Well, yeah, that. I want to add conditions for a "constructable object", but I also do it without touching the recipe itself(for compatibility with mods that change ingredient requirements). Is it possible to do with like an AddForm the way you can a leveleditem list?

I am still relatively terrible with papyrus so I barely even know what to search for on the wiki :/

AFAIK this is not possible. You could still require to the SKSE team an

AddCondition()

function though.

Ah well, so much for conflict free.