The Create Repository form looks like the following

It would be helpful to describe the fields on this form a bit better. And even the basic rules

CALLSIGN
For instance, we should describe that "CALLSIGN" must be all upper case, no spaces, and is used to reference this repository in tasks, etc. (using the rXXXXX syntax)

Short Name
Note that the short name is used in URI's for the repo, and URI in Phorge to the repo

This would be helpful when setting up new repos.

The diviner doc is at https://we.phorge.it/book/phorge/article/diffusion_managing/

Related

Somewhat adjacent to this task is T15151: Allow to prefill the Diffusion creation form with Policies and preference on "Enormous changes"