@ludrol@szmer.info yes, you're right about that. The silver lining here is that we're at a point where the major players' implementations are local-only, so we don't have to work around with a pre-existing implementation and ensure compatibility.
The second point is that a "cross-post" could have multiple meanings, including manually creating a new post about a link already present in multiple communities. What I'm hoping to describe is a common way that items can be cross-posted natively between instances, while hopefully preserving their reply-trees.
