Every Mjolnir project and module comes with the documentation built-in. We do not provide auto-generated source code documentation (though the source code is documented) but actual hand written documentation; and we have our documentation as an integral part of our process.
On any mjolnir based project you may generate a html and pdf version of the documentation by running ./order librarian --manual on the project's root. You may also view the documentation directly, which is located typically in +Docs folders under each module in the form of readable markdown files.
We recomend viewing documentation generated inside the project because it may include information provided by 3rd party modules.