FWIW, you can setup IndieAuth — on its own or as part of the IndieWeb plugin suite for Wordpress. It may not be quite what you're looking for, but it's a step in the right direction?
haverholm
I think I understand the self hosted identity server part, and authenticating with it on different sites. But what is the federated element you're talking about? What would that instance federate, and with whom?
If we're moving into a single sign-on for several federated accounts, that's cool. People have been asking for that for ages! But the identity provider itself wouldn't (need to) be federated for that to work, right?
Oh, do check out the Indieweb. It probably predates the (term) fediverse, and the ideas that underpin it are well worth looking into!
This is the honest headline we deserve.
Usually I recommend KISS or Kvaesitso, but with the customisation you ask for, maybe Lawnchair?
All of tumblr is being moved to Wordpress software, and Automatic confirmed last month that it will also include federating posts.
It's not just in the UK, the global Overton window has taken a slide to the right unfortunately 😞
Ironic that he's with the Labour party, and will readily send... how many thousands of civil servants into unemployment? Somebody clearly didn't do the maths.
If you're on Android, try Tusky. It supports multiple accounts but focuses on Mastodon and compatible platforms.
It doesn't handle Pixelfed very well (although that can be down to Pixelfed's ongoing development), and may not support all of Friendica's features, but you can definitely sign in from Tusky.
First usable advice from an "AI".
I don't know how you define "most" or "core" here, but it's certainly true that mastodon.social and its ~400K users remain federated with Threads.
A lot of instances did block or limit them though, and I'm not going to sit down and calculate which side is in majority 🤷
The fact that so much training data is scraped without consent makes a lot of the popular LLMs unethical already in their development, yeah. And that in turn makes using the models unethical.