I just finished a progress report / summary of the arbiter server that we've been working on at @roomy.space. The goal is to have an interoperable standard for group membership management on top of the ATProto permissioned space proposal. The last couple weeks were full of progress & discussion!
Arbiter Progress Report 1 - Zicklag's Leaflets
zicklag.leaflet.pubMay 13, 2026 at 6:55 PM
The Arbiter - Group Management for Permissioned Spaces and Beyond - Zicklag's Leaflets
The permissioned data proposal has the concept of membership, but leaves it to the app to orchestrate it. The arbiter is our idea for a general-purpose, interoperable ATProto group membership service.
Arbiter Progress Report 2 - Zicklag's Leaflets
A new policy-based arbiter prototype and a draft of an interoperable lexicon for group servers.
FediForum Talk: Introduction to Atproto Spaces
By Daniel Holmgren, head of protocol at Bluesky PBC. A technical overview of the recent extension of AT Protocol beyond public data to cover permissioned data and private group spaces.
proposal.md at main · opensocial.group/proposal
Proposal for Atmosphere Groups standard on atproto spaces
Arbiter Progress Report 1 - Zicklag's Leaflets
Lots of implementation progress & lots of discussion with the community.
At @roomy.space we've been cooking up the design for the next, ATProto-native iteration of Roomy, and that includes private data on protocol! The first component that we're working on is a group membership service that we're calling the "arbiter". Here's full overview of the design so far!
The Arbiter - Group Management for Permissioned Spaces and Beyond
zicklag.leaflet.pubI just finished another arbiter progress report! The arbiter is our experimental server for hosting groups and communities on ATProto. This update is more of a rambling set of notes on a potential direction, but it was informative enough that I decided to publish it as our latest update. 😃
Arbiter Progress Report 4
zicklag.leaflet.pubI've just finished the first, barely-working prototype of our new arbiter server! It's not ready for use just yet, but we're going to start experimenting with it in @roomy.space as a way to make every space a fully-fledged ATProto account that can be seamlessly managed by the Roomy space's admins.
Arbiter Progress Report 3
zicklag.leaflet.pubreminder that the inaugural ATP (atproto) working group meeting will be taking place soon! we are scheduled for the Thursday of #IETF126. you can register and participate remotely. if you have a topic you want to discuss, reply to the chairs on the mailing list; this is roughly final call
Internet Engineering Task Force
The FINAL AGENDA for the #IETF126 Vienna meeting hosted by @cisco.com has been published! It includes 100+ working sessions, an #IETFHackathon, and more planned for 18-24 July. Register today to participate with 1000+ Internet technologists from around the world: ietf.org/meeting/126/
Hey, I opened a proposal to create a working group for games on atproto! I'm want to make the work that I and others have already done more useful for applications across the ATmosphere. If you're interested in co-chairing, helping out, or just participating, let me know! #atproto #gamedev
[Proposal] WG for Games
discourse.atmosphere.communityAnother arbiter progress report! An attempt at a goups standard for ATProto. This week we talked to @habitat.network and it got us thinking about how we could inter-op, even with other projects that can't use the arbiter. Now we've got a draft lexicon that I'm hoping can work for both of us.
Arbiter Progress Report 2 - Zicklag's Leaflets
zicklag.leaflet.pubI have just finished an interactive arbiter simulator that runs right in the browser! The arbiter is our attempt at an interoperable group management system for the ATProtocol and permissioned spaces. zicklag.github.io/leaf-0.4/arbiter-simulator/
