For changelog, you should check out our wiki
This is an experimental and unofficially supported Minecraft 1.20 build.
This build will be a bit rough around the edges. Unless your server has already been upgraded to 1.20, you should stay on 1.19.4 or below for the best experience.
On Fabric, JCM blocks are located in a separate creative tab, while on Forge it is located in the vanilla Redstone tab.
No support for MC 1.20 will be given at the moment, use at your own risk (And with backup!).