So there's this issue involving Geckolib models and having parts animate in java code, so for ~3 months I put "heads of mobs don't rotate to look at other entities" as a nofix issue and leave it be.

3 months later I discover that it is possible, and it wasn't in Geckolib's docs, but rather the example mod's classes this entire time. Right in my face.

Document ALL of your shit, please.