CurseForge · Minecraft mod
Jacksen Core
A mod containing shared code between my other mods.
Quick answer
Which Jacksen Core release should I use?
Jacksen Core jacksencore-1.1.2.jar targets 1.21.1 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is Jacksen Core required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Jacksen Core jacksencore-1.1.2.jar need?
jacksencore-1.1.2.jar. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Jacksen Core without breaking your instance.
Built for Jacksen Core jacksencore-1.1.2.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use jacksencore-1.1.2.jar. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside jacksencore-1.1.2.jar. It opens that exact file at the source.
About this project
What does Jacksen Core add?
The shared library behind my other mods (Jacksen's Tweaks: General, Jacksen's Patches: General, Jacksen's Tweaks: Tensura and Jacksen's Patches: Tensura). It adds nothing to the game by itself. Install it only because one of those mods needs it.
What it does for them:
- Switchable modules. Every tweak and patch in my mods is a separate module with its own on/off switch in
config/<mod>/modules.json. That file also lists what each module does, what kind of change it is, and whether it is on by default. - Sensible defaults. Integrations and patches start switched on. Balance changes and diagnostics start switched off.
- Safety checks. A module only runs while every mod it needs is installed. Modules that hook into another mod's internals also check the exact version they were written for. Otherwise they stay off, and the log says which modules are active, switched off or skipped, and why.
- One-time settings take-over. If you used my older all-in-one mods (Jacksen's Tensura Tweaks or Jacksen's TR Tweaks), your on/off switches and settings are copied over automatically the first time each new mod starts. The old files are left untouched.
Fair warning: AI was used heavily in the making of this. Considering most of the mods I wanted to add patches or integrations with other mods for were entirely AI generated, I do not think that is unreasonable.
Standard Boilerplate: No reposting, no directly modifying the original mod itself. However, if you want to make a separate addon that gives more functionality, overwrites some of what I did, updates the code to later version? Feel free! And anyone is free to use it in their modpack as well. If you find any bugs you want to report, or features you think I should add, or just want me to update it because I haven't checked the mod in a while, feel free to leave a comment!
Project description from CurseForge.
Pick your setup
Jacksen Core by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Jacksen Core versions and loaders
jacksencore-1.1.2.jar
13 Nov 2026
jacksencore-1.0.0.jar
12 Nov 2026
Looking for an older file? The official CurseForge project page is in Resources.