I've started putting together a list of #fediverse apps, focused on implementations of #ActivityPub, documenting their status and what tech stack they're (being) built with: ethercalc.org/fediverse-stacks

This is a publicly editable doc, so would appreciate corrections/additions, and feedback especially from fediverse devs, but also from instance admins and users:

- What app/implementation/stack did you try?
- Pros/cons you encountered
- What stack & libraries would you choose if starting today?

PS. We've been talking with @bhaugen and others about the need for a generic agent-centric #ActivityPub server, so that instead of signing up to a bunch of different servers, a user could have their indentity and data all in one place, and all the apps they use (clients, but if necessary server-side "plugins" as well) would interact with the activity/objects types that they support.

What do you think?

cc @cwebber @aaronpk @deadsuperhero @aral

@mayel The fastest path to build a performant server is using the scaffolding already available:
github.com/go-fed/activity

See here progress about feature set, what's implemented already and what's still missing:
github.com/go-fed/activity/iss

@h That's definitely what I'd rather do. Have you played around with that library? Opinions?

@mayel You've probably talked to @cj before of the go-fed project.
I think the code is promising and it contains some scaffolding that makes the prospect of writing a proper server far less challenging than it would be the case if you started from scratch with say... C++.

@h @mayel I'm happy to answer any specific questions, including discussing limitations of the current library. I've tried to be honestly thorough in the GitHub issues, although please ignore the GitHub milestones, I need to redo those.

A basic tutorial and the library's documentation are also available at go-fed.org

@cj @h

I am very interested if/how the library supports extensions, as that's a key requirement for a couple projects for which I'm looking for the best implementation approach, and your docs say that "ActivityStreams vocabulary supports extensions beyond the Core and Extended types. However, this will be outside the scope of this tutorial"

@mayel @h Gotcha. go-fed could do it, but involves a few hours of time to make 2 code changes.

1) In the tool used to auto-generate the ActivityStreams implementation.

2) The go-fed/activity/pub library also would need to pass-through any new Activities defined in this way.

I'm gonna go ahead and capture both in github issues.

What kinds of extensions are you looking at, specifically?

@cj @h

One project is moodle.com/moodlenet for which we need extensions related to educational resource metadata.

Ther other is opencoopecosystem.net for which we'll need extensions related to economic activities, adapting valueflo.ws/ to ActivityStreans.

Follow

@mayel @h Thanks! I am aware of ValueFlows thanks to @bhaugen, and this is the first I've heard of the Moodle one. So I will need to look into that one and keep both on my radar.

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