Is there going to be any lore about the Frost Line?
TL;DRFrost lines already exist in the setting: they've calculated reasonable distances by star class with consultants and place planets accordingly, but he knows of no further dedicated lore beyond that.
We have mentioned the Frost Line. I specifically used the term Frost Line in this month's Galactic Guide coming out in Jump Point today. I don't know if there's something more than, do you mean do solar systems have frost lines? The answer is yes. We've been working with our consultants to calculate what is a reasonable distance based on which class of star is in a system, and so we have the green zones and the frost lines, and we try to make sure that the planets line up with where they're supposed to be in a system, because of science. Something that's been interesting happening to me as I started working on this project, getting more invested in space news, is seeing how every week a new story comes out of, hey, that thing that we all said was impossible? Well, we found it. It's here. It's not impossible. We were wrong.