Tagging @j12t@j12t.social as this might be something worth discussing in relation to activitypub.rocks

I'd add in projects like Emissary, Bonfire, or https://github.com/evanp/activitypub-bot . They can all be used to build Fediverse servers from building blocks.

I think other parts might be more piecemeal. I thing HTTP Signature libraries are awesome. https://github.com/social-web-foundation/activitystrea.ms is an AS2 library that I've used a lot, even though it's weird.

https://github.com/social-web-foundation/ap-components is a Web Components library for ActivityPub objects. Also kind of cool!

I think a lot of of building a Fediverse server -- or client! -- is implementing behaviour, which an engine like Fedify can do, but most libraries aren't going to do for you.

@julian@activitypub.space @hongminhee @mariusor

there was a brief discussion about this in the fedify matrix channel a bit ago. I think

https://dev.funkwhale.audio/funkwhale/pyfed (though not sure how active development is for this)

https://codeberg.org/bovine/bovine/ (also looks dead)

and @julian@fietkau.social is building a library for SciOp (https://blog.sciop.net/2025-12-08/sfn-and-federation#federation-plans)

@julian for the implementors of Go ActivityPub applications that need RFC9421 signatures, it's important to note that it's not FedBOX that provides the functionality, but two modules in the GoActivityPub library:

* the **client** module[1] wraps the signing of activities.
* the **auth** module[2] wraps the verification functionality.

Also for lower level use, there's the underlying module being wrapped by GoActivityPub: dadrus/httpsig [3]

[1] https://github.com/go-ap/client
[2] https://github.com/go-ap/auth
[3] https://github.com/dadrus/httpsig

Fed@hongminhee@hollo.social

@mariusor@metalhead.club makes sense. It seems like even for some frameworks, depending on libraries for trickier bits is a better idea in the long run.

@julian@fietkau.social
@tom @julian@activitypub.space
It'll be a bit, yeah, and ours is going to be a bit opinionated, I want to push for portable IDs throughout - it fits for our application and its how AP should work.

@julian@fietkau.social ah, of course @smallcircles@social.coop has a list for it. That's quite handy, thanks both!

@julian You think we should link to it from activitypub.rocks? Would be useful! File an issue?

What other AP frameworks do you know of?

This one is used in Mitra and all my other projects: https://docs.rs/apx_sdk/latest/apx_sdk/

There are many libraries, actually - the Delightful List has already been mentioned in this thread. But most of these libraries are not actively developed, or not used in any serious project.

So I've been thinking of adding a curated list of libraries to the ActivityPub developer guide.

@silverpill@mitra.social this is very cool, I didn't know about it!

I've written an ActivityStreams 2.0 vocabulary library in Rust: https://docs.rs/activitystreams-vocabulary/latest/activitystreams_vocabulary/

Don't know of any external users for it yet, though. I mainly built it for use in my other projects, would love feedback from anyone that is using it.

Nice. I'm going to keep an eye on it.

@silverpill @0xllx0 @general

Yes, indeed. I found this the other day, and have queued it up for inclusion at https://delightful.coding.social/delightful-fediverse-development

I also found the ongoing work on the #ForgeFed implementation, which is mighty interesting. Great work. Also queued up, but for inclusion at https://delightful.coding.social/delightful-fediverse-experience

@smallcircles@social.coop <img class="not-responsive emoji" src="https://activitypub.space/assets/plugins/nodebb-plugin-emoji/emoji/android/1f604.png?v=fb640c2473b" title="" /> thanks for the kind words. activityforge is still very much WIP. currently working on the web UI to get minimal user/repository interaction working. all of the backend plumbing is in place for Factory creation of user repos, user Follow, and repository Like activities. I'll put out a blog post / update here when it is ready for other folks to try out