I started a new playthrough this time with a few extra mods like Nexerelin, and yours. The first mission I picked up in a bar cost me 20K for a location to a terraformer. There, after fighting something WAY tougher than I had any business fighting when so new, I acquired both an Atmospheric Sublimator and a Terraformer Brainprint (that appears to be some sort of AI core). I really don't have a clue how these are supposed to be used, but more to the point... Were these added by your mod, or someone else's?
I can answer those for you. First, the "Scared spacer" quest that give you a terraformer location for 20K are from this mod, as are the two "artefacts" you got as a reward.
As to how to use them: when you make a colony on a planet with negative conditions, you will have the ability to build terraforming structures specific to the negative conditions you have there. Some work "all the way" by default. That means that after being built, it slowly starts to lower hazzard rating up to the value the relevant negative condition is worth, after which both the structure and condition are removed.
Most of the structures only work "half way". That means, the structure will start lowering the hazzard rating as in the above case, but stop at half the value. The only way to make it continue progressing past that point is to install the relevant terraforming artefact in the structure (the same way you put a nanoforge into Heavy Industry). Once the structure has an artefact, it will continue to lower the hazzard rating up to the full value of the relevant condition, after which the condition and structure get removed (the artefact is consumed in the process).
The artefact should tell you in the last line of it's description what it can be used for.