I have a request for an SCP I want to be added to the mod. I know that there is still a lot of work to be done on the mod, but I think you can easily implement this SCP, especially since there is something like it in Minecraft already. It is 727-J.
In all seriousness, I really like the mod. I think it's better than the previous SCP mod, which was more based on containment breach than SCPs as a whole.
There are minor bugs and some SCPs that aren't finished yet, but it is very well polished for a first version. I'm really looking forward to the gas mask and the heart of darkness being finished in particular.
I have my own recommendations for SPCs on the off chance you're interested, but I can tell you now that I'd love this mod even if it just finishes the current SCPs in it.
To quote the wiki: "SCP-727-J is a large, celestial object positioned approximately 149,600,000 km from the Earth, and is 1,391,000 km in diameter. SCP-727-J was originally considered to be of considerably smaller volume; however, examination by Foundation Personnel led to the discovery of its large size and classification as an SCP object."
727-J is the sun. The article goes into detail on how the foundation tried to kill the sun and how it is an SCP because it "breaks" several known laws of physics.
Needless to say, the sun is already in minecraft. Though several items from the termination attempts could be included.