Code-style issue #1.
You pass a location of your ClientProxy to be com.TMod.skyc.client.ClientProxy but it actually is com.TMod.TMod.client.ClientProxy
if someone made a mod that put 1.13 biomes and mobs into 1.12.2 That would be great. The best of both worlds. But that won't happen, 1.13 is just too different from 1.12.2, and while I'm having tons of fun with it I really miss my mods .