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prefab-custom-addon project artwork

Modrinth · Minecraft mod

prefab-custom-addon

A NeoForge addon for Prefab 1.20.1，1.21.1, adds custom building extension packs, works for both client and dedicated server。

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which prefab-custom-addon release should I use?

Updated 3 days ago
Latest stable file 2.0.2
Game version 1.21.1
Loader NeoForge

prefab-custom-addon 2.0.2 targets 1.21.1 with NeoForge. Installation on the client is optional. Installation on the dedicated server is optional. All 3 required mods have matching files.

Where it goes

Is prefab-custom-addon required on the client, server, or both?

Installation on the client is optional. Installation on the dedicated server is optional.

Client Optional
Dedicated server Optional
Loader for this release NeoForge
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

The source marks this as usable on both the client and server.

Understand client and server requirements Read the Minecraft installation guide

What else does prefab-custom-addon 2.0.2 need?

2.0.2. Change the file and its required mods may change too.

All 3 required mods have matching files

Install Prefab, LDLib, Cloth Config API first. We found matching files for this game-version and loader setup. 2 come through another mod in the chain.

2 listed on this file 2 pulled in by those mods
Prefab Needed by prefab-custom-addon 2.0.2
required
Matching file found Matched file: 1.0.9
LDLib Needed by prefab-custom-addon 2.0.2
required
Matching file found Matched file: mc1.21.1-2.2.38.a-neoforge
Cloth Config API Needed by Prefab
pulled in
Matching file found Matched file: 15.0.140+neoforge

2 extra mods were pulled in by other dependencies. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.

Before you install it

Add prefab-custom-addon without breaking your instance.

Built for prefab-custom-addon 2.0.2. Pick another file and the loader, install side or required mods may change.

  1. 01

    Stick to this file

    Use 2.0.2. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.

  2. 02

    Bring the mods it needs

    Install Prefab, LDLib, Cloth Config API first. We found matching files for this game-version and loader setup. 2 come through another mod in the chain.

  3. 03

    Put it on the correct side

    Installation on the client is optional. Installation on the dedicated server is optional.

  4. 04

    Pick the file you checked

    Use the “Get this file” button beside 2.0.2. It opens that exact file at the source.

About this project

What does prefab-custom-addon add?

Prefab Custom Addon

Prefab ships with a handful of buildings. After a while you get bored of them.

This addon adds an extension pack system: press Z in-game to browse and download community-made packs, or press X to make your own.

Downloader — browse community packs, pick one, drops into prefab-extension/, ready to use next time you load a world.

Creator — local workspace mode. Fill in a form, pick an NBT, pick a cover image, a few clicks and you have a standard extension pack (with ZIP). Everything lives in prefab-work/ at your game root. Export NBT files using the vanilla Structure Block.

Requires: Prefab 1.0.7+, LDLib2 2.2+. Tested on NeoForge 21.1.233 / MC 1.21.1 / Java 21+.

Keybindings

Key Action
Z Open extension pack downloader
X Open extension pack creator

Folder Layout

The workspace folder mirrors the published pack format:

prefab-work/
├── <pack_id>/
│   ├── information/
│   │   ├── <pack_id>.txt
│   │   └── cover.png
│   └── construction/
│       ├── <building_id>.nbt
│       ├── <building_id>.png
│       └── <building_id>.txt
└── <pack_id>.zip          ← auto-generated

Any change under prefab-work/<id>/ triggers an automatic repack into prefab-work/<id>.zip. To install a pack manually, unzip the file into prefab-extension/<id>/.

Dependencies

Mod Version Required Purpose
Prefab 1.0.7+ yes core — provides GuiStructure, BuildBlock, etc.
LDLib2 2.2+ yes UI utilities

NeoForge 21.1.233 on Minecraft 1.21.1.

Project description from Modrinth.

Pick your setup

prefab-custom-addon by Minecraft version and loader

Choose the version and loader you play, then open the matching release.

1 available setups

Check the dependencies, then try the file in a copied instance before changing a world you care about.

Recent files

prefab-custom-addon versions and loaders

7 of 7 releases match

Looking for an older file? The official Modrinth project page is in Resources.

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