Any chance to get fabric support?

Oky, I managed to compile and very briefly test a first 1.19 Fabric version for the mod, do you like to assist with testing? ;)
(file removed, -> update below).

Quick correction, I forgot something that causes a server crash in the initial build above. Correction is here ...
redstonepen-1.19-fabric-1.0.11.zip

Hi, before I answer let me take a look at Fabric ;)

Many mods use a kind of "multi compile" thing. But I am not so familiar with minecraft modding.
See maybe a example here? https://github.com/jaredlll08/Clumps

Thanks for checking this out. The main work will likely be the compatibility of the java code, and how I can project the library I have already for Forge to Fabric. Some things seem easy to port, others (like registries, block/item overrides, Forge-events, config, rendering, etc) are quite differently handled. I'll experiment a bit what is possible and where the problems are located ;)

Okay, the initial beta build is on Curse.