#Mastodon’s #ActivityPub inbox treats object types in tiers. Note and Question are supported directly. A second tier, Article, Page, Image, Audio, Video, and Event, gets converted to a title, a summary, and a link; content itself doesn’t show. Anything outside both tiers is dropped on delivery, which is a large part of why so much of the fediverse federates as Note regardless of what the object actually is.
RE: techhub.social/@fedicon/116665🎟️ Today is the last day to get DISCOUNTED EARLY BIRD tickets for FediCon 2026 — don't miss your chance to grab a discounted pass!(Tickets will be regularly priced after today.)📅 August 6–9, 2026📍 UBC campus, Vancouver, BC🎫 Get your FOSSY ticket, which gets you into FediCon:2026.fossy.ca/attend/tickets/#FediCon #FediCon2026 #FOSSY #FOSSY2026 #FediDev #Fediverse
Drafting a proposal to add API support in #Fedify for the ActivityPub Media Upload extension, the SocialCG-incubated #C2S companion that lets clients upload media via a dedicated endpoints.uploadMedia endpoint, separate from the outbox.
Arnold Schrijver (@smallcircles) just published a fairly long thinkpiece on the future of ActivityPub and the fediverse and how we could achieve a grassroots improvement of the standards. It's well worth a read!
The #CFP for the Fediverse & Social Web track at COSCUP 2026 (Taipei, Aug 8–9) is now open! If you’re working on #ActivityPub, the #fediverse, or anything in the open social web space, we’d love to hear from you. The deadline is May 9. #COSCUP is free to attend.
Instance software is constantly evolving and adding new features. Wouldn’t it be good if there was a way for other instances to discover what features yours can handle, to determine how they will communicate?
I think it's a good time to explain how we see @badgefed and @fediprofile, how they work together, and how #badges can use #ActivityPub and the #Fediverse.
Update: we’ve decided to go ahead and submit the CFP to @COSCUP@floss.social 2026. The track will be called Fediverse & Social Web—think FOSDEM’s Social Web devroom, but in Taipei. #COSCUP is free to attend, like FOSDEM.
I’m thinking of proposing a #fediverse/social web community track at @COSCUP@floss.social 2026 (Aug 8–9, Taipei)—think FOSDEM’s Social Web devroom, but in East Asia. Before I submit the CFP, I’d love to get a sense of what to call it. What do you think?
I’ve been saying for a while that we need something like FediCon in East Asia. A dedicated conference is still a stretch, but I’ve been thinking about a smaller step:
Today @kopper@not-brain.d.on-t.work shared a post on the fediverse titled *how to not regret c2s*, and I found it genuinely interesting to read, even if I’m not sure its proposed architecture actually solves what it sets out to solve.
When I first started working with #ActivityPub, before #Fedify existed, it felt like writing web apps in Perl and CGI in the late ‘90s. Interesting, even exciting—but never comfortable. That era where your business logic and your protocol plumbing were just… the same thing:
Started laying out a rough plan for implementing FEP-ef61: Portable Objects in #Fedify—server-independent #ActivityPub identities backed by #DIDs, multi-server replication, and client-side signing. It’s going to be a long road (13 tasks across 5 phases, with a few open questions that need answering before we even begin), but I think it’s worth doing right.
there is currently a #Piefed Hackathon going on if anyone is interested in partaking. There are groups working on spanish, german, french and japanese translations, and a bunch of other things.
It’s really surprising to me that the #fediverse hasn’t agreed on a standardized way to open cross-instance #activitypub objects and instead relies on links that open in the browser. #urischeme
Day 2 in Brussels (for this trip). I think I have adjusted enough to the time-zone change that I will be (mostly) awake for FOSDEM 2026 — which takes place this weekend.
Cryptographic public-keys are one way that one can have an identity (on the Fediverse, and elsewhere) while also having privacy — through a pseudonymous identity.
with all the meta about the new social network called W going on I thought it was funny I just discovered a new flavor of #fediverse server at z.org. Looks like its author @maxfield got federation working last month and they named the software #Elektrine#fedidev
RE: varese.social/@emanuelecariatiAndré Menrath (@linos) did a great talk called [Interoperability of Events in the Fediverse] that I only just now got a chance to watch. This is an area of the #fediverse that really doesn't get enough attention, and the work that André is doing with event-federation.eu is super excellent. Anyway watch the presentation here vimeo.com/1137648835 and let's get events fully federating with all their depth and nuance intact!#fediverse #fedidev
I’ve seen hints of backfill working really well, but hadn’t seen good examples until recently. As more and more instances upgrade to the newer versions of Mastodon that support context, backfill from Mastodon instances will improve across the board.
[Fedify] is a #TypeScript framework for building #ActivityPub servers that participate in the #fediverse. It reduces the complexity and boilerplate typically required for ActivityPub implementation while providing comprehensive federation capabilities.
Found this helpful resource by Ben Boyter (@boyter@honk.boyter.org): a collection of sequence diagrams explaining how #ActivityPub/#WebFinger works in practice—covering post creation, follows, boosts, deletions, and user migration.
A ReDoS (Regular Expression Denial of Service) vulnerability has been discovered in Fedify’s HTML parsing code. This vulnerability could allow a malicious federated server to cause denial of service by sending specially crafted HTML responses.
A while back I mentioned the idea of “Fedify Studio”—a web-based toolkit for #ActivityPub debugging and development. I’ve been quietly working on shaping that idea into something more concrete.
RE: mastodon.social/@reiver/115300I just did a videochat with @sl007 —(This is the first time we chatted.)We talked about a number of Fediverse related things.One of those things was — having a regular (online) meeting.A regular (online) meeting for Fediverse developers, for those who care about the Fediverse as a social movement, and for those who care about the success of the Fediverse.I have heard others say this, too, over and over again.(And, at times, we have had them before.)#Fediverse #FediDev #SocialWeb
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Fedify: ActivityPub server framework
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Douwe!["interactionPolicy": {
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![From Alex (@folduptoys@socel.net):
"I wish i could set the thumbnail preview on these [videos] lol"](https://files.mastodon.social/media_attachments/files/115/719/543/903/064/088/original/a068a4d07cb8e76e.png)
Sebastian Lasse