A modern programming language that makes developers happier.

kotlinlang

Hey everyone
I’m really proud to introduce *Nucleus* — a toolkit designed to simplify and professionalize shipping JVM desktop apps on macOS, Windows, and Linux.
After 3 years working with Compose Desktop and spending far too many hours dealing with packaging, stores, and auto-updates, I decided to build a more integrated and coherent solution.
I genuinely believe this is one of the most complete and advanced packaging solutions available today, across platforms.
Nucleus brings together:
• A Gradle plugin → 17 formats (DMG, PKG, MSI, NSIS, AppX, Snap, Flatpak…), macOS & Windows signing and notarization, store-ready sandboxed builds, AOT cache (JDK 25+), *file associations*
• Runtime libraries → secure auto-update (SHA-512 verification), ability to render with Compose inside native windows, reactive dark mode detection via JNI, single instance enforcement, deep links
• Reusable GitHub Actions → ready-to-use multi-platform CI/CD
I’d really love your feedback
:point_right: Repo: <https://github.com/kdroidFilter/Nucleus>
:point_right: Docs: <https://nucleus.kdroidfilter.com>

This is huge and could replace Hydraulic Conveyor for me! :open_mouth::fire:

Thank you so much for sharing, I'll try it! :pray::skin-tone-2:

Are the flatpaks flathub-ready with their offline build requirements?

That's usually the main hurdle publishing any gradle app to flathub

That's super cool, I'll give it a try :fire:

Curious how you've managed to solve offline dependencies for flathub. If you ever write an article about it please share.

Has anyone at least tried the demo app? I spent 3 hours drawing the Electron in Compose. :expressionless:

Capture d’écran 2026-02-19 à 21.18.46.png

I'd be happy to know if you also have pr like this, I'm starting to migrate my projects :)

&gt; Has anyone at least tried the demo app? I spent 3 hours drawing the Electron in Compose. :expressionless:
I did. It's beautiful! :slightly_smiling_face:

<@U070RR9Q6BE> :clap: this looks really nice! You’ve already mentioned that cross-compilation isn’t supported since the plugin uses platform-specific tools for package creation. But are there any plans to support it in the future, like Conveyor does?

<@U0B9ZL4N4> No, absolutely not. The price of ci today is completely negligible, I provide ready-to-use ci that require no additional configuration. and I think it would be completely impossible to generate the AOT cache in cross-platform use.