Wrap stroke mix shell bundle

docs/modernization/debt.md

@@ -18,6 +18,10 @@ agent or engineer to remove them without reconstructing context from chat.
 
 ## Recent Reductions
 
+- 2026-06-13: `LATER-003` was narrowed again. `Canvas::stroke_draw_mix()` now
+  routes the combined setup and request bundle through
+  `make_legacy_canvas_stroke_mix_pass_shell(...)`; the live path still owns
+  the concrete framebuffer bind and GL capability toggles.
 - 2026-06-13: `LATER-003` was narrowed again. `Canvas::stroke_draw_mix()` now
   routes the retained mix-pass shell through
   `execute_legacy_canvas_stroke_mix_pass_shell(...)`; the live path still owns