I am currently working on a FabricMC style modloader for a java mmo.
My prototype worked great, now working on the tooling so remapping all the ProGuard names from SLK4D23JF (class method field) names can be mapped to intermediary names with a tool to will reapply intermediary names based on bytecode analysis when the game updates and all the proguard names change. I mapped all the classes to human readable names already, got a couple 1000 method and fields renamed. This is going to be a huge token burner.