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https://fietkau.social/users/julian posted on Apr 6, 2026 18:42
In reply to: https://activitypub.space/post/1742

@julian@activitypub.space As I understand the migration path, it's like

1. Able to receive RFC 9421 in addition to draft-cavage
2. Able to send RFC 9421 in addition to draft-cavage
3. Send RFC 9421 by default, but be able to fall back to draft-cavage if needed

So by “can't handle” I meant step 1. 🙂 Although the unspoken step 4 is to remove draft-cavage support once everyone else has taken step 1, I'm ultimately also wondering when we'll get there.

https://fietkau.social/users/julian/statuses/116359231424348338

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https://cosocial.ca/users/evan posted on Apr 6, 2026 18:46
In reply to: https://fietkau.social/users/julian/statuses/116359231424348338

@julian@fietkau.social @julian@activitypub.space Honestly, I think it's going to be a while.

I think the term for step 3 is "double knocking", and it's called out in the HTTP Signature report for the Social CG:

https://swicg.github.io/activitypub-http-signature/

https://cosocial.ca/users/evan/statuses/116359244354505014

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https://fietkau.social/users/julian posted on Apr 6, 2026 18:04

RE: https://mastodon.social/@bagder/116359048796181736

Could be potentially nice for fediverse server testing, as more implementations make the jump to final RFC 9421 HTTP signatures.

On the flip side, ever more complex curl invocations (here: Accept header plus signature fields plus key file, presumably) suggest use of more specialized CLI tools, such as provided by @fedify, or at least scripts/aliases.

Speaking of RFC 9421, which notable fediverse implementations can't handle it yet? Anyone keeping track?

#ActivityPub #FediDev #RFC9421

https://fietkau.social/users/julian/statuses/116359079973668821

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https://gabboman.xyz/fediverse/blog/gabboman posted on Apr 6, 2026 18:51
In reply to: https://fietkau.social/users/julian/statuses/116359256770187966

@fedify@hollo.social @julian@fietkau.social

excelent

https://gabboman.xyz/fediverse/post/a9236dc1-0cbf-4e74-b54a-aae27190b7f6

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https://cosocial.ca/users/evan posted on Apr 6, 2026 19:14
In reply to: https://gabboman.xyz/fediverse/post/98595eb6-95eb-455e-b140-eab1ca961e94

@gabboman @fedify @julian I'm adding it to activitypub-bot this week. I'll send a link when it's up.

https://cosocial.ca/users/evan/statuses/116359354139111276

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https://piefed.social/u/rimu posted on Apr 4, 2026 20:00
In reply to: https://activitypub.space/post/1726

I plan to scale horizontally with all those old PCs that won’t run windows 11.

https://piefed.social/comment/10826235

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https://social.vir.group/users/newsgroup posted on Apr 6, 2026 10:13
In reply to: https://activitypub.space/post/1726

@julian love that you're channeling this into optimism for software breakthroughs—that linux boot time memory is such a perfect example of the magic that can happen.

https://social.vir.group/users/newsgroup/statuses/116357227284081638

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https://cosocial.ca/users/evan posted on Apr 4, 2026 22:24
In reply to: https://activitypub.space/post/1730

@julian ah, right! I meant, many Fediverse servers don't do a good job with caching headers, but you can use some of the data to guess if there have been changes. Caching headers are better though!

https://cosocial.ca/users/evan/statuses/116348780360092235

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https://piefed.social/u/rimu posted on Apr 4, 2026 22:21
In reply to: https://activitypub.space/post/1735

For servers, yes. Not so easy for desktop usage!

https://piefed.social/comment/10827837

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https://mastodon.social/users/lumiworx posted on Apr 4, 2026 18:00
In reply to: https://activitypub.space/post/1727

@thisismissem

"I don't think that would be accurate at all, in terms of what I presume most might think."

That was in reference to Elena's comment about being viewed as a team player... and nothing else.

As for "my memories failing me...", I was recalling from memory what I read years ago and recollected as Eugen's comments on why he had chosen to work on ActivityPub and Mastodon. I'm not a member of the board, nor do I have access to info on those events.

https://mastodon.social/users/lumiworx/statuses/116347741403585881

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https://phpc.social/users/linc posted on Apr 4, 2026 16:39
In reply to: https://mastodon.social/users/benpate/statuses/116347404634020947

@benpate One of the reasons we're supporting NodeBB is their adoption of ActivityPub, and @julian is leading efforts around forum-based AP implementations if you want to follow it.

I think interconnectedness is a double-edge sword, so my own work in the community space right now is focused on private community organizing with only very selective feed-based connections.

https://phpc.social/users/linc/statuses/116347420231558862

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https://cosocial.ca/users/evan posted on Apr 4, 2026 14:06
In reply to: https://activitypub.space/post/1722

@julian hmmm. With a reverse chron collection you can do pretty well with `totalItems` and the first item on the first page.

If there were net items added or deleted, `totalItems` will be different.

If the same number of items were added and deleted, the most recent item will be different.

So you can check synch with a couple of hits.

https://cosocial.ca/users/evan/statuses/116346819897602642

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https://cosocial.ca/users/evan posted on Apr 4, 2026 01:05
In reply to: https://rmendes.net/bookmarks/2026/04/02/discover-more-of-the-fediverse

@rick I think the problem is with the signatures. @hongminhee gave me a bug report and I'm working on it right now. I'll let you know when I have it live and tested. Thanks for your persistence!

https://cosocial.ca/users/evan/statuses/116343749383642605