Share retained stroke live pass helper

docs/modernization/debt.md

@@ -18,6 +18,12 @@ agent or engineer to remove them without reconstructing context from chat.
 
 ## Recent Reductions
 
+- 2026-06-13: DEBT-0036 was narrowed again. `Canvas::stroke_draw` main and
+  dual live-pass dirty semantics now route through
+  `execute_legacy_canvas_stroke_live_pass_with_dirty_tracking(...)` in
+  `legacy_canvas_stroke_execution_services.h`; shader timing, sampler/texture
+  binding, framebuffer ownership, pad execution, and final OpenGL draw remain
+  retained in `Canvas`.
 - 2026-06-13: DEBT-0036 was narrowed again. `NodeStrokePreview` final
   composite sampler/input binding and slot intent now route through one local
   preview helper; mixer execution, per-sample stroke callbacks, framebuffer

docs/modernization/roadmap.md

@@ -3093,6 +3093,11 @@ Results:
   dirty tracking now share one retained stroke execution helper surface, while
   shader timing, sampler/texture binding, framebuffer ownership, pad execution,
   and final OpenGL draw ordering remain in the legacy Canvas path.
+- `Canvas::stroke_draw` main and dual live-pass dirty semantics now share one
+  retained helper around the face loop, current/dual dirty accumulation, and
+  dual-pass dirty preservation, while shader timing, sampler/texture binding,
+  framebuffer ownership, pad execution, and final OpenGL draw ordering remain
+  in the legacy Canvas path.
 - `Canvas::stroke_draw` pad-pass destination bind/copy/unbind ordering now
   shares the retained stroke execution helper callback surface, while shader
   setup, pad color selection, framebuffer ownership, and final OpenGL draw