As this is the first time I pit something online for Cairn: are there trusted texts to include?

I guess there’s some pseudo license text including links to the system.

And a sentence like: “Hobs are a creation of…” might be in order.

And is there a fixed way we establish the jam?

So many questions just to be on the safe site :-D

I release all my stuff via the Creative Commons license. Basically share and share alike, giving me credit preferably.

https://creativecommons.org/licenses/by-sa/4.0/deed.en

You don't have to release yours that way. If you want to give me a creator credit, that would be wonderful. You can link to my itch account. 

This last question I'm afraid I don't get. Perhaps you can clarify. 

If you mean linking back to the jam, I've seen folks indicate in the credits that it was made for such and such jam, I tend to forget to do that. But will link to the jam in the game description on itch.

Hope that helps!