#activitypub

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Daniel Supernault @dansup@mastodon.social · 3d ago

My advice to new activitypub devs:

  • be bold: ship what big tech won't.
  • consent first: opt in, never opt out.
  • keep evolving: your v1 federation code will be wrong, and that's fine.
  • federate the future: interop over lock in, every time.

8 years in and I still come back to these.

#activityPub #fediverse #socialWeb #builders

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IFTAS @iftas@mastodon.iftas.org · 5d ago
#COSCUP continues with @evan@cosocial.ca from @swf talking about #ActivityPub 1.1 #COSCUP2026
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Do you like JSON-LD? #EvanPoll #poll #ActivityPub #JSONLD

Yes
20.3% (26)
Yes, but...
16.4% (21)
No, but...
22.7% (29)
No
40.6% (52)
128 votes Poll closed
View on cosocial.ca
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James Smith 💾 @Floppy@mastodon.me.uk · 6d ago
Excited to announce that @fedipub@ruby.social (formerly known as Federails), the Rails engine for #ActivityPub that powers (amongst other things) @manyfold@3dp.chat, has been awarded a grant in the latest round from @NGIZero@mastodon.xyz. I’ll be building community, docs, rounding out features, and ideally making it usable in non-Rails Ruby apps too! https://nlnet.nl/project/Fedipub/
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FediBoard Science @fediboard_science@flipboard.social · 6d ago
The Programmer’s Fulcrum 7 August, 2026 https://newsletter.mobileatom.net/the-programmers-fulcrum-7-august-2026/ Welcome to your weekly curation of the essential news in the Open Media Network and Open Social development communities with a focus on devastating big tech via Techno Anarchism. #activitypub #atproto #fediverse
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WRZKY @wrzky@wrzky.com · Aug 07, 2026
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Haruspex @haruspex@haruspex.shit.nexus · Aug 07, 2026
Will Pleroma have GROUPS before December 31, 2026? YES probability: 50.00% Closes: 2026-12-31T22:59:00.000000Z Created by @foolghool@shitposter.world https://haruspex.shit.nexus/m/802c87b9-2c16-475e-80b7-832bf3c1d43a #fediverse #pleroma #activitypub #prediction
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Haruspex @haruspex@haruspex.shit.nexus · Aug 07, 2026
Replying to @haruspex@haruspex.shit.nexus
Market pulse: 50.00% → 89.87% (+39.87 points) Will Pleroma have GROUPS before December 31, 2026? https://haruspex.shit.nexus/m/802c87b9-2c16-475e-80b7-832bf3c1d43a #fediverse #pleroma #activitypub #prediction
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The Real Grunfink @grunfink@comam.es · Aug 07, 2026
Boosted by fedicat @fedicat@pc.cafe
I've just published version 2.94 of #snac, the simple, minimalistic #ActivityPub instance server written in C. It includes the following changes (mostly bug fixes): The author of a replied post is no longer added to the CC: line, as it does not have much sense. Fixed mentions for users with hyphens in their identifiers. Unlisted replies to unknown posts were being skipped from the timeline, so don't do that. If an actor marked as broken gets a post boosted (proving that is [back] functioning), it's unmarked as such. Don't try (and fail) to parse non-UTC dates in posts (I'll provide a real fix eventually). Fixed a redirection loop in the /users alias. Mastodon API: fixed a bug that made changing the sensitive content string impossible, avatars and headers can be deleted (contributed by bm90). Updated Czech and Italian translations (contributed by pmjv and fidiben). https://comam.es/what-is-snac If you find #snac useful, please consider buying grunfink a coffee or contributing via LiberaPay. #snacAnnounces #FrugalFediverse
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Dima @dima@dol.social · Aug 06, 2026
Apple has a "What the heck is Mastodon?" guide sitting in the App Store. Servers, the three timelines, alt text, content warnings. They compare it to email. Thousands of independent servers, you pick one, you can talk to everyone on the others, and you can move house later without losing your contacts. I have explained this to people maybe two dozen times and never once that cleanly. I usually lose them around the word "instance", which is a word nobody outside this place has ever needed. Anyway. Nice to see it written down properly by someone with reach, even if the apps list has clearly been refreshed more often than the text. Reading it from my own instance, which is the whole point. https://apps.apple.com/ch/story/id1668483560 #Mastodon #Fediverse #Decentralisation #ActivityPub #SelfHosting #Blog #Thoughts
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Linux Is Best @Linux@planet.moe · Aug 04, 2026
Replying to @Linux@planet.moe
Post 2 of 2 Maybe it's a generational thing; I don't know. But back when online forums were popular, we didn't cave to peer pressure. Administrators had a backbone and stood up for what was right. People admitted I was right — that Gaza Verified is a scam. Yet you folded just to appease public opinion. You're cowards, every last one of you! #ActivityPub #Fediverse #Mastodon #FediAdmin #MastoAdmin #GazaVerified #Gaza_Verified #Verified_Gaza
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Imran Nazar ~ عمران نزر @Two9A@hachyderm.io · Aug 04, 2026
Boosted by fedicat @fedicat@pc.cafe
Seeking beta testers for a new opt-in Fediverse service - FediAdhan https://fediadhan.org/ Have you ever felt your #Mastodon timeline was missing something? You get regular updates about the weather, the bongs of Big Ben on the hour; perhaps even that one account that toots like a chicken. But you've been missing timely updates about the Islamic call to prayer. No longer: with FediAdhan, simply pick your location on the map and you'll get an account you can follow from your #ActivityPub client, which will drop a toot in your timeline when any of the five Islamic prayer times rolls around (and optionally for sunrise as well). And you get a neat pie chart of daylight/twilight for your location, as a bonus. Explicitly opt-in, privacy focused, #HumanMade with no LLMs used at any stage in development. Try it out, let me know if you have thoughts, feedback, issues you run into.
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Daniel Supernault @dansup@mastodon.social · Aug 03, 2026
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silverpill @silverpill@mitra.social · Aug 02, 2026

I added a list of recommended libraries to the ActivityPub developer guide:

https://codeberg.org/ap-next/ap-next/src/branch/main/guide.md#libraries

  • activity (Go, used in GoToSocial)
  • Fedify (JavaScript, used in Hollo and Ghost)
  • Fedipub (Ruby, used in Manyfold)
  • activitypub_federation (Rust, used in Lemmy)
  • APx (Rust, used in Mitra)

This list only includes libraries that are actually used somewhere. Libraries that are not used, or used in projects with too few users are not included.

#fedidev #activitypub

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Daniel Supernault @dansup@mastodon.social · Aug 01, 2026
The network effect is crucial to every social platform, and what differentiates them is how they are able to match IRL connections with online ones, and we can do this, but it needs to be done carefully and in a way that preserves privacy and user autonomy across platforms and services. No single software should have the ability to wall off access, or we become the thing we worked so hard to replace. More details soon 👀 #ActivityPub #Discovery #FriendFinder
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Len :tootsie: 🍉 @len@toot.si · Jul 31, 2026
I wonder whether there are any opportunities (for me) to work with #activitypub and #fediverse. My background is in #PHP (decoupled #Drupal), but I am keen to diversify into other languages. I also have solid experience with #REST, #bash and CLI tools. #Fedihire
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Daniel Supernault @dansup@mastodon.social · Aug 01, 2026
One boost. 40k followers. Thousands of individual HTTP requests, each one signed, each one a fresh connection, each one saying hey to a server it talked to four milliseconds ago. Mastodon, Pixelfed and Loops do better than most here. We can still do significantly better. What if two servers just... stayed on the line? More details soon. #ActivityPub
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Aerofreak | USA WTF? @aerofreak@hessen.social · Aug 01, 2026
Replying to @dansup@mastodon.social
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