Wiki 9Minecraft Kotlin for Forge Wiki
Kotlin for Forge Wiki

Kotlin for Forge Wiki & Guide

wiki.9minecraft.net/kotlin-for-forge-mod/

The community wiki and guide for Kotlin for Forge — recipes, items, tags and mechanics, kept current for every Minecraft version the mod supports.

0recipes · MC 1.21.1
0recipes · MC 1.20.1
0wiki pages
2MC versions
Updated 70 days ago48.6M downloads857 followersLicense: GNU Lesser General Public License v2.1 only

About this mod

Used to make mods with the Kotlin programming language. Works by shading the Kotlin libraries, providing KotlinLanguageProvider to load @Mod object declarations, providing AutoKotlinEventBusSubscriber to load @EventBusSubscriber declarations, and providing useful utility functions and constants.

As of Kotlin for Forge 1.8.0, this provides Kotlin 1.4.21, Kotlin coroutines 1.4.2, Kotlin JSON serialization 1.0.1, and Jetbrains annotations 20.1.0.

If you're not a mod developer, this is a dependency mod.

Unlike Kottle, this library (as of 1.2.0) provides its own implementation of IEventBus that supports IEventBus#addListener and IEventBus#addGenericListener with function references.

Information for how to implement can be found here. You do not have to use the language loader or any of the features Kotlin for Forge provides, you can just use it for the bundled Kotlin libraries.

If you'd like to ask for help or suggest something, feel free to do so on the Kotlin for Forge discord server.

Compatibility

Which Minecraft versions and mod loaders the mod supports.

LoaderMC 26.2MC 26.1.2MC 26.1.1MC 26.1MC 1.21.11MC 1.21.10MC 1.21.9MC 1.21.8MC 1.21.7MC 1.21.6MC 1.21.5MC 1.21.4
Forge
Neoforge

Recent updates

Latest releases with the author's changelog notes.

5.12.0 2026-06-28 · forge, neoforge · MC 1.20.6, 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8

Kotlin for Forge 5.12.0

6.3.0 2026-06-28 · neoforge · MC 1.21.9, 1.21.10, 1.21.11, 26.1, 26.1.1, 26.1.2, 26.2

Kotlin for Forge 6.3.0

6.2.0 2026-03-10 · neoforge · MC 1.21.9, 1.21.10, 1.21.11, 26.1, 26.1.1, 26.1.2

Kotlin for Forge 6.2.0

5.11.0 2026-01-17 · forge, neoforge · MC 1.20.6, 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5

Kotlin for Forge 5.11.0

6.1.0 2026-01-17 · neoforge · MC 1.21.9, 1.21.10, 1.21.11

Kotlin for Forge 6.1.0

Mods in the same category as this one.

Fabric APICloth Config APIYetAnotherConfigLib (YACL)Fabric Language KotlinArchitectury APIJust Enough Items (JEI)

Version history

Kotlin for Forge 4.12.0 (MC 1.20.1) → 5.12.0 (MC 1.21.1): 0 recipes added · 0 recipes removed · 0 recipes updated.