Fedibook groups just got a major rewrite.

[sindum@mstdn.dk]

Fedibook groups just got a major rewrite.

Groups now work as a ActivityPub group actors — meaning members from Mastodon, Pixelfed, and other Fediverse platforms can join and participate, not just Fedibook users.

Invite a @mastodon.social friend to your group, they accept the follow request, and group posts start appearing in their home timeline. They can post back via DM. It just works.

On Fedibook, groups looks just like that face-thing.

Jump over to my blog to read more
https://sindum.dk/fedibook-groups/

#Fedibook #ActivityPub #Fediverse

[smarken@mastodon.social]

@sindum Fedibook ser interessant ud

[sindum@mstdn.dk]

@smarken Tak

[niklasnisbeth@mastodon.xyz]

@sindum Det ser meget interessant ud! Prøver at spinne det op i aften hvis jeg får tid.

[sindum@mstdn.dk]

@niklasnisbeth sig til hvordan det går

[leffe@social.linux.pizza]

@sindum

That's a big 404 on the blog.

I have zero experience of that f*book thing, so I'll just have to learn. If there is a group for newbie intros, then please send me an invite!

[sindum@mstdn.dk]

@leffe argh. sorry. I have moved the fedibook posts to it's own site. There is a "This page has moved" message now. Thanks!

Fedibook Groups!

Fedibook groups just got a major rewrite. Groups now work as a ActivityPub group actors — meaning members from Mastodon, Pixelfed, and other Fediverse platforms can join and participate, not just Fedibook users. Invite a @mastodon.social friend to your group, they accept the follow request, and group posts start appearing

The Fedibook Project (about.fedibook.net)

[julian@activitypub.space]

@sindum@mstdn.dk fedibook groups don't seem to be federating content to the fediverse correctly.

I'm seeing posts that are attributed to no user. It may be an issue with how the activity is federated.

The group actor should be announcing a regular object from another user, according to 1b12.

[sindum@mstdn.dk]

@julian Thank julian - I will try to understand what that meen and catch up.

[sindum@mstdn.dk]

@julian This is what you mean right. This message should come from me and not the group?

[julian@activitypub.space]

@sindum@mstdn.dk I think so. The group is merely announcing the creation of the post, the post's attributedTo should still point to the actual author.

Thanks for looking into it!

[sindum@mstdn.dk]

@julian Hi Julian. I have worked on it and think I have working patch. It running on the fedibook.dk server. If you care to test you could join @3434-grp@fedibook.dk.

Here is a sample of a message:

{
"@context": [
"https://www.w3.org/ns/activitystreams",
"https://w3id.org/security/v1"
],
"actor": "https://fedibook.dk/ap/groups/bcfd3c1f-364c-4227-a6d4-947b42dd528a",
"cc": [
"https://fedibook.dk/ap/groups/bcfd3c1f-364c-4227-a6d4-947b42dd528a",
"https://fedibook.dk/ap/groups/bcfd3c1f-364c-4227-a6d4-947b42dd528a/followers"
],
"id": "https://fedibook.dk/ap/groups/bcfd3c1f-364c-4227-a6d4-947b42dd528a/creates/e47537ce-767a-4e83-ae00-3802dcab4ffc",
"object": {
"attributedTo": "https://fedibook.dk/ap/groups/bcfd3c1f-364c-4227-a6d4-947b42dd528a",
"cc": [
"https://fedibook.dk/ap/groups/bcfd3c1f-364c-4227-a6d4-947b42dd528a",
"https://fedibook.dk/ap/groups/bcfd3c1f-364c-4227-a6d4-947b42dd528a/followers"
],
"content": "ping",
"id": "https://fedibook.dk/ap/notes/e47537ce-767a-4e83-ae00-3802dcab4ffc",
"published": "2026-04-20T20:21:35Z",
"tag": [
{
"href": "https://mstdn.dk/users/sindum",
"name": "@sindum",
"type": "Mention"
}
],
"to": [
"https://mstdn.dk/users/sindum"
],
"type": "Note",
"url": "https://fedibook.net/groups/d2ac119f-2c22-45a0-936b-5320e3c5f832/posts/ea6cea26-e60b-4971-8439-bec2a8393bdf"
},
"to": [
"https://mstdn.dk/users/sindum"
],
"type": "Create"
}

[mayel@activitypub.space]

@sindum@mstdn.dk @julian I hope you two can join the W3C social web working group's groups task force meeting today? https://github.com/swicg/groups/issues/37

[sindum@mstdn.dk]

@mayel Hi Mayel. Thank you for the invitation - This is compleatly new for me. Do I just join the link. How long time are these meeting?

[julian@activitypub.space]

@mayel wasn't aware of it but I think I can make it.

[julian@activitypub.space]

@mayel Thanks again for the invite, I knew the task force existed but there are so many nowadays <img class="not-responsive emoji" src="https://activitypub.space/assets/plugins/nodebb-plugin-emoji/emoji/android/1f605.png?v=b31cc20ecdc" title="" />

[julian@activitypub.space]

hi @sindum@mstdn.dk! Sorry, I didn't see this message due to a regression on activitypub.space. I can't join that group, I don't think webfinger resolves...

[sindum@mstdn.dk]

Hi @julian thank for reaching out and good to see you in the meeting just now. I'm very new to this world so trying to understand all the concepts. I don't know if I solved it yet. At least I'm now able to include the author in the group message when seen on mastodon. I will post an update in the weekend with the status for this week.