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Arc Lib

Data driven action, reward, condition library.

FabricNeoForgeForge
Loaders
FabricNeoForgeForge
Downloads on Modrinth
261K
Followers on Modrinth
25
versions
162
Updated
September 12, 2026Sep 12
Published
in 2023
This is a library — other mods need it, and it adds nothing to the game by itselfRequired by 5 mods. Download it if another mod needs it.

At a glance

A library: other mods need it — required by 5 mods
Runs on Fabric, NeoForge and Forge
For Minecraft 1.21.5–1.21.9, 1.21.11–26.2 …
Needed in the game and on the server
Latest version — 19.1.3 from September 12, 2026
Requires YAML Config, UI Lib and Architectury API
Where it's needed
In gamerequiredOn serverrequired

Needed both in the game and on the server

Game versions1.21–1.21.1, 1.21.5–1.21.9, 1.21.11–26.2 …

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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.

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.

FAQ

How to install Arc Lib?

Install Fabric for your Minecraft version, download Arc Lib for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does Arc Lib support?

Arc Lib has builds for Minecraft 1.20.1, 1.21–1.21.1, 1.21.5–1.21.9, 1.21.11–26.2 ….

Is Arc Lib needed on the server?

Needed in the game and on the server

License and source
Apache License 2.0free to use and share with credit to the author
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

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