Plan stroke commit sequencing

docs/modernization/roadmap.md

@@ -2974,6 +2974,12 @@ Results:
   `pp_paint_renderer` stroke-feedback plan to decide whether framebuffer fetch
   supplies destination color or the legacy OpenGL path must copy the target
   texture before drawing.
+- Canvas stroke commit ordering now has a tested `pp_paint_renderer`
+  `CanvasStrokeCommitSequencePlan` for history readback, dirty-state update,
+  scratch copies, erase/composite draw selection, dilate, and texture slot
+  roles. A retained commit adapter skeleton consumes that semantic sequence,
+  while the live Canvas body still owns history/layer mutation and OpenGL
+  execution until the next wiring slice.
 - Canvas thumbnail layer blending now uses the same canvas destination-feedback
   plan for framebuffer-fetch versus texture-copy decisions; the thumbnail draw
   itself still executes through retained OpenGL canvas code under DEBT-0036.