Krystal Core

Krystal Core is a library rather than a content mod: it contains code used across the author's projects, and other mods call into it. It adds no blocks or items of its own for players to find in survival. Its helpers cover a custom empty map that fills with a target set through the item constructor, an empty compass, and an angle item model predicate that reads the krystal core:block value, along with position data stored under the krystal core:level key.

The library also carries features used by dependent mods: a Curios renderer for custom armour, improved mob effects, combat attributes and an archaeology block entity. Curios API is optional, so the armour renderers only take effect when it is present. Krystal Core is required by Modded Material Compats, and it runs on both client and server, so the server and every player need it.

Files are published for Forge and NeoForge across five release versions, 1.18.2 – 1.21.1, with 1.19.2-1.0.1 for 1.19.4 as the latest Forge build and 2.0.4 for 1.21.1 as the latest NeoForge build. The mod is released under All rights reserved, so it is not open source, though its source code and issue tracker are public.