Assuming something like [#5522], it would be helpful to have moderation of neighborhood project membership.
The neighborhood moderator(s) would be able to invite projects to be part of a neighborhood, and that project could accept or decline.
Alternately, a project could request membership, and the moderator(s) would accept or decline this request.
A member project could recommend another project for membership. Or an authenticated visitor to the neighborhood page could suggest a project for membership. These requests would go into the moderator queue.
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Related
Tickets:
#5522There's already the /_moderate tool on a neighborhood, which has an "invite" and "evict" option, but it's not at all clear what either one of these actually does. See also [#5526]
Related
Tickets: #5526