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Arc LibMinecraft mod for 26.1.2

Data driven action, reward, condition library.

client and servernewest supported 26.1.2Library
Latest version
21.2.1
Minecraft
1.19.2 to 26.1.2
Java
Java 25+
Loaders
NeoForge, Forge, Fabric
Licence
Apache-2.0
Downloads
224.9k
Updated
4 d ago
Available on
Modrinth
Space NodeOur hosting

Host Arc Lib servers

One click and Arc Lib is installed with the right loader, on hardware built for it.

  • 26.1.2
  • NeoForge
  • Forge
  • Fabric
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version Arc Lib declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
26.1.2NeoForge, Forge, Fabric25+declared9 Apr 2026
26.1.1Fabric, NeoForge, Forge25+declared1 Apr 2026
26.1Fabric, NeoForge, Forge25+declared24 Mar 2026
1.21.11NeoForge, Forge, Fabric21+declared9 Dec 2025
1.21.9Fabric, NeoForge, Forge21+declared30 Sept 2025
1.21.8Forge, NeoForge, Fabric21+declared17 Jul 2025
1.21.7Forge, Fabric, NeoForge21+declared30 Jun 2025
1.21.6NeoForge, Forge, Fabric21+declared17 Jun 2025
1.21.5Fabric, NeoForge, Forge21+declared25 Mar 2025
1.21.1Forge, NeoForge, Fabric21+declared8 Aug 2024
1.21Forge, NeoForge, Fabric21+declared13 Jun 2024
1.20.1Forge, NeoForge, Fabric17+declared12 Jun 2023
1.19.2Forge, NeoForge, Fabric17+declared5 Aug 2022

Download

From Arc Lib’s own host. Nothing is re-hosted here.

All 30 releases
21.2.1release31 Jul 2026

arc-neoforge-21.2.1.jar · 0.7 MB · for 26.2

Download latest
863598ee86c0…
Older versions24
  • 20.2.431 Jul 202626.1.20.7 MB6 downloads1a0359d93cfd…Get
  • 21.2.029 Jul 202626.20.7 MB2.1k downloads0110eb8275f5…Get
  • 20.2.314 Jun 202626.1.20.7 MB1.7k downloadsce6a28804caa…Get
  • 9.0.021 May 20261.21, 1.21.10.4 MB4.8k downloadsedb321b8fe71…Get
  • 20.2.227 Apr 202626.1.20.7 MB17.1k downloads8792bfdbbb1e…Get
  • 20.2.127 Apr 202626.1.20.7 MB16 downloads399fc537089e…Get
  • 20.2.027 Apr 202626.1.20.7 MB20 downloads252eace66a54…Get
  • 20.1.110 Apr 202626.1, 26.1.1, 26.1.20.6 MB502 downloads8064272bd60a…Get
  • 20.1.08 Apr 202626.1, 26.1.10.6 MB52 downloads89e3b8fb5da5…Get
  • 19.1.120 Feb 20261.21.110.7 MB31.1k downloadsc62ed36016c8…Get
  • 19.1.019 Feb 20261.21.110.7 MB242 downloads0151728840aa…Get
  • 19.0.42 Feb 20261.21.110.7 MB108 downloadse58ae75d9a85…Get
  • 19.0.324 Jan 20261.21.110.7 MB46 downloads5b3bc1eb59e2…Get
  • 19.0.221 Dec 20251.21.110.7 MB8.7k downloads9fa724562ba1…Get
  • 19.0.121 Dec 20251.21.110.7 MB109 downloads68cee077c6c2…Get
  • 19.0.020 Dec 20251.21.110.7 MB40 downloads4e6170806c7a…Get
  • 1.9.5-1.21.119 Nov 20251.21, 1.21.10.4 MB4.1k downloads24173346a8f8…Get
  • 1.9.7-1.21.610 Oct 20251.21.6, 1.21.7, 1.21.80.4 MB4.0k downloadsc7d63a8b988f…Get
  • 1.9.7-1.21.910 Oct 20251.21.90.4 MB390 downloadsbb079d7abbe7…Get
  • 1.9.6-1.21.93 Oct 20251.21.90.4 MB131 downloads34dbcc68f9f4…Get
  • 1.9.6-1.21.612 Sept 20251.21.6, 1.21.7, 1.21.80.4 MB591 downloadsfcc9a98b5753…Get
  • 1.9.6-1.21.512 Sept 20251.21.50.4 MB500 downloads5ffe409f514e…Get
  • 1.9.5-1.21.67 Sept 20251.21.6, 1.21.7, 1.21.80.4 MB52 downloadsb5713792454c…Get
  • 1.9.5-1.21.57 Sept 20251.21.50.4 MB58 downloadsc48edde3646c…Get

Frequently asked

Does Arc Lib work on Minecraft 26.1.2?

Yes. 26.1.2 is the newest Minecraft version Arc Lib declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Arc Lib support?

Everything the author has declared, from 1.19.2 up to 26.1.2. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Arc Lib on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does Arc Lib support?

NeoForge, Forge, Fabric. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Arc Lib?

On the newest Minecraft version it supports, Java 25 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is Arc Lib under?

Apache-2.0, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Arc Lib?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Arc Lib safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

BookshelfAn open source library for other mods!Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftJourneyMapReal-time map used for mapping in-game or your browser as you explore.Architectury APIAn intermediary api aimed to ease developing multiplatform mods.Enchantment DescriptionsAdds in-game descriptions for enchantments to tooltips.Jade 🔍Shows information about what you are looking at. (Hwyla/WAILA fork for Minecraft 1.16+)

Last checked 4 d ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .