Including CI4 resources in custom libraries

You got it - you create them just like you would in a controller/model.

PLEASE write that in the docs?

It would be super awesome if the docs got some attention with in context meaningful examples of using things in controllers, models, and views. Libraries, config files, helpers, etc - all could use some contextual examples to show off the correct way to access/call the thing and then utilize it.

I'm a long time CI user and would love to see the docs return to the helpfulness of v2 docs (which also had the wonderful slidedown panel with everything on it, making finding anything so much easier - I swear I spent the first minute or two trying to sort out which section of the docs anything belongs to)