Complete M03 renderer closeout validation

RENDER.md

@@ -1503,6 +1503,20 @@ $exe = Join-Path $env:TEMP 'godot-4.6.1-openwc\Godot_v4.6.1-stable_win64.exe'
   queues and permits remain loader-owned. Synthetic factory timing is not
   private-asset visual, leak/GPU or p95/p99 evidence.
 
+## 2026-08-02 M03 Renderer Closeout
+
+- M03 preserves the M00 `High` topology and batching while enforcing four
+  CPU-only worker boundaries, fifteen main-thread finalization lanes and seven
+  explicit cache versions through the renderer closeout contract verifier.
+- Performance acceptance uses exact-cache paired M00/M03 captures plus a second
+  ten-second window. A metric must exceed its unchanged 10% budget in both
+  protocols to be a repeatable regression; the closeout result is `0/84`.
+- Native M2 startup no longer copies an ArrayMesh that is immediately discarded.
+  It creates an instance-local mesh, reapplies shared Materials and performs one
+  phased rebuild before attachment; `_ready()` is idempotent afterward.
+- Checkpoint evidence is asset-backed but is not an original-client pixel-parity
+  claim. Long traversal and original-client approval remain release gates.
+
 ## Practical Rule For Future Work
 
 If something improves quality but creates visible hitch, it is not done. Move it to bake/cache/background work, split finalization over frames, or prewarm it before the player can see it.