fix(M00): release GUI capture render resources

Work-Package: M00-QAR-GUI-RID-SHUTDOWN-001
Agent: sindo-main-codex
Tests: render baseline dry-run; runtime cache shutdown; comparator self-test; coordination and documentation gates
Fidelity: shutdown-only ownership fix; no visual or Blizzlike335 behavior change

docs/M00_FINAL_PAIRED_EVIDENCE.md

@@ -62,7 +62,9 @@ The reports demonstrate current differences and do not claim `1:1`. Camera calib
 
 ## Operational risks
 
-The full GUI visual capture completed and wrote its report, but Godot still emitted renderer RID/resource leak diagnostics at exit, including leaked material, shader, texture, instance and rendering-device RIDs. The earlier anonymous headless `RefCounted` leak is fixed; these GUI renderer allocations are a distinct known risk. They do not invalidate the written images or metrics, but must remain recorded rather than hidden.
+A follow-up shutdown ownership fix removed the GUI renderer leaks found by the final visual capture. Before the fix, the focused animated-M2 checkpoint retained 6 mesh, 6 material, 4 shader, 6 texture, 6 instance and associated RenderingDevice RIDs, for 30 resources in use. After the fix, both the focused 8-second capture and a seven-checkpoint single-pass capture completed without Node, resource or RID leak diagnostics.
+
+Godot can still emit a timing-dependent ObjectDB warning for one or more anonymous `RefCounted` objects whose reported reference count is already zero. The warning has no retained Node, renderer resource or RID ownership in the verified captures. It remains recorded as an engine-teardown diagnostic rather than being hidden, but it is distinct from the resolved GUI renderer leak.
 
 ## Integrator decision checklist
 
@@ -70,5 +72,5 @@ The full GUI visual capture completed and wrote its report, but Godot still emit
 - Animated M2: build-12340 native motion observed in two phases; synthetic/real placement mismatch explicitly classified.
 - Sky transition: build-12340 19:00 evidence present with approximate paired camera and human-approved composition.
 - Renderer visual differences: registered as gaps, not parity claims.
-- GUI renderer RID/resource diagnostics: accepted as a tracked risk or assigned a follow-up blocker.
+- GUI renderer RID/resource diagnostics: resolved by explicit shutdown ownership and covered by a headless regression verifier; the residual zero-reference `RefCounted` engine-teardown warning remains tracked separately.
 - Target status, target Evidence and `OPENWC_TARGET_DONE` marker: integrator-only actions.

docs/modules/world-renderer.md

@@ -143,7 +143,8 @@ sequenceDiagram
     Stream->>Render: evict outside retention range
     Stream->>Worker: shutdown: wait for WorkerThreadPool tasks
     Stream->>Stream: shutdown: finish registered ResourceLoader requests
-    Stream->>Render: clear queues, nodes, caches and RIDs
+    Stream->>Render: clear queues and owned tree nodes/RIDs
+    Stream->>Stream: free detached prototypes and release resource caches
 ```
 
 ## Ownership, threading and resources
@@ -153,6 +154,8 @@ sequenceDiagram
 - Parsed/grouped results передаются обратно через guarded result queues.
 - Mesh/material/node/RID finalization выполняется main thread и ограничивается exported budgets.
 - Shutdown/map switch обязан дождаться WorkerThreadPool jobs и зарегистрированных threaded ResourceLoader requests до очистки очередей, nodes, caches и RIDs.
+- Parented streamed nodes остаются owned by SceneTree during shutdown; detached M2/WMO prototype caches are explicitly `free()`d after asynchronous work drains.
+- A temporary liquid root with no generated child geometry is explicitly freed by `ADTBuilder` instead of being returned or abandoned.
 - Cache resources считаются immutable после публикации.
 
 ## Errors, cancellation and recovery
@@ -165,7 +168,7 @@ sequenceDiagram
 | Main-thread hitch | Named section timing | Frame spike, work remains queued | `HITCH` log | Lower budget/fix finalize path |
 | D3D12 descriptor exhaustion | Rendering backend error | Render failure/fallback backend | Godot error + baseline report | Dedup resources/fix settings |
 | Teleport/map change | Focus/session transition | Old jobs become stale | Target/session generation | Cancel/drop stale results |
-| Shutdown leak | Godot leak/RID diagnostics | Resource retained | Verbose shutdown report | Drain owned worker and resource requests before clearing registries |
+| Shutdown leak | Godot leak/RID diagnostics | Resource retained | Verbose shutdown report + cache shutdown verifier | Drain requests, preserve tree ownership, then free detached prototypes and clear resource caches |
 
 ## Configuration and capabilities
 
@@ -235,7 +238,7 @@ Exact exported settings and cache versions remain documented in [`../../RENDER.m
 - Joint Goldshire pitch/FOV refinement had no human-approved optimum: full-frame error preferred grass-heavy FOV 62/pitch -25, while FOV 38/pitch -10 better matched building scale. Landmark/region scoring is required before calibration.
 - Common-region scoring `[300,100,1400,650]` moved Goldshire's numeric optimum to FOV 38/yaw 10/pitch -15, but human inspection still found an oversized/cropped facade; semantic landmarks or masks remain required.
 - Final paired audit compared fourteen cold/warm images for seven private build 12340 references with zero missing pairs; mean error ranges `0.066893..0.176955`. Animated-M2 native motion is observed across two original-client phases, but its real Lakeshire placement differs from the synthetic Goldshire probe. Sky-transition evidence uses the checkpoint map position/time with manually approved approximate framing.
-- D3D12 descriptor issues remain; the capture-path anonymous `RefCounted` shutdown leak is regression-covered by a clean verbose dry-run, while other RID/resource diagnostics still require independent evidence.
+- D3D12 descriptor issues remain. Explicit shutdown ownership removes the GUI capture's Node/resource/RID leaks in focused and seven-checkpoint runs; a timing-dependent ObjectDB warning for anonymous zero-reference `RefCounted` objects remains as a separate engine-teardown diagnostic.
 - M2/WMO/material/particle/ribbon/portal parity incomplete.
 - Public API is mostly exported configuration rather than stable contracts.
 
@@ -253,6 +256,7 @@ Exact exported settings and cache versions remain documented in [`../../RENDER.m
 | `src/tools/build_*cache.gd`, `src/tools/bake_*cache.gd` | Offline cache generation |
 | `tools/run_render_baseline.ps1` | Unified M00 baseline runner |
 | `src/tools/compare_render_checkpoints.gd` | Offline JPG/PNG paired-image perceptual metrics and JSON pass/fail report |
+| `src/tools/verify_render_runtime_cache_shutdown.gd` | Headless ownership regression for detached runtime prototypes, resource caches and empty liquid roots |
 | `src/tools/capture_render_checkpoints.gd` | Deterministic no-roll checkpoint camera, performance and visual capture |
 | `tools/sweep_render_checkpoint_camera_pose.ps1` | Offline yaw/pitch capture grid and paired-error ranking |
 | `src/tools/verify_render_coordinate_calibration.gd` | Build 12340 camera-coordinate golden point round-trip diagnostic |