Fabric Overlays Explanation

Pack overlays, (or also called Minipacks by a few), are a system provided by Fabric themselves.

Their docs are located here

Custom Overlay Conditions

catharsis:config

A Fabric Condition Object object

• condition: catharsis:config
• pack: The ID of the pack containing the config.
• id: The ID of the config option to check.
• value: (Optional) The specific value to match (used for dropdowns).

catharsis:version

A Fabric Condition Object object

• condition: catharsis:version
• type: Either MINECRAFT or PACK_FORMAT
• minecraftPredicate: Required if MINECRAFT, uses Fabric's System
• packFormatRange: Required if PACK_FORMAT
  • min_inclusive: The minimum pack format version.
  • max_inclusive: The maximum pack format version.