What kind of custom AI do you mean? RW already has scripting support, it's badly documented yet afaik, but it's posible to start now with something interesting or funny. IMO it's pointless to create big mods right now, but i'm going to try to make some minigames (don't know lua though lol)
Followers, companions, or 'pets' that follow you. Basically a customizable entity one can let loose in a world letting them tend to their survival in a basic manner of food and water. One that you can insert and customize as an entity of its own using basic ai, even if it's a neutral or pet-flagged character. One that would be preferable to ask you or be allowed to use your food stock-piles, fight, walk around, and defend itself freely. NPC Traders is something that needs to be looked into first then expanded from that route, or so seems it.
Wanting to let loose something similar to this - example (Warning; Anime related image). A lady themed to an arctic fox with fox ears and tail, or something more 'generic' for the other folks. (Read below for extra thoughts).
------
I'm irritated that you're always given these overly detailed and complex character creation bits to then have little to no content map wise. SKyrim was flaws in this way that it suffered but mods had to help, just not enough map wise. Japanese porn games make great use of character customization, just that you can't have them let loose in a world. Search up games made by "Illusions" named "Artificial Girl 3"....That's the closest I can get to a large open-world, somewhat. Skyrim Style.....Skyrim is too much of restrictive annoyance, and RW seems like the only option due to it being an indie game, and appropriate with graphics.
Loosely imagining using the AI found in Rimworld, Phantasy Star Online 2, Timber & Stone, and Dragon's Dogma. So far NPC Traders seems the most Rising World shall have in official features with customization still being highly desired on my end. I'm sure someone is thinking of "The Sims" but I want to stay well away from that. I'd much prefer them being in this game so I can let them do what they want, even if it's just standing or idling around while loosely following me in Rising World. Again, Skyrim has been done to death and I can't find an overly large RTS or Turn-based game world that allows you to customize your one unit while making use of a vast landscape.
Scripting, coding, programming, and whatever else is something I'm horrible and overly retarded with. I couldn't even make the computers in Minecraft's Redstone/Redpower mod with computers and Turtles run without looking like an idiot by an ex-hobby buddy, which is why I mentioned requesting a tool so I can align, insert, and customize them to my liking. Learning programming scripts and all that just constantly gives me brainfarts and constant short-circuiting behaviors
(Keep hitting submit too early that I keep having to edit my posts hastily.)