Looking for #ActivityPub implementations with #RFC9421 support! 🔍

As mentioned in the Fedify announcement below, I've implemented RFC 9421 (HTTP Message Signatures) and need to verify its interoperability with other ActivityPub implementations.

The challenge is that most major ActivityPub projects don't seem to have full RFC 9421 implementations in production yet. If you're working on an ActivityPub project that:

• has implemented RFC 9421 (even in a development branch)
• is currently implementing it
• has plans to implement it soon

Please reach out! I'd love to collaborate on interoperability testing to ensure our implementations work properly with each other before merging this into #Fedify's main branch.

Any leads or connections would be greatly appreciated! 🙏

I just discovered why some of my followers from larger #Mastodon instances (like mastodon.social) would mysteriously unfollow me after a while!

A pull request was just merged in Mastodon that fixes a critical bug in their follower synchronization mechanism.

Turns out Mastodon implements the FEP-8fcf specification (Followers collection synchronization across servers), but it expected all followers to be in a single page collection. When followers were split across multiple pages, it would only see the first page and incorrectly remove all followers from subsequent pages!

This explains so much about the strange behavior I've been seeing with #Hollo and other #Fedify-based servers over the past few months. Some people would follow me from large instances, then mysteriously unfollow later without any action on their part.

Thankfully this fix has been marked for backporting, so it should appear in an upcoming patch release rather than waiting for the next major version. Great news for all of us building on #ActivityPub!

This is why I love open source—we can identify, understand, and fix these kinds of interoperability issues together. 😊

Thanks to @robin_maki, #SvelteKit integration support has been added to #Fedify! This feature will be included in Fedify 1.3.0.

Is this the time to launch a new botsinspace, based not on Mastodon code but something like #fedify, or even RSS Parrot's minimal Go codebase? A specialized service might be more affordable to operate?

But expertise is clearly needed to detect and block bandwidth-hungry scrapers and other bandits... This needs to be a team effort.

Thoughts, anyone?