Forum OpenACS Q&A: Re: What documentation does OpenACS need to train a new programmer?

A big part is the package developer's guide
https://openacs.org/doc/current/tutorial.html.

There is also the huge amount of information here  https://openacs.org/doc/current/acs-package-dev.html but there isn't any doc that ties everything together explaining how you can actually accomplish something with it.