Discourse Shared Edits allows multiple users to collaboratively edit posts in real time. This feature is default disabled and must be enabled explicitly by moderators on posts.
Moderators (including TL4) can toggle shared edits on a topic (red) via the gear icon on the composer bar. Note that the plugin does not enable edit access per se. This means that if you want non-moderators to be able to collaboratively edit the post you must also make the post a Wiki (green, optional):
I wonder if someone else considers it appropriate to show the list of all authors when the shared edits plugin is enabled.
Our main use case is to display credits on a common wiki knowledge base, where users can contribute to gain a badge and/or maintain a specific tier (old life-time subscribers β top tier while they maintain monthly real and low-effort engagement).
I think that fits better here, but it was requested as an addition to vanilla wiki categories: