I found T86444 but no discussion when or how that Herald rule was created or who requested it. :-/
I agree with the sentiment of this task, but up to those following Commons tasks to say what they want (and "they" is also blurry here I guess).

Hmm, how to make decisions and change... The Commons project tag in Phab has 32 "members"; 15 have been active in Phabricator in the last 6 months:
@Nemo_bis, @JeanFred, @Bawolff, @Dereckson, @Billinghurst, @zhuyifei1999, @El_Grafo, @Poyekhali, @Stang, @Thibaut120094, @Tulsi_Bhagat, @CptViraj, @JoKalliauer, @Uata1122, @Maka
Question is: Do you still want the Phabricator Commons project tag to be added to every task tagged with the MediaWiki-File-management project tag?
Or is that too noisy? See https://phabricator.wikimedia.org/tag/commons/ for lots of tasks (not sure who looks at that workboard?)
Opinions welcome. Thanks!

@Peachey88: Any better idea how to get feedback from folks? :)

Lets just do it, and then see if anyone complains.

Every time I look at the history on the commons project tag I never see any history that makes it look like anyone is monitoring the workboard

It probably got replaced with the bot which means it will be a patchset to action