JJC Library
Java mod listed for Minecraft 1.20. Downloads from the MC Java Mods app on Android.
A core API and library mod for extending JujutsuCraft with custom cursed techniques, domains, and mob systems.
⬇ Download on CurseForgeThe author built this one for Minecraft 1.20.1 on Forge. On other versions it may install and then do nothing.
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.
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.20.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as jjclibrary-1.3.0.jar — drop this file into the mods folder
- Download size: 401 KB
- Download link checked 3 Oct 2026 — working
These come from our own check of the pack file, not from the source page.