⚠️ Developer Version of CoreClient ⚠️
This mod version includes diagnostic commands such as /client settings killlwjgl, which will crash the game and display a native JNA window. Before the crash, a confirmation GUI appears with two buttons: Confirm Crash — proceeds with the crash, and Cancel — aborts it.
Use these commands strictly for debugging purposes. This feature is not recommended for regular gameplay and is intended only for developers or advanced users.
Quick facts
- 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 Modrinth — 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.
Verified by MCModsHub
- Ships as coreclient-dev-1.2.3.jar — drop this file into the mods folder
- Download size: 11 KB
- Download link checked 13 Sept 2026 — working
These come from our own check of the pack file, not from the source page.