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Christine Lemmer-Webber

I have actually critiqued ActivityPub and the fediverse a lot! I have kind of never stopped critiquing it, ever since the spec was released. There's a lot that can be improved!

I have even gotten criticism from AT LEAST ONE ActivityPub spec author for critiquing AP-as-deployed but I do anyway

136 comments
Christine Lemmer-Webber replied to Christine

Actually something that is funny about ActivityPub is that there's "ActivityPub the spec", which I think is pretty solid for the most part, and "ActivityPub-as-deployed"

Many of the critiques I'm about to lay out we left holes in the spec for which I hoped would be filled with the right answers

Christine Lemmer-Webber replied to Christine

One thing we have already discussed so, before I will say anything else, I will repeat: content addressing is really good, and I'd like to see it happen in ActivityPub, and it's *possible to do*, I even wrote a demo of it gitlab.com/spritely/golem/blob

Bluesky does the right thing here, AP should too

Christine Lemmer-Webber replied to Christine

Content addressing is important. It should not matter where content "lives". It should be able to live anywhere.

A server should be able to go down, and content should survive.

Go content addressing!

Christine Lemmer-Webber replied to Christine

Actually with this and several other things I am going to bring up, I actually made sure there was space to do things right: there was a push to make ActivityPub "https-only"

I pushed back on that, I didn't want that requirement, and it was exactly for this reason: enabling content addressing

Christine Lemmer-Webber replied to Christine

This isn't the only time I left a critique of ActivityPub-as-Deployed as opposed to ActivityPub-as-it-could-be: see also OCapPub, which critiques the anti-abuse tools of AP as inadequate and leading to "the nation-state'ification of the fediverse" gitlab.com/spritely/ocappub/bl

Oh, and ocaps!!!

Christine Lemmer-Webber replied to Christine

ActivityPub left giant holes in the spec around two things which sound the same but which are not the same: Authentication and Authorization

Trying to mix these two, you accidentally get ACLs, and then you get confused deputies and ambient authority, plagues of the security world

Christine Lemmer-Webber replied to Christine

Anyway, if you know *anything* about me, you know I am a big fan of capability security (ocaps) and that's the foundation of our work over at @spritely

But we will come back to ocaps in a second because it turns out OCapPub is not the only time I proposed AP + ocaps!

Colin the Mathmo replied to Christine

There is value in invoking the charting 'bot thusly:

Calling @Chartodon spine ...

@cwebber @spritely

Christine Lemmer-Webber replied to Christine

The other time I wrote about ActivityPub + ocaps was in a proposal to, yes, Twitter's Bluesky process in 2020 with Jay Graber titled... "ActivityPub + OCaps"! gitlab.com/-/snippets/2535398

I think that document laid out all the right ideas for *the fediverse* (not saying bsky, the fediverse)

Christine Lemmer-Webber replied to Christine

Now I want to be clear here that I *don't* think that proposal was necessarily the right one for Bluesky, and I *do* think Jay Graber *was* the right person to lead Bluesky

What I wanted to do required a lot more research, and we have done that over at @spritely instead

Christine Lemmer-Webber replied to Christine

The reason I bring up the proposal here is that I think it has all the right analysis of *what the fediverse should do*, if it was going to rise to the challenge of fulfilling its true potential

So let me lay out what the things in that proposal were:

Christine Lemmer-Webber replied to Christine

Here is your recipe for making the "Correct Fediverse IMO (TM)":

- Integrate ocaps, which is possible because actor model + ocaps compose
- Content addressed storage!
- Decentralized identity (notice the *y*, I did not say DIDs) on top of ~mutable CAS storage
- Petname system UX

(cotd...)

Christine Lemmer-Webber replied to Christine

(cotd ...)

- Better anti-spam / anti-harassment using OCapPub ideas
- Improved privacy with E2EE ("encrypted p2p" even a better goal)

Whew! An improved fediverse?

"Uh, Christine, this sounds like a lot, do you think the fediverse can take this on?"

Christine Lemmer-Webber replied to Christine

Spec-wise in ActivityPub, I think it's possible. The ecosystem, as deployed? I think the ecosystem can and will only do part of it, if we really get everyone excited, maybe the content addressed storage and decentralized identity parts, in which case the fediverse will also survive nodes going down

Christine Lemmer-Webber replied to Christine

The ocap stuff, I tried getting fediverse implementers excited about this and tbh, it's pretty hard to design into a Ruby on Rails or Django style framework and mindset. Backporting the right designs to existing systems is a real challenge.

Especially ocaps need to go bottom-up.

Christine Lemmer-Webber replied to Christine

For this reason, @spritely's tech looks like it's very focused on computer science'y low-level BS, but that's actually because it's *too hard to build the systems I want right now on top of current technology*, we need stronger foundations

But people have to build for today too

Christine Lemmer-Webber replied to Christine

Let's leave the ocap stuff to the side for now, then. Let's focus on what Bluesky and the fediverse have to learn from each other.

- The fediverse should adopt content-addressed storage and decentralized identity
- Bluesky should adopt real, actual federation and decentralization

Christine Lemmer-Webber replied to Christine

For this reason @blaine says of both ActivityPub done right and Bluesky done right, "they're the same picture" (The Office meme goes here, yes)

To a large degree, I think @blaine is right

Christine Lemmer-Webber replied to Christine

Of course, adapting an existing system as deployed isn't easy.

I will say though that I think if Bluesky were to become *actually decentralized* it would look a lot like ActivityPub in terms of having directed messaging. This will also introduce similar challenges around eg replies, etc.

Christine Lemmer-Webber replied to Christine

To the end of the fediverse, perhaps I sound bitter, "they didn't adopt ActivityPub the way *I* saw it!"

The truth is that Mastodon didn't, but Mastodon also saved ActivityPub. It then painted a vision of the future that wasn't, at least, what Jessica Tallon and I expected of it. But it saved AP.

Christine Lemmer-Webber replied to Christine

The fediverse and Bluesky, at great effort, could learn a lot from each other in the immediate term.

In the longer term, neither is implementing the ocap vision I think is critical for the big vision, and in a way, I think maybe neither can be easily rearchitected to achieve it. Well, not yet.

Christine Lemmer-Webber replied to Christine

When I laid out the ideas of OCapPub to various fediverse developers, the response was "this sounds cool but I have *no idea* how to retrofit a Rails/Django app for this kind of actor-oriented design".

And they were right.

Remember when I said Conway's Law flows in both directions?

Christine Lemmer-Webber replied to Christine

Conway's Law says that a technical architecture reflects the social structure under which it was built. But the reverse is also true. The social structures *we can have* are made possible by the affordances of the tools we have available.

"Tech problems/social problems": false dichotomy.

Christine Lemmer-Webber replied to Christine

It's for that reason that @spritely, while aiming for a *socially collaborative* revolution, is first focusing on a *technical* revolution.

It's too hard to build massively, securely collaborative tools right now. With Spritely's tools, p2p ocap secure tech is the *default output*.

Christine Lemmer-Webber replied to Christine

Remember when I said that IMO @jay.bsky.team is the right person to lead Bluesky and that I am sympathetic with many design decisions of Bluesky (even if critical of them for being non-decentralized)?

Bluesky is building what they can for a scale big objective. The tech flows from goals.

Christine Lemmer-Webber replied to Christine

So too does the social structure flow from the tech. It does on Bluesky, and it does on the fediverse.

I won't elaborate further on this, I actually would like you to pause and think about it. In which ways are tech and social systems bidirectional, here and otherwise? It's important.

Christine Lemmer-Webber replied to Christine

The vision laid out for the fediverse, both independently in my writings and even in Jay Graber and I's joint proposal... well, it's a big lift.

@spritely would like to see if we can retrofit our version onto ActivityPub. Time will tell if that's a separate thing.

Christine Lemmer-Webber replied to Christine

And perhaps this is all my *massive* Cassandra complex speaking. I won't deny that I have one, for better or worse

Still, despite all I have said about both Bluesky and the fediverse technically, it is because I want a hopeful direction for all of us. Secure collaboration. More important than ever.

Christine Lemmer-Webber replied to Christine

Let's take another tea break. (And another bathroom break. This teacup is massive.) We're getting close to done, I promise. Just two sections left, they're both much shorter.

Then I can finally brave reading my notifications.

Maybe.

== TEA BREAK THE THIRD: BEVERAGE TRIFORCE ==

Preston Maness ☭ replied to Christine

@cwebber I've bookmarked more posts today than I have in weeks. Will definitely be reading over all of this.

Christine Lemmer-Webber replied to Christine

Hello, I am back again. Did you miss me? I still am not reading notifications.

Help I started writing this summary at 11am and it is now 6pm here I have wasted a whole day of work

But I have tea, and I also flossed my teeth, and it is time to resume this thread. If you are here, you know why.

Emelia 👸🏻 replied to Christine

@cwebber that sounds like such a Gossip Girl way to return to the conversation 😂

Christine Lemmer-Webber replied to Christine

Before we go any further, earlier I mentioned the US House of Representatives, and here I am giving a MASSIVE content warning for transphobia

But @evangreer is the coolest fucking person for standing up to Rep. Mace at the Project Libery summit fightforthefuture.org/news/202

Christine Lemmer-Webber replied to Christine

What I am trying to say is I don't have many heroes but @evangreer is absolutely a heroine of mine

You should donate to @fight they are some of the only people doing sensible advocacy against terrible internet laws

Also fuck TERFs

But anyway

Christine Lemmer-Webber replied to Christine

Also you have reached it: the third secret egg

You have now collected the egg triforce and can defeat Gender Ganon

If you want to

The power was in you all along

But let's continue.

Tully replied to Christine

@cwebber but another egg was forged in secret…

Christine Lemmer-Webber replied to Christine

It's time, we have reached the second to last section: "Preparing for the organization as a future adversary."

I love this one because I love that phrase, and the best part is that the Bluesky team came up with it, "the organization is a future adversary". It's genuinely good and self reflective

Susanna replied to Christine

@cwebber @evangreer Evan Greer is awesome!

lizard appreciator replied to Christine

@cwebber “i still am not reading notifications” 👑👑👑

L. Rhodes replied to Christine

@cwebber I've often framed for myself as: "Tech encodes social relations." Both in the sense that the social relations made possible by tech are constrained by its code, and that code is conditioned by the social relations around its production.

djpeluca replied to Christine

@cwebber I think descentralizad moderation is also something to consider. What do you think about it?

nen replied to Christine

@cwebber Oooh, E2E encryption for fediverse! 😻 I've been thinking about that sort of things recently and I was wondering what experts have thought about them. It would be so nice to have a smoother gradient available between public and private visibility, instead of the current binary choice of either being almost completely isolated and unseen by new people or fully open to content scrapers. And there would be some extra protection against privacy leaking bugs, too.

flaeky pancako replied to Christine

@cwebber can you go into more detail about petnames or as I like to call it local names ..don't you think people will talk at the idea of a non global namespace for a global network ? Is there something with petnames that we've all missed ?

What do you think about the idea that naming in general is just a simplistic version of a search engine ?

Central Illumination Agency replied to Christine

People complain about threading on Mastodon not working right, and @cwebber is just out there like

Kye Fox replied to Christine

@cwebber Authentication (who's this jerk)

Authorization (does this jerk belong here)

Fluchtkapsel (Abonnement) replied to Christine

@cwebber At some point I'd really love to get an explanation on content addressed storage. At the moment I imagine something like a cross of git, IPFS and BitTorrent.

em replied to Christine

@cwebber how can content addressing work without cryptographically signing posts or just allowing everyone to impersonate everyone else

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