Merge work package M03-RND-FACADE-001

Work-Package: M03-RND-FACADE-001
Agent: sindo-main-codex
Tests: facade/focus/coordinate/manifest contracts, dry-run, coordination and documentation gates
Fidelity: no renderer target, budget, cache or visual behavior change

RENDER.md

@@ -25,7 +25,8 @@ Paired run 2026-07-11 подтвердил крупный coordinate/placement g
 
 ## Основные файлы
 
-- `src/scenes/streaming/streaming_world_loader.gd` - главный runtime streamer мира.
+- `src/render/world_render_facade.gd` - стабильная граница runtime/tools для focus и metrics.
+- `src/scenes/streaming/streaming_world_loader.gd` - внутренний runtime streamer мира.
 - `src/scenes/streaming/eastern_kingdoms_streaming.tscn` - текущая сцена для проверки Azeroth/Eastern Kingdoms.
 - `addons/mpq_extractor/loaders/adt_builder.gd` - сборка ADT terrain, control splat материалов и MH2O liquids.
 - `addons/mpq_extractor/loaders/m2_builder.gd` - сборка статического M2 mesh/material.
@@ -873,6 +874,21 @@ $exe = Join-Path $env:TEMP 'godot-4.6.1-openwc\Godot_v4.6.1-stable_win64.exe'
 - This closes a coordinate/renderer integration criterion only. It does not
   claim TrinityCore row equivalence or visual parity with the original client.
 
+## 2026-07-15 WorldRenderFacade First Seam
+
+- Runtime streaming scenes, checkpoint capture and renderer probes now submit
+  typed focus through `WorldRenderFacade`; those callers no longer call the
+  monolithic streamer's focus methods or configure its focus source directly.
+- Baseline capture reads queue/cache/activity counts through
+  `renderer_metrics_snapshot()`. The facade returns a deep copy, so diagnostics
+  cannot mutate renderer-owned state.
+- `StreamingWorldLoader` remains the internal implementation and still owns all
+  queues, tasks, caches, nodes and RIDs. The facade adds no parallel state or
+  replacement scheduler.
+- This package does not alter targets, budgets, cache versions, placement,
+  visibility, materials or animation. Environment, entity visuals and ground
+  query remain explicit follow-up facade contracts in M03.
+
 ## 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.

coordination/claims/M03-RND-FACADE-001.md

@@ -0,0 +1,115 @@
+# M03-RND-FACADE-001 — Renderer facade first seam
+
+<!-- OPENWC_CLAIM:M03-RND-FACADE-001:sindo-main-codex:2026-07-17 -->
+
+## Ownership
+
+- Target: M03
+- Program: RND
+- Owner/Agent ID: sindo-main-codex
+- Branch: `work/sindo-main-codex/m03-renderer-facade`
+- Lease expires UTC: 2026-07-17
+- Integrator: M03 milestone integrator
+
+## Outcome
+
+Introduce `WorldRenderFacade` as the only runtime/tool caller surface for typed
+streaming focus updates and read-only renderer metrics, while retaining
+`StreamingWorldLoader` as the unchanged internal implementation.
+
+## Non-goals
+
+- Extract the pure target planner or budget scheduler in this package.
+- Add environment or entity-presentation commands before their contracts exist.
+- Replace the M02 `TerrainQuery` gameplay boundary in this package.
+- Change streaming radii, queues, cache formats, visuals or quality presets.
+- Mark M03 complete or edit its checklist/Evidence.
+
+## Paths
+
+- Exclusive: `src/render/world_render_facade.gd`,
+  `src/tools/verify_world_render_facade.gd`, this claim
+- Shared/hotspots: both runtime streaming scenes, three renderer capture/probe
+  tools, `src/tools/verify_streaming_focus.gd`, `docs/modules/world-renderer.md`,
+  `docs/modules/README.md`, `RENDER.md`
+- Generated/ignored: local `.godot`, native build outputs, caches and proprietary
+  renderer corpus
+
+## Contracts and data
+
+- Public API: `set_streaming_focus`, `refresh_streaming_focus`,
+  `renderer_metrics_snapshot`
+- Scene adapter: explicit `streaming_focus_source_path` owned by the facade
+- Internal implementation seam: `streaming_world_loader_path`; callers must not
+  read streamer queues or call its methods directly
+- Schema/cache/coordinate contracts: unchanged
+- Consumers: runtime scenes, capture tool and renderer probes
+
+## Dependencies
+
+- Requires: M01 `StreamingFocus` and merged M02 closeout on master `4f566b1`
+- Blocks: environment/entity/ground facade contracts and planner extraction
+- External state: none; contract verification uses a test double
+
+## Verification
+
+- Commands: dedicated facade verifier, streaming-focus regression, renderer
+  baseline manifest/dry-run, coordinate boundary and repository gates
+- Fixtures: typed focus, source Node3D and read-only metrics test double
+- Fidelity evidence: no renderer configuration, planner, queue, placement,
+  visibility, material, animation or cache behavior changes
+- Performance budget: one source position sample per process frame; target
+  recomputation remains throttled inside the existing streamer
+
+## Documentation deliverables
+
+- Inline public API docs for facade properties and methods
+- Updated world-renderer module specification
+- Updated data-flow, sequence and dependency diagrams
+- Updated source map/status and renderer notes
+
+## Simplicity and naming
+
+- Important names: `WorldRenderFacade`, `renderer_metrics_snapshot`
+- Simplest approach: one small Node adapter delegating to the existing streamer
+- Rejected complexity: service container, generic command bus, streamer rewrite
+  or duplicate queue/cache state
+- Unavoidable complexity: scene-relative source and implementation paths are
+  resolved on the main thread with explicit diagnostics
+- Measured optimization evidence: not applicable; behavior-preserving seam
+
+## Status
+
+- State: ready-for-review
+- Done: introduced the facade, migrated two runtime scenes and three renderer
+  tools, added regression coverage and updated renderer documentation
+- Next: M03 integrator reviews and merges `3d528e3`
+- Blocked by:
+
+<!-- OPENWC_HANDOFF:READY:M03-RND-FACADE-001:3d528e3 -->
+
+## Handoff
+
+- Commit: `3d528e3`
+- Results: `WorldRenderFacade` is the runtime/tool surface for typed focus and
+  detached metrics; the existing streamer remains the sole owner of queues,
+  caches, tasks, nodes and RIDs.
+- Verification: facade `delegation=3 runtime_scenes=2 tools=3`; streaming focus
+  `contract=1 runtime_scenes=2 capture_tools=3`; coordinate boundary
+  `files=105 native_boundary=1 oracle=1 consumers=5 classifier_cases=6`;
+  render manifest `checkpoints=7 coverage=7 caches=7`; seven-checkpoint headless
+  dry-run; coordination/documentation/diff gates passed.
+- Fidelity: no changes to renderer target calculation, budgets, queue order,
+  cache versions, placement, visibility, materials or animation. The dry-run
+  retained all seven checkpoint plans. No build-12340 parity claim is added.
+- External/local inputs: ignored native DLL and generated ADT resource scripts
+  were copied from master only to run the worktree smoke. Proprietary extracted
+  ADT and character GLB data were unavailable, producing the expected dry-run
+  degraded-data diagnostics.
+- Remaining risks: environment, entity visuals and ground query are not yet
+  facade contracts; streamer exported configuration remains transitional scene
+  composition; focus-source sampling adds one small main-thread adapter step per
+  process frame while target refresh remains streamer-throttled.
+- Documentation updated: inline facade API, `docs/modules/world-renderer.md`
+  public API/inputs/outputs/data-flow/sequence/ownership/recovery/status/source
+  map, and `RENDER.md` file map plus implementation note.

docs/modules/world-renderer.md

@@ -5,9 +5,9 @@
 | Field | Value |
 |---|---|
 | Status | Partial |
-| Target/work package | M00 baseline; `M01-RND-STREAMING-FOCUS-001`; `M01-QAR-SERVER-SPAWN-RENDERER-001`; декомпозиция M02–M03 |
+| Target/work package | M00 baseline; `M01-RND-STREAMING-FOCUS-001`; `M01-QAR-SERVER-SPAWN-RENDERER-001`; `M03-RND-FACADE-001` |
 | Owners | Renderer workstream / milestone integrator |
-| Last verified | Worktree `work/sindo-main-codex/m01-server-spawn-renderer`, 2026-07-13 |
+| Last verified | Worktree `work/sindo-main-codex/m03-renderer-facade`, 2026-07-15 |
 | Profiles/capabilities | `Performance`, `Balanced`, `High`, `Custom`; Blizzlike fidelity incomplete |
 
 ## Purpose
@@ -32,7 +32,8 @@ flowchart LR
     SpawnFixture[Pinned server spawn fixture] --> SpawnManifest[Spawn render manifest]
     SpawnManifest --> Capture
     Adapter --> Focus
-    Focus --> Loader[StreamingWorldLoader]
+    Focus --> Facade[WorldRenderFacade]
+    Facade --> Loader[StreamingWorldLoader internal]
     Assets[Extracted WDT/ADT/M2/WMO/BLP] --> Native[Native loaders]
     Cache[Baked terrain/M2/WMO caches] --> Loader
     Native --> Parsed[Parsed tile/model data]
@@ -60,36 +61,43 @@ Forbidden dependencies:
 
 ## Public API
 
-Текущая система ещё не имеет стабильного facade. Фактический integration surface — `StreamingWorldLoader` Node3D и exported properties. M03 должен заменить этот surface на `WorldRenderFacade`.
+Runtime, capture and probe callers use `WorldRenderFacade` for focus and metrics.
+`StreamingWorldLoader` remains the internal scene implementation while later M03
+packages add environment, entity-visual and ground-query contracts.
 
 | Symbol | Kind | Purpose | Thread/lifetime | Errors |
 |---|---|---|---|---|
 | `map_name` | Exported property | WDT/map directory name | Set before world load | Missing WDT produces diagnostic/empty world |
 | `extracted_dir` | Exported property | Root of legally extracted client data | Session lifetime | Missing files reported per loader path |
 | `StreamingFocus` | Immutable value | Typed Godot-basis position without Node/Camera dependency | Any thread; caller-owned reference | Null position is a caller contract violation |
-| `streaming_focus_source_path` | Exported adapter property | Samples any explicit `Node3D` source into `StreamingFocus` | Main thread, scene lifetime | Missing/wrong node warns once and retains prior focus |
-| `set_streaming_focus` | Public method | Accepts focus from app/editor/tool composition | Main thread/session | Null focus is ignored by refresh until replaced |
-| `refresh_streaming_focus` | Public method | Samples configured source and applies refresh thresholds | Main thread/session | Returns `false` when no valid focus exists |
+| `WorldRenderFacade.streaming_focus_source_path` | Exported adapter property | Samples any explicit `Node3D` source into `StreamingFocus` | Main thread, scene lifetime | Missing/wrong node warns once and retains prior focus |
+| `WorldRenderFacade.set_streaming_focus` | Public method | Accepts focus from app/editor/tool composition | Main thread/session | Missing internal renderer is diagnosed; no state is duplicated |
+| `WorldRenderFacade.refresh_streaming_focus` | Public method | Samples configured source and delegates existing refresh thresholds | Main thread/session | Returns `false` when dependency/focus is unavailable |
+| `WorldRenderFacade.renderer_metrics_snapshot` | Public method | Returns a deep-detached queue/cache/activity snapshot | Main thread/caller-owned result | Missing/invalid implementation result returns empty snapshot with diagnostic |
+| `WorldRenderFacade.streaming_world_loader_path` | Internal adapter property | Resolves the existing implementation without exposing it to consumers | Main thread, scene lifetime | Missing method/path produces one diagnostic until recovery |
 | `camera_path` | Exported property | Camera used only by optional automatic overview positioning | Main thread, scene lifetime | Missing camera skips automatic positioning |
 | `quality_preset` | Exported property | Applies renderer budgets/radii | Before/at runtime depending property | Invalid combination should be diagnosed |
 | `runtime_stats_enabled` | Exported property | Enables periodic performance snapshot | Runtime mutable | Logging overhead only |
 | `hitch_profiler_enabled` | Exported property | Enables named hitch sections | Runtime mutable | Logging overhead only |
 
-Публичным contract не считаются внутренние dictionaries, queues, job records и generated node names.
+Публичным contract не считаются `StreamingWorldLoader` methods/properties,
+внутренние dictionaries, queues, job records и generated node names. Scene-owned
+loader configuration remains transitional composition data, not a caller API.
 
 ## Inputs and outputs
 
 | Direction | Contract/data | Producer | Consumer | Ownership | Thread/lifetime |
 |---|---|---|---|---|---|
-| Input | `StreamingFocus` | Player/spectator/editor/capture adapter | `StreamingWorldLoader` | Immutable caller value | Main thread/session |
-| Input | Focus-source `NodePath` | Runtime/test scene composition | Loader source adapter | Scene-owned node, sampled position | Main thread/scene lifetime |
+| Input | `StreamingFocus` | Player/spectator/editor/capture adapter | `WorldRenderFacade` | Immutable caller value | Main thread/session |
+| Input | Focus-source `NodePath` | Runtime/test scene composition | `WorldRenderFacade` source adapter | Scene-owned node, sampled position | Main thread/scene lifetime |
 | Input | Map/configuration | Scene/app/editor | `StreamingWorldLoader` | Caller config, copied/read | Main thread/session |
 | Input | WDT/ADT/M2/WMO/BLP bytes | Extracted asset repository | Native loaders/builders | Loader result owns parsed data | Worker or controlled load |
 | Input | Baked resources | Cache build tools | Streamer/builders | Shared immutable resource/cache entry | Session/cache lifetime |
 | Test input | Server-spawn render manifest | Coordinate fixture/verifier | Checkpoint capture tool | Repository-owned diagnostic data | Test-process lifetime |
 | Output | Desired tile/detail operations | Streaming planner inside loader | Finalize queues | Loader-owned | Cross-frame |
 | Output | Terrain/M2/WMO/liquid instances | Loader/builders | Godot world/renderer | Loader/world owner | Main-thread attach |
-| Output | Metrics/diagnostics | Hitch/stat instrumentation | Logs/baseline tools | Immutable records | Periodic/frame |
+| Output | Detached renderer metrics | `WorldRenderFacade` | Capture/baseline tools | Caller-owned deep copy | On demand |
+| Output | Logs/diagnostics | Hitch/stat instrumentation | Logs/baseline tools | Immutable records | Periodic/frame |
 | Test output | Diagnostic spawn marker and cold/warm PNGs | Checkpoint capture tool | Human/integrator review | SceneTree marker; `user://` files | One capture process |
 
 Side effects:
@@ -104,7 +112,7 @@ Side effects:
 
 ```mermaid
 flowchart TD
-    P[Player/spectator Node3D] --> A[Explicit scene adapter]
+    PlayerSource[Player/spectator Node3D] --> A[Explicit scene adapter]
     C[Capture camera] --> A
     SF[Pinned server spawn] --> SM[Validated spawn manifest]
     SM --> C
@@ -112,11 +120,12 @@ flowchart TD
     E[Editor viewport] --> EA[Editor adapter]
     A --> F[StreamingFocus]
     EA --> F
-    F --> T[Compute desired ADT tiles]
+    F --> RF[WorldRenderFacade]
+    RF --> T[StreamingWorldLoader target refresh]
     WDT[WDT tile catalog] --> T
     T --> Q[Tile load queue]
-    Q --> P[Worker parse/cache load]
-    P --> R[Result queues]
+    Q --> Parse[Worker parse/cache load]
+    Parse --> R[Result queues]
     R --> B[Per-frame budget scheduler]
     B --> Terrain[Terrain attach/upgrade]
     B --> M2[M2 group/MultiMesh attach]
@@ -155,12 +164,14 @@ stateDiagram-v2
 sequenceDiagram
     participant Source as Player/Editor/Capture source
     participant Focus as StreamingFocus adapter
-    participant Stream as StreamingWorldLoader
+    participant Facade as WorldRenderFacade
+    participant Stream as StreamingWorldLoader internal
     participant Worker as Worker task
     participant Budget as Main-thread budget
     participant Render as SceneTree/RenderingServer
     Source->>Focus: sample explicit Godot position
-    Focus->>Stream: set/refresh typed focus
+    Focus->>Facade: set/refresh typed focus
+    Facade->>Stream: delegate focus and refresh
     Stream->>Stream: desired tiles and priorities
     Stream->>Worker: parse/load tile and detail data
     Worker-->>Stream: immutable result
@@ -176,6 +187,8 @@ sequenceDiagram
 ## Ownership, threading and resources
 
 - `StreamingWorldLoader` владеет tile states, queues, task registries, active world instances и render caches session scope.
+- `WorldRenderFacade` owns only scene-relative adapter paths. It does not own the
+  streamer, focus source, returned metrics, queues, caches, nodes or RIDs.
 - Focus producers own the immutable `StreamingFocus` reference; the loader retains
   the latest reference and converts it to `Vector3` only inside the render boundary.
 - Worker tasks не должны менять SceneTree и shared Resource concurrently.
@@ -192,6 +205,8 @@ sequenceDiagram
 |---|---|---|---|---|
 | Missing WDT/ADT | File/catalog check | Tile/map unavailable | Loader warning/error | Fix extraction/profile, reload |
 | Missing focus source | Explicit NodePath resolution | Retain current streamed content and prior valid focus | One warning until source recovers | Fix composition path or call `set_streaming_focus` |
+| Missing renderer implementation | Facade path/method validation | Focus/metrics call fails without mutation | One facade diagnostic until recovery | Fix scene composition path/implementation |
+| Invalid metrics result | Facade return-type validation | Return empty caller snapshot | Facade error | Restore `Dictionary` implementation contract |
 | No focus supplied | Refresh contract | No target recomputation; queues continue draining | `refresh_streaming_focus()` returns `false` | Supply player/editor/capture focus |
 | Cache version mismatch | Required format constant | Reject stale cache/fallback | Version diagnostic | Rebuild matching cache |
 | Worker failure | Task result/empty data | Skip/degrade affected asset | Queue/task warning | Retry/rebuild source |
@@ -225,6 +240,8 @@ Exact exported settings and cache versions remain documented in [`../../RENDER.m
 ## Diagnostics and observability
 
 - Logs: `HITCH`, `PERF`, `TERRAIN_QUALITY`, `SKY_LIGHT`, `SKYBOX_MODEL`.
+- API snapshot: `WorldRenderFacade.renderer_metrics_snapshot()` returns detached
+  queue/cache/activity counts without exposing mutable renderer state.
 - Metrics: queue depths, active tiles/assets, named finalize times, frame percentiles and max hitch.
 - Debug views: render checkpoint scenes/captures; future streaming/LOD/portal overlays.
 - Correlation IDs: currently mostly tile/path keys; target architecture adds session/job IDs.
@@ -257,7 +274,7 @@ Exact exported settings and cache versions remain documented in [`../../RENDER.m
 | Character presentation | Prototype | Character creator/player experiment | Full customization/equipment states |
 | Camera-independent streaming focus | Implemented | Typed contract, two player-focused runtime scenes and three explicitly camera-focused diagnostic tools | Multi-focus/direction/velocity belong to planner extraction |
 | Golden server-spawn visualization | Implemented | Pinned AzerothCore fixture, validated renderer manifest and diagnostic origin-marker capture at ADT `(32,48)`/MCNK `(3,12)` | No TrinityCore row or original-client visual-parity claim |
-| Stable renderer facade | Planned | M03 | Current caller uses monolithic Node API |
+| Stable renderer facade | Partial | `M03-RND-FACADE-001` contract/runtime/tool regressions | Focus and metrics migrated; environment/entity visuals/ground query remain |
 
 ## Known gaps and risks
 
@@ -283,9 +300,11 @@ Exact exported settings and cache versions remain documented in [`../../RENDER.m
 
 | Path | Responsibility |
 |---|---|
+| `src/render/world_render_facade.gd` | Stable caller boundary for typed focus and detached renderer metrics |
 | `src/scenes/streaming/streaming_world_loader.gd` | Current runtime orchestration, queues, caches and attachment |
 | `src/domain/streaming/streaming_focus.gd` | Immutable camera-independent streaming position contract |
 | `src/tools/verify_streaming_focus.gd` | Headless contract, dependency and runtime/tool wiring regression |
+| `src/tools/verify_world_render_facade.gd` | Facade delegation, snapshot isolation and consumer wiring regression |
 | `addons/mpq_extractor/loaders/adt_builder.gd` | Terrain/material/liquid construction |
 | `addons/mpq_extractor/loaders/m2_builder.gd` | Static M2 mesh/material construction |
 | `addons/mpq_extractor/loaders/m2_native_animated_builder.gd` | Native animated M2 experiment |

src/render/world_render_facade.gd

@@ -0,0 +1,110 @@
+@tool
+class_name WorldRenderFacade
+extends Node
+
+## Stable main-thread boundary between runtime/tool callers and the monolithic
+## streaming renderer. The facade owns no queues, caches, nodes or RIDs.
+
+const GODOT_WORLD_POSITION_SCRIPT := preload("res://src/domain/coordinates/godot_world_position.gd")
+const STREAMING_FOCUS_SCRIPT := preload("res://src/domain/streaming/streaming_focus.gd")
+
+## Internal renderer implementation resolved relative to this node.
+## The referenced node remains owned by its scene parent.
+@export var streaming_world_loader_path: NodePath = NodePath("..")
+
+## Optional explicit Node3D source sampled in Godot world coordinates.
+## Runtime scenes use the player; capture and probe tools replace it with their camera.
+@export var streaming_focus_source_path: NodePath
+
+var _streaming_world_loader: Node
+var _missing_loader_reported := false
+var _missing_focus_source_reported := false
+
+
+func _ready() -> void:
+	_resolve_streaming_world_loader()
+	set_process(streaming_focus_source_path != NodePath())
+	if streaming_focus_source_path != NodePath():
+		# Child nodes become ready before their parent StreamingWorldLoader. Only
+		# publish the initial focus here; the loader applies it after initialization.
+		_capture_streaming_focus_from_source()
+
+
+func _process(_delta_seconds: float) -> void:
+	_capture_streaming_focus_from_source()
+
+
+## Replaces the renderer focus. The immutable value remains caller-owned; the
+## internal streamer retains the reference for its next throttled refresh.
+func set_streaming_focus(streaming_focus: StreamingFocus) -> void:
+	var loader := _resolve_streaming_world_loader()
+	if loader == null:
+		return
+	loader.call("set_streaming_focus", streaming_focus)
+
+
+## Samples the configured source and requests target refresh from the internal
+## streamer. Returns false when either dependency or a valid focus is unavailable.
+func refresh_streaming_focus(force: bool = false) -> bool:
+	_capture_streaming_focus_from_source()
+	var loader := _resolve_streaming_world_loader()
+	if loader == null:
+		return false
+	return bool(loader.call("refresh_streaming_focus", force))
+
+
+## Returns a detached read-only metrics snapshot for diagnostics and baselines.
+## Mutating the returned Dictionary cannot mutate renderer-owned state.
+func renderer_metrics_snapshot() -> Dictionary:
+	var loader := _resolve_streaming_world_loader()
+	if loader == null:
+		return {}
+	var metrics_variant = loader.call("render_baseline_snapshot")
+	if not (metrics_variant is Dictionary):
+		push_error("WorldRenderFacade received a non-Dictionary renderer metrics snapshot.")
+		return {}
+	return (metrics_variant as Dictionary).duplicate(true)
+
+
+func _capture_streaming_focus_from_source() -> void:
+	if streaming_focus_source_path == NodePath():
+		return
+	var focus_source := get_node_or_null(streaming_focus_source_path) as Node3D
+	if focus_source == null:
+		if not _missing_focus_source_reported:
+			push_warning("WorldRenderFacade focus source is missing or is not Node3D: %s" % streaming_focus_source_path)
+			_missing_focus_source_reported = true
+		return
+
+	_missing_focus_source_reported = false
+	var godot_position: Vector3 = focus_source.global_position
+	var typed_world_position = GODOT_WORLD_POSITION_SCRIPT.new(
+		godot_position.x,
+		godot_position.y,
+		godot_position.z
+	)
+	set_streaming_focus(STREAMING_FOCUS_SCRIPT.new(typed_world_position))
+
+
+func _resolve_streaming_world_loader() -> Node:
+	if is_instance_valid(_streaming_world_loader):
+		return _streaming_world_loader
+	var candidate := get_node_or_null(streaming_world_loader_path)
+	if candidate == null:
+		if not _missing_loader_reported:
+			push_error("WorldRenderFacade cannot resolve StreamingWorldLoader at %s" % streaming_world_loader_path)
+			_missing_loader_reported = true
+		return null
+	for required_method in [
+		&"set_streaming_focus",
+		&"refresh_streaming_focus",
+		&"render_baseline_snapshot",
+	]:
+		if not candidate.has_method(required_method):
+			if not _missing_loader_reported:
+				push_error("WorldRenderFacade renderer implementation lacks %s" % required_method)
+				_missing_loader_reported = true
+			return null
+	_streaming_world_loader = candidate
+	_missing_loader_reported = false
+	return _streaming_world_loader

src/render/world_render_facade.gd.uid

@@ -0,0 +1 @@
+uid://sxn3ai2ic18r

src/scenes/streaming/eastern_kingdoms_streaming.tscn

@@ -6,6 +6,7 @@
 [ext_resource type="Script" uid="uid://cq60al4uw0mgo" path="res://src/scenes/player/third_person_camera_rig.gd" id="4_camera_rig"]
 [ext_resource type="Script" uid="uid://bhqbo1ftrt3a3" path="res://src/scenes/character/character_appearance_presenter.gd" id="5_appearance"]
 [ext_resource type="Script" uid="uid://c2jnn0e3mmymc" path="res://src/scenes/character/character_animation_presenter.gd" id="6_animation"]
+[ext_resource type="Script" path="res://src/render/world_render_facade.gd" id="7_render_facade"]
 
 [sub_resource type="CapsuleShape3D" id="PlayerCapsuleShape_1"]
 radius = 0.45
@@ -56,7 +57,6 @@ fog_depth_end = 5200.0
 
 [node name="StreamingWorld" type="Node3D" unique_id=1063159974]
 script = ExtResource("1_stream")
-streaming_focus_source_path = NodePath("ThirdPersonPlayer")
 camera_path = NodePath("ThirdPersonPlayer/CameraPivot/Camera3D")
 quality_preset = "High"
 update_interval = 0.1
@@ -94,6 +94,11 @@ wmo_visibility_range = 3600.0
 debug_streaming = true
 hitch_profiler_enabled = true
 
+[node name="WorldRenderFacade" type="Node" parent="."]
+script = ExtResource("7_render_facade")
+streaming_world_loader_path = NodePath("..")
+streaming_focus_source_path = NodePath("../ThirdPersonPlayer")
+
 [node name="ThirdPersonPlayer" type="CharacterBody3D" parent="." unique_id=502573687]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 16800, 80, 26400)
 script = ExtResource("2_player")

src/scenes/streaming/kalimdor_streaming.tscn

@@ -6,6 +6,7 @@
 [ext_resource type="Script" path="res://src/scenes/player/third_person_camera_rig.gd" id="4_camera_rig"]
 [ext_resource type="Script" path="res://src/scenes/character/character_appearance_presenter.gd" id="5_appearance"]
 [ext_resource type="Script" path="res://src/scenes/character/character_animation_presenter.gd" id="6_animation"]
+[ext_resource type="Script" path="res://src/render/world_render_facade.gd" id="7_render_facade"]
 
 [sub_resource type="CapsuleShape3D" id="PlayerCapsuleShape_1"]
 radius = 0.45
@@ -57,7 +58,6 @@ fog_depth_end = 5200.0
 [node name="StreamingWorld" type="Node3D" unique_id=1063159974]
 script = ExtResource("1_sisqv")
 map_name = "Kalimdor"
-streaming_focus_source_path = NodePath("ThirdPersonPlayer")
 camera_path = NodePath("ThirdPersonPlayer/CameraPivot/Camera3D")
 quality_preset = "High"
 update_interval = 0.1
@@ -95,6 +95,11 @@ wmo_visibility_range = 3600.0
 debug_streaming = true
 hitch_profiler_enabled = true
 
+[node name="WorldRenderFacade" type="Node" parent="."]
+script = ExtResource("7_render_facade")
+streaming_world_loader_path = NodePath("..")
+streaming_focus_source_path = NodePath("../ThirdPersonPlayer")
+
 [node name="ThirdPersonPlayer" type="CharacterBody3D" parent="." unique_id=502573687]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 16800, 80, 26400)
 script = ExtResource("2_puy8r")

src/tools/capture_render_checkpoints.gd

@@ -64,7 +64,12 @@ func _capture_async() -> void:
 	camera.far = 50000.0
 	camera.position = _vector3(first.get("camera", [0.0, 0.0, 0.0]))
 	(world as Node3D).add_child(camera)
-	world.set("streaming_focus_source_path", NodePath("CheckpointCamera"))
+	var render_facade := world.get_node_or_null("WorldRenderFacade")
+	if render_facade == null:
+		push_error("Streaming scene has no WorldRenderFacade")
+		quit(1)
+		return
+	render_facade.set("streaming_focus_source_path", NodePath("../CheckpointCamera"))
 	world.set("debug_streaming", true)
 	world.set("runtime_stats_enabled", true)
 	get_root().add_child(world)
@@ -126,8 +131,7 @@ func _capture_async() -> void:
 			if player != null:
 				player.global_position = _vector3(checkpoint.get("player", checkpoint.get("target", [0.0, 0.0, 0.0])))
 			_set_sky_time(world, float(checkpoint.get("time_hours", 13.0)))
-			if world.has_method("refresh_streaming_focus"):
-				world.call("refresh_streaming_focus", true)
+			render_facade.call("refresh_streaming_focus", true)
 
 			if dry_run:
 				print("RENDER_CHECKPOINT dry_run name=%s coverage=%s camera=%s target=%s yaw_offset=%.2f pitch_offset=%.2f time=%.2f" % [
@@ -148,7 +152,7 @@ func _capture_async() -> void:
 			var load_started := Time.get_ticks_usec()
 			await create_timer(maxf(wait_seconds, 0.0)).timeout
 			var load_time_ms := float(Time.get_ticks_usec() - load_started) / 1000.0
-			var metrics := await _measure_frames(maxf(measure_seconds, 0.1), world)
+			var metrics := await _measure_frames(maxf(measure_seconds, 0.1), render_facade)
 			await RenderingServer.frame_post_draw
 
 			var image := get_root().get_texture().get_image()
@@ -189,7 +193,7 @@ func _capture_async() -> void:
 	quit(0)
 
 
-func _measure_frames(seconds: float, world: Node) -> Dictionary:
+func _measure_frames(seconds: float, render_facade: Node) -> Dictionary:
 	var frame_times: Array[float] = []
 	var deadline := Time.get_ticks_usec() + int(seconds * 1000000.0)
 	var previous := Time.get_ticks_usec()
@@ -200,8 +204,8 @@ func _measure_frames(seconds: float, world: Node) -> Dictionary:
 		previous = now
 	frame_times.sort()
 	var snapshot := {}
-	if world.has_method("render_baseline_snapshot"):
-		snapshot = world.call("render_baseline_snapshot")
+	if render_facade.has_method("renderer_metrics_snapshot"):
+		snapshot = render_facade.call("renderer_metrics_snapshot")
 	return {
 		"frames": frame_times.size(),
 		"frame_ms_p50": _percentile(frame_times, 0.50),

src/tools/probe_render_camera_occluders.gd

@@ -28,7 +28,12 @@ func _run_async() -> void:
 	camera.name = "OccluderProbeCamera"
 	camera.current = true
 	world.add_child(camera)
-	world.set("streaming_focus_source_path", NodePath(camera.name))
+	var render_facade := world.get_node_or_null("WorldRenderFacade")
+	if render_facade == null:
+		push_error("CAMERA_OCCLUDER_PROBE: streaming scene has no WorldRenderFacade")
+		quit(1)
+		return
+	render_facade.set("streaming_focus_source_path", NodePath("../%s" % camera.name))
 	world.set("debug_streaming", false)
 	get_root().add_child(world)
 	await process_frame
@@ -47,8 +52,7 @@ func _run_async() -> void:
 		var camera_position := _vector3(checkpoint.get("camera", []))
 		var target_position := _vector3(checkpoint.get("target", []))
 		camera.global_position = camera_position
-		if world.has_method("refresh_streaming_focus"):
-			world.call("refresh_streaming_focus", true)
+		render_facade.call("refresh_streaming_focus", true)
 		await create_timer(maxf(0.1, wait_seconds)).timeout
 		var geometry_nodes: Array[Node3D] = []
 		_collect_geometry_nodes(world, geometry_nodes)

src/tools/probe_render_terrain_height.gd

@@ -37,7 +37,12 @@ func _run_async() -> void:
 	var camera := Camera3D.new()
 	camera.current = true
 	world.add_child(camera)
-	world.set("streaming_focus_source_path", NodePath(camera.name))
+	var render_facade := world.get_node_or_null("WorldRenderFacade")
+	if render_facade == null:
+		push_error("TERRAIN_HEIGHT_PROBE: streaming scene has no WorldRenderFacade")
+		quit(1)
+		return
+	render_facade.set("streaming_focus_source_path", NodePath("../%s" % camera.name))
 	world.set("debug_streaming", false)
 	get_root().add_child(world)
 	await process_frame
@@ -54,8 +59,7 @@ func _run_async() -> void:
 			continue
 		var camera_position := _vector3(checkpoint.get("camera", []))
 		camera.global_position = camera_position
-		if world.has_method("refresh_streaming_focus"):
-			world.call("refresh_streaming_focus", true)
+		render_facade.call("refresh_streaming_focus", true)
 		await create_timer(maxf(0.1, wait_seconds)).timeout
 		var terrain_sample := _sample_terrain(world, camera_position)
 		terrain_sample["name"] = checkpoint.get("name", "checkpoint")

src/tools/verify_streaming_focus.gd

@@ -6,6 +6,7 @@ const StreamingFocusScript = preload("res://src/domain/streaming/streaming_focus
 const GodotWorldPositionScript = preload("res://src/domain/coordinates/godot_world_position.gd")
 
 const LOADER_PATH := "res://src/scenes/streaming/streaming_world_loader.gd"
+const FACADE_PATH := "res://src/render/world_render_facade.gd"
 const RUNTIME_SCENE_PATHS: Array[String] = [
 	"res://src/scenes/streaming/eastern_kingdoms_streaming.tscn",
 	"res://src/scenes/streaming/kalimdor_streaming.tscn",
@@ -21,6 +22,7 @@ func _initialize() -> void:
 	var failures: Array[String] = []
 	_verify_scene_free_focus_value(failures)
 	_verify_loader_boundary(failures)
+	_verify_facade_boundary(failures)
 	_verify_runtime_scene_wiring(failures)
 	_verify_capture_tool_wiring(failures)
 
@@ -65,11 +67,21 @@ func _verify_loader_boundary(failures: Array[String]) -> void:
 		_expect_true(not loader_source.contains(forbidden_text), "loader omits %s" % forbidden_text, failures)
 
 
+func _verify_facade_boundary(failures: Array[String]) -> void:
+	var facade_source := _read_text(FACADE_PATH, failures)
+	for required_text in [
+		"class_name WorldRenderFacade",
+		"func set_streaming_focus(streaming_focus: StreamingFocus) -> void:",
+		"func refresh_streaming_focus(force: bool = false) -> bool:",
+	]:
+		_expect_true(facade_source.contains(required_text), "facade contains %s" % required_text, failures)
+
+
 func _verify_runtime_scene_wiring(failures: Array[String]) -> void:
 	for scene_path in RUNTIME_SCENE_PATHS:
 		var scene_source := _read_text(scene_path, failures)
 		_expect_true(
-			scene_source.contains('streaming_focus_source_path = NodePath("ThirdPersonPlayer")'),
+			scene_source.contains('streaming_focus_source_path = NodePath("../ThirdPersonPlayer")'),
 			"%s uses player focus" % scene_path,
 			failures
 		)
@@ -78,8 +90,8 @@ func _verify_runtime_scene_wiring(failures: Array[String]) -> void:
 func _verify_capture_tool_wiring(failures: Array[String]) -> void:
 	for tool_path in CAPTURE_TOOL_PATHS:
 		var tool_source := _read_text(tool_path, failures)
-		_expect_true(tool_source.contains('world.set("streaming_focus_source_path"'), "%s sets explicit focus source" % tool_path, failures)
-		_expect_true(tool_source.contains('world.call("refresh_streaming_focus", true)'), "%s uses public refresh" % tool_path, failures)
+		_expect_true(tool_source.contains('render_facade.set("streaming_focus_source_path"'), "%s sets explicit focus source" % tool_path, failures)
+		_expect_true(tool_source.contains('render_facade.call("refresh_streaming_focus", true)'), "%s uses facade refresh" % tool_path, failures)
 		_expect_true(not tool_source.contains('world.call("_refresh_streaming_targets_at"'), "%s avoids private refresh" % tool_path, failures)
 
 

src/tools/verify_world_render_facade.gd

@@ -0,0 +1,117 @@
+extends SceneTree
+
+## Headless contract and wiring regression for the first M03 renderer facade seam.
+
+const WORLD_RENDER_FACADE_SCRIPT := preload("res://src/render/world_render_facade.gd")
+const GODOT_WORLD_POSITION_SCRIPT := preload("res://src/domain/coordinates/godot_world_position.gd")
+const STREAMING_FOCUS_SCRIPT := preload("res://src/domain/streaming/streaming_focus.gd")
+
+const RUNTIME_SCENE_PATHS: Array[String] = [
+	"res://src/scenes/streaming/eastern_kingdoms_streaming.tscn",
+	"res://src/scenes/streaming/kalimdor_streaming.tscn",
+]
+const TOOL_PATHS: Array[String] = [
+	"res://src/tools/capture_render_checkpoints.gd",
+	"res://src/tools/probe_render_camera_occluders.gd",
+	"res://src/tools/probe_render_terrain_height.gd",
+]
+
+
+class StreamingWorldLoaderDouble extends Node:
+	var current_focus: StreamingFocus
+	var refresh_count := 0
+	var metrics := {"tiles": 2, "queues": {"tile": 1}}
+
+	func set_streaming_focus(streaming_focus: StreamingFocus) -> void:
+		current_focus = streaming_focus
+
+	func refresh_streaming_focus(_force: bool = false) -> bool:
+		refresh_count += 1
+		return current_focus != null
+
+	func render_baseline_snapshot() -> Dictionary:
+		return metrics
+
+
+func _initialize() -> void:
+	var failures: Array[String] = []
+	await _verify_delegation_and_snapshot_isolation(failures)
+	_verify_repository_wiring(failures)
+
+	if not failures.is_empty():
+		for failure in failures:
+			push_error("WORLD_RENDER_FACADE: %s" % failure)
+		quit(1)
+		return
+
+	print("WORLD_RENDER_FACADE PASS delegation=3 runtime_scenes=2 tools=3")
+	quit(0)
+
+
+func _verify_delegation_and_snapshot_isolation(failures: Array[String]) -> void:
+	var test_root := Node.new()
+	var loader := StreamingWorldLoaderDouble.new()
+	loader.name = "StreamingWorldLoaderDouble"
+	var source := Node3D.new()
+	source.name = "FocusSource"
+	source.position = Vector3(10.0, 20.0, 30.0)
+	var facade = WORLD_RENDER_FACADE_SCRIPT.new()
+	facade.name = "WorldRenderFacade"
+	facade.streaming_world_loader_path = NodePath("../StreamingWorldLoaderDouble")
+	facade.streaming_focus_source_path = NodePath("../FocusSource")
+	test_root.add_child(loader)
+	test_root.add_child(source)
+	test_root.add_child(facade)
+	get_root().add_child(test_root)
+	await process_frame
+
+	_expect_true(loader.current_focus != null, "ready captures explicit source", failures)
+	if loader.current_focus != null:
+		_expect_near(loader.current_focus.world_position.x_units, 10.0, "source X", failures)
+		_expect_near(loader.current_focus.world_position.y_units, 20.0, "source Y", failures)
+		_expect_near(loader.current_focus.world_position.z_units, 30.0, "source Z", failures)
+
+	var typed_focus = STREAMING_FOCUS_SCRIPT.new(GODOT_WORLD_POSITION_SCRIPT.new(40.0, 50.0, 60.0))
+	facade.streaming_focus_source_path = NodePath()
+	facade.set_streaming_focus(typed_focus)
+	_expect_true(facade.refresh_streaming_focus(true), "typed focus refresh delegates", failures)
+	_expect_true(loader.current_focus == typed_focus, "typed focus reference delegates", failures)
+
+	var snapshot: Dictionary = facade.renderer_metrics_snapshot()
+	snapshot["tiles"] = 999
+	(snapshot["queues"] as Dictionary)["tile"] = 999
+	_expect_true(int(loader.metrics.tiles) == 2, "top-level metrics are detached", failures)
+	_expect_true(int(loader.metrics.queues.tile) == 1, "nested metrics are detached", failures)
+	test_root.queue_free()
+
+
+func _verify_repository_wiring(failures: Array[String]) -> void:
+	for scene_path in RUNTIME_SCENE_PATHS:
+		var scene_source := _read_text(scene_path, failures)
+		_expect_true(scene_source.contains('path="res://src/render/world_render_facade.gd"'), "%s loads facade" % scene_path, failures)
+		_expect_true(scene_source.contains('[node name="WorldRenderFacade" type="Node" parent="."]'), "%s owns facade node" % scene_path, failures)
+		_expect_true(scene_source.contains('streaming_focus_source_path = NodePath("../ThirdPersonPlayer")'), "%s facade uses player focus" % scene_path, failures)
+
+	for tool_path in TOOL_PATHS:
+		var tool_source := _read_text(tool_path, failures)
+		_expect_true(tool_source.contains('get_node_or_null("WorldRenderFacade")'), "%s resolves facade" % tool_path, failures)
+		_expect_true(not tool_source.contains('world.call("refresh_streaming_focus"'), "%s avoids direct streamer refresh" % tool_path, failures)
+		_expect_true(not tool_source.contains('world.set("streaming_focus_source_path"'), "%s avoids direct streamer focus config" % tool_path, failures)
+
+
+func _read_text(path: String, failures: Array[String]) -> String:
+	var file := FileAccess.open(path, FileAccess.READ)
+	if file == null:
+		failures.append("cannot open %s" % path)
+		return ""
+	return file.get_as_text()
+
+
+func _expect_near(actual_value: float, expected_value: float, label: String, failures: Array[String]) -> void:
+	if not is_equal_approx(actual_value, expected_value):
+		failures.append("%s expected %.3f, got %.3f" % [label, expected_value, actual_value])
+
+
+func _expect_true(actual_value: bool, label: String, failures: Array[String]) -> void:
+	if not actual_value:
+		failures.append("%s expected true" % label)

src/tools/verify_world_render_facade.gd.uid

@@ -0,0 +1 @@
+uid://baoiewiesd02u