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JJC Library

JJC Library

MOD
A core API and library mod for extending JujutsuCraft with custom cursed techniques, domains, and mob systems.
by Slytharis
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Updated Oct 14, 2026
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Addons Utility & QoL
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JJC Library

A lightweight API framework designed to expand the capabilities of JujutsuCraft. This mod serves as a dependency for addon developers, allowing them to bypass native MCreator constraints and cleanly integrate custom mechanics.

Note: This is a library mod. It does not add playable content on its own.

For Developers:

  • Custom Techniques & Skills: Register completely custom cursed techniques, passive skills, and physical attacks using a streamlined Java API (CustomTechnique & CustomSkill).
  • Domain Expansions: Built-in logic wrappers for executing custom Domain casting and active tick loops.
  • Mob System: Give custom entities authentic Cursed Energy regeneration and physical grade-based scaling using MobSystem.setupMobStats().
  • Seamless GUI Integration: Injects a "Custom Techniques Library" directly into JujutsuCraft's native selection screen.
  • Advancement Hooks: Easily grant advancements upon defeating custom mobs via built-in Mixin hooks.

jjclibrary-2.0.0.jar
MC Client, 1.20.1, Forge, Server
Release 2026-09-18 Get
jjclibrary-1.5.2.jar
MC Client, 1.20.1, Forge, Server
Release 2026-09-17 Get
jjclibrary-1.6.0.jar
MC Client, 1.20.1, Forge, Server
Release 2026-09-17 Get
jjclibrary-1.5.1.jar
MC Client, 1.20.1, Forge, Server
Release 2026-09-16 Get
jjclibrary-1.5.0.jar
MC Client, 1.20.1, Forge, Server
Release 2026-09-12 Get
jjclibrary-1.4.0.jar
MC Client, 1.20.1, Forge, Server
Release 2026-09-10 Get
jjclibrary-1.3.0.jar
MC Client, 1.20.1, Forge, Server
Release 2026-08-16 Get
jjclibrary-1.2.5.jar
MC Client, 1.20.1, Forge, Server
Release 2026-08-08 Get
jjclibrary-1.2.4.jar
MC Client, 1.20.1, Forge, Server
Release 2026-07-03 Get
jjclibrary-1.2.3.jar
MC Client, 1.20.1, Forge, Server
Release 2026-07-01 Get
jjclibrary-1.2.2.jar
MC Client, 1.20.1, Forge, Server
Release 2026-05-16 Get
jjclibrary-1.2.1.jar
MC Client, 1.20.1, Forge, Server
Release 2026-05-06 Get
jjclibrary-1.1.1.jar
MC Client, 1.20.1, Forge, Server
Release 2026-05-01 Get
jjclibrary-1.0.0.jar
MC Client, 1.20.1, Forge, Server
Release 2026-04-30 Get
jjclibrary-1.1.0.jar
MC Client, 1.20.1, Forge, Server
Release 2026-04-30 Get
JJC Library v1
MC Client, 1.20.1, Forge, Server
Release 2026-04-21 Get

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