Worldbuilding Things (I'll add these to the universe entry in a bit, haha):
1) I'm thinking about a century has passed, give or take a couple years - long enough for most of the previous generation to be gone, especially given the harsh and unpredictable climate and messed-up gravity, but not long enough that there aren't Old World supplies for the Sunderscapers to make use of.
2) Since the warehouses they build cities around are usually filled with various eclectic supplies in bulk, the people make recycle old caches of paper. I've read about rudimentary paper making, and the shredding-mixing-pressing-drying process seems doable. It's not going to be high quality bristle board or anything, but it's better than nothing.
3) The blacksmiths usually find a need for helmets and assorted gauntlets/armor portions, as well as providing supports for the carpenters and builders to work with, but they also deal in traps and weapons, too - mostly of the sharp and blunt persuasions. But leatherworking and fabric are also in high demand too, so what ends up happening - especially for people interested in journeying past city limits into the wastelands - is a joint effort between blacksmiths, tanners and seamstresses to create protective and functional gear.
4) Agriculture is highly valued within the communities, yeah! The inhabitants have gotten basic farming down to a science pretty quickly - the seedbanks scattered around the Sunderscape in long-abandoned bunkers are what kept society fed and alive when it became clear that hunting the obviously endangered animals was a temporary solution. While foraging is possible, given how many seeds have been scattered by the winds, it's much easier to live off of the gardens surrounding the central warehouses, which grow everything from lettuce to spinach to garlic, though nothing exotic or tropical.
5) Honestly, I've been considering how life adapts to screwy gravity, too! Maybe vinelike plants like honeysuckle or morning glories would learn to grow up in low-gravity areas, like kelp in the oceans, and learn to spread out their leaves more to catch more sunlight that way?? Or maybe rabbits populating an dense gravity well would adapt to the high resistance, and so they'd overtake the "normal" strain of rabbits that can't jump as efficiently as they can in nominal gravitational circumstances? It's something to think about for sure…