Minecraft 1.20.1, 1.21.1用Duplicationless MOD

Name: Duplicationless
Availability: InStock
Author: _nArUTo_

JSON設定、ブロックデータストレージ、チャンクと次元をまたぐエンティティ追跡を簡素化する軽量のMinecraftライブラリ。

Duplicationless

This is not a gameplay mod — it’s a library.

I made this because I was tired of writing the holy ****ing same data tracking and config code again, again, again, and again in my mods.

So instead of copy-pasting the same ten trillion lines every time, I decided to pack them all into one place — and here we are.

https://github.com/MCTeamPotato/Duplicationless/tree/1201/src/main/java/me/kall/duplicationless

Except the main entrypoint and mixins, every class is an API.

This project basically exists because I got lazy (in a productive way).

If you’re also tired of rewriting entity or block tracking logic, maybe you’ll find it useful too.

Install Millida Launcher
The launcher is free: download it at millida.net/launcher and sign in with any nickname.
Click “Install” on this page
The launcher opens and installs the mod for Minecraft 1.20.1–1.21.1 on Forge or NeoForge automatically.
Launch the game
A profile with it appears in the launcher: click “Play”.

Install Forge or NeoForge
The loader must match the game version of the mod file, for example Minecraft 1.21.1. After installing it, a separate profile appears in your launcher.
Download the file for your version
In the version list above, pick the file duplicationless-1.21.1-1.2.1.jar (226 KB) for your game version and loader.
Put it in the mods folder
The folder is inside .minecraft (Windows: %appdata%\.minecraft\mods). If it does not exist, create it.
Launch the loader profile
Open “Mods” in the main menu: Duplicationless should be in the list.

Minecraft 1.21.1 runs on Java 21: with a different Java version the game may close right after launch.

Minecraft	ローダー	ファイル	日付	操作
1.20.1	Forge	duplicationless-1.20.1-1.2.1977 KB 1	2026年8月14日
1.21.1	NeoForge	duplicationless-1.21.1-1.2.1226 KB	2026年8月14日

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