it. Plus it doesn't attach to the game. Now I don't know how Battleye works to know how it scans for that.. I've been told it looks for inhuman actions like 1ms click intervals, because no one can do that, but a mouse recorder records human actions, so I'm not for sure if its detectable.

So I'm just wondering if .ahk is detectable. I've been told yes, and no. I need to know.