Those are proxies specific to that service, no? AT posts aren’t webpages, there is no canonical HTTP URL for an AT post, nor is the post an HTML document. Bluesky happens to provide an HTTP browser-based front-end, which is not part of the AT protocol.
It may seem inconsequential to some, but AT is fundamentally hostile to the web. The goal of AT is to move syndication and content off the web to another network. No. I’m done with that.
What do you mean? Both of these things are trivial.
Here is a link to my most recent post on Bluesky: https://bsky.app/profile/steveklabnik.com/post/3lztkahefs225
You can sign into bsky.app (or deer.social, or anisota.net, or...) in your browser and post just fine.