In version 4.3, Mastodon introduced OpenGraph creator tags to link to an author's Fediverse account from within a post.

I had implemented it on my website a while back. However, because my instance wasn't using a version that supported it, it didn't show up on my instance.

Since upgrading to 4.3.1, I can now see my posts making use of the creator tag feature.

[Image: Screenshot of Mastodon Post with Author Profile Link]

As you can see from the original post, implementing it was relatively trivial. Another win for open protocols and standards.