feat(M01): enforce coordinate conversion boundaries

Work-Package: M01-FND-COORD-BOUNDARY-GATE-001

Agent: sindo-main-codex

RENDER.md

@@ -843,6 +843,20 @@ $exe = Join-Path $env:TEMP 'godot-4.6.1-openwc\Godot_v4.6.1-stable_win64.exe'
 - Streaming radii, LOD decisions, cache formats and renderer quality profiles
   are unchanged by this migration.
 
+## 2026-07-13 Coordinate Conversion Boundary Gate
+
+- Sky/area lookup, streaming tile ownership, player spawn/terrain sampling and
+  terrain diagnostics now cross world-coordinate spaces through typed
+  `CoordinateMapper` methods.
+- Renderer distance, LOD, ray and model-local M2/WMO calculations remain in
+  their existing Godot/local spaces; they are not axis conversions.
+- The repository gate rejects new manual world-center, WoW/Godot and
+  Godot-position-to-ADT formulas. The unified renderer baseline runs this gate.
+- Native ADT/WDT parsers keep one shared world conversion in
+  `wow_chunk_reader.h`; the independent M00 calibration formula remains a test oracle.
+- Coordinate contract version 2, renderer radii, cache formats and visual
+  quality profiles are unchanged.
+
 ## 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.

docs/CODING_STANDARD.md

@@ -237,6 +237,23 @@ TODO/FIXME обязан содержать target/work-package ID или diagnos
 - Медленный понятный reference implementation полезен как oracle для optimized implementation.
 - Сложная оптимизация удаляется или упрощается, если она не даёт измеримого результата.
 
+## Coordinate conversion boundary
+
+- Cross-space world conversions выполняются только через typed API
+  `CoordinateMapper`; ручные world-center offsets, swaps осей и вычисление ADT
+  filename indices из Godot position запрещены.
+- Scene/render adapter МОЖЕТ создать `Vector3` только после получения
+  `GodotWorldPosition` или перевести engine vector в typed scalar value на своей границе.
+- Единственная native world-position формула находится в
+  `src/native/src/wow_chunk_reader.h`, поскольку parser workers не вызывают
+  GDScript. Новая native копия требует отдельного boundary decision и parity fixture.
+- `verify_render_coordinate_calibration.gd` остаётся независимым test oracle;
+  production code не копирует его формулы.
+- Model-local M2/WMO vertex basis и placement orientation не являются world
+  coordinate conversion. Они документируются и тестируются своим format adapter.
+- `verify_coordinate_conversion_boundaries.gd` обязателен при изменении
+  coordinates, native parsers, sky, player, streaming или renderer diagnostics.
+
 ## Review checklist
 
 - Можно ли понять назначение сущности по имени?
@@ -245,6 +262,8 @@ TODO/FIXME обязан содержать target/work-package ID или diagnos
 - Можно ли убрать abstraction без потери correctness/boundary?
 - Есть ли скрытый mutable state или side effect?
 - Не появился ли второй источник истины?
+- Все ли cross-space world coordinates проходят через `CoordinateMapper` или
+  документированную native boundary?
 - Измерена ли сложная optimization?
 - Изолирована и документирована ли неизбежная сложность?
 - Соответствуют ли API docs и diagrams фактическому коду?

docs/adr/0001-canonical-world-coordinates.md

@@ -108,6 +108,21 @@ show `indexX` decreasing world Y (east) and `indexY` decreasing world X (south).
 OpenRealm independently calculates filename X from world Y and filename Y from
 world X. Contract version 2 corrects the formulas before any consumer migration.
 
+### Enforced conversion boundaries
+
+GDScript production consumers use `CoordinateMapper` for canonical/Godot and
+Godot/ADT tile-local conversion. `StreamingWorldLoader`, player spawn/terrain
+sampling, sky/area lookup and terrain diagnostics may construct `Vector3` only
+at their scene/tool boundary.
+
+The native ADT/WDT parser path retains one equivalent formula definition in
+`src/native/src/wow_chunk_reader.h`; worker parsers cannot call GDScript. The
+M00 renderer calibration keeps one independent formula as a test oracle so a
+shared mapper defect cannot make both implementation and evidence agree.
+Repository verification rejects additional world-center, world/tile or named
+WoW/Godot formulas outside those explicit exceptions. Model-local M2/WMO basis
+transforms are separate format contracts and are not classified as world-space mapping.
+
 ## Alternatives considered
 
 ### Make renderer coordinates canonical
@@ -138,10 +153,12 @@ grid ownership rules.
 - Renderer consumers must explicitly map and then create Godot vectors at their
   own boundary.
 - ADT filename indices can no longer be confused with renderer X/Z tile names.
-- Existing native/parser and renderer conversions remain unchanged until
-  separate consumer migration packages merge after this contract.
-- Manual axis conversions become review/test violations once migration is
-  complete; this ADR alone does not delete compatibility paths.
+- GDScript world/tile consumers use mapper APIs; renderer distance and LOD math
+  remains ordinary Godot-space geometry.
+- Native ADT/WDT loaders share one boundary formula and the M00 calibration
+  keeps one independent non-production oracle.
+- New manual axis conversions are review/test violations enforced by the
+  repository-wide source gate.
 - Persisted schemas are unchanged. Future serialized positions must include an
   explicit coordinate-space/version discriminator.
 
@@ -154,6 +171,8 @@ grid ownership rules.
 - The observed Elwynn position resolves to the real `Azeroth_31_49.adt` file;
   MCNK `(0,0)` to `(15,15)` origins confirm X-east and Y-south chunk growth.
 - World-yaw normalization and round-trip cases cover cardinal angles and wrap.
+- Direct Godot/ADT tile-local conversions round-trip and production consumers
+  are checked by `verify_coordinate_conversion_boundaries.gd`.
 
 ## References
 

docs/modules/coordinate-mapping.md

@@ -5,9 +5,9 @@
 | Field | Value |
 |---|---|
 | Status | Implemented |
-| Target/work package | `M01-FND-COORDS-001`, `M01-FND-COORD-TILE-AXIS-002`, `M01-QAR-COORD-FIXTURES-001` |
+| Target/work package | `M01-FND-COORDS-001`, `M01-FND-COORD-TILE-AXIS-002`, `M01-QAR-COORD-FIXTURES-001`, `M01-FND-COORD-BOUNDARY-GATE-001` |
 | Owners | Foundation/domain |
-| Last verified | Worktree `work/sindo-main-codex/m01-coordinate-fixtures`, 2026-07-13 |
+| Last verified | Worktree `work/sindo-main-codex/m01-coordinate-boundary-gate`, 2026-07-13 |
 | Profiles/capabilities | All profiles; contract version 2 |
 
 ## Purpose
@@ -69,6 +69,9 @@ Forbidden dependencies:
 | `GodotWorldYaw` | Immutable value | Godot Y-axis world yaw in radians | Any thread; caller-owned reference | Constructor does not normalize |
 | `CoordinateMapper.server_to_canonical` / inverse | Pure static methods | Preserve server X/Y/Z as canonical | Synchronous; new result value | Null input is a caller contract violation |
 | `CoordinateMapper.canonical_to_godot` / inverse | Pure static methods | Apply Y-up renderer basis and map offset | Synchronous; new result value | Non-finite scalars propagate |
+| `CoordinateMapper.godot_to_adt_tile` | Pure static method | Resolve filename indices from typed renderer position | Synchronous; new result value | Result remains unclamped |
+| `CoordinateMapper.godot_to_adt_tile_local` | Pure static method | Resolve east/height/south offsets from typed renderer position | Synchronous; new result value | Caller validates ownership/range |
+| `CoordinateMapper.adt_tile_local_to_godot` | Pure static method | Compose typed renderer position from tile/local values | Synchronous; new result value | Non-finite scalars propagate |
 | `CoordinateMapper.canonical_to_adt_placement` / inverse | Pure static methods | Convert ADT placement field basis | Synchronous; new result value | Non-finite scalars propagate |
 | `CoordinateMapper.canonical_to_adt_tile` | Pure static method | Compute unclamped filename indices | Synchronous; new result value | Out-of-map result remains invalid |
 | `CoordinateMapper.canonical_to_adt_tile_local` / inverse | Pure static methods | Split/reconstruct tile-local position | Synchronous; new result value | Caller validates tile ownership |
@@ -106,6 +109,9 @@ flowchart LR
     Canonical -->|north-west edge offsets| Local[AdtTileLocalPosition]
     Local -->|floor offset / chunk size| Chunk[AdtChunkCoordinate]
     Canonical -->|half extent - Y; Z; half extent - X| Godot[GodotWorldPosition]
+    Godot -->|typed direct adapter| Tile
+    Godot -->|typed direct adapter| Local
+    Tile -->|tile plus local| Godot
     ServerYaw[ServerWorldYaw] -->|normalize only| CanonicalYaw[CanonicalWowWorldYaw]
     CanonicalYaw -->|same numeric world angle| GodotYaw[GodotWorldYaw]
 ```
@@ -172,7 +178,9 @@ raw three-number arrays are not an accepted new persistence contract.
 
 - Unit/contract tests: `src/tools/verify_coordinate_mapper.gd`.
 - Cross-source golden test: `src/tools/verify_coordinate_golden_fixtures.gd`.
-- Integration/E2E: consumer migration and `StreamingFocus` packages remain pending.
+- Boundary enforcement: `src/tools/verify_coordinate_conversion_boundaries.gd`.
+- Integration/E2E: sky, player, streamer and terrain probe use mapper boundaries;
+  `StreamingFocus` provides typed renderer focus.
 - Fidelity evidence: five build-12340 camera positions from the M00 manifest map
   within `0.002` yard; a pinned AzerothCore human-warrior spawn and one raw MCNK
   header observation independently confirm tile `(32,48)` and chunk `(3,12)`;
@@ -192,18 +200,19 @@ raw three-number arrays are not an accepted new persistence contract.
 
 | Capability | Status | Evidence | Gap/next step |
 |---|---|---|---|
-| Canonical/server/Godot position mapping | Implemented | Headless round-trip and five M00 golden points | Migrate producers/consumers |
+| Canonical/server/Godot position mapping | Implemented | Headless round-trip, five M00 golden points and migrated GDScript consumers | Network/server adapters remain future consumers |
 | ADT placement mapping | Implemented | Synthetic/direct round-trip fixtures | Compare native parsed placements during migration |
-| ADT tile/local/chunk ownership | Implemented | Center/extent boundaries plus raw `Azeroth_31_49.adt` filename and MCNK direction evidence | Migrate streaming consumers |
+| ADT tile/local/chunk ownership | Implemented | Center/extent boundaries, raw `Azeroth_31_49.adt` evidence and direct Godot adapter round-trip | Native parser remains explicit boundary |
 | World-facing yaw mapping | Implemented | Cardinal/wrap round-trip fixtures | Placement Euler remains separate |
-| Scene-free production contract | Implemented | Source boundary and headless test | Add dependency search gate later in M01 |
+| Scene-free production contract | Implemented | Source boundary, headless tests and repository-wide conversion gate | Maintain gate with new consumers |
 | Cross-source coordinate fixture | Implemented | Pinned AzerothCore spawn, raw ADT MCNK metadata and five build-12340 points pass one headless verifier | Add live adapter/renderer integration |
 | TrinityCore populated spawn equivalence | Not verified | The base development schema has no pinned populated row used by this fixture | Pin and verify a TDB snapshot before claiming parity |
 | Visual/server-spawn integration | Planned | M01 target criteria | Route the fixture through migrated adapters and renderer |
 
 ## Known gaps and risks
 
-- Existing native loaders and renderer scripts still contain manual conversions.
+- Native ADT/WDT parsing retains one shared boundary formula because worker
+  parsers cannot call GDScript; the gate prevents additional definitions.
 - Contract version 1 briefly transposed ADT filename/chunk axes; version 2 fixes
   the defect before any consumer migration.
 - MDDF/MODF rotation comments and implementations disagree across existing paths;
@@ -225,6 +234,7 @@ raw three-number arrays are not an accepted new persistence contract.
 | `src/tools/verify_coordinate_mapper.gd` | Headless fixtures and boundary regressions |
 | `src/tests/fixtures/coordinate_golden_points.json` | Versioned cross-source values, provenance and tolerances |
 | `src/tools/verify_coordinate_golden_fixtures.gd` | Cross-source fixture schema and mapper validation |
+| `src/tools/verify_coordinate_conversion_boundaries.gd` | Repository-wide manual conversion and required-consumer gate |
 | `docs/adr/0001-canonical-world-coordinates.md` | Normative axes, units, boundaries and rollout decision |
 
 ## Related decisions and references

src/domain/coordinates/coordinate_mapper.gd

@@ -48,6 +48,36 @@ static func godot_to_canonical(godot_position: GodotWorldPosition) -> CanonicalW
 	)
 
 
+## Returns ADT filename indices directly from a Godot renderer position.
+static func godot_to_adt_tile(godot_position: GodotWorldPosition) -> AdtTileCoordinate:
+	return AdtTileCoordinate.new(
+		int(floor(godot_position.x_units / ADT_TILE_SIZE_YARDS)),
+		int(floor(godot_position.z_units / ADT_TILE_SIZE_YARDS))
+	)
+
+
+## Returns east/height/south offsets inside the owning ADT tile.
+static func godot_to_adt_tile_local(godot_position: GodotWorldPosition) -> AdtTileLocalPosition:
+	var tile_coordinate := godot_to_adt_tile(godot_position)
+	return AdtTileLocalPosition.new(
+		godot_position.x_units - float(tile_coordinate.tile_x) * ADT_TILE_SIZE_YARDS,
+		godot_position.y_units,
+		godot_position.z_units - float(tile_coordinate.tile_y) * ADT_TILE_SIZE_YARDS
+	)
+
+
+## Converts an ADT tile/local pair directly to the Godot renderer basis.
+static func adt_tile_local_to_godot(
+		tile_coordinate: AdtTileCoordinate,
+		local_position: AdtTileLocalPosition
+) -> GodotWorldPosition:
+	return GodotWorldPosition.new(
+		float(tile_coordinate.tile_x) * ADT_TILE_SIZE_YARDS + local_position.east_yards,
+		local_position.height_yards,
+		float(tile_coordinate.tile_y) * ADT_TILE_SIZE_YARDS + local_position.south_yards
+	)
+
+
 ## Converts canonical WoW coordinates to MDDF/MODF X/height/Z file fields.
 static func canonical_to_adt_placement(canonical_position: CanonicalWowWorldPosition) -> AdtPlacementPosition:
 	return AdtPlacementPosition.new(

src/scenes/player/third_person_wow_controller.gd

@@ -3,9 +3,12 @@ extends CharacterBody3D
 const GEOSET_CONTROLLER_SCRIPT := preload("res://src/scenes/character/character_geoset_controller.gd")
 const TEXTURE_COMPOSITOR_SCRIPT := preload("res://src/scenes/character/character_texture_compositor.gd")
 const OUTFIT_RESOLVER_SCRIPT := preload("res://src/scenes/character/wow_character_outfit_resolver.gd")
+const COORDINATE_MAPPER_SCRIPT := preload("res://src/domain/coordinates/coordinate_mapper.gd")
+const GODOT_WORLD_POSITION_SCRIPT := preload("res://src/domain/coordinates/godot_world_position.gd")
+const ADT_TILE_COORDINATE_SCRIPT := preload("res://src/domain/coordinates/adt_tile_coordinate.gd")
+const ADT_TILE_LOCAL_POSITION_SCRIPT := preload("res://src/domain/coordinates/adt_tile_local_position.gd")
 
-const TILE_SIZE := 533.33333
-const CHUNK_SIZE := TILE_SIZE / 16.0
+const CHUNK_SIZE := COORDINATE_MAPPER_SCRIPT.ADT_CHUNK_SIZE_YARDS
 const UNIT_SIZE := CHUNK_SIZE / 8.0
 
 @export var extracted_dir: String = "res://data/extracted"
@@ -62,8 +65,11 @@ func _ready() -> void:
 		_camera.current = true
 		_camera.far = 50000.0
 	if spawn_at_tile_center:
-		global_position.x = (float(spawn_tile_x) + 0.5) * TILE_SIZE
-		global_position.z = (float(spawn_tile_y) + 0.5) * TILE_SIZE
+		var spawn_tile = ADT_TILE_COORDINATE_SCRIPT.new(spawn_tile_x, spawn_tile_y)
+		var half_tile_size := COORDINATE_MAPPER_SCRIPT.ADT_TILE_SIZE_YARDS * 0.5
+		var spawn_local = ADT_TILE_LOCAL_POSITION_SCRIPT.new(half_tile_size, global_position.y, half_tile_size)
+		var spawn_position = COORDINATE_MAPPER_SCRIPT.adt_tile_local_to_godot(spawn_tile, spawn_local)
+		global_position = Vector3(spawn_position.x_units, spawn_position.y_units, spawn_position.z_units)
 	_load_character_visual()
 	var ground := _sample_ground_height(global_position)
 	if is_finite(ground):
@@ -324,16 +330,17 @@ func _apply_camera_transform() -> void:
 
 
 func _sample_ground_height(world_pos: Vector3) -> float:
-	var tx := int(floor(world_pos.x / TILE_SIZE))
-	var ty := int(floor(world_pos.z / TILE_SIZE))
-	var data := _load_adt(tx, ty)
+	var typed_world_position = GODOT_WORLD_POSITION_SCRIPT.new(world_pos.x, world_pos.y, world_pos.z)
+	var tile_coordinate = COORDINATE_MAPPER_SCRIPT.godot_to_adt_tile(typed_world_position)
+	var tile_local_position = COORDINATE_MAPPER_SCRIPT.godot_to_adt_tile_local(typed_world_position)
+	var chunk_coordinate = COORDINATE_MAPPER_SCRIPT.adt_tile_local_to_chunk(tile_coordinate, tile_local_position)
+	var data := _load_adt(tile_coordinate.tile_x, tile_coordinate.tile_y)
 	if data.is_empty():
 		return NAN
 
 	var tile_origin := _get_tile_origin(data)
-	var local := world_pos - tile_origin
-	var chunk_x := clampi(int(floor(local.x / CHUNK_SIZE)), 0, 15)
-	var chunk_y := clampi(int(floor(local.z / CHUNK_SIZE)), 0, 15)
+	var chunk_x := clampi(chunk_coordinate.chunk_x, 0, 15)
+	var chunk_y := clampi(chunk_coordinate.chunk_y, 0, 15)
 	var chunk := _find_chunk(data, chunk_x, chunk_y, tile_origin)
 	if chunk.is_empty():
 		return NAN

src/scenes/sky/wow_sky_controller.gd

@@ -2,9 +2,9 @@
 extends Node
 
 const M2_BUILDER_SCRIPT := preload("res://addons/mpq_extractor/loaders/m2_builder.gd")
+const COORDINATE_MAPPER_SCRIPT := preload("res://src/domain/coordinates/coordinate_mapper.gd")
+const GODOT_WORLD_POSITION_SCRIPT := preload("res://src/domain/coordinates/godot_world_position.gd")
 
-const TILE_SIZE := 533.33333
-const WOW_WORLD_CENTER := 17066.666
 const LIGHT_COORD_SCALE := 36.0
 const HALF_MINUTES_PER_DAY := 2880
 
@@ -701,28 +701,30 @@ func _get_target_wow_position() -> Vector3:
 	var world_pos := Vector3.ZERO
 	if _target:
 		world_pos = _target.global_position
-	return Vector3(
-		WOW_WORLD_CENTER - world_pos.z,
-		WOW_WORLD_CENTER - world_pos.x,
-		world_pos.y)
+	var canonical_position = COORDINATE_MAPPER_SCRIPT.godot_to_canonical(_typed_godot_position(world_pos))
+	return Vector3(canonical_position.x_yards, canonical_position.y_yards, canonical_position.z_yards)
 
 
 func _get_target_area_id() -> int:
 	if not _target or map_name.is_empty():
 		return 0
 	var world_pos := _target.global_position
-	var tile_x := int(floor(world_pos.x / TILE_SIZE))
-	var tile_y := int(floor(world_pos.z / TILE_SIZE))
-	var local_x := world_pos.x - float(tile_x) * TILE_SIZE
-	var local_y := world_pos.z - float(tile_y) * TILE_SIZE
-	var chunk_x := clampi(int(floor(local_x / (TILE_SIZE / 16.0))), 0, 15)
-	var chunk_y := clampi(int(floor(local_y / (TILE_SIZE / 16.0))), 0, 15)
-	var areas := _load_adt_area_grid(tile_x, tile_y)
+	var typed_world_position = _typed_godot_position(world_pos)
+	var tile_coordinate = COORDINATE_MAPPER_SCRIPT.godot_to_adt_tile(typed_world_position)
+	var local_position = COORDINATE_MAPPER_SCRIPT.godot_to_adt_tile_local(typed_world_position)
+	var chunk_coordinate = COORDINATE_MAPPER_SCRIPT.adt_tile_local_to_chunk(tile_coordinate, local_position)
+	var areas := _load_adt_area_grid(tile_coordinate.tile_x, tile_coordinate.tile_y)
 	if areas.is_empty():
 		return 0
+	var chunk_x := clampi(chunk_coordinate.chunk_x, 0, 15)
+	var chunk_y := clampi(chunk_coordinate.chunk_y, 0, 15)
 	return int(areas[chunk_y * 16 + chunk_x])
 
 
+func _typed_godot_position(world_position: Vector3):
+	return GODOT_WORLD_POSITION_SCRIPT.new(world_position.x, world_position.y, world_position.z)
+
+
 func _load_adt_area_grid(tile_x: int, tile_y: int) -> PackedInt32Array:
 	var key := "%d_%d" % [tile_x, tile_y]
 	if _adt_area_cache.has(key):

src/scenes/streaming/streaming_world_loader.gd

@@ -14,14 +14,17 @@ const M2_NATIVE_ANIMATED_BUILDER_SCRIPT := preload("res://addons/mpq_extractor/l
 const M2_NATIVE_ANIMATOR_SCRIPT := preload("res://src/scenes/streaming/m2_native_animator.gd")
 const STREAMING_FOCUS_SCRIPT := preload("res://src/domain/streaming/streaming_focus.gd")
 const GODOT_WORLD_POSITION_SCRIPT := preload("res://src/domain/coordinates/godot_world_position.gd")
+const COORDINATE_MAPPER_SCRIPT := preload("res://src/domain/coordinates/coordinate_mapper.gd")
+const ADT_TILE_COORDINATE_SCRIPT := preload("res://src/domain/coordinates/adt_tile_coordinate.gd")
+const ADT_TILE_LOCAL_POSITION_SCRIPT := preload("res://src/domain/coordinates/adt_tile_local_position.gd")
 const REQUIRED_BAKED_TILE_FORMAT_VERSION := 5
 const REQUIRED_SPLAT_TILE_FORMAT_VERSION := 1
 const REQUIRED_CONTROL_SPLAT_TILE_FORMAT_VERSION := 3
 const M2_MATERIAL_REFRESH_VERSION := 2
 const WMO_MATERIAL_REFRESH_VERSION := 10
 
-const TILE_SIZE := 533.33333
-const CHUNK_SIZE := TILE_SIZE / 16.0
+const TILE_SIZE := COORDINATE_MAPPER_SCRIPT.ADT_TILE_SIZE_YARDS
+const CHUNK_SIZE := COORDINATE_MAPPER_SCRIPT.ADT_CHUNK_SIZE_YARDS
 const ADT_CLIFFROCK_WORLD_YAW_OFFSET := PI
 const ADT_WATERFALL_WORLD_YAW_OFFSET := PI * 0.5
 const QUALITY_CUSTOM := "Custom"
@@ -786,10 +789,9 @@ func _apply_streaming_target(wanted_tiles: Dictionary, retained_tiles: Dictionar
 			var parts: PackedStringArray = key.split("_")
 			var tx: int = int(parts[0])
 			var ty: int = int(parts[1])
-			var tcx: float = (tx + 0.5) * TILE_SIZE
-			var tcz: float = (ty + 0.5) * TILE_SIZE
-			var dx: float = tcx - focus_pos.x
-			var dz: float = tcz - focus_pos.z
+			var tile_center := _tile_center_to_world(tx, ty)
+			var dx: float = tile_center.x - focus_pos.x
+			var dz: float = tile_center.z - focus_pos.z
 			_tile_load_queue.append({
 				"key":      key,
 				"tx":       tx,
@@ -2909,8 +2911,10 @@ func _predictive_focus_tiles(focus_pos: Vector3) -> Array[Vector2i]:
 	if threshold <= 0.0:
 		return result
 
-	var local_x := fposmod(focus_pos.x, TILE_SIZE) / TILE_SIZE
-	var local_z := fposmod(focus_pos.z, TILE_SIZE) / TILE_SIZE
+	var typed_focus_position = GODOT_WORLD_POSITION_SCRIPT.new(focus_pos.x, focus_pos.y, focus_pos.z)
+	var tile_local_position = COORDINATE_MAPPER_SCRIPT.godot_to_adt_tile_local(typed_focus_position)
+	var local_x: float = tile_local_position.east_yards / TILE_SIZE
+	var local_z: float = tile_local_position.south_yards / TILE_SIZE
 	var x_offsets: Array[int] = [0]
 	var z_offsets: Array[int] = [0]
 
@@ -3033,10 +3037,17 @@ func _is_tile_chunk_set_ready(state: Dictionary) -> bool:
 
 
 func _tile_dist_sq(state: Dictionary, cam_pos: Vector3) -> float:
-	var min_x: float = float(state["tx"]) * TILE_SIZE
-	var max_x: float = min_x + TILE_SIZE
-	var min_z: float = float(state["ty"]) * TILE_SIZE
-	var max_z: float = min_z + TILE_SIZE
+	var tile_coordinate = ADT_TILE_COORDINATE_SCRIPT.new(int(state["tx"]), int(state["ty"]))
+	var north_west_position = COORDINATE_MAPPER_SCRIPT.adt_tile_local_to_godot(
+		tile_coordinate,
+		ADT_TILE_LOCAL_POSITION_SCRIPT.new(0.0, 0.0, 0.0))
+	var south_east_position = COORDINATE_MAPPER_SCRIPT.adt_tile_local_to_godot(
+		tile_coordinate,
+		ADT_TILE_LOCAL_POSITION_SCRIPT.new(TILE_SIZE, 0.0, TILE_SIZE))
+	var min_x: float = north_west_position.x_units
+	var max_x: float = south_east_position.x_units
+	var min_z: float = north_west_position.z_units
+	var max_z: float = south_east_position.z_units
 
 	var dx := 0.0
 	if cam_pos.x < min_x:
@@ -5397,9 +5408,9 @@ func _position_camera_over_world() -> void:
 	if camera == null:
 		return
 
-	var center_tx: float = (_tile_min.x + _tile_max.x) * 0.5
-	var center_ty: float = (_tile_min.y + _tile_max.y) * 0.5
-	var center := _tile_center_to_world(center_tx, center_ty)
+	var minimum_tile_center := _tile_center_to_world(_tile_min.x, _tile_min.y)
+	var maximum_tile_center := _tile_center_to_world(_tile_max.x, _tile_max.y)
+	var center := (minimum_tile_center + maximum_tile_center) * 0.5
 	var tile_span: int = int(max(_tile_max.x - _tile_min.x + 1, _tile_max.y - _tile_min.y + 1))
 	var height: float = max(2000.0, float(tile_span) * TILE_SIZE * 0.18)
 
@@ -5408,19 +5419,19 @@ func _position_camera_over_world() -> void:
 	_camera_initialized = true
 
 
-## Tile (tx, ty) NW corner sits at Godot (tx*TILE_SIZE, 0, ty*TILE_SIZE).
-## This matches wow_to_godot output: chunk origins ≈ (TX*TILE_SIZE, h, TY*TILE_SIZE).
-func _tile_center_to_world(tile_x: float, tile_y: float) -> Vector3:
-	return Vector3(
-		(tile_x + 0.5) * TILE_SIZE,
-		0.0,
-		(tile_y + 0.5) * TILE_SIZE)
+func _tile_center_to_world(tile_x: int, tile_y: int) -> Vector3:
+	var tile_coordinate = ADT_TILE_COORDINATE_SCRIPT.new(tile_x, tile_y)
+	var half_tile_size := TILE_SIZE * 0.5
+	var tile_center_position = COORDINATE_MAPPER_SCRIPT.adt_tile_local_to_godot(
+		tile_coordinate,
+		ADT_TILE_LOCAL_POSITION_SCRIPT.new(half_tile_size, 0.0, half_tile_size))
+	return Vector3(tile_center_position.x_units, tile_center_position.y_units, tile_center_position.z_units)
 
 
 func _world_to_tile(world_pos: Vector3) -> Vector2i:
-	return Vector2i(
-		int(floor(world_pos.x / TILE_SIZE)),
-		int(floor(world_pos.z / TILE_SIZE)))
+	var typed_world_position = GODOT_WORLD_POSITION_SCRIPT.new(world_pos.x, world_pos.y, world_pos.z)
+	var tile_coordinate = COORDINATE_MAPPER_SCRIPT.godot_to_adt_tile(typed_world_position)
+	return Vector2i(tile_coordinate.tile_x, tile_coordinate.tile_y)
 
 
 func _tile_key(tx: int, ty: int) -> String:

src/tools/probe_render_terrain_height.gd

@@ -5,7 +5,8 @@ extends SceneTree
 ##   [--wait 3.0] [--output user://render_terrain_height/report.json]
 
 const MANIFEST_PATH := "res://src/tools/render_baseline_manifest.json"
-const TILE_SIZE := 533.33333
+const COORDINATE_MAPPER_SCRIPT := preload("res://src/domain/coordinates/coordinate_mapper.gd")
+const GODOT_WORLD_POSITION_SCRIPT := preload("res://src/domain/coordinates/godot_world_position.gd")
 const RAY_HEIGHT := 5000.0
 
 
@@ -90,9 +91,7 @@ func _run_async() -> void:
 
 
 func _sample_terrain(world: Node3D, world_position: Vector3) -> Dictionary:
-	var tile_coordinate := Vector2i(
-		int(floor(world_position.x / TILE_SIZE)),
-		int(floor(world_position.z / TILE_SIZE)))
+	var tile_coordinate := _adt_tile_vector2i(world_position)
 	var tile_states: Dictionary = world.get("_tile_states")
 	var highest_terrain_height := -INF
 	var intersected_tile_key := ""
@@ -198,9 +197,7 @@ func _nearest_terrain_sample(world: Node3D, world_position: Vector3) -> Dictiona
 	for radius in [2.0, 5.0, 10.0, 20.0, 40.0]:
 		for offset in [Vector2(radius, 0.0), Vector2(-radius, 0.0), Vector2(0.0, radius), Vector2(0.0, -radius)]:
 			var sample_position := world_position + Vector3(offset.x, 0.0, offset.y)
-			var sample_tile := Vector2i(
-				int(floor(sample_position.x / TILE_SIZE)),
-				int(floor(sample_position.z / TILE_SIZE)))
+			var sample_tile := _adt_tile_vector2i(sample_position)
 			var sample_key := "%d_%d" % [sample_tile.x, sample_tile.y]
 			if not tile_states.has(sample_key):
 				continue
@@ -214,6 +211,12 @@ func _nearest_terrain_sample(world: Node3D, world_position: Vector3) -> Dictiona
 	return {"nearest_sample_distance": null}
 
 
+func _adt_tile_vector2i(world_position: Vector3) -> Vector2i:
+	var typed_world_position = GODOT_WORLD_POSITION_SCRIPT.new(world_position.x, world_position.y, world_position.z)
+	var tile_coordinate = COORDINATE_MAPPER_SCRIPT.godot_to_adt_tile(typed_world_position)
+	return Vector2i(tile_coordinate.tile_x, tile_coordinate.tile_y)
+
+
 func _vector3_array(value: Vector3) -> Array[float]:
 	return [value.x, value.y, value.z]
 

src/tools/verify_coordinate_conversion_boundaries.gd

@@ -0,0 +1,140 @@
+extends SceneTree
+
+## Repository-wide M01 gate against manual cross-space world coordinate formulas.
+## Model-local M2/WMO basis transforms and ordinary Godot-space geometry are not
+## world-space conversions and are intentionally outside these signatures.
+
+const SCAN_ROOTS: Array[String] = ["res://src", "res://addons"]
+const SOURCE_EXTENSIONS: Array[String] = ["gd", "cpp", "h", "hpp"]
+const EXCLUDED_DIRECTORY_PREFIXES: Array[String] = ["res://src/native/build/"]
+const GATE_PATH := "res://src/tools/verify_coordinate_conversion_boundaries.gd"
+const COORDINATE_MAPPER_PATH := "res://src/domain/coordinates/coordinate_mapper.gd"
+const CALIBRATION_ORACLE_PATH := "res://src/tools/verify_render_coordinate_calibration.gd"
+const NATIVE_BOUNDARY_PATH := "res://src/native/src/wow_chunk_reader.h"
+const ALLOWED_LEGACY_NAME_PATHS: Array[String] = [
+	NATIVE_BOUNDARY_PATH,
+	"res://src/native/src/adt_loader.cpp",
+	"res://src/native/src/wdt_loader.cpp",
+	CALIBRATION_ORACLE_PATH,
+]
+const REQUIRED_MAPPER_CALLS := {
+	"res://src/scenes/sky/wow_sky_controller.gd": ["godot_to_canonical", "godot_to_adt_tile", "godot_to_adt_tile_local"],
+	"res://src/scenes/streaming/streaming_world_loader.gd": ["godot_to_adt_tile", "godot_to_adt_tile_local", "adt_tile_local_to_godot"],
+	"res://src/scenes/player/third_person_wow_controller.gd": ["godot_to_adt_tile", "adt_tile_local_to_godot"],
+	"res://src/tools/probe_render_terrain_height.gd": ["godot_to_adt_tile"],
+}
+
+
+func _initialize() -> void:
+	var failures: Array[String] = []
+	var source_paths: Array[String] = []
+	for scan_root in SCAN_ROOTS:
+		_collect_source_paths(scan_root, source_paths, failures)
+
+	var native_boundary_definition_count := 0
+	var independent_oracle_definition_count := 0
+	for source_path in source_paths:
+		if source_path == GATE_PATH:
+			continue
+		var source := _read_text(source_path, failures)
+		var source_lines := source.split("\n")
+		for line_index in range(source_lines.size()):
+			var source_line := String(source_lines[line_index])
+			var violation := _coordinate_violation(source_path, source_line)
+			if not violation.is_empty():
+				failures.append("%s:%d %s" % [source_path, line_index + 1, violation])
+			if source_path == NATIVE_BOUNDARY_PATH and source_line.contains("inline void wow_to_godot"):
+				native_boundary_definition_count += 1
+			if source_path == CALIBRATION_ORACLE_PATH and source_line.contains("func _wow_to_godot"):
+				independent_oracle_definition_count += 1
+
+	_expect_equal(native_boundary_definition_count, 1, "native world conversion definition count", failures)
+	_expect_equal(independent_oracle_definition_count, 1, "independent calibration oracle count", failures)
+	_verify_required_mapper_calls(failures)
+	_verify_classifier_guards(failures)
+
+	if not failures.is_empty():
+		for failure in failures:
+			push_error("COORDINATE_CONVERSION_BOUNDARIES: %s" % failure)
+		quit(1)
+		return
+
+	print("COORDINATE_CONVERSION_BOUNDARIES PASS files=%d native_boundary=1 oracle=1 consumers=4 classifier_cases=6" % source_paths.size())
+	quit(0)
+
+
+func _coordinate_violation(source_path: String, source_line: String) -> String:
+	var stripped_line := source_line.strip_edges()
+	if stripped_line.is_empty():
+		return ""
+	if (source_line.contains("wow_to_godot") or source_line.contains("godot_to_wow")) and source_path not in ALLOWED_LEGACY_NAME_PATHS:
+		return "manual WoW/Godot conversion name outside mapper boundary"
+	if (source_line.contains("17066.666") or source_line.contains("WOW_WORLD_CENTER")) and source_path not in [NATIVE_BOUNDARY_PATH, CALIBRATION_ORACLE_PATH]:
+		return "manual WoW world-center formula outside native boundary/oracle"
+	if source_line.contains("1600.0 / 3.0") and source_path != COORDINATE_MAPPER_PATH:
+		return "duplicated ADT tile-size formula outside CoordinateMapper"
+	if source_path != COORDINATE_MAPPER_PATH and source_line.contains("floor(") and source_line.contains("TILE_SIZE") and (source_line.contains(".x") or source_line.contains(".z")):
+		return "manual Godot world-position to ADT tile formula"
+	if source_path != COORDINATE_MAPPER_PATH and source_line.contains("fposmod(") and source_line.contains("TILE_SIZE"):
+		return "manual Godot world-position to ADT tile-local formula"
+	if source_path != COORDINATE_MAPPER_PATH and source_line.contains("+ 0.5) * TILE_SIZE"):
+		return "manual ADT tile-center to Godot world-position formula"
+	return ""
+
+
+func _verify_required_mapper_calls(failures: Array[String]) -> void:
+	for source_path in REQUIRED_MAPPER_CALLS:
+		var source := _read_text(source_path, failures)
+		for required_call in REQUIRED_MAPPER_CALLS[source_path]:
+			if not source.contains(String(required_call)):
+				failures.append("%s must call CoordinateMapper.%s" % [source_path, required_call])
+
+
+func _verify_classifier_guards(failures: Array[String]) -> void:
+	_expect_true(not _coordinate_violation("res://src/example.gd", "const CENTER := 17066.666").is_empty(), "world-center classifier", failures)
+	_expect_true(not _coordinate_violation("res://src/example.gd", "func wow_to_godot():").is_empty(), "conversion-name classifier", failures)
+	_expect_true(not _coordinate_violation("res://src/example.gd", "floor(world_position.x / TILE_SIZE)").is_empty(), "world-to-tile classifier", failures)
+	_expect_true(not _coordinate_violation("res://src/example.gd", "fposmod(world_position.z, TILE_SIZE)").is_empty(), "world-to-tile-local classifier", failures)
+	_expect_true(not _coordinate_violation("res://src/example.gd", "(tile_x + 0.5) * TILE_SIZE").is_empty(), "tile-center classifier", failures)
+	_expect_true(_coordinate_violation(NATIVE_BOUNDARY_PATH, "inline void wow_to_godot(float wx) { gx = -(wx - 17066.666f); }").is_empty(), "native boundary exception", failures)
+
+
+func _collect_source_paths(directory_path: String, source_paths: Array[String], failures: Array[String]) -> void:
+	var directory := DirAccess.open(directory_path)
+	if directory == null:
+		failures.append("cannot scan directory %s" % directory_path)
+		return
+	for entry_name in directory.get_files():
+		var source_path := directory_path.path_join(entry_name)
+		if entry_name.get_extension().to_lower() in SOURCE_EXTENSIONS:
+			source_paths.append(source_path)
+	for child_directory_name in directory.get_directories():
+		var child_directory_path := directory_path.path_join(child_directory_name) + "/"
+		if _has_excluded_prefix(child_directory_path):
+			continue
+		_collect_source_paths(child_directory_path.trim_suffix("/"), source_paths, failures)
+
+
+func _has_excluded_prefix(path: String) -> bool:
+	for excluded_prefix in EXCLUDED_DIRECTORY_PREFIXES:
+		if path.begins_with(excluded_prefix):
+			return true
+	return false
+
+
+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_equal(actual_value, expected_value, label: String, failures: Array[String]) -> void:
+	if actual_value != expected_value:
+		failures.append("%s expected %s, got %s" % [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_coordinate_conversion_boundaries.gd.uid

@@ -0,0 +1 @@
+uid://bnj844sd2n6ln

src/tools/verify_coordinate_mapper.gd

@@ -119,6 +119,18 @@ func _verify_tile_and_chunk_boundaries(failures: Array[String]) -> void:
 	_expect_true(local_position.east_yards >= 0.0 and local_position.east_yards < tile_size, "tile-local east offset is half-open", failures)
 	_expect_true(local_position.south_yards >= 0.0 and local_position.south_yards < tile_size, "tile-local south offset is half-open", failures)
 
+	var godot_position = CoordinateMapperScript.canonical_to_godot(CanonicalWowWorldPositionScript.new(-9153.334, 386.666, 180.0))
+	var direct_godot_tile = CoordinateMapperScript.godot_to_adt_tile(godot_position)
+	var direct_godot_local = CoordinateMapperScript.godot_to_adt_tile_local(godot_position)
+	var direct_godot_round_trip = CoordinateMapperScript.adt_tile_local_to_godot(direct_godot_tile, direct_godot_local)
+	_expect_equal(direct_godot_tile.tile_x, 31, "direct Godot ADT tile X", failures)
+	_expect_equal(direct_godot_tile.tile_y, 49, "direct Godot ADT tile Y", failures)
+	_expect_near(direct_godot_local.east_yards, 146.66677, GOLDEN_POSITION_TOLERANCE_YARDS, "direct Godot tile-local east", failures)
+	_expect_near(direct_godot_local.south_yards, 86.66677, GOLDEN_POSITION_TOLERANCE_YARDS, "direct Godot tile-local south", failures)
+	_expect_near(direct_godot_round_trip.x_units, godot_position.x_units, ROUND_TRIP_TOLERANCE_YARDS, "direct Godot tile-local X round trip", failures)
+	_expect_near(direct_godot_round_trip.y_units, godot_position.y_units, ROUND_TRIP_TOLERANCE_YARDS, "direct Godot tile-local Y round trip", failures)
+	_expect_near(direct_godot_round_trip.z_units, godot_position.z_units, ROUND_TRIP_TOLERANCE_YARDS, "direct Godot tile-local Z round trip", failures)
+
 	var chunk_local_position = AdtTileLocalPositionScript.new(
 		CoordinateMapperScript.ADT_CHUNK_SIZE_YARDS * 2.0,
 		180.0,

tools/run_render_baseline.ps1

@@ -57,6 +57,7 @@ try {
     Invoke-GodotStep "runtime-cache-shutdown" @("--headless", "--path", ".", "--script", "res://src/tools/verify_render_runtime_cache_shutdown.gd")
     Invoke-GodotStep "baseline-manifest" @("--headless", "--path", ".", "--script", "res://src/tools/verify_render_baseline_manifest.gd")
     Invoke-GodotStep "coordinate-calibration" @("--headless", "--path", ".", "--script", "res://src/tools/verify_render_coordinate_calibration.gd")
+    Invoke-GodotStep "coordinate-boundaries" @("--headless", "--path", ".", "--script", "res://src/tools/verify_coordinate_conversion_boundaries.gd")
 
     $captureArgs = @(
         "--path", ".",