Mantle Mod 1.12/1.11.2 contains shared code for Forge mods and is used by the Slime Knights. Descriptive book code and common inventories are found here.
Mantle Mod

Requires:

 Minecraft Forge

How to install:

  1. Make sure you have already installed Minecraft Forge.
  2. Locate the minecraft application folder.
    • On windows open Run from the start menu, type %appdata% and click Run.
    • On mac open finder, hold down ALT and click Go then Library in the top menu bar. Open the folder Application Support and look for Minecraft.
  3. Place the mod you have just downloaded (.jar file) into the Mods folder.
  4. When you launch Minecraft and click the mods button you should now see the mod is installed.

Mantle Mod 1.12/1.11.2 Download Links:

For Minecraft 1.12
 Download from Server 1    Link 2