Context compaction drawn as a meandering river: live turns are points on one curving channel, and a compacted run of turns necks off into a reopenable, re-injectable oxbow lake sitting 12px off the channel.
Use when an agent conversation where compaction has already happened and the user needs to see which run of turns was folded away and get it back, since each compacted run necks off the channel into a labelled oxbow that reopens and re-injects; pick meter-context-window instead when the question is how full the window is right now rather than what was dropped from it, or context-prompt-shims when the user is composing what goes into the window in the first place.