Remote Inbox Architecture 1/ This, the Remote Inbox Architecture, is an architecture for a Fediverse back-end server that I think could be useful. Here is how it works — there are (at least) 2 servers involved: (1) the main back-end server, and (2) a […] [Original post on mastodon.social]

On moving an actor's content. 1/ One of the things that comes up on the Fediverse from time to time — is the ability for people to move their accounts. For example, someone started off at: ＠joeblow＠example.com But, but now wants to "move" to: ＠misterx＠host.example There is a mechanism to […]

ActivityPub being treated as JSON is a good thing. 1/ Some of us are old enough to remember RSS and blogs. Some of us are old enough to remember the absurd levels of hype that blogs and RSS attracted — similar to the modern AI hype and recent crypto hype. During that era, it felt like […]

I think ActivityPub Partial Updates don't work well with attachments or tags. Not unless there is a way to reliably just target the item in the attachments or tags you want to modify. AFAIK, there isn't. You have to download the old version of the whole […] [Original post on mastodon.social]

Internet domain name (ex: example.com) are a reasonable option for making identity on the Internet more human-friendly. But, Internet domain names are a poor choice as the base primitive for identity. At best you rent an Internet domain name. But, they can be lost if you don't pay the rent […]

In ActivityPub, these are all equivalent: "type":"Banana" "type":["Banana"] "type":{"@ID":"Banana"} "type":[{"@ID":"Banana"}] "type":{"id":"Banana"} "type":[{"id":"Banana"}] "@type":"Banana" "@type":["Banana"] "@type":{"@ID":"Banana"} "@type":[{"@ID":"Banana"}] "@type":{"id":"Banana"} […]

RE: https://mastodon.social/@reiver/112921051726027193 1/ The Fediverse would be better off if if back-end servers and front-end clients were separate projects. I have been arguing that for a while. (I know I am not the only one.) With respect to server, there are different types you might […]

@[email protected] I have a question for you... I'm seeing in Are we HS2019 yet? that Peertube and Misskey both use your package: @peertube/http-signature NodeBB currently rolls its own cavage-12 support but and I did some preliminary research into updating to the latest HTTP Signatures […]

How much Fediverse software would fail if the "to" or "cc" of an activity contained: https://WWW.W3.ORG/ns/activitystreams#Public Rather than: https://www.w3.org/ns/activitystreams#Public I.e., an upper-case Internet domain. WWW.W3.ORG versus www.w3.org #activitypub #fedidev

ActivityPub specifications don't seem to provide a way to do Idempotent POSTs to your outbox. That seems like a problem for C2S to me. Networks are unreliable. You cannot tell the difference between an unreceived request vs an unreceived response. You'll get unwanted identical duplicate […]

#hashtags don’t scale #fedidev

🌐 FediCon 2026 is coming up — and Early Bird (discounted) tickets are still available! We want FediCon to be open and accessible, which is why there is also an affordable (Reduced fare) ticket option for those who want it. Come be part of the conversations shaping the Fediverse and the future […]

I have been thinking about payments on the Fediverse (for a while). 1/ To make sure a Fediverse payment system is useful we should think in terms of a set Archetypes and each of their wants and a pains. (Product people often call "Archetypes": Personas. Marketers often call "Archetypes" […]

There is a comparison that can be made between ActivityPub and Event-Sourcing. 1/ With Event-Sourcing, your source-of-truth is an append-only series of events. Ex: USER_REGISTERED, EMAIL_ADDRESS_VERIFIED, PASSWORD_CHANGED, etc. In ActivityPub, this is similar to the inbox, outbox, etc being […]

your daily dose of json+ld, #fedidev

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. The sketched API mirrors the outbox listeners shipped in […]

It seems as if the uploadMedia ActivityPub extension does not provide a way to resume an upload that didn't previously compete. https://www.w3.org/wiki/SocialCG/ActivityPub/MediaUpload If, for example, you are working with large files (such as video files) this would matter. Because if you […]

Living up to my self-prescribed "corruptress of protocols" title, I've proposed a "handles taskforce" for the Social Web CG/WG: lists.w3.org/Archives/Pub...

What do you think about JSON-LD language maps for "preferredUsername"? I.e., preferredUsernameMap. "preferredUsernameMap": { "en": "hello", "fa": "درود", "ko": "안녕하세요 " } #fedidev #jsonld

Mastodon now has a table with size limits in its `FEDERATION.md`: https://github.com/mastodon/mastodon/blob/main/FEDERATION.md#size-limits Very good idea. I am going to do the same. #fedidev

I've lost a lot of work in @moshidon because it doesn't save my half-written post as a draft when the app is being closed, or crashes, or the OS is shutting down. Any chance of getting the apps to detect anything that triggers quitting the app, and save any text in a compose window to drafts? […]

Both Mastodon and Pixelfed seem to attach images as ActivityPub/ActivityStreams "type" = 'Document'. I would have expected "type" = 'Image'. 'Document' isn't wrong. It is valid. But, I would have expected the more specific type of 'Image'. #activitypub #activitystreams #fedidev

I think it would be better if instead of Fediverse software outputting the following for ActivityPub/ActivityStreams Notes, Articles, etc: "attributedTo": "https://mastodon.social/users/reiver", It would instead output something more like: "attributedTo": { "id":" […]

What if web-browsers could render the ActivityPub / ActivityStreams JSON-LD source-code into the document it represents? Fediverse clients can do it — why can't browsers? I previously created a small-net / small-web browser client named SpaceMonkey. It […] [Original post on mastodon.social]

Thought here … #fediforum, #fedidev, #atproto builders who are deeper in the architecture than I can get… Are there any self-hosting options out there that can literally just be the sign-in server for other services? Where’s our independent, federated “sign in with […]

Was the original intent of the ActivityPub / ActivityStreams "name" field to be a title? (It seems as if some software is using it that way.) https://www.w3.org/TR/activitystreams-vocabulary/#dfn-name #activitypub #activitystreams #fedidev

What should the file-extension for ActivityPub / ActivityStreams documents be. I.e., for application/activity+json data? I've been using .activity Ex: filename.activity (The extension cannot be .json or .jsonld if you want to be able to detect it just based on the file-extension.) What do […]

RE: https://mastodon.social/@reiver/116471973046146144 If an ActivityPub Actor is something that has an "inbox" or an "outbox" (i.e., it could have just one or both) then — Perhaps we should also be talking about "sources" and "sinks", too. Where — An ActivityPub Source is an Actor with just […]

What makes an ActivityPub Actor and Actor? I think it is probably a bad idea to just restrict it to things with 'type': "Application", "Group", "Organization", "Person", and "Service". Restricting it to just those would mean you couldn't have new actor types (and sub-types) in the future. So […]

Can an ActivityPub 'Place' also be an Actor? https://www.w3.org/TR/activitystreams-vocabulary/#dfn-place With followers, an outbox, etc. That could be useful for both real-life places, and fictional places in stories, and in video games. #activitypub #activitystreams #fedidev #fedifiction […]

It looks like some new things were added to what Mastodon returns from WebFinger. Both related to FEP-3b86 https://codeberg.org/fediverse/fep/src/branch/main/fep/3b86/fep-3b86.md #fedidev #fep_3b86 #fep3b86 #mastodon #webfinger

Should an ActivityPub 'Place' be used to represent a fictional place? https://www.w3.org/TR/activitystreams-vocabulary/#dfn-place Such as a fictional place in a story, or a video game? #activitypub #activitystreams #fedidev #fedifiction #fedigames

FEP-8b32 (Object Integrity Proofs) is getting updated: https://codeberg.org/fediverse/fep/pulls/839 I added two new requirements: - Objects identified using fragment IDs SHOULD NOT have integrity proofs. It is enough to secure the top-level document. - Verifiers SHOULD ignore proofs that use […]

1/ I have been thinking about how to create a Fediverse Game using the ActivityPub 'Question' object. I have some different ideas, but I think I want to try something simpler and quicker to make first — before attempting a magnum opus 🙂 Here is what I am thinking for a first game […]

RE: https://mastodon.social/@reiver/116460489571305159 I think Mastodon will strip image attachments from ActivityPub 'Question' objects. That is too bad. That means even if you create an 'Question' with 'Image' attachments elsewhere, you still won't see them in Mastodon (or in the Mastodon […]

RE: https://mastodon.social/@reiver/116456445062337364 If one was to create a Fediverse Game using the ActivityPub 'Question' — It would be nice if people could play it from a regular Fediverse client. But, you could also offer a game-specific client that allows for a richer game experience […]

RE: https://mastodon.social/@reiver/116456445062337364 One decision to make if one was to create a Fediverse Game using the ActivityPub 'Question' — Do you just create a bot that connect to a Fediverse server (such as a Mastodon server)? Or, do you create the Fediverse server, too? […]

Would you play a Fediverse game? Would you play a Fediverse game about Meta Humans? #activitypub #activitystreams #fedidev #fedigames #fediverse #games #videogames #MetaHumans

I think you could create a (certain type of) video game using the ActivityPub 'Question'. https://www.w3.org/TR/activitystreams-vocabulary/#dfn-question #activitiypub #activitystream #fedidev #games #videogames

Hey @[email protected], now that I'm tracking errors encountered, I've got a bit more visibility into things that normally would've just been caught and ignored. Today I received a `Delete(Object)` from Catodon associated with a user from `catodon.rocks`. Two things: 1. Its `object` […]

We're working on a new #tutorial for #Fedify: _Building a Federated Blog with Astro_! It walks you through creating a hybrid blog—static Markdown posts powered by #astro#fedify#tutorialontent collections, with #activitypub federation layered on top. By the end, your blog will be followable from Mastodon […]

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! https://coding.social/blog/grassroots-evolution/#fediverse-tomorrow #activitypub […]