CurseForge · Minecraft mod
Arc Lib
Data driven action, reward, condition library.
Quick answer
Which Arc Lib release matches 1.21.5 Fabric?
Arc Lib Arc Fabric 1.21.5 - 1.9.6-1.21.5 targets 1.21.5 with Fabric. The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server. 1 required mod needs a matching file.
Where it goes
Is Arc Lib required on the client, server, or both?
The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server.
The source does not explicitly classify this release as client-only or server-only.
What else does Arc Lib Arc Fabric 1.21.5 - 1.9.6-1.21.5 need?
Arc Fabric 1.21.5 - 1.9.6-1.21.5 on 1.21.5 Fabric. Every mod below is checked against that same setup.
Install Architectury API, YAML Config, UI Lib, Fabric API first, but 1 required mod has no matching file for this setup. Do not mix loader builds to force a match. 1 comes through another mod in the chain.
1 extra mod was pulled in by another dependency. 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 Arc Lib without breaking your instance.
Built for Arc Lib Arc Fabric 1.21.5 - 1.9.6-1.21.5 on 1.21.5 Fabric. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use Arc Fabric 1.21.5 - 1.9.6-1.21.5. It targets 1.21.5 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Architectury API, YAML Config, UI Lib, Fabric API first, but 1 required mod has no matching file for this setup. Do not mix loader builds to force a match. 1 comes through another mod in the chain.
- 03
Put it on the correct side
The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside Arc Fabric 1.21.5 - 1.9.6-1.21.5. It opens that exact file at the source.
About this project
What does Arc Lib add?
Arc is a powerful and versatile data-driven action mod library specifically designed for mod developers in Minecraft. This comprehensive library empowers developers to incorporate dynamic actions, conditions, and rewards into their own mods, providing a seamless and customizable experience for players.
With Arc, mod developers can easily implement the Action, Reward, and Condition (ARC) framework into their mods, enabling them to create complex gameplay mechanics and immersive features. By leveraging this library, developers can add a layer of interactivity and progression to their mods, enhancing the overall player experience.
The core functionality of Arc revolves around the ARC framework, which allows mod developers to define and configure actions, conditions, and rewards based on specific in-game events and criteria. This powerful system enables the creation of unique gameplay elements, where actions trigger rewards when the associated conditions are met.
For example, a mod developer utilizing Arc can define an action such as "On Block Place." They can then set the condition to specific blocks like "Stone" or "Dirt." Finally, they can assign a reward, such as "1 Diamond," which will be granted to the player upon meeting the condition.
The library provides a wide range of customizable options for actions, conditions, and rewards. Developers can define actions based on various in-game events, including interactions with entities, block placements, item usage, mob defeats, and much more. Conditions can be set using criteria such as block types, item properties, entity attributes, player location, game time, or any other relevant game state. Rewards can be tailored to include items, experience points, buffs, or any other desired benefits.
Arc offers a developer-friendly interface, making it easy to integrate the library into existing mods and modify existing gameplay systems. It provides comprehensive documentation, examples, and code snippets, enabling mod developers to quickly grasp and utilize the full potential of the ARC framework.
By incorporating Arc into their mods, developers can unlock limitless possibilities for creating engaging quests, custom achievements, unique challenges, and intricate gameplay mechanics. The library seamlessly integrates with other popular Minecraft mods and customizations, ensuring compatibility and flexibility.
Empower your mod development journey with Arc - the ultimate data-driven action mod library for Minecraft. Harness the power of dynamic actions, conditions, and rewards, and elevate your modding experience to new heights.
Project description from CurseForge.
Pick your setup
Arc Lib by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.2
2 loader builds26.1.2
2 loader builds26.1.1
2 loader builds26.1
2 loader builds1.21.11
2 loader builds1.21.10
2 loader builds1.21.9
2 loader builds1.21.8
2 loader builds1.21.7
2 loader builds1.21.6
2 loader builds1.21.5
2 loader builds1.21.1
2 loader buildsShowing the newest 12 of 13 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Arc Lib versions and loaders
Arc Fabric 1.21.5 - 1.9.6-1.21.5
arc-1.9.6-1.21.5-fabric.jar
12 Sept 2025
Arc Fabric 1.21.5 - 1.9.5-1.21.5
arc-1.9.5-1.21.5-fabric.jar
7 Sept 2025
Looking for an older file? The official CurseForge project page is in Resources.