r22.5 WIP is now released to WIP backers via the Researcher Intranet. It contains the basics for LUA modding. It’s not full featured enough for any serious modding, as there’s only a handful of exposed functions, but it lets you poke around with the new modding tools and create code mods for the game.
To get started, try a sample mod or learn about how to create a new entity.
Also, editing on the wiki was broken for some amount of time, but it’s fixed now. Sorry if you ran into that issue!