https://github.com/superseriousbusiness/gotosocial is another ActivityPub implementation in Go. It implements a full server and aims to provide Mastodon-compatible client APIs. Lots of cool work going on in this space.

I just tried using the app tutorial the other week as a newcomer to ActivityPub. I found it rather difficult to follow because it's so abstracted and it has you dive in head first doing a lot at once. And there are parts left as an exercise to the reader, which leaves gaps that makes it harder. And there are a few bugs in the tutorial code to boot. I feel like the author was very thoughtful about the whole thing, and very thorough, which I appreciate, but was too deep into it to put himself in the headspace of someone who is new to ActivityPub per se. Just my guess, of course.

I'm trying go-ap now and it's better in that I can jump in and use small parts of it, but it still could use more documentation.

I’ve heard ActivityPub has mixed reviews. Perhaps someone here with a little more expertise can answer this question.

Does ActivityPub have a batching mechanism?

Imagine you are on server A and you have 3000 followers on server B. If you create a post do 3000 messages get sent to server B? Or just one?

Can this run on a mobile device similar to Matrix’s Dendrite server running on mobile?