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Atlas Core Mod for Minecraft 1.20.1, 1.21.1

A library (currently only for configs) used by Atlas Development projects

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Updated 24.10.2026

Atlas Core

A mod library for Atlas Projects

A simple library that currently provides a command library and a robust config system, if admittedly incomplete. However, it will be expanded to suit more needs as time progresses, and improvements to the config will be made.

Commands

As of right now, the command library consists of adding an argument type that allows you to use interchangeable arguments, as in, if certain arguments are not needed, then one can have the user specify the arguments provided with proper suggestions in the format <arg_name>=<arg_value>.

However, in the future the plan is to create a parameters argument which allows you to insert [--someArg value -someOtherArg], matching usual command line parameters, with suggestions for what to input.

In addition, eventually an easier way to achieve wanted results for vanilla argument types and ones which are added by Atlas Core when they are used as opts arguments.

Configs

By default, configs are stored in ./config/<mod_id>/<config_path>.json, which is where you will be able to access and edit them.

If the config has a GUI, it will appear in the Atlas Configs menu inside of Options on both pause screen and title screen. If Mod Menu is installed, the Atlas Configs menu appears as the config for Atlas Core. If a mod has an attached default config with a screen, it will become the config screen for that mod in Mod Menu.

Configs can also be read or manipulated using the command /atlas_config, which lets you reset, read, or reload configs all at once, reset, read, or reload a particular config, or edit, reset, or retrieve the value of a specific option.

For mod developers

Intrested in using this for your mod? I recommend checking out the README to see how to implement it in your mod.

How to install Atlas Core

With Millida Launcher

  1. Install Millida Launcher

    The launcher is free: download it at millida.net/launcher and sign in with any nickname.

  2. Click “Install” on this page

    The launcher opens and installs the mod for Minecraft 1.20.1–26.2 on Fabric, Forge, NeoForge or Quilt automatically.

  3. Launch the game

    A profile with it appears in the launcher: click “Play”.

Manually

  1. Install Fabric, Forge, NeoForge or Quilt

    The loader must match the game version of the mod file, for example Minecraft 26.2. After installing it, a separate profile appears in your launcher.

  2. Download the file for your version

    In the version list above, pick the file atlas-core-1.1.3.release-26.2-fabric.jar (227 KB) for your game version and loader.

  3. Put it in the mods folder

    The folder is inside .minecraft (Windows: %appdata%\.minecraft\mods). If it does not exist, create it.

  4. Launch the loader profile

    Open “Mods” in the main menu: Atlas Core should be in the list.

Versions

With dependencies

MinecraftLoaderFileDateActions
26.2Fabric, QuiltAtlas Core 26.2 1.1.3 Fabric227 KB
26.1NeoForgeAtlas Core 26.1 1.1.3 NeoForge224 KB
1.20.1ForgeAtlas Core 1.20.1 1.1.3 Forge884 KB 2
1.21.11Fabric, QuiltAtlas Core 1.21.11 1.1.2 BETA 6 Fabric218 KB 1
1.21.4NeoForgeAtlas Core 1.21.1 1.1.2 BETA 6 NeoForge216 KB 5
1.20.1ForgeAtlas Core 1.20.1 1.1.2 BETA 6 Forge880 KB

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