Re crafting and mechanics
As a ref I'm thinking about crafting in three categories: Mechanical, Quasi mechanical, and Social
Mechanical crafting: the listing in the rules for the Crafter broad category is what you look for here. Mostly repair and support skills for your team in the wargame. This is applying crafting RP for a mechanical benefit. As this game matures there may be more things added under this banner (the lockbox is a current example) This is a well defined, but intentionally small category
Quasi mechanical crafting: This is the loosely/undefined but broad category. The rules imply that things are useful (the blue sash needed for Mage Armor, war machines, lifewards, the various material for doing skills (bandages or completely different healing tools, alchemical everything, ect)) but intentionally don't define more than we need to. The rules for winning the contest with banners, force of arms, and thievery are well defined because they need to be, applying crafts and creativity to the same problem is intentionally left open so we have room to say "that's awesome! Go for it". Rituals, ritual circles, gardens, laboratories, healers refuges, wards and all the other things that can be done will only become stronger with the addition of craft and creation. Some of this is defined, but intentionally hidden behind "find out in game" some is leaving space for us as refs to respond, reward, and build on what you find engaging.
As an example, if someone creates a woven momento mori recording the deaths of characters by incorporating a trinket or fibers from their kit in some way that's a powerful artifact for shadow, even if we don't have a specific mechanic defined for it yet.
Social Crafting: This category is undefinable in mechanical terms. What we're really doing is building a community. Most of the time at a game like this is unstructured. Plot won't come to you, you make what you will of the world. The time spent working on a thing in this world, with other people will, honestly, matter more than any mechanical points I can assign as a ref.
Hope this helps, -Andrew