irisandClaude Fable 5.1
c3cfc67bb3
take_counters gains a fourth counter, text shapes, bumped in Painter::render_text -- which TextView::render only reaches on a cache miss, so it counts shapes and not requests. A draw counter cannot stand in for it in either direction: a widget can be redrawn without re-shaping (the layout is memoized by width) and re-shaped without any extra draw, and re-shaping is the whole thing the per-block transcript row exists to avoid. With it, a_delta_into_a_long_reply_redraws_the_same_widgets_as_a_short_one asserts the number docs/DECISIONS.md's 2026-09-06 entry actually claims: one delta into a 100-paragraph reply shapes exactly one text layout, the same as into a one-paragraph one. Before the split that was necessarily O(message), since the reply was one buffer. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>