"Steam API failed to initialize. Workshop subscribed items will not be available."

[Mudbill]

I'm not sure because I haven't tried anything yet myself. I think you just create a "mods" folder in the root of SOMA and put them there. Try the examples as a template. If you download stories from the workshop, they will be placed elsewhere and can only be launched through Steam, unless you move them to the "mods" location.