and then, my plans for &latest= in #snac timelines also encompassed &earliest=, that would clip the timeline at that post, even if &show= would otherwise go past that.

this would not only enable me to easily tell where the set of posts that I haven't seen yet ends (which even with perfect memory, that I don't have, isn't very easy as boosts and likes make posts appear again).

having such explicit ranges would also enable us to hide posts that are out of the range. this could enable one to easily identify the parts of a long thread that haven't been seen yet.

I don't have thoughts on how to make the &earliest= marker user-friendly, alas.

it occurs to me that we could maintain a list of marker posts, like bookmarks but separate, so that they could be viewed, deleted, and selected as starting and ending points for timeline viewing.

CC: @grunfink@comam.es