diff --git a/docs/modernization/debt.md b/docs/modernization/debt.md
index b918db5..420ca60 100644
--- a/docs/modernization/debt.md
+++ b/docs/modernization/debt.md
@@ -18,6 +18,10 @@ agent or engineer to remove them without reconstructing context from chat.
 
 ## Recent Reductions
 
+- 2026-06-14: `DEBT-0036` was narrowed again. `Canvas::draw_merge()` now
+  routes the final-composite gate through
+  `execute_canvas_draw_merge_plane_final_composite(...)`; the plane-loop helper
+  still owns the per-plane framebuffer setup and branch dispatch.
 - 2026-06-14: `DEBT-0036` was narrowed again. `Canvas::draw_merge()` now
   routes its plane iteration and branch orchestration through
   `execute_canvas_draw_merge_plane_iteration(...)`; the canvas path still owns
diff --git a/docs/modernization/tasks.md b/docs/modernization/tasks.md
index 7c8e6ab..37162d6 100644
--- a/docs/modernization/tasks.md
+++ b/docs/modernization/tasks.md
@@ -2053,7 +2053,7 @@ ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_composito
 
 ### STR-047 - Extract Draw Merge Final Composite Gating
 
-Status: Ready
+Status: Done
 Score: no score movement
 Debt: `DEBT-0036`
 Scope: `src/canvas.cpp`, `src/legacy_canvas_draw_merge_services.h`, `tests/paint_renderer/compositor_tests.cpp`
@@ -2073,6 +2073,8 @@ Done Checks:
 - `docs/modernization/debt.md` records the reduced draw-merge final-composite
   surface.
 
+Closeout: `a16ac39d`
+
 Validation:
 
 ```powershell