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Conium

Conium is a datapack and script framework for modern Minecraft, it provides very diverse features without Java coding, Conium lets you complete your mods only using datapacks.

by cao-awa· Fairydewstz, ryan100cLibraryOptimization
Fabric
Loaders
Fabric
Downloads on Modrinth
1.7K
Followers on Modrinth
12
versions
17
Updated
January 5, 2026Jan 5
Published
in 2024
This is a library — other mods need it, and it adds nothing to the game by itself
Bedrock script sample — Running a count down script using typescript when stick use on block. · swipe

At a glance

A library: other mods need it
Runs on Fabric
For Minecraft 1.21.6–1.21.8, 1.21.11 …
Needed in the game and on the server
Latest version — 1.0.0-alpha14 from January 5, 2026
Requires Fabric API
Where it's needed
In gamerequiredOn serverrequired

Needed both in the game and on the server

Game versions1.21.3–1.21.4, 1.21.6–1.21.8, 1.21.11

What is Conium

新世代を呼ぶハロー、声はまだ途切れないだろう、
新世界の扉を、ほら叩き続けよう!

Conium is a datapack and script framework for modern Minecraft, it provides very diverse features without Java coding, Conium lets you complete your mods only using the datapacks.

Warning

The full Conium feature is currently as 'on client' mode, the server needs to synchronize the datapacks and scripts to client but are not completed this feature now.

But the Conium scripting system can run on the server side completely, only the bedrock scripting APIs are not available on the server side now.

Requirements

RequirementVersionInstallsNotes
Java21+21 Or higher21 Or higher is ok
Minecraft>=1.21.11Need1.21.11 or higher can be use
Fabric language kotlin1.13.5+kotlin.2.2.10!!NeedOnly kotlin 2.2.10 can be use
Fabric API?NeedAny version is ok

Build requirements

Conium has configured whole project, just clone the repository, and reload project then run the gradle task remapJar.

RequirementVersionNotes
Java21+21 Or higher
Gradle8.14.28.14.2 or higher could be use
Kotlin2.2.10!!Only 2.2.10 can be use
Fabric loom1.13-SNAPSHOT1.13-SNAPSHOT or other could be use
Minecraft>=1.21.11Only 1.21.11 or higher can be use

NeoForge

About supporting of NeoForge, currently cannot be completed because the secure jar handler in NeoForge has conflict to kotlin native.

And Conium cannot remove kotlin native because scripting running needs, Conium may try to run script evaluator without NeoForge environment in the future.

Discord server

You can join ours discord server to chat with Conium community!

Data driven

See the Data driven

Conium script APIs

See the Conium scripting.

Bedrock script APIs

Not completed bedrock script APIs supports now, only framework able to run the samples.

Grammars

About TypeScript grammar, supported by structuring-translator: TypeScript supports

The MoLang support also based on structuring-translator but implemented by Conium: MoLang supports

Source Code and Contributions

Conium is built on an event-driven, context-oriented architecture with strong aspect-like capabilities, though it does not use event-sourced state semantics.

The codebase is architecturally complex and extensive. While we continuously improve documentation, navigating the source may still be challenging.

Therefore, we strongly recommend discussing your ideas with the core team before contributing. This ensures alignment with the project’s design and specifications.

Please note that pull requests submitted without prior discussion may be declined. For general inquiries, we encourage you to submit an issue tagged “question.”

Hitokoto

Conium will randomly roll a Hitokoto in console every time launching, the list of Hitokotos receives pull requests, only allow in English and Japanese, don't take other languages, don't accept nonsense sentences.

For the list, see ConiumHitokoto.kt.

FAQ

How to install Conium?

Install Fabric for your Minecraft version, download Conium 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 Conium support?

Conium has builds for Minecraft 1.21.3–1.21.4, 1.21.6–1.21.8, 1.21.11.

Is Conium needed on the server?

Needed in the game and on the server

License and source
GNU General Public License v3.0 onlyfree to use and share; changes to the mod itself must be published under the same license
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

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