Cross-domain + registration commenting UX

[kevinmarks]

If you're registered to that Known instance, you see a comment form. If you're not you don't.
However, if I use the bookmarklet to reply to another site using Known, it shows up as a comment.
This is also great.
If you're not registered, there is no cue on the post at all (there is a register link top right that qualifies as hidden).

A more common comment flow is just-in-time authentication - this is how disqus and wordpress comments work - you see the comment form, then at the point of posting it you get the register/auth flow.

OpenID was invented with this in mind - you enter your blog URL and it can auth you; indieauth could work the same way, and/or there could be a register link if the site allows it.

Or, if we're feeling ambitious, the register UX could allow an indieauth flow (that naturally includes other Known instances).

This gives a natural division for comment moderation - you can have defaults for registered people and a mod queue for externals.

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