This is an older discoery than that. Expert systems back in the day often modeled knowledge as graphs with the arrows being labeled with the specific relationship between the things.
It works because (node, edge, node) triplets then form propositions, the fundamental units of knowledge
Come to think of it, expertise researchers still do this today to make rough sketches of domains of study. The result is called a concept map.
That's just the bluesky PBLLC PDS that banned you or refused to register you.
You can create an account with any email address you want if you host your own PDS or you can find another PDS that someone else hosts that is willing to register you an account.
One participant's new account spam protection has nothing to do with the network at large being centralised
Only if you choose to use bluesky PBLLC's relays and it's super trivial to not do that. Plus you can run your own relay super cheaply.
Side note: it hasn't been called BGS for a very long time. Nowadays they are just called relays and since sync 1.1 the cost for running a relay decreased by multiple orders of magnitude.
Not that that isn’t a practical concern, but that’s not the level at which the network claims to be decentralized. Your account was banned by one participant in the hypothetical decentralized network.
Agreed, in theory all participants are equal and being banned by one participant shouldn't lock you out of a decentralized network.
In practice, the vast majority of handles (98.9% as of 2024) are under bsky.social [1]. Yes, alternative PDS providers exist, but if the default onboarding funnels everyone into one provider, and the average user doesn't even know what a PDS is, then decentralization is an implementation detail, not a user-facing reality.
ActivityPub is a terrible protocol. The protocol isn't what the specs are, and there's not even a consensus de-facto spec beyond "what Mastodon does". Atproto is a bit better.
Atproto is terrible at decentralization however, because of the model where data is stored decentrally, but accessed centrally, in big servers that need to be aware of all the data. In the ActivityPub model there isn't such a thing as "all the data" - you see what you see.
I am proud of my data, in its many media-type/lexicon feeds (browse my PDS directly at https://pdsls.dev/at://did:plc:zjbq26wybii5ojoypkso2mso), and I want people to know. I put my data on my PDS because it's good data and I believe that people contributing their "data" (sharing the world as they see it) is a democratic / open society virtue that makes the world better.
When you can meaningfully index all the data on a rpi4, I think that's awesome. That makes a lot of people scared or mad, it evokes many of the things people don't like. But it also stems from only ever having seen or known that situation when the entire stack is under corporate control and when it's a mega-corp harvesting the data. From being in captivity. Not when it's one dude bad-example.com running a link indexer for the entire site on an rpi4, and you can too. We don't know what's that like: it's never been possible. https://constellation.microcosm.blue/
There are legit reasons to have Fear Uncertainty and Doubt about atproto, and you don't have to have fun online. You are free to fuck off to less connected less online spaces if that's your bag. But I grew up wanting to be online and i still want to be online, and no service has ever actually done that before, not like this. This is dozens of times better than the next best thing as a distributed connected online system that I can be online with and that gives me the most freedom to build and use interesting neat new mini apps and tools, to be online with.
To say that like it's a bad thing, is, to me, a joke. I acknowledge your values differ, and respect your decision, but it seems so weird to not want to have fun being online, to get better at it, to make more nodes on the noospheric graph, and to made more edges between them. That still feels like the right choice for me, and it's never been tried socially, and I think it has potential to let humanity keep improving in radical ways. In contrast, renouncing the connected feels like a bad dumb move. But enjoy!! GL;HF.
I'm pretty sure the previous poster was not referring to the fact a PDS holds all of YOUR data -- mastodon servers do the very same thing.
I think they might've been referring to the fact that ATProto requires the existence of big, central relay/BGS servers, which are forced to index all the data of everyone on the network for the whole "social" aspect to work well.
That requirement makes hosting a complete, independent ATProto stack much more expensive and resource intensive than hosting an ActivityPub server, thus making ATProto harder to like, actually decentralize. (Correct me if I'm wrong, but I think currently the only independent, full-network relay is the corporate Bluesky one?)
To conflate having doubts about ATProto's design with "not liking fun" feels silly to me; it's a much less battle-tested design, doubts are warranted.
Neither Bluesky, nor other ATProto services require any of this.
RedDwarf is an example of an ATProto client that connects only with your PDS, uses Microcosm (https://www.microcosm.blue/ )'s aggregation index (they calculate aggregate counts for a variety of things with a couple of raspberry pis run off of a home fiber connection): https://reddwarf.app/
No big iron anywhere in the picture.
You give up the ability to search the network, but okay, that's already a feature that all Mastodon users sacrifice as well.
Does it work well? It sounds like it relies on scraping all follow relations in a central place (Microcosm) and then scrapes those feeds to find who replied to you.
This submission is about BlackSky doing the whole stack themselves. There are other single node app-views. So, thanks for asking, with apologies, let me correct you: you are wrong.
There are lots and lots of full network relays. A couple that run a full network relay on a < $5/mo VPS . See my other comments in this thread, https://news.ycombinator.com/item?id=47302514
If all you want is like and replies (which is the biggest huge part of the app view responsibility), Constellation has done that, is open source, and can do a full network link indexing on a raspberry pi. And which runs public endpoints you can just use, that many apps rely on.
Atproto unlike Mastodon also faces these challenges that, if you tried to do them on Mastodon, would get you screamed at and banned from instances. Fediverse broadly doesn't want you to use "their" data. You can't write search tools. As a result, Mastodon doesn't need anywhere near the complexity, because these unofficial but vociferously enforced terms-of-service disallow thorough interconnection to begin with. Makes it technically much simpler to pull off! No one is allowed to get a full fire hose. No broad app views are allowed. Dunno if this is still true, but for the longest time you wouldn't get likes or comments from someone unless they were already followed by someone on your fedi, and it's a direct result of this deliberate explicit lack of interconnection.
Those constraints greatly reduce the difficulty of scaling Mastodon: technical scaling is not a problem if you socially don't allow scale. So distributed you can't even read it.
Doubt is allowed. But from my view, Mastodon world deserves the doubt. It has stood still, barely budged. I'd love to be wrong. But it seems dominated by the one software that is Mastodon, and it doesn't seem to have a universe of interesting connected neat social softwares sprouting up left and right. The software centralization is near to total, the protocol centralization even worse. As a result, there is little distinguishing interesting novel Mastodon technology happening. The one API is deeply rooted. ActivityPub is trying to find some way to get started breaking this mono-culture & enable innovation but that's just started.
Meanwhile a casual glance at Atproto shows hundreds of amazing apps and systems and clients springing up, from amazing empassioned developers. 2025 saw a massive amount of technical decentralziation. Npmx and Eurosky setting up sizable idependent public/public-ish PDS instances, and has shown people indeed moving their core identity off BlueSky servers at some kind of scale. I forgive you for not knowing how far things have come, and I forget myself how incredibly quickly it's come together. It's still 99.99% Bluesky concentrated hosting, but it is distributed, has independent services for the full network, there is credible exit (1000 moved to npmx hosting in the past ~3 weeks), and to me the most important thing: there is technical diversity & independent exploration. There are so many devs building amazing things. That feels so so so absent on Mastodon.
That's the checkbox at the end of the Fermi great filter of interest for online social systems for me: can we permissionlessly build interesting social systems & experiences with these social protocols, or will each system have to look like a cookie cutter copy of a single instance?
> But it seems dominated by the one software that is Mastodon, and it doesn't seem to have a universe of interesting connected neat social softwares sprouting up left and right.
There's quite a few activitypub software that plays nicely with mastodon, it seems to me. Like, Wordpress has an official activitypub plugin that allows likes, replys, following and all that. Lemmy, snac, pixelfed, bookwyrm, misskey, peertube, pleroma..
There's even work on distributed/custom recommendation going on.
I think it's fair to like either atproto or activitypub (I like both!), and bluesky certainly has momentum, but I don't think one can reasonably say the other side is not moving.
The only significant motion I've seen in years in the AP space is Bridgy/A New Social and Wafrn. And while having investment and conferences isn't the only sign of life, it's notable that AP hasn't had once since the first in 2020 while AT is headed into its second building on all that started at the first.
It's neat that some websites communicate on AP, but every single one compounds the problems AT attempts to solve. You talk about software playing nice with Mastodon while AT is converging on standard lexicons and Cisco is investing in changing the nature of the relay for the better:
After everything that spawned at the first AtmosphereConf last year, I'm eager to see what happens after the one coming up. We got all this from stuff that started there, or was built on things started there.
If you wish to avoid downvotes you might benefit from stating why you think ActivityPub’s decentralization is superior. We’re in a thread discussing an example of Bluesky decentralization so it’s clearly possible.
There's no other network where anything like this is remotely even possible today, much less at such tiny costs! And it turns out it's actually computationally not hard to do so much stuff!
Imo a good time to remember the old chant: "the only war that matters is the war against imagination; all other wars are subsumed by this war." A lot of totally closed people around HN parts. Atproto is one of the new favs for the shallow hate-brigade (alongside systemd, Linux audio, k8s).
Bluesky's end user story is extremely solid. User-driven, first class moderation tooling, inside the protocol. Why do you think the difference in resources required between the two is decisive?
Your opinion sounds too strongly held to be defended this half-heartedly.
It was not designed so anyone could run their own social media for $5. It simply has a fundamentally different design that tries to solve different problems.
No need to call it a "joke." Both solutions can co-exist on vastness of the Internet.
It's more the parts they didn't make federated that hold it back in this regard.
Maybe it's good for end users but that doesn't mean much if it can fall into the same enshittification trap as the others. Also, centralised moderation. I don't want to be dependent on an American company's moderation rules.
There was an article here recently about someone who really tried setting up their own including a did:web and they ran into many problems. https://notes.nora.codes/atproto-again/
There's still many little centralised ties in bluesky and I doubt they'll ever relinquish control completely.
Personally I like nostr a lot more, it seems to be more censorship-resistant and really decentralised.
Accessibility benefits everyone.
reply