Pens: grey the turn, indigo model requests, red retries, teal tools, amber waiting on youThe router: each second goes to one rod, in the order waiting on you › retry › model › tool › hook › permission checkArrow keys step through the spans; Space pauses the recorderOne synthetic turn of Claude Code, 47.8 s long. Each pen draws one kind of span as the paper runs left, so the record reads like the app's waterfall: the turn on top, then model requests, their retry attempts, the tool call, its permission wait and its execution. Underneath, every moment of the turn is given to exactly one category, the first of waiting on you › retry › model › tool › hook › permission check that is running, and to Other when none is. The four rods are the story view's time bar: waiting on you 17.8 s, claude thinking 16.7 s, running tools 11.9 s, other 1.5 s.