POSSE means "post one your own site, syndicate everywhere," and I'm closing in on that thanks to Friendica, which is similar to (and compatible with) Mastodon. I'm posting this from Friendica, but it is also being posted to Bluesky and my website.

This is new for me, so let's see how it goes, but my hope is that it works well, even for longer posts (as Bluesky has fairly elegant pagination using comments).