Hi @pfefferle
re: "fediverse:creator" - it seems to default to the AP author, OK. But as I've implemented it manually, pointing to my Mastodon profile, I might get conflicts sooner or later...
<meta property="fediverse:creator" name="fediverse:creator" content="cybeardjm@www.didiermary.fr" />
vs
<meta name="fediverse:creator" content="cybeardjm@masto.ai" />