Sussy Config is yet another configuration library for the fabric mod ecosystem. In simple terms, it allows modpack makers or players to modify the parameters you expose in your mod along with automatic config regeneration should the file structure be corrupted. Currently strings, string arrays and numeric data types are supported. The configuration file may be found inside the config folder within your instance installation directory.
This mod is usually not to be downloaded here unless for development purposes. Otherwise it should be included in your mod via the jar-in-jar feature available with fabric.