I added a preamble to the package form which briefly describes how owners packages work:

https://phabricator.wikimedia.org/owners/edit/form/15/

Also, upstream has documentation here

One example use of the Owners application is catching commits that weren't reviewed in Differential pre-merge (aka "cowboy commits") thus bypassing both review and server side testing.

Here's an example caught by audit: rMSCAfce251eac0ab470b1847b0dd0e47221783aedae3

How? The package owners tool combined with herald rules allows commits "without associated differential revisions" to automatically trigger an audit by the right people.

FYI I've created a stub section about "Owners" on https://www.mediawiki.org/wiki/Phabricator/Differential

@Aklapper: I've expanded it just a bit to mention audit and provide a link to the "create package" form. I think we are in pretty good shape now. The There is a brief overview on wiki and what I wrote for the form preamble, plus fairly good upstream docs.

Maybe I should write a phabricator blog post to raise awareness?

In T128372#2533947, @mmodell wrote:

I've expanded it just a bit to mention audit and provide a link to the "create package" form.

I like! (Also linked those docs from mw:Gerrit/Code review now, to cross-pollute our CR docs.)

Should we mark this as resolved or should we make some attempt to further promote the use of owners?