I would like to give an update on "federation" on Bluesky
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Doing my part on gaygeek. To get more users, we need central, sadly. It's just beyond older non tech people to figure out. Not impossible though. I put mastodon.lol on my mom's phone...
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The biggest movement on this front has come from the community formerly known as Black Twitter, which now has complete, viable alternative dupes of the whole stack:
https://blacksky.community/profile/did:plc:w4xbfzo7kqfes5zb7r6qv3rw/post/3lyq3wh2i5k2u
This makes intuitive sense to me! My first question, looking at ATP, is "why do free dev for this protocol, controlled by one corporation, when Fediverse is right there and is more complete?". But the black dev community, from everything I saw, tried to adopt Fediverse *first* and basically got harassed off.
@mcc "tried to adopt Fediverse first and basically got harassed off."
what does this mean, exactly? you don't have to interact with any other instance on the whole stack if you don't want to. what I'm guessing is this actually means people tried to signup for mastodon.social which is a shithole and then that got conflated with the whole fediverse -
@mcc (if this is too off topic just ignore!)
I noticed that Blacksky asks for a birth date when you make a new account.
Bluesky didn't use to ask. No idea what they do now, but I would not have made an account with them if they required a birth date.
I'm sure people make up dates but I was still surprised. I'm guessing this is related to age verification laws? I don't know much about them.
Have any Fediverse servers started to ask for a birth date when a new account is created?
@ahimsa_pdx I don't know. I didn't make an account, apparently.
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@mcc There's also https://plc.directory/, the
did:plc:database, also run by Bluesky.("
plc" stands for "placeholder", because they aspire to figure out something blockchain decentralized later.)I think Bluesky can inconvenience people at best, or hijack their accounts at worst, especially if they were using a Bluesky PDS and Bluesky has all the keys. But I don't know/remember the exact implications.
@mnordhoff yes, the plc is another really frustrating thing
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@mcc I don't know :) Maybe the Rust one from blacksky is less resource intensive?
@fabrice yeah, I dunno. I haven't noticed a load problem from the typescript implementation. I don't have a very data oriented operation over here tho
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And that's why I say, TLDR:
- I am legitimately excited about the work being done by Blacksky Algorithms! I am using their frontend and happy with it.
- Northsky is an interesting development to watch
- If you're on a Bluesky PDS, I recommend migrating off with one of these tools https://bsky.app/profile/did:plc:ii5jchdzlmcojjw4dqczcgkh/post/3lyt6t6qfa22u
- Everything Sucks. A LOT of things would have to change at a social level for *any* entity other than Bluesky to have power or independence in the ATP ecosystem. I still don't trust Bluesky.
As an update since posting the above thread I have received replies from two people, one saying I am underestimating the level of stack coverage Blacksky has, another saying I am overestimating it. Also a "AppView" and "Client" are different. Sorry.
The stack is just so tall! There are *so many* layers in this protocol's model. And it seems like every single one of them is an opportunity to introduce censorship
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@lrhodes @esoteric_programmer @alter_kaker oh God so I could have sworn the early documents I read talked about the Big Data Server and then suddenly that's gone and they talk about the "relay" but is that why I'm confused? The BDS got split in two, into the relay and appview? :(
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I would like to give an update on "federation" on Bluesky.
My expectation was it was unlikely we'd ever see this happen because "federation" on ATProto means basically reproducing the entirety of the Bluesky software stack. In old Big Data terms, on ActivityPub your instance is a "horizontal shard" of the network; ATProto forces full DB replicas only.
Still, we're seeing movement on this front, which I'd split into two categories:
1. Your fault (you reading this)
2. Aaron Rodericks's fault@mcc Look, Bluesky has some nice advantages over the fediverse, mainly that it's not confusing at all because it gets to the point of just being old Twitter.
Federation is not their strong point and will never be, whether we like it or not, if you want federation and multiple communities, Activitypub is by far the best option.
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@lrhodes @esoteric_programmer @alter_kaker oh God so I could have sworn the early documents I read talked about the Big Data Server and then suddenly that's gone and they talk about the "relay" but is that why I'm confused? The BDS got split in two, into the relay and appview? :(
@mcc @lrhodes @esoteric_programmer @alter_kaker
Feel like the best 'simple' explanation for AT Protocol that makes some sense of the different components is this document from Kuba @mackuba
https://mackuba.eu/2025/08/20/introduction-to-atproto/
Kuba is also a great resource here on the Fedi for all things AT Protocol. He may be able to clear up any misunderstandings.
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What I saw happen when Black Twitter came to Fediverse is attempts to build community resources— like shared cross-instance blocklist infrastructure— get demonized by white queers as being anti-queer (because they, personally, wound up moderated— due to, as far as I saw, entirely real racism). I saw multiple projects shut down or hobbled by this and good people driven off fedi. I don't know if any devs from that era are involved in the new Bluesky efforts. But the Bluesky efforts *are* thriving.
@mcc thank you for posting about this. Did a quick stop over to Black sky and found a lot of the people I miss here and followed on Twitter over there. Thank you! My social media morning routine now feels a lot better again.
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@esoteric_programmer so this is all within my ability. But what about the rest of the stack? To my understanding, the PDS and view? As @mcc says things have to change in a social level but the first step is more nodes...
@mcc @alter_kaker @esoteric_programmer I think the key point is: "Every Bluesky replica is, probably without realizing it, making a bet that Bluesky has already plateaued." This is a worthwhile experiment, as long as you can pull the plug at a moment's notice and lose nothing. -
@esoteric_programmer @alter_kaker @mcc This is curious to me, because it looks like he's running a relay as an actual relay, just passing along data, which would explain why it's relatively low-cost. But the Relay described by the Bluesky white paper was more than just a relay— it was a replacement (or rebrand) for the earlier Big Data Server that was supposed to not only pass data, but also store and index it all for the network. And I can't tell if those other, more expensive functions got offloaded to other services, or if there are two types of relays in the infrastructure, or something else.
@lrhodes @mcc @alter_kaker @esoteric_programmer My understanding is that relays have a "replay since timestamp X" functionality, so that consumers that go down for a while can get back up and running. Originally relays by definition had to support any X back to the beginning of time, leading to absurd storage costs. Today they are allowed to have a much shorter window, meaning in effect the storage cost is insignificant and it's the network cost that dominates. Unless I'm mistaken, the canonical store of a user's posting history is and always was the PDS. -
@alter_kaker I'm not the person to ask. I would join the Bluesky API Touchers discord (yes, it's really named that) and ask there.
Blacksky has all their software on GitHub (they are using a mix of original Bluesky software and their own stuff) but not instructions on how to deploy it as a whole stack.
@mcc @alter_kaker "I would join the Bluesky API Touchers discord"
But... why are they not using... no OK never mind.
I'm so glad for this thread! I've had a bazillion questions about AT but nowhere to ask them. I really think there should be an "other protocols" channel on activitypub.space though. This is not "Technical discussion about ActivityPub-related topics" and sooner or later someone's gonna get angry at us.
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@swetland that is pretty much the intention of the ATmosphere's design. The vision of this "composable moderation" is to allow independent "labeller" or filter services be able to process the firehose of relay traffic.
I do find the atmosphere approach interesting but its "service oriented" design seems to fight against the nature (or original intentions at least) of the host-centric internet we all try to navigate.
I think that, if reasonableness prevails, ATproto and ActivityPub will end up cross pollinating ideas and resembling each other more. Oddly enough they are both hobbled by the same problem to some degree...the dominance of a single entity hampering the true potential each has (Bluesky and Mastodon or at least Gargron's Big Instances).
One thing is pretty certain at least... The dominant platform within the fediverse driving certain communities away was a more significant factor in why Bluesky gained traction than any technical design decisions either network made.
@msh @swetland @mcc @gbargoud I think it is good to keep looking at fediverse's decentralisation too but of course there's a huge difference between the degrees to which these two are controlled by a single entity.
Why do you say this was a significant factor in driving communities away from the fediverse? It sounds surprising to me.
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@mcc @aeva I continue to be annoyed that whenever anyone brings up legitimate gripes with how bsky is operated, the staff claim "open protocol", "federation", and "user freedom", when the reality is that with only a handful of alternate towers that represent maybe a single digit percentage of users at best, for all intents and purposes it is not federated in any way that brings meaningful choice to the average user.
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@alter_kaker @mcc hmm, apparently not that much knowledge is required, and the cost dropped significantly, I still don't trust any of it though
@esoteric_programmer @alter_kaker @mcc as I understand it the cost of a relay has gone down because you can run it without keeping full account of the message history for all time and instead restrict what you have to a time-window.
Raises the question of whether that's good enough if we want real alternatives to the official company infra though.
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@lrhodes @esoteric_programmer @alter_kaker oh God so I could have sworn the early documents I read talked about the Big Data Server and then suddenly that's gone and they talk about the "relay" but is that why I'm confused? The BDS got split in two, into the relay and appview? :(
@mcc @lrhodes @esoteric_programmer @alter_kaker I think they just straight up renamed the "Big Graph Server" or BGS to Relay.
They announced it in Nov 2023 here: https://github.com/bluesky-social/atproto/discussions/1847
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And that's why I say, TLDR:
- I am legitimately excited about the work being done by Blacksky Algorithms! I am using their frontend and happy with it.
- Northsky is an interesting development to watch
- If you're on a Bluesky PDS, I recommend migrating off with one of these tools https://bsky.app/profile/did:plc:ii5jchdzlmcojjw4dqczcgkh/post/3lyt6t6qfa22u
- Everything Sucks. A LOT of things would have to change at a social level for *any* entity other than Bluesky to have power or independence in the ATP ecosystem. I still don't trust Bluesky.
@mcc what exactly is the benefit of migrating to a non bluesky PDS? I understand being on an entirely different vertical stack like Blacksky or Northsky but what does being on a PDS give you? Aren't you still (almost) entirely at bluesky's mercy?
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@mcc sad stuff 😢 Thanks for the history lesson and analysis.
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@mcc Yeah. I don't see how that's sustainable. I'm not sure it's even sustainable for Bluesky.
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@lrhodes Depends on how you do it I imagine. But remember that's several terabytes for the like what, three years or something Bluesky has been running. We will expect it to grow endlessly, and we should expect the growth to grow endlessly as Bluesky becomes more popular.
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@mcc What's the monthly cost on maintaining several terabytes of data in perpetuity?
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@game sì, ci sono anche soluzioni (purtroppo non previste da Mastodon) in cui alcuni utenti (i minori) accedono solo alle risorse locali o a un bouquet selezionato di istanze esterne, mentre altri possono utilizzare la federazione. Ma non sono di facile implementazione
@mapto @informapirata
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t yet
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@mcc I read your thread only now, and I wanted to thank you for posting all that. I am no fan of Bluesky and their one-instance federation, but I have a phony account there, to follow how it's going for them. Threads like yours fill in additional context. 🙏
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Bonjour ! @Neko0001
