In @erlend_sh 's thread on Autonomous identity for the pluriverse based on OAuth/OIDC, I came across a reference to the Noosphere protocol, which describes itself as;
“You can think of it like a world-wide Wiki.”
The repo has been archived, and I can’t find any luggage tags indicating whether the project continues in any form elsewhere. But potentially another group of decentralised wiki implementers to reach out to?