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Quilt Kotlin Libraries
Quilt Kotlin Libraries is Quilt's official Kotlin wrappers for QSL and Minecraft. It also bundles the Kotlin StdLib, and some Kotlinx libraries. You do not need Fabric Language Kotlin with Quilt Kotlin Libraries installed.
This project requires Quilt Loader!
The Quilt Project
The Quilt project is an open-source, community-driven modding toolchain designed primarily for Minecraft. By focusing on speed, ease of use and modularity, Quilt aims to provide a sleek and modern modding toolchain with an open ecosystem.
Learn more about Quilt on our website.
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[5.0.0+kt.2.0.21+flk.1.12.3] QKL 5.0.0 + FLK 1.12.3 + Kotlin 2.0.21
by NoComment1105 on Oct 14, 2026
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# QKL for 1.21.x is here!
This release mostly just adapts to Minecraft 1.21 changes as well as provides FLK 1.12.3 and Kotlin 2.0.21!
The following libraries have been added/updated:
``
This release mostly just adapts to Minecraft 1.21 changes as well as provides FLK 1.12.3 and Kotlin 2.0.21!
The following libraries have been added/updated:
``
kotlinx-io-core ------ -> 0.5.4
kotlinx-io-bytestring ------ -> 0.5.4
kotlix-serialization-* 1.6.3 -> 1.7.3
kotlix-datetime 0.5.0 -> 0.6.1
kotlix-coroutines 1.8.0 -> 1.9.0
kotlin 1.9.23 -> 2.0.21
atomicfu 0.23.2 -> 0.25.0
[4.0.0+kt.1.9.23+flk.1.10.19] QKL 4.0.0 + FLK 1.10.19 + Kotlin 1.9.23
by NoComment1105 on Oct 14, 2026
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- QKL Core targets **FLK 1.10.19** and **Kotlin 1.9.23**.
- The extra libraries target **QSL**
8.0.0-alpha.10+1.20.4and **Minecraft 1.20.4**. (Wow, we're up-to-date with the latest release for once?) - Because of some type changes and a method removal causing breaking changes, this has caused a major version change.
## What's Changed
- Update to 1.20.4 by @SylvKT and @quinn-semele in https://github.com/QuiltMC/quilt-kotlin-libraries/pull/92
## New Contributors
- @SylvKT made its first contribution in https://github.com/QuiltMC/quilt-kotlin-libraries/pull/92
- Full Changelog**: https://github.com/QuiltMC/quilt-kotlin-libraries/compare/3.0.0...4.0.0
[3.0.0+kt.1.9.22+flk.1.10.17] QKL 3.0.0 + FLK 1.10.17 + Kotlin 1.9.22
by NoComment1105 on Oct 14, 2026
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- The extra libraries target Minecraft **1.20.2**. Future Minecraft versions will be targeted soon.
- Due to some breaking changes in the library's API, the major version has been updated. Codecs and recipes are the most changed.
- QKL-Core targets FLK 1.10.17, Kotlin 1.9.22, and the associated libraries.
## What's Changed
- fix: issues url spelling mistake by @flerouwu in https://github.com/QuiltMC/quilt-kotlin-libraries/pull/81
- Use proper publishing methods. Fix #82. Pin loom. by @SilverAndro in https://github.com/QuiltMC/quilt-kotlin-libraries/pull/84
- Update to 1.20.2 by @ellie-semele in https://github.com/QuiltMC/quilt-kotlin-libraries/pull/88
## New Contributors
- @flerouwu made their first contribution in https://github.com/QuiltMC/quilt-kotlin-libraries/pull/81
- @ellie-semele made their first contribution in https://github.com/QuiltMC/quilt-kotlin-libraries/pull/88
- Full Changelog**: https://github.com/QuiltMC/quilt-kotlin-libraries/compare/2.1.3...3.0.0
[2.1.3+kt.1.9.10+flk.1.10.10] QKL 2.1.3 + FLK 1.10.10 + Kotlin 1.9.10
by NoComment1105 on Oct 14, 2026
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- Update provided FLK, Kotlin, Gradle, and libraries (@Treetrain1 in #79)
[2.1.2+kt.1.9.0+flk.1.10.8] QKL 2.1.2 + FLK 1.10.8 + Kotlin 1.9.0
by NoComment1105 on Oct 14, 2026
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Bumps provided FLK version
[2.1.1+kt.1.9.0+flk.1.9.6] QKL 2.1.1 + FLK 1.9.6 + Kotlin 1.9.0
by NoComment1105 on Oct 14, 2026
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- Fix crashes from Mod Menu trying to access a nonexistent file
- Update to Kotlin 1.9 and FLK 1.10.8
- Full Changelog**: https://github.com/QuiltMC/quilt-kotlin-libraries/compare/2.1.0...2.1.1
[2.1.0] 2.1.0+kt.1.8.22+flk.1.9.4.
by NoComment1105 on Oct 14, 2026
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- Update to MC 1.20
- Track FLK 1.9.4 and associated libraries
- Full Changelog**: https://github.com/QuiltMC/quilt-kotlin-libraries/compare/2.0.2...2.1.0
[2.0.2+kt.1.8.20+flk.1.9.3] 2.0.2+kt.1.8.20+flk.1.9.3
by NoComment1105 on Oct 14, 2026
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Publish core separately from library, and make core align with FLK
[2.0.1+kt.1.8.20+flk.1.9.3] 2.0.1+kt.1.8.20+flk.1.9.3
by NoComment1105 on Oct 14, 2026
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Update to kotlin 1.8.20 and FLK 1.9.3
[1.1.1+kt.1.8.10+flk.1.9.2] 1.1.1+kt.1.8.10+flk.1.9.2
by NoComment1105 on Oct 14, 2026
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Libraries:
atomicfu 0.19.0 -> 0.20.0
kx.serialization 1.4.1 -> 1.5.0
kotlin 1.8.0 -> 1.8.10
qsl 4.0.0-beta.1+1.19.3 -> 4.0.0-beta.9+1.19.3
This release additionally fixes a warning on quilt loader >= 0.18.1 by requiring loader 0.18.1 and using some of its APIs
atomicfu 0.19.0 -> 0.20.0
kx.serialization 1.4.1 -> 1.5.0
kotlin 1.8.0 -> 1.8.10
qsl 4.0.0-beta.1+1.19.3 -> 4.0.0-beta.9+1.19.3
This release additionally fixes a warning on quilt loader >= 0.18.1 by requiring loader 0.18.1 and using some of its APIs
[1.1.0+kt.1.8.0+flk.1.9.0] 1.1.0+kt.1.8.0+flk.1.9.0
by NoComment1105 on Oct 14, 2026
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This release updates to Minecraft 1.19.3
It provides support for:
The math module has been disable in this release, due to Mojang changing it in great depth and limited update time. The ItemGroups extension has also been disabled for similar reasons
It provides support for:
- Kotlin: 1.8.0
- Minecraft 1.19.3
- QSL: >=4.0.0-beta.1
- FLK: >=1.9.0 (for Kotlin 1.8.0)
The math module has been disable in this release, due to Mojang changing it in great depth and limited update time. The ItemGroups extension has also been disabled for similar reasons
[1.0.2+kt.1.8.0+flk.1.9.0] 1.0.2+kt.1.8.0+flk.1.9.0
by NoComment1105 on Oct 14, 2026
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This release bumps the supported Kotlin version up to 1.8.0!
It provides support for:
There were no changes to any functionality, only dependencies to allow for use with newer Kotlin and FLK versions.
It provides support for:
- Kotlin: 1.8.0
- Minecraft: 1.19.2
- QSL: >= 3.0.0-beta.24
- FLK: >= 1.9.0 (for Kotlin 1.8.0)
There were no changes to any functionality, only dependencies to allow for use with newer Kotlin and FLK versions.
[1.0.1+kt.1.7.22+flk.1.8.6] 1.0.1+kt.1.7.22+flk.1.8.6
by NoComment1105 on Oct 14, 2026
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This is a small dependency update release for QKL
It provides support for:
Kotlin: 1.7.22
Minecraft: 1.19.2
QSL: >= 3.0.0-beta.24
FLK: >= 1.8.6 (for Kotlin 1.7.22)
There were no changes to any functionality, only dependencies to allow for use with newer Kotlin and FLK versions.
It provides support for:
Kotlin: 1.7.22
Minecraft: 1.19.2
QSL: >= 3.0.0-beta.24
FLK: >= 1.8.6 (for Kotlin 1.7.22)
There were no changes to any functionality, only dependencies to allow for use with newer Kotlin and FLK versions.
[1.0.0+kt.1.7.20+flk.1.8.5] 1.0.0+kt.1.7.20+flk.1.8.5
by NoComment1105 on Oct 14, 2026
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This is the first release of Quilt Kotlin Libraries!
This version comes with support for:
In this version of QKL you can find:
Please report any bugs you find on the Issue tracker of GitHub and enjoy your Kotlin Modding!
Thank you to all contributors that helped us get to a stable release for QKL, let's keep this up!
This version comes with support for:
- Kotlin: 1.7.20 to 1.7.22
- Minecraft: 1.19.2
- QSL: >= 3.0.0-beta.16
In this version of QKL you can find:
- Kotlin wrappers for QSL functions
- Registry DSL
- Text DSL
- Brigadier DSL
- Math operators
- A kotlinx.serialization -> Mojang serialization codecs bridge
Please report any bugs you find on the Issue tracker of GitHub and enjoy your Kotlin Modding!
Thank you to all contributors that helped us get to a stable release for QKL, let's keep this up!
[0.1.2-MODFEST+kt.1.7.10+flk.1.8.2] 0.1.2 Modfest release
by NoComment1105 on Oct 14, 2026
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- Actually fix semver
[0.1.1-MODFEST+kt.1.7.10+flk.1.8.2] 0.1.1 Modfest release
by NoComment1105 on Oct 14, 2026
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- Fix semantic versioning
[0.1.0+kt1.7..10+flk.1.8.2-MODFEST] 0.1.0 ModFest release
by NoComment1105 on Oct 14, 2026
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# Unstable release, for use with mods released for ModFest: Singularity
