docs(M03): accept terrain chunk queue planner

RENDER.md

@@ -950,6 +950,33 @@ $exe = Join-Path $env:TEMP 'godot-4.6.1-openwc\Godot_v4.6.1-stable_win64.exe'
 - The ray height, 3x3 tile search and `2/5/10/20/40`-unit nearby fallback are
   preserved. No terrain geometry, cache, streaming or visual behavior changed.
 
+## 2026-07-16 Terrain Chunk LOD Planner Extraction
+
+- `TerrainChunkLodPlanner` now owns the pure mapping from populated parsed ADT
+  chunk indices to desired terrain LOD 0/1/2.
+- `TerrainChunkLodPolicy` snapshots the existing enabled flag, three raw chunk
+  radii and chunk size once per streaming-target application.
+- Horizontal XZ distance to the chunk center, inclusive squared thresholds,
+  sparse-index omission and historical negative-radius squaring are unchanged.
+- `StreamingWorldLoader` still owns tile/chunk state, queues, operation budgets,
+  creation/removal, Mesh/Node/RID finalization and tile-LOD fallback.
+- Cache formats, quality presets and visible behavior are unchanged. The
+  scene-free contract is formula evidence only; asset-backed p95/p99 and visual
+  acceptance remain required.
+
+## 2026-07-16 Terrain Chunk Geometry Queue Planner Extraction
+
+- `TerrainChunkGeometryQueuePlanner` now compares current and desired chunk state
+  and returns fresh chunk create/remove request arrays.
+- LOD mismatches and absent chunks retain the existing request shape; creates
+  remain sorted by horizontal distance from chunk origin to streaming focus.
+- Desired tile LOD still removes every current chunk, while sparse parsed chunk
+  records retain the existing tile-origin distance fallback.
+- `StreamingWorldLoader` still owns queue storage/drains, removal-first execution,
+  the shared `chunk_geometry` budget lane and every Mesh/Node/RID side effect.
+- Cache formats, quality profiles and visual rules are unchanged. Asset-backed
+  p95/p99 and visual acceptance remain required.
+
 ## 2026-07-16 World Environment Snapshot Facade
 
 - `WorldEnvironmentSnapshot` carries one immutable finite time-of-day value,

coordination/claims/M03-RND-TERRAIN-CHUNK-QUEUE-001.md

@@ -0,0 +1,104 @@
+# M03-RND-TERRAIN-CHUNK-QUEUE-001 — Pure terrain chunk geometry queue planner
+
+<!-- OPENWC_CLAIM:M03-RND-TERRAIN-CHUNK-QUEUE-001:sindo-main-codex:2026-07-19 -->
+
+## Ownership
+
+- Target: M03
+- Program: RND
+- Owner/Agent ID: sindo-main-codex
+- Branch: `work/sindo-main-codex/m03-terrain-chunk-queue`
+- Lease expires UTC: 2026-07-19
+- Integrator: M03 milestone integrator
+
+## Outcome
+
+Extract chunk-geometry create/remove desired-operation calculation from the
+streamer into a scene-free `TerrainChunkGeometryQueuePlanner`.
+
+## Non-goals
+
+- Move queue storage/drains, render budgets, tile-LOD queues or async tasks.
+- Move chunk Mesh/Node/RID creation/removal or terrain state ownership.
+- Change removal-first execution, nearest-first create order or LOD selection.
+- Change coordinate conversions, radii, cache formats or quality profiles.
+- Add dependencies or mark the broad terrain service checklist complete.
+
+## Paths
+
+- Exclusive: `src/render/terrain/terrain_chunk_geometry_queue_planner.gd`,
+  `src/tools/verify_terrain_chunk_geometry_queue_planner.gd`,
+  `docs/modules/terrain-chunk-geometry-queue-planner.md`, this claim
+- Shared/hotspots: `src/scenes/streaming/streaming_world_loader.gd`,
+  `docs/modules/world-renderer.md`, `docs/modules/README.md`, `RENDER.md`,
+  `targets/03-renderer-facade.md`
+- Generated/ignored: `.godot`, native DLL, generated ADT resources, caches and
+  proprietary renderer corpus
+
+## Contracts and data
+
+- Input: loader-owned tile-state read model plus immutable `GodotWorldPosition`
+- Output: fresh create/remove request arrays; planner retains no queue state
+- Removal: current chunks absent from desired state, or all current chunks while
+  tile LOD is desired
+- Creation: missing or LOD-mismatched chunks, sorted by origin XZ distance
+- Queue/cache/schema/coordinate versions: unchanged
+
+## Dependencies
+
+- Requires: integrated terrain LOD planner master `b568768`
+- Blocks: broader terrain service extraction and dependency/performance acceptance
+- External state: none; tests use synthetic tile/chunk dictionaries
+
+## Verification
+
+- Commands: dedicated removal/create/mismatch/tile-fallback/sparse/order and
+  bounded timing verifier; loader source boundary; facade/cache/LOD/internal-access/
+  manifest/shutdown/scheduler/streaming planner and repository gates
+- Fidelity evidence: extracted branch/order/distance rules and loader drain order
+- Performance budget: bounded linear planning plus existing create sort; no engine
+  resource, task, cache or persistent allocation framework
+
+## Documentation deliverables
+
+- Inline planner API documentation
+- New module spec with inputs/outputs, data-flow, lifecycle, sequence, ownership,
+  failure, performance and source map
+- World renderer/module registry/`RENDER.md` updates
+
+## Simplicity and naming
+
+- Important name: `TerrainChunkGeometryQueuePlanner`
+- Simplest solution: one stateless planner returning two fresh arrays
+- Rejected complexity: generic operation graph, queue class, callback strategy,
+  spatial index or ownership transfer
+- Unavoidable complexity: raw dictionaries remain at the loader/ADT adapter boundary
+- Measured optimization evidence: bounded synthetic multi-tile verifier
+
+## Status
+
+- State: accepted
+- Done: pure planner, loader queue adoption, semantic/timing regressions and docs
+- Next: asset-backed performance acceptance and further terrain-service extraction later in M03
+- Blocked by:
+
+<!-- OPENWC_HANDOFF:READY:M03-RND-TERRAIN-CHUNK-QUEUE-001:f800e11 -->
+<!-- OPENWC_INTEGRATION:ACCEPTED:M03-RND-TERRAIN-CHUNK-QUEUE-001:24aef13 -->
+
+## Handoff
+
+- Commit: `f800e11` (`refactor(M03): extract terrain chunk queue planner`)
+- Results: dedicated contract PASS (`cases=8`, `iterations=100`, `235.096 ms`);
+  LOD/cache/facade/internal-access/manifest/shutdown/scheduler/streaming/focus/
+  ground/terrain-query/coordinate regressions PASS; internal inventory remains
+  `42`; editor parse has no script errors; documentation/coordination/diff gates
+  PASS; checkpoint dry-run planned `7/7` entries with expected missing-private-
+  corpus diagnostics
+- Remaining risks: planner adds a second linear tile-state pass; asset-backed
+  p95/p99 and visual acceptance remain pending; queue drains, terrain state and
+  Mesh/Node/RID finalization remain loader-owned
+- Documentation updated: `terrain-chunk-geometry-queue-planner.md`, module
+  registry, `world-renderer.md`, `RENDER.md`, inline API documentation and
+  data-flow/lifecycle/sequence diagrams
+- Integration: accepted in master merge `24aef13`; post-merge planner,
+  internal-access, facade and manifest gates passed

coordination/claims/M03-RND-TERRAIN-LOD-PLANNER-001.md

@@ -0,0 +1,103 @@
+# M03-RND-TERRAIN-LOD-PLANNER-001 — Pure terrain chunk LOD planner
+
+<!-- OPENWC_CLAIM:M03-RND-TERRAIN-LOD-PLANNER-001:sindo-main-codex:2026-07-18 -->
+
+## Ownership
+
+- Target: M03
+- Program: RND
+- Owner/Agent ID: sindo-main-codex
+- Branch: `work/sindo-main-codex/m03-terrain-chunk-lod-planner`
+- Lease expires UTC: 2026-07-18
+- Integrator: M03 milestone integrator
+
+## Outcome
+
+Extract chunk-level terrain LOD desired-state calculation from the streamer into
+a scene-free `TerrainChunkLodPlanner` with immutable policy and typed focus input.
+
+## Non-goals
+
+- Move chunk/tile queues, loaded state, Mesh/Node/RID creation or budget drains.
+- Change radii, chunk size, threshold inclusivity, priority sorting or tile LOD policy.
+- Normalize/reorder custom radii or reinterpret negative values.
+- Move ADT parsing, quality cache/tasks, materials or ground query.
+- Add dependencies, persistence, workers or mark terrain extraction complete.
+
+## Paths
+
+- Exclusive: `src/render/terrain/terrain_chunk_lod_policy.gd`,
+  `src/render/terrain/terrain_chunk_lod_planner.gd`,
+  `src/tools/verify_terrain_chunk_lod_planner.gd`,
+  `docs/modules/terrain-chunk-lod-planner.md`, this claim
+- Shared/hotspots: `src/scenes/streaming/streaming_world_loader.gd`,
+  `docs/modules/world-renderer.md`, `docs/modules/README.md`, `RENDER.md`,
+  `targets/03-renderer-facade.md`
+- Generated/ignored: `.godot`, native DLL, generated resources, caches and
+  proprietary renderer corpus
+
+## Contracts and data
+
+- Input: ADT chunk adapter records, immutable `GodotWorldPosition`, immutable
+  enabled/radii/chunk-size policy
+- Output: detached Dictionary mapping source chunk index to LOD `0`, `1` or `2`
+- Formula: horizontal distance to `origin + half chunk`; inclusive squared thresholds
+- Disabled policy and empty/sparse chunks return absent entries exactly as before
+- Queue/cache/schema/coordinate versions: unchanged
+
+## Dependencies
+
+- Requires: integrated terrain cache slice master `ea08b8e`
+- Blocks: broader terrain service extraction and dependency/performance acceptance
+- External state: none; tests use synthetic chunk adapter records
+
+## Verification
+
+- Commands: dedicated center/boundary/outside/sparse/disabled/custom-radius and
+  bounded timing verifier; loader source boundary; facade/cache/internal-access/
+  manifest/shutdown/scheduler/streaming planner and repository gates
+- Fidelity evidence: extracted formulas and all seven baseline plans remain unchanged
+- Performance budget: bounded linear scan over at most the ADT chunk record count;
+  no Node, Resource, RID, task, cache entry or allocation framework
+
+## Documentation deliverables
+
+- Inline API docs for policy/planner
+- New module spec with inputs/outputs, data-flow, lifecycle, sequence, ownership,
+  failure, performance and source map
+- World renderer/module registry/`RENDER.md` updates
+
+## Simplicity and naming
+
+- Important names: `TerrainChunkLodPolicy`, `TerrainChunkLodPlanner`
+- Simplest solution: immutable scalar policy plus one pure linear planner
+- Rejected complexity: generic spatial index, quadtree, callback strategy,
+  normalized profile model or queue ownership
+- Unavoidable complexity: raw chunk dictionaries remain at the ADT adapter boundary
+- Measured optimization evidence: verifier records bounded High-like planning time
+
+## Status
+
+- State: accepted
+- Done: immutable policy, pure planner, both loader call sites, regressions and docs
+- Next: asset-backed performance acceptance and further terrain-service extraction later in M03
+- Blocked by:
+
+<!-- OPENWC_HANDOFF:READY:M03-RND-TERRAIN-LOD-PLANNER-001:eb94cfc -->
+<!-- OPENWC_INTEGRATION:ACCEPTED:M03-RND-TERRAIN-LOD-PLANNER-001:f36fabb -->
+
+## Handoff
+
+- Commit: `eb94cfc` (`refactor(M03): extract terrain chunk LOD planner`)
+- Results: dedicated contract PASS (`cases=7`, `iterations=250`, `12.726 ms`);
+  cache/facade/internal-access/manifest/shutdown/scheduler/streaming-focus/
+  streaming-planner/ground/terrain-query/coordinate regressions PASS; editor parse
+  has no script errors; documentation and coordination gates PASS; checkpoint
+  dry-run planned `7/7` entries with expected missing-private-corpus diagnostics
+- Remaining risks: asset-backed p95/p99 and visual acceptance remain pending;
+  terrain state, queue, quality-upgrade and finalization ownership remains in loader
+- Documentation updated: `terrain-chunk-lod-planner.md`, module registry,
+  `world-renderer.md`, `RENDER.md`, inline public API documentation and data-flow,
+  lifecycle and sequence diagrams
+- Integration: accepted in master merge `f36fabb`; post-merge planner, facade,
+  internal-access and manifest gates passed

docs/modules/README.md

@@ -13,6 +13,8 @@
 | Local player movement | Implemented | [`local-player-movement.md`](local-player-movement.md) |
 | Terrain query | Implemented | [`terrain-query.md`](terrain-query.md) |
 | Terrain quality Mesh cache | Implemented extraction | [`terrain-quality-mesh-cache.md`](terrain-quality-mesh-cache.md) |
+| Terrain chunk LOD planner | Implemented extraction | [`terrain-chunk-lod-planner.md`](terrain-chunk-lod-planner.md) |
+| Terrain chunk geometry queue planner | Implemented extraction | [`terrain-chunk-geometry-queue-planner.md`](terrain-chunk-geometry-queue-planner.md) |
 | Third-person camera | Implemented | [`third-person-camera.md`](third-person-camera.md) |
 | Character presentation | Implemented boundary / Partial fidelity | [`character-presentation.md`](character-presentation.md) |
 | Renderer | Partial | [`world-renderer.md`](world-renderer.md), [`../../RENDER.md`](../../RENDER.md) |

docs/modules/terrain-chunk-geometry-queue-planner.md

@@ -0,0 +1,195 @@
+# Terrain Chunk Geometry Queue Planner
+
+## Metadata
+
+| Field | Value |
+|---|---|
+| Status | Implemented extraction |
+| Target/work package | M03 / `M03-RND-TERRAIN-CHUNK-QUEUE-001` |
+| Owners | Pure chunk geometry create/remove request calculation |
+| Last verified | Worktree `work/sindo-main-codex/m03-terrain-chunk-queue`, 2026-07-16 |
+| Profiles/capabilities | Existing chunk/tile LOD desired state; all profiles |
+
+## Purpose
+
+Compare loader-owned current chunk geometry with desired chunk/tile LOD state
+and produce fresh removal and nearest-first creation request arrays.
+
+## Non-goals
+
+- Retain, drain or bound queues, or own per-frame operation permits.
+- Create/remove Mesh, Node, material or RID resources.
+- Calculate desired chunk/tile LOD, parse ADT data or schedule worker tasks.
+- Change cache versions, renderer profiles or visible fidelity rules.
+- Provide a generic queue/operation framework.
+
+## Context and boundaries
+
+```mermaid
+flowchart LR
+    Current[Loader-owned tile/chunk state] --> Planner[TerrainChunkGeometryQueuePlanner]
+    Desired[Desired chunk and tile LOD state] --> Planner
+    Focus[GodotWorldPosition] --> Planner
+    Planner --> Remove[Stable-order remove requests]
+    Planner --> Create[Nearest-first create requests]
+    Remove --> Loader[StreamingWorldLoader queues]
+    Create --> Loader
+    Loader --> Budget[RenderBudgetScheduler permit]
+    Budget --> GPU[Existing Mesh/Node/RID side effects]
+```
+
+Allowed dependencies are typed Godot position and call-local scalar/container
+values. SceneTree, RenderingServer, ResourceLoader, worker APIs, gameplay,
+network, editor UI, files and persistent caches are forbidden.
+
+## Public API
+
+| Symbol | Kind | Purpose | Thread/lifetime | Errors |
+|---|---|---|---|---|
+| `TerrainChunkGeometryQueuePlanner.plan(tile_states, focus_position)` | Pure query | Return fresh `create_requests` and `remove_requests` arrays | Synchronous; caller owns result | Null/wrong focus returns two empty arrays |
+
+Script-identity validation uses a preload and therefore works from a cold Godot
+global-class cache.
+
+## Inputs and outputs
+
+| Direction | Contract/data | Producer | Consumer | Ownership | Thread/lifetime |
+|---|---|---|---|---|---|
+| Input | Tile-state read model with current chunks and desired LODs | Streamer | Planner | Loader-owned; read only | One rebuild |
+| Input | Desired tile LOD | Tile LOD calculation | Planner | Scalar in loader state | One rebuild |
+| Input | Parsed chunk origins and tile fallback origin | ADT result/loader | Planner | Loader-owned; read only | Map session |
+| Input | `GodotWorldPosition` | Streamer focus adapter | Planner | Immutable caller reference | One rebuild |
+| Output | Remove `{tile, chunk}` records | Planner | Loader removal queue | Fresh caller array/dictionaries | Until drained/rebuilt |
+| Output | Create `{tile, chunk, lod, dist_sq}` records | Planner | Loader creation queue | Fresh nearest-first array/dictionaries | Until drained/rebuilt |
+
+Distance is horizontal XZ squared distance from the chunk origin, not its center.
+Y is intentionally ignored. A missing/sparse parsed origin falls back to the
+tile state's existing origin exactly as before extraction.
+
+## Data flow
+
+```mermaid
+flowchart TD
+    Start[plan] --> FocusValid{Typed focus?}
+    FocusValid -->|no| Empty[Return two empty arrays]
+    FocusValid -->|yes| Tile[Iterate tile state insertion order]
+    Tile --> TileLod{Desired tile LOD active?}
+    TileLod -->|yes| RemoveAll[Append every current chunk removal]
+    TileLod -->|no| Compare[Compare current and desired chunks]
+    Compare --> RemoveMissing[Append current chunks absent from desired]
+    Compare --> CreateMismatch[Append LOD-mismatched creates]
+    Compare --> CreateMissing[Append absent desired creates]
+    CreateMismatch --> Origin[Parsed chunk origin or tile fallback]
+    CreateMissing --> Origin
+    Origin --> Distance[Attach squared XZ distance]
+    RemoveAll --> Next[Next tile]
+    RemoveMissing --> Next
+    Distance --> Next
+    Next --> Sort[Sort creates nearest-first]
+    Sort --> Result[Return fresh arrays]
+```
+
+## Lifecycle/state
+
+The planner is stateless. Each loader queue rebuild supplies current read models
+and receives new arrays. The loader adopts and drains those arrays until another
+rebuild replaces them. Planner destruction requires no cleanup or cancellation.
+
+## Main sequence
+
+```mermaid
+sequenceDiagram
+    participant Loader as StreamingWorldLoader
+    participant Planner as TerrainChunkGeometryQueuePlanner
+    participant Budget as RenderBudgetScheduler
+    participant Render as Existing terrain finalization
+    Loader->>Planner: plan(tile states, typed focus)
+    Planner-->>Loader: fresh create/remove arrays
+    Loader->>Budget: request shared chunk_geometry permit
+    Budget-->>Loader: permit
+    Loader->>Render: pop_back removal first
+    Loader->>Budget: request shared chunk_geometry permit
+    Budget-->>Loader: permit
+    Loader->>Render: pop_front nearest creation
+```
+
+## Ownership, threading and resources
+
+- The planner owns only call-local arrays and dictionaries until return.
+- The loader owns adopted queue storage, drain ordering, tile/chunk state and all
+  Mesh/Node/material/RID side effects.
+- Calls and drains currently run on the renderer main thread. The planner has no
+  lock, task, retained resource or concurrent mutation.
+- Removal and creation continue to share the existing `chunk_geometry` budget lane.
+
+## Errors, cancellation and recovery
+
+| Failure | Detection | Behavior | Diagnostic | Recovery |
+|---|---|---|---|---|
+| Null/wrong focus script | Identity guard | Return empty request arrays | Contract verifier | Supply typed focus and rebuild |
+| Sparse/out-of-range chunk data | Origin resolver | Use tile fallback origin | Synthetic fixture | Normal ADT completion restores precise origin |
+| Tile LOD becomes desired | Desired tile LOD check | Remove every current chunk; no chunk creates | Queue metrics | Existing tile-LOD create path takes over |
+| Queue rebuild before drain | Loader lifecycle | Replace old desired-operation arrays | Existing queue metrics | Latest state wins |
+| Shutdown/map reset | Loader lifecycle | Loader clears queues; planner has nothing to cancel | Shutdown verifier | New session replans |
+
+## Configuration and capabilities
+
+The planner introduces no settings. It consumes already-calculated desired LOD
+state. Operation limits, profile defaults and removal-first drain order remain
+loader/scheduler configuration.
+
+## Persistence, cache and migration
+
+No serialization, cache entry or format changes. Baked terrain, control-splat
+and splat caches require no rebuild or migration.
+
+## Diagnostics and observability
+
+The planner emits no logs. Existing queue metrics observe the adopted arrays.
+The contract verifier reports semantic cases and bounded multi-tile timing.
+Asset-backed p95/p99 remains milestone acceptance work.
+
+## Verification
+
+- `verify_terrain_chunk_geometry_queue_planner.gd`: missing/mismatched/unchanged
+  chunks, tile-LOD removal, sparse origin fallback, XZ-only distance, stable
+  removals, nearest creates, invalid focus, loader boundary and bounded timing.
+- Existing LOD planner, terrain cache, facade, internal-access, manifest,
+  shutdown, scheduler, streaming and coordinate regressions remain required.
+- Fidelity evidence is exact branch/request/order preservation only. No new
+  build-12340 visual parity claim is made.
+
+## Extension points
+
+- Extract tile-LOD operation planning as its own bounded contract if justified.
+- Add explicit typed tile-state adapters only when more than one consumer exists.
+
+## Capability status
+
+| Capability | Status | Evidence | Gap/next step |
+|---|---|---|---|
+| Pure chunk create/remove planning | Implemented extraction | Asset-free semantic/source/timing verifier | Asset-backed p95/p99 pending |
+| Queue execution/resource ownership | Remains in loader | Drain source boundary and scheduler regression | Further terrain decomposition required |
+
+## Known gaps and risks
+
+- Raw tile/chunk dictionaries remain a transitional ADT adapter boundary.
+- The planner performs a second linear tile-state pass beside tile-LOD planning;
+  bounded synthetic timing is green, but asset-backed frame metrics are pending.
+- Equal-distance create ordering retains comparator behavior without a tie-breaker.
+- Terrain geometry finalization and state mutation remain monolithic.
+
+## Source map
+
+| Path | Responsibility |
+|---|---|
+| `src/render/terrain/terrain_chunk_geometry_queue_planner.gd` | Pure request calculation and nearest-first creation order |
+| `src/scenes/streaming/streaming_world_loader.gd` | Queue adoption, tile-LOD planning, budgets and render side effects |
+| `src/tools/verify_terrain_chunk_geometry_queue_planner.gd` | Semantic, boundary and timing regression |
+
+## Related decisions and references
+
+- [`terrain-chunk-lod-planner.md`](terrain-chunk-lod-planner.md)
+- [`world-renderer.md`](world-renderer.md)
+- [`../../RENDER.md`](../../RENDER.md)
+- [`../../targets/roadmap/02-rendering-and-graphics.md`](../../targets/roadmap/02-rendering-and-graphics.md)

docs/modules/terrain-chunk-lod-planner.md

@@ -0,0 +1,179 @@
+# Terrain Chunk LOD Planner
+
+## Metadata
+
+| Field | Value |
+|---|---|
+| Status | Implemented extraction |
+| Target/work package | M03 / `M03-RND-TERRAIN-LOD-PLANNER-001` |
+| Owners | Pure desired chunk-LOD calculation only |
+| Last verified | Worktree `work/sindo-main-codex/m03-terrain-chunk-lod-planner`, 2026-07-16 |
+| Profiles/capabilities | Existing Performance/Balanced/High/Custom radii |
+
+## Purpose
+
+Calculate the desired terrain LOD for each populated parsed ADT chunk from one
+typed Godot-space focus and one immutable renderer-policy snapshot.
+
+## Non-goals
+
+- Own tile/chunk state, queues, budgets, tasks, Mesh, Node, material or RID.
+- Select tile LOD, create/remove geometry or apply a completed plan.
+- Normalize custom radii, change profile defaults or claim visual parity.
+- Parse ADT data or convert between WoW and Godot coordinate spaces.
+
+## Context and boundaries
+
+```mermaid
+flowchart LR
+    Focus[GodotWorldPosition] --> Planner[TerrainChunkLodPlanner]
+    Chunks[Parsed ADT chunk records] --> Planner
+    Config[Streamer LOD configuration] --> Policy[TerrainChunkLodPolicy]
+    Policy --> Planner
+    Planner --> Desired[chunk index to LOD 0/1/2]
+    Desired --> Loader[StreamingWorldLoader state adapter]
+    Loader --> Queue[Existing create/remove queues and budgets]
+```
+
+Allowed dependencies are the typed Godot position, immutable policy and
+call-local Array/Dictionary/Vector3 values. SceneTree, RenderingServer, gameplay,
+network, files, tasks and persistent caches are forbidden.
+
+## Public API
+
+| Symbol | Kind | Purpose | Thread/lifetime | Errors |
+|---|---|---|---|---|
+| `TerrainChunkLodPolicy.new(...)` | Immutable value | Snapshot enabled flag, three raw radii and chunk size | Caller-owned; one planning refresh | Values are preserved without normalization |
+| `TerrainChunkLodPlanner.plan(chunks, focus_position, policy)` | Pure query | Map populated source indices to LOD 0/1/2 | Synchronous; result caller-owned | Invalid/null typed inputs or disabled policy return empty |
+
+The planner validates scripts by preloaded identity so it works from a cold
+Godot global-class cache.
+
+## Inputs and outputs
+
+| Direction | Contract/data | Producer | Consumer | Ownership | Thread/lifetime |
+|---|---|---|---|---|---|
+| Input | Parsed chunk array with `origin: Vector3` | ADT load result | Planner | Loader-owned; read only | One call |
+| Input | `GodotWorldPosition` | Streamer focus adapter | Planner | Immutable caller reference | One call |
+| Input | `TerrainChunkLodPolicy` | Streamer exported configuration | Planner | Immutable caller reference | One call |
+| Output | `{source_chunk_index: 0/1/2}` | Planner | Loader desired state | Fresh caller dictionary | One call |
+
+The Y coordinate is intentionally ignored. Empty chunk records and chunks beyond
+the third radius are absent from the result.
+
+## Data flow
+
+```mermaid
+flowchart TD
+    Start[plan] --> Valid{Typed inputs and enabled?}
+    Valid -->|no| Empty[Return empty dictionary]
+    Valid -->|yes| Radii[Square raw radius times chunk size]
+    Radii --> Iterate[Visit source chunk indices in order]
+    Iterate --> Populated{Record populated?}
+    Populated -->|no| Iterate
+    Populated -->|yes| Center[origin XZ plus half chunk]
+    Center --> Distance[Squared horizontal distance]
+    Distance --> Threshold{First inclusive threshold}
+    Threshold -->|LOD0/1/2| Record[Record source index]
+    Threshold -->|outside| Iterate
+    Record --> Iterate
+    Iterate --> Done[Return desired mapping]
+```
+
+## Lifecycle/state
+
+The planner is stateless. A policy is constructed for one refresh, read during
+synchronous planning and released. The returned dictionary is then owned by the
+loader state. There is no cancellation, recovery state or retained resource.
+
+## Main sequence
+
+```mermaid
+sequenceDiagram
+    participant Stream as StreamingWorldLoader
+    participant Policy as TerrainChunkLodPolicy
+    participant Planner as TerrainChunkLodPlanner
+    Stream->>Policy: snapshot enabled/radii/chunk size
+    Stream->>Planner: plan(chunks, typed focus, policy)
+    Planner-->>Stream: fresh desired LOD dictionary
+    Stream->>Stream: existing tile state, queue and budget application
+```
+
+## Ownership, threading and resources
+
+- Planner and policy own no engine resources, nodes, RIDs, tasks or caches.
+- The loader retains parsed chunks, desired state and every application side effect.
+- Current calls run synchronously on the renderer main thread; the pure inputs
+  also make isolated contract testing possible without a world scene.
+
+## Errors, cancellation and recovery
+
+| Failure | Detection | Behavior | Diagnostic | Recovery |
+|---|---|---|---|---|
+| Null/wrong focus or policy script | Identity guard | Empty plan | Contract verifier | Supply typed values next refresh |
+| Disabled chunk LOD | Policy flag | Empty plan; existing tile-LOD fallback applies | Existing renderer state | Enable profile option |
+| Empty chunk record | Record guard | Preserve sparse source index; omit record | None | Not an error |
+| Custom negative radius | No normalization | Existing squared-radius behavior is retained | Regression fixture | Change caller configuration if undesired |
+
+There is no asynchronous work or cancellation token.
+
+## Configuration and capabilities
+
+The policy snapshots `use_chunk_terrain_lods`, `lod0_radius_chunks`,
+`lod1_radius_chunks`, `lod2_radius_chunks` and the existing `CHUNK_SIZE`. Inclusive
+squared thresholds and raw custom values deliberately preserve prior behavior.
+
+## Persistence, cache and migration
+
+No serialization or cache format changes. Existing baked terrain, control-splat
+and splat cache versions remain unchanged and require no rebuild.
+
+## Diagnostics and observability
+
+The service emits no logs. The contract verifier reports semantic cases and a
+bounded synthetic timing. Asset-backed p95/p99 remains milestone acceptance work.
+
+## Verification
+
+- `verify_terrain_chunk_lod_planner.gd`: center and vertical invariance,
+  inclusive thresholds, sparse/outside chunks, disabled/custom-negative policy,
+  loader delegation and 250-by-256 bounded planning.
+- Renderer cache, facade, internal-access, baseline, scheduler, target-planner,
+  focus, ground-query and coordinate-boundary regressions remain required.
+- Fidelity evidence is formula preservation only; no new build-12340 visual
+  equivalence claim is made.
+
+## Extension points
+
+- Add measured direction/velocity only through an explicit policy/contract change.
+- Keep queue prioritization and LOD application as separately bounded services.
+
+## Capability status
+
+| Capability | Status | Evidence | Gap/next step |
+|---|---|---|---|
+| Pure chunk desired-LOD calculation | Implemented extraction | Asset-free semantic/source-boundary contract | Asset-backed p95/p99 pending |
+| Queue/state/finalization ownership | Remains in loader | Source-boundary regression | Further terrain decomposition required |
+
+## Known gaps and risks
+
+- Raw negative and non-monotonic custom radii retain historical squared/ordered
+  semantics, even though such settings may be surprising.
+- The planner is linear in parsed chunk count and allocates one result dictionary.
+- Terrain build, quality upgrades and geometry lifecycle remain monolithic.
+
+## Source map
+
+| Path | Responsibility |
+|---|---|
+| `src/render/terrain/terrain_chunk_lod_policy.gd` | Immutable configuration snapshot |
+| `src/render/terrain/terrain_chunk_lod_planner.gd` | Pure horizontal-distance plan |
+| `src/scenes/streaming/streaming_world_loader.gd` | Composition and plan application adapter |
+| `src/tools/verify_terrain_chunk_lod_planner.gd` | Contract, dependency and timing regression |
+
+## Related decisions and references
+
+- [`world-renderer.md`](world-renderer.md)
+- [`terrain-quality-mesh-cache.md`](terrain-quality-mesh-cache.md)
+- [`../../RENDER.md`](../../RENDER.md)
+- [`../../targets/roadmap/02-rendering-and-graphics.md`](../../targets/roadmap/02-rendering-and-graphics.md)

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`; M03 facade/planner/scheduler/internal-access/ground/environment/entity packages; `M03-RND-TERRAIN-CACHE-SERVICE-001` |
+| Target/work package | M00 baseline; `M01-RND-STREAMING-FOCUS-001`; `M01-QAR-SERVER-SPAWN-RENDERER-001`; M03 facade/planner/scheduler/internal-access/ground/environment/entity packages; M03 terrain cache/LOD/geometry-queue packages |
 | Owners | Renderer workstream / milestone integrator |
-| Last verified | Worktree `work/sindo-main-codex/m03-terrain-quality-cache`, 2026-07-16 |
+| Last verified | Worktree `work/sindo-main-codex/m03-terrain-chunk-queue`, 2026-07-16 |
 | Profiles/capabilities | `Performance`, `Balanced`, `High`, `Custom`; Blizzlike fidelity incomplete |
 
 ## Purpose
@@ -42,6 +42,10 @@ flowchart LR
     Cache[Baked terrain/M2/WMO caches] --> Loader
     Loader --> TerrainCache[TerrainQualityMeshCache]
     TerrainCache --> Loader
+    Loader --> ChunkLod[TerrainChunkLodPlanner]
+    ChunkLod --> Loader
+    Loader --> ChunkQueue[TerrainChunkGeometryQueuePlanner]
+    ChunkQueue --> Loader
     Native --> Parsed[Parsed tile/model data]
     Parsed --> Loader
     Loader --> Scene[SceneTree nodes]
@@ -106,6 +110,8 @@ from externally reading/writing loader-private queue, task, cache and tile-state
 | `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 |
 | `TerrainQualityMeshCache.store/restore/clear` | Internal terrain service | Owns admitted full-quality revisit Mesh references and LRU | Renderer thread/map session | Rejected/missed entry leaves loader fallback unchanged |
+| `TerrainChunkLodPlanner.plan` | Internal pure terrain query | Maps populated parsed chunk indices to desired LOD 0/1/2 | Synchronous per target refresh | Invalid/disabled input returns empty for existing tile-LOD fallback |
+| `TerrainChunkGeometryQueuePlanner.plan` | Internal pure terrain query | Produces chunk create/remove requests from current and desired state | Synchronous per queue rebuild | Invalid focus returns empty arrays |
 
 Публичным contract не считаются `StreamingWorldLoader` methods/properties,
 внутренние dictionaries, queues, job records и generated node names. Scene-owned
@@ -128,6 +134,8 @@ loader configuration remains transitional composition data, not a caller API.
 | Output | `StreamingTargetPlan` | `StreamingTargetPlanner` | Streamer queue/state apply | Immutable ephemeral value | One refresh |
 | Internal control | Per-frame lane limits and boolean permits | Streamer configuration / `RenderBudgetScheduler` | Ordered streamer drains | Scheduler-owned counters | Main thread/frame |
 | Internal cache | Full-quality terrain Mesh/source | Loader terrain upgrade / `TerrainQualityMeshCache` | Revisited tile state | Cache-retained Mesh reference | Map session until eviction/reset |
+| Internal plan | Parsed chunks, typed focus and immutable chunk-LOD policy | Loader / `TerrainChunkLodPlanner` | Loader desired state | Fresh dictionary; no retained resources | One target refresh |
+| Internal plan | Current/desired chunk state and typed focus | Loader / `TerrainChunkGeometryQueuePlanner` | Loader chunk queues | Fresh request arrays; no retained resources | One queue rebuild |
 | Output | Desired tile/detail operations | Streamer plan application | Finalize queues | Loader-owned | Cross-frame |
 | Output | Terrain/M2/WMO/liquid instances | Loader/builders | Godot world/renderer | Loader/world owner | Main-thread attach |
 | Output | Detached renderer metrics | `WorldRenderFacade` | Capture/baseline tools | Caller-owned deep copy | On demand |
@@ -167,6 +175,10 @@ flowchart TD
     Parse --> R[Result queues]
     R --> TerrainCache[TerrainQualityMeshCache store]
     TerrainCache --> Revisit[Revisited tile state restore]
+    R --> ChunkLod[TerrainChunkLodPlanner]
+    ChunkLod --> DesiredChunkLod[Desired chunk LOD state]
+    DesiredChunkLod --> ChunkQueue[TerrainChunkGeometryQueuePlanner]
+    ChunkQueue --> B
     R --> B[RenderBudgetScheduler permits]
     B --> Terrain[Terrain attach/upgrade]
     B --> M2[M2 group/MultiMesh attach]
@@ -272,6 +284,12 @@ sequenceDiagram
 - `TerrainQualityMeshCache` owns only full-quality revisit Mesh references and
   LRU keys. The loader retains terrain tasks/results, tile state, source choice,
   cache versions and every material/Node/RID finalization side effect.
+- `TerrainChunkLodPlanner` is stateless and owns only call-local horizontal
+  distance calculations. The loader retains parsed chunks, desired state,
+  queues, budgets and all Mesh/Node/RID application side effects.
+- `TerrainChunkGeometryQueuePlanner` is stateless and owns only call-local
+  create/remove request calculation and sorting. The loader adopts the fresh
+  arrays and retains removal-first drains, budgets and render side effects.
 - Rendered-ground query results and diagnostic snapshots are caller-owned values;
   the facade never returns Mesh, Node, tile-state or queue references.
 - Loaded-mesh ground sampling is renderer diagnostics, not authoritative gameplay
@@ -348,6 +366,12 @@ Exact exported settings and cache versions remain documented in [`../../RENDER.m
 - Unit/contract tests: streaming-focus contract/wiring, material mapping, unique-ID dedupe, placement probes, baseline manifest, five-point coordinate calibration, synthetic perceptual checkpoint diff, camera-pose grid plan.
 - Pure planner contract: center/corner/catalog/clamp/editor cases plus bounded
   High-like iteration timing without loading a world scene.
+- Terrain chunk LOD contract: horizontal chunk-center distance, inclusive
+  thresholds, sparse indices, disabled/raw-custom policy, loader delegation and
+  bounded 250-by-256 planning without loading a world scene.
+- Terrain chunk geometry queue contract: current/desired comparison, tile-LOD
+  takeover, sparse origin fallback, stable removals, nearest creates, loader
+  drain boundary and bounded multi-tile timing without a world scene.
 - Budget scheduler contract: exact lane exhaustion, shared chunk removal/create
   priority, independent lanes, frame reset, invalid limits, terminal cancellation,
   dependency boundaries and bounded permit timing without loading a world scene.
@@ -387,6 +411,8 @@ Exact exported settings and cache versions remain documented in [`../../RENDER.m
 | Environment snapshot input | Implemented boundary / Partial fidelity | Immutable time contract, facade/controller delegation and checkpoint migration | Weather/indoor state and paired zone-transition fidelity remain |
 | Entity presentation commands | Implemented boundary / Prototype visuals | Versioned typed snapshot plus present/remove lifecycle and runtime service composition | Display/equipment/animation/effects and async scale path remain |
 | Terrain quality Mesh cache service | Implemented extraction | Scene-free admission/LRU/clear contract and loader delegation | Remaining terrain build/state/finalization is monolithic |
+| Terrain chunk LOD planner | Implemented extraction | Scene-free formula/dependency/timing contract and loader delegation | Queue/state/finalization and asset-backed p95/p99 remain pending |
+| Terrain chunk geometry queue planner | Implemented extraction | Scene-free request/order/dependency/timing contract and loader delegation | Queue drains/state/finalization and asset-backed p95/p99 remain pending |
 | Pure streaming target planner | Implemented | `M03-RND-STREAMING-PLANNER-001` asset-free contract/performance regression | Queue scheduling and loaded-tile LOD application remain in streamer |
 | Bounded render budget scheduler | Implemented | `M03-RND-SCHEDULER-001` asset-free permit/cancellation/performance regression | Queue storage, worker concurrency and operation execution remain in streamer/services |
 | Gameplay/editor/tool internal-access boundary | Implemented | Access gate scans gameplay, EditorPlugin packages and terrain probe against actual private streamer declarations | Add future renderer diagnostic tools explicitly to the protected list |

src/render/terrain/terrain_chunk_geometry_queue_planner.gd

@@ -0,0 +1,102 @@
+class_name TerrainChunkGeometryQueuePlanner
+extends RefCounted
+
+## Pure desired-operation planner for terrain chunk geometry queues.
+
+const GODOT_WORLD_POSITION_SCRIPT := preload(
+	"res://src/domain/coordinates/godot_world_position.gd"
+)
+
+
+## Returns fresh nearest-first create and stable-order remove request arrays.
+## The caller retains queue storage, execution order and every render side effect.
+func plan(tile_states: Dictionary, focus_position: RefCounted) -> Dictionary:
+	var chunk_create_requests: Array = []
+	var chunk_remove_requests: Array = []
+	if (
+		focus_position == null
+		or focus_position.get_script() != GODOT_WORLD_POSITION_SCRIPT
+	):
+		return _create_plan(chunk_create_requests, chunk_remove_requests)
+
+	var focus_x_units := float(focus_position.get("x_units"))
+	var focus_z_units := float(focus_position.get("z_units"))
+	for tile_key_variant in tile_states.keys():
+		var tile_key := String(tile_key_variant)
+		var tile_state: Dictionary = tile_states[tile_key_variant]
+		var current_chunks: Dictionary = tile_state["chunks"]
+		var desired_lods: Dictionary = tile_state["desired_lods"]
+		var desired_tile_lod := int(tile_state.get("desired_tile_lod", -1))
+
+		if desired_tile_lod >= 0:
+			for chunk_id in current_chunks.keys():
+				chunk_remove_requests.append({"tile": tile_key, "chunk": chunk_id})
+			continue
+
+		for chunk_id in current_chunks.keys():
+			if not desired_lods.has(chunk_id):
+				chunk_remove_requests.append({"tile": tile_key, "chunk": chunk_id})
+				continue
+			if int(current_chunks[chunk_id]["lod"]) != int(desired_lods[chunk_id]):
+				chunk_create_requests.append(_create_chunk_request(
+					tile_key,
+					chunk_id,
+					int(desired_lods[chunk_id]),
+					_resolve_chunk_origin(tile_state, int(chunk_id)),
+					focus_x_units,
+					focus_z_units
+				))
+
+		for chunk_id in desired_lods.keys():
+			if current_chunks.has(chunk_id):
+				continue
+			chunk_create_requests.append(_create_chunk_request(
+				tile_key,
+				chunk_id,
+				int(desired_lods[chunk_id]),
+				_resolve_chunk_origin(tile_state, int(chunk_id)),
+				focus_x_units,
+				focus_z_units
+			))
+
+	chunk_create_requests.sort_custom(func(
+			left_request: Dictionary,
+			right_request: Dictionary
+	) -> bool:
+		return float(left_request["dist_sq"]) < float(right_request["dist_sq"])
+	)
+	return _create_plan(chunk_create_requests, chunk_remove_requests)
+
+
+func _resolve_chunk_origin(tile_state: Dictionary, chunk_id: int) -> Vector3:
+	var chunks: Array = tile_state["data"].get("chunks", [])
+	if chunk_id >= 0 and chunk_id < chunks.size():
+		var chunk: Dictionary = chunks[chunk_id]
+		if not chunk.is_empty():
+			return chunk.get("origin", Vector3.ZERO)
+	return tile_state.get("origin", Vector3.ZERO)
+
+
+func _create_chunk_request(
+		tile_key: String,
+		chunk_id: Variant,
+		desired_lod: int,
+		chunk_origin: Vector3,
+		focus_x_units: float,
+		focus_z_units: float
+) -> Dictionary:
+	var delta_x_units := chunk_origin.x - focus_x_units
+	var delta_z_units := chunk_origin.z - focus_z_units
+	return {
+		"tile": tile_key,
+		"chunk": chunk_id,
+		"lod": desired_lod,
+		"dist_sq": delta_x_units * delta_x_units + delta_z_units * delta_z_units,
+	}
+
+
+func _create_plan(chunk_create_requests: Array, chunk_remove_requests: Array) -> Dictionary:
+	return {
+		"create_requests": chunk_create_requests,
+		"remove_requests": chunk_remove_requests,
+	}

src/render/terrain/terrain_chunk_geometry_queue_planner.gd.uid

@@ -0,0 +1 @@
+uid://ct1ar5inci34u

src/render/terrain/terrain_chunk_lod_planner.gd

@@ -0,0 +1,53 @@
+class_name TerrainChunkLodPlanner
+extends RefCounted
+
+## Pure linear desired-state planner for parsed ADT chunk records.
+
+const POLICY_SCRIPT := preload("res://src/render/terrain/terrain_chunk_lod_policy.gd")
+const GODOT_WORLD_POSITION_SCRIPT := preload("res://src/domain/coordinates/godot_world_position.gd")
+
+
+## Maps source chunk indices to LOD 0/1/2 using horizontal distance from the
+## typed focus to each chunk center. Empty/out-of-range chunks remain absent.
+func plan(
+		chunks: Array,
+		focus_position: RefCounted,
+		policy: RefCounted
+) -> Dictionary:
+	if (
+		focus_position == null
+		or focus_position.get_script() != GODOT_WORLD_POSITION_SCRIPT
+		or policy == null
+		or policy.get_script() != POLICY_SCRIPT
+		or not bool(policy.get("is_enabled"))
+	):
+		return {}
+
+	var chunk_size_units := float(policy.get("chunk_size_units"))
+	var lod0_radius_squared := (float(policy.get("lod0_radius_chunks")) * chunk_size_units) ** 2
+	var lod1_radius_squared := (float(policy.get("lod1_radius_chunks")) * chunk_size_units) ** 2
+	var lod2_radius_squared := (float(policy.get("lod2_radius_chunks")) * chunk_size_units) ** 2
+	var focus_x_units := float(focus_position.get("x_units"))
+	var focus_z_units := float(focus_position.get("z_units"))
+	var desired_lods: Dictionary = {}
+
+	for chunk_id in range(chunks.size()):
+		var chunk: Dictionary = chunks[chunk_id]
+		if chunk.is_empty():
+			continue
+		var origin: Vector3 = chunk.get("origin", Vector3.ZERO)
+		var center_x_units := origin.x + chunk_size_units * 0.5
+		var center_z_units := origin.z + chunk_size_units * 0.5
+		var delta_x_units := center_x_units - focus_x_units
+		var delta_z_units := center_z_units - focus_z_units
+		var distance_squared_units := (
+			delta_x_units * delta_x_units + delta_z_units * delta_z_units
+		)
+		if distance_squared_units <= lod0_radius_squared:
+			desired_lods[chunk_id] = 0
+		elif distance_squared_units <= lod1_radius_squared:
+			desired_lods[chunk_id] = 1
+		elif distance_squared_units <= lod2_radius_squared:
+			desired_lods[chunk_id] = 2
+
+	return desired_lods

src/render/terrain/terrain_chunk_lod_planner.gd.uid

@@ -0,0 +1 @@
+uid://x8simqkfctqw

src/render/terrain/terrain_chunk_lod_policy.gd

@@ -0,0 +1,45 @@
+class_name TerrainChunkLodPolicy
+extends RefCounted
+
+## Immutable snapshot of the streamer's chunk-terrain LOD configuration.
+
+var is_enabled: bool:
+	get:
+		return _is_enabled
+
+var lod0_radius_chunks: int:
+	get:
+		return _lod0_radius_chunks
+
+var lod1_radius_chunks: int:
+	get:
+		return _lod1_radius_chunks
+
+var lod2_radius_chunks: int:
+	get:
+		return _lod2_radius_chunks
+
+var chunk_size_units: float:
+	get:
+		return _chunk_size_units
+
+var _is_enabled: bool
+var _lod0_radius_chunks: int
+var _lod1_radius_chunks: int
+var _lod2_radius_chunks: int
+var _chunk_size_units: float
+
+
+## Captures one renderer configuration snapshot for a deterministic plan.
+func _init(
+		is_enabled_value: bool,
+		lod0_radius_chunks_value: int,
+		lod1_radius_chunks_value: int,
+		lod2_radius_chunks_value: int,
+		chunk_size_units_value: float
+) -> void:
+	_is_enabled = is_enabled_value
+	_lod0_radius_chunks = lod0_radius_chunks_value
+	_lod1_radius_chunks = lod1_radius_chunks_value
+	_lod2_radius_chunks = lod2_radius_chunks_value
+	_chunk_size_units = chunk_size_units_value

src/render/terrain/terrain_chunk_lod_policy.gd.uid

@@ -0,0 +1 @@
+uid://dmwi83dp52pa8

src/scenes/streaming/streaming_world_loader.gd

@@ -19,6 +19,11 @@ const ADT_TILE_COORDINATE_SCRIPT := preload("res://src/domain/coordinates/adt_ti
 const ADT_TILE_LOCAL_POSITION_SCRIPT := preload("res://src/domain/coordinates/adt_tile_local_position.gd")
 const RENDERED_GROUND_SAMPLE_SCRIPT := preload("res://src/render/terrain/rendered_ground_sample.gd")
 const TERRAIN_QUALITY_MESH_CACHE_SCRIPT := preload("res://src/render/terrain/terrain_quality_mesh_cache.gd")
+const TERRAIN_CHUNK_LOD_POLICY_SCRIPT := preload("res://src/render/terrain/terrain_chunk_lod_policy.gd")
+const TERRAIN_CHUNK_LOD_PLANNER_SCRIPT := preload("res://src/render/terrain/terrain_chunk_lod_planner.gd")
+const TERRAIN_CHUNK_GEOMETRY_QUEUE_PLANNER_SCRIPT := preload(
+	"res://src/render/terrain/terrain_chunk_geometry_queue_planner.gd"
+)
 const STREAMING_TARGET_PLANNER_SCRIPT := preload("res://src/render/streaming/streaming_target_planner.gd")
 const STREAMING_TARGET_POLICY_SCRIPT := preload("res://src/render/streaming/streaming_target_policy.gd")
 const RENDER_BUDGET_SCHEDULER_SCRIPT := preload("res://src/render/streaming/render_budget_scheduler.gd")
@@ -181,6 +186,10 @@ const QUALITY_HIGH := "High"
 
 var _builder
 var _streaming_target_planner := STREAMING_TARGET_PLANNER_SCRIPT.new()
+var _terrain_chunk_lod_planner := TERRAIN_CHUNK_LOD_PLANNER_SCRIPT.new()
+var _terrain_chunk_geometry_operation_planner := (
+	TERRAIN_CHUNK_GEOMETRY_QUEUE_PLANNER_SCRIPT.new()
+)
 var _map_dir := ""
 var _abs_map_dir := ""
 var _wdt_info: Dictionary = {}
@@ -797,6 +806,8 @@ func _refresh_streaming_targets_at(focus_pos: Vector3, force: bool) -> void:
 
 func _apply_streaming_target(wanted_tiles: Dictionary, retained_tiles: Dictionary, focus_pos: Vector3) -> void:
 	_last_focus_pos = focus_pos
+	var typed_focus_position = GODOT_WORLD_POSITION_SCRIPT.new(focus_pos.x, focus_pos.y, focus_pos.z)
+	var terrain_chunk_lod_policy = _create_terrain_chunk_lod_policy()
 
 	var filtered_load_queue: Array = []
 	for request in _tile_load_queue:
@@ -831,7 +842,7 @@ func _apply_streaming_target(wanted_tiles: Dictionary, retained_tiles: Dictionar
 		state["wanted"] = wanted
 		state["retained"] = retained
 		if wanted:
-			state["desired_lods"] = _compute_desired_lods(state, focus_pos)
+			state["desired_lods"] = _compute_desired_lods(state, typed_focus_position, terrain_chunk_lod_policy)
 			state["desired_tile_lod"] = -1 if not state["desired_lods"].is_empty() else _compute_desired_tile_lod(state, focus_pos)
 			state["desired_tile_lod_visible"] = _compute_desired_tile_lod_visible(state, focus_pos)
 		elif retained:
@@ -852,34 +863,29 @@ func _apply_streaming_target(wanted_tiles: Dictionary, retained_tiles: Dictionar
 	_rebuild_chunk_queues()
 
 
-func _chunk_origin_for(state: Dictionary, chunk_id: int) -> Vector3:
-	var chunks: Array = state["data"].get("chunks", [])
-	if chunk_id >= 0 and chunk_id < chunks.size():
-		var c: Dictionary = chunks[chunk_id]
-		if not c.is_empty():
-			return c.get("origin", Vector3.ZERO)
-	return state.get("origin", Vector3.ZERO)
-
-
 func _rebuild_chunk_queues() -> void:
-	_chunk_remove_queue.clear()
-	_chunk_create_queue.clear()
+	var typed_focus_position = GODOT_WORLD_POSITION_SCRIPT.new(
+		_last_focus_pos.x,
+		_last_focus_pos.y,
+		_last_focus_pos.z
+	)
+	var chunk_queue_plan: Dictionary = _terrain_chunk_geometry_operation_planner.plan(
+		_tile_states,
+		typed_focus_position
+	)
+	_chunk_remove_queue = chunk_queue_plan.get("remove_requests", [])
+	_chunk_create_queue = chunk_queue_plan.get("create_requests", [])
 	_tile_lod_remove_queue.clear()
 	_tile_lod_create_queue.clear()
 
 	for key in _tile_states.keys():
 		var state: Dictionary = _tile_states[key]
-		var current_chunks: Dictionary = state["chunks"]
-		var desired_lods: Dictionary = state["desired_lods"]
 		var current_tile_lod: int = int(state.get("tile_lod", -1))
 		var desired_tile_lod: int = int(state.get("desired_tile_lod", -1))
 		var current_tile_lod_visible: bool = bool(state.get("tile_lod_visible", false))
 		var desired_tile_lod_visible: bool = bool(state.get("desired_tile_lod_visible", false))
 
 		if desired_tile_lod >= 0:
-			for chunk_id in current_chunks.keys():
-				_chunk_remove_queue.append({"tile": key, "chunk": chunk_id})
-
 			if current_tile_lod != desired_tile_lod or current_tile_lod_visible != desired_tile_lod_visible:
 				_tile_lod_create_queue.append({
 					"tile": key,
@@ -900,37 +906,7 @@ func _rebuild_chunk_queues() -> void:
 		if current_tile_lod >= 0 and _is_tile_chunk_set_ready(state):
 			_tile_lod_remove_queue.append({"tile": key})
 
-		for chunk_id in current_chunks.keys():
-			if not desired_lods.has(chunk_id):
-				_chunk_remove_queue.append({"tile": key, "chunk": chunk_id})
-				continue
-			if current_chunks[chunk_id]["lod"] != desired_lods[chunk_id]:
-				var lod_change_origin: Vector3 = _chunk_origin_for(state, chunk_id)
-				var dx2: float = lod_change_origin.x - _last_focus_pos.x
-				var dz2: float = lod_change_origin.z - _last_focus_pos.z
-				_chunk_create_queue.append({
-					"tile":    key,
-					"chunk":   chunk_id,
-					"lod":     desired_lods[chunk_id],
-					"dist_sq": dx2 * dx2 + dz2 * dz2,
-				})
-
-		for chunk_id in desired_lods.keys():
-			if current_chunks.has(chunk_id):
-				continue
-			var chunk_origin: Vector3 = _chunk_origin_for(state, chunk_id)
-			var dx: float = chunk_origin.x - _last_focus_pos.x
-			var dz: float = chunk_origin.z - _last_focus_pos.z
-			_chunk_create_queue.append({
-				"tile":    key,
-				"chunk":   chunk_id,
-				"lod":     desired_lods[chunk_id],
-				"dist_sq": dx * dx + dz * dz,
-			})
-
-	# Sort after fully rebuilding so nearest chunks are processed first
-	_chunk_create_queue.sort_custom(func(a: Dictionary, b: Dictionary) -> bool:
-		return a["dist_sq"] < b["dist_sq"])
+	# Sort tile LOD creates after fully rebuilding; chunk creates arrive nearest-first.
 	_tile_lod_create_queue.sort_custom(func(a: Dictionary, b: Dictionary) -> bool:
 		return a["dist_sq"] < b["dist_sq"])
 
@@ -2492,7 +2468,16 @@ func _finalize_loaded_tile(request: Dictionary, data: Dictionary) -> void:
 	}
 
 	# Use _last_focus_pos — already set correctly for both editor and game.
-	state["desired_lods"] = _compute_desired_lods(state, _last_focus_pos)
+	var typed_focus_position = GODOT_WORLD_POSITION_SCRIPT.new(
+		_last_focus_pos.x,
+		_last_focus_pos.y,
+		_last_focus_pos.z
+	)
+	state["desired_lods"] = _compute_desired_lods(
+		state,
+		typed_focus_position,
+		_create_terrain_chunk_lod_policy()
+	)
 	state["desired_tile_lod"] = -1 if not state["desired_lods"].is_empty() else _compute_desired_tile_lod(state, _last_focus_pos)
 	state["desired_tile_lod_visible"] = _compute_desired_tile_lod_visible(state, _last_focus_pos)
 	_tile_states[key] = state
@@ -3045,33 +3030,23 @@ func _reset_terrain_root_children() -> void:
 		child.free()
 
 
-func _compute_desired_lods(state: Dictionary, cam_pos: Vector3) -> Dictionary:
-	if not use_chunk_terrain_lods:
-		return {}
-
-	var desired := {}
+func _compute_desired_lods(
+		state: Dictionary,
+		typed_focus_position: RefCounted,
+		terrain_chunk_lod_policy: RefCounted
+) -> Dictionary:
 	var chunks: Array = state["data"].get("chunks", [])
+	return _terrain_chunk_lod_planner.plan(chunks, typed_focus_position, terrain_chunk_lod_policy)
 
-	var lod0_sq: float = (lod0_radius_chunks * CHUNK_SIZE) ** 2
-	var lod1_sq: float = (lod1_radius_chunks * CHUNK_SIZE) ** 2
-	var lod2_sq: float = (lod2_radius_chunks * CHUNK_SIZE) ** 2
 
-	for chunk_id in range(chunks.size()):
-		var chunk: Dictionary = chunks[chunk_id]
-		if chunk.is_empty():
-			continue
-
-		var origin: Vector3 = chunk.get("origin", Vector3.ZERO)
-		var center := origin + Vector3(CHUNK_SIZE * 0.5, 0.0, CHUNK_SIZE * 0.5)
-		var dx := center.x - cam_pos.x
-		var dz := center.z - cam_pos.z
-		var dist_sq := dx * dx + dz * dz
-
-		if   dist_sq <= lod0_sq: desired[chunk_id] = 0
-		elif dist_sq <= lod1_sq: desired[chunk_id] = 1
-		elif dist_sq <= lod2_sq: desired[chunk_id] = 2
-
-	return desired
+func _create_terrain_chunk_lod_policy() -> RefCounted:
+	return TERRAIN_CHUNK_LOD_POLICY_SCRIPT.new(
+		use_chunk_terrain_lods,
+		lod0_radius_chunks,
+		lod1_radius_chunks,
+		lod2_radius_chunks,
+		CHUNK_SIZE
+	)
 
 
 func _runtime_load_tile_radius() -> int:

src/tools/verify_terrain_chunk_geometry_queue_planner.gd

@@ -0,0 +1,169 @@
+extends SceneTree
+
+## Asset-free semantic, dependency and timing regression for chunk queue planning.
+
+const PLANNER_SCRIPT := preload(
+	"res://src/render/terrain/terrain_chunk_geometry_queue_planner.gd"
+)
+const POSITION_SCRIPT := preload("res://src/domain/coordinates/godot_world_position.gd")
+const LOADER_PATH := "res://src/scenes/streaming/streaming_world_loader.gd"
+
+
+func _initialize() -> void:
+	var failures: Array[String] = []
+	_verify_create_remove_and_order(failures)
+	_verify_tile_lod_removes_all(failures)
+	_verify_fallback_origin_and_vertical_invariance(failures)
+	_verify_invalid_focus(failures)
+	_verify_loader_boundary(failures)
+	var elapsed_milliseconds := _verify_bounded_timing(failures)
+	if not failures.is_empty():
+		for failure in failures:
+			push_error("TERRAIN_CHUNK_GEOMETRY_QUEUE_PLANNER: %s" % failure)
+		quit(1)
+		return
+	print(
+		"TERRAIN_CHUNK_GEOMETRY_QUEUE_PLANNER PASS cases=8 iterations=100 elapsed_ms=%.3f"
+		% elapsed_milliseconds
+	)
+	quit(0)
+
+
+func _verify_create_remove_and_order(failures: Array[String]) -> void:
+	var planner: RefCounted = PLANNER_SCRIPT.new()
+	var tile_states := {
+		"A": _create_tile_state(
+			{0: {"lod": 0}, 1: {"lod": 1}, 3: {"lod": 0}},
+			{0: 0, 1: 2, 2: 1},
+			[
+				{"origin": Vector3(100.0, 0.0, 0.0)},
+				{"origin": Vector3(30.0, 8000.0, 0.0)},
+				{"origin": Vector3(10.0, -8000.0, 0.0)},
+			]
+		),
+		"B": _create_tile_state({5: {"lod": 0}}, {}, []),
+	}
+	var plan: Dictionary = planner.call("plan", tile_states, POSITION_SCRIPT.new(0.0, 50.0, 0.0))
+	var creates: Array = plan["create_requests"]
+	var removes: Array = plan["remove_requests"]
+	_expect_equal(creates.size(), 2, "missing and mismatched chunks create", failures)
+	_expect_equal(int(creates[0]["chunk"]), 2, "nearest missing chunk first", failures)
+	_expect_equal(int(creates[1]["chunk"]), 1, "farther LOD mismatch second", failures)
+	_expect_equal(int(creates[1]["lod"]), 2, "mismatch uses desired LOD", failures)
+	_expect_equal(removes.size(), 2, "undesired current chunks remove", failures)
+	_expect_string_equal(String(removes[0]["tile"]), "A", "stable tile removal order", failures)
+	_expect_equal(int(removes[0]["chunk"]), 3, "first undesired chunk", failures)
+	_expect_equal(int(removes[1]["chunk"]), 5, "second tile undesired chunk", failures)
+
+
+func _verify_tile_lod_removes_all(failures: Array[String]) -> void:
+	var tile_state := _create_tile_state({7: {"lod": 0}, 8: {"lod": 1}}, {7: 0}, [])
+	tile_state["desired_tile_lod"] = 3
+	var plan: Dictionary = PLANNER_SCRIPT.new().call(
+		"plan",
+		{"tile": tile_state},
+		POSITION_SCRIPT.new(0.0, 0.0, 0.0)
+	)
+	_expect_true((plan["create_requests"] as Array).is_empty(), "tile LOD suppresses chunk creates", failures)
+	_expect_equal((plan["remove_requests"] as Array).size(), 2, "tile LOD removes every chunk", failures)
+
+
+func _verify_fallback_origin_and_vertical_invariance(failures: Array[String]) -> void:
+	var tile_state := _create_tile_state({}, {9: 1}, [])
+	tile_state["origin"] = Vector3(4.0, 99999.0, 3.0)
+	var plan: Dictionary = PLANNER_SCRIPT.new().call(
+		"plan",
+		{"fallback": tile_state},
+		POSITION_SCRIPT.new(0.0, -99999.0, 0.0)
+	)
+	var request: Dictionary = (plan["create_requests"] as Array)[0]
+	_expect_near(float(request["dist_sq"]), 25.0, "fallback origin uses horizontal distance", failures)
+
+
+func _verify_invalid_focus(failures: Array[String]) -> void:
+	var plan: Dictionary = PLANNER_SCRIPT.new().call("plan", {}, null)
+	_expect_true((plan["create_requests"] as Array).is_empty(), "invalid focus create empty", failures)
+	_expect_true((plan["remove_requests"] as Array).is_empty(), "invalid focus remove empty", failures)
+
+
+func _verify_loader_boundary(failures: Array[String]) -> void:
+	var source := _read_text(LOADER_PATH, failures)
+	_expect_true(source.contains("TERRAIN_CHUNK_GEOMETRY_QUEUE_PLANNER_SCRIPT.new()"), "loader composes planner", failures)
+	_expect_true(source.contains("_terrain_chunk_geometry_operation_planner.plan("), "loader delegates plan", failures)
+	_expect_true(not source.contains("func _chunk_origin_for("), "loader omits chunk-origin planning", failures)
+	_expect_true(source.contains("_remove_chunk(_chunk_remove_queue.pop_back())"), "loader retains removal-first drain", failures)
+	_expect_true(source.contains("_create_chunk(_chunk_create_queue.pop_front())"), "loader retains nearest-first drain", failures)
+
+
+func _verify_bounded_timing(failures: Array[String]) -> float:
+	var tile_states: Dictionary = {}
+	for tile_index in range(64):
+		var current_chunks: Dictionary = {}
+		var desired_lods: Dictionary = {}
+		var parsed_chunks: Array = []
+		for chunk_index in range(16):
+			current_chunks[chunk_index] = {"lod": chunk_index % 3}
+			desired_lods[chunk_index] = (chunk_index + 1) % 3
+			parsed_chunks.append({
+				"origin": Vector3(float(tile_index * 16 + chunk_index), 0.0, float(tile_index))
+			})
+		tile_states["tile-%d" % tile_index] = _create_tile_state(
+			current_chunks,
+			desired_lods,
+			parsed_chunks
+		)
+	var planner: RefCounted = PLANNER_SCRIPT.new()
+	var focus: RefCounted = POSITION_SCRIPT.new(0.0, 0.0, 0.0)
+	var started_microseconds := Time.get_ticks_usec()
+	for _iteration in range(100):
+		planner.call("plan", tile_states, focus)
+	var elapsed_milliseconds := float(Time.get_ticks_usec() - started_microseconds) / 1000.0
+	_expect_true(elapsed_milliseconds < 1000.0, "100 multi-tile plans remain bounded", failures)
+	return elapsed_milliseconds
+
+
+func _create_tile_state(
+		current_chunks: Dictionary,
+		desired_lods: Dictionary,
+		parsed_chunks: Array
+) -> Dictionary:
+	return {
+		"chunks": current_chunks,
+		"desired_lods": desired_lods,
+		"desired_tile_lod": -1,
+		"data": {"chunks": parsed_chunks},
+		"origin": Vector3.ZERO,
+	}
+
+
+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: int, expected_value: int, label: String, failures: Array[String]) -> void:
+	if actual_value != expected_value:
+		failures.append("%s expected %d, got %d" % [label, expected_value, actual_value])
+
+
+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_string_equal(
+		actual_value: String,
+		expected_value: String,
+		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_terrain_chunk_geometry_queue_planner.gd.uid

@@ -0,0 +1 @@
+uid://dcimxvm2atvst

src/tools/verify_terrain_chunk_lod_planner.gd

@@ -0,0 +1,96 @@
+extends SceneTree
+
+## Asset-free formula, dependency and bounded timing regression for chunk LOD.
+
+const PLANNER_SCRIPT := preload("res://src/render/terrain/terrain_chunk_lod_planner.gd")
+const POLICY_SCRIPT := preload("res://src/render/terrain/terrain_chunk_lod_policy.gd")
+const POSITION_SCRIPT := preload("res://src/domain/coordinates/godot_world_position.gd")
+const LOADER_PATH := "res://src/scenes/streaming/streaming_world_loader.gd"
+
+
+func _initialize() -> void:
+	var failures: Array[String] = []
+	_verify_formula(failures)
+	_verify_disabled_and_custom_policy(failures)
+	_verify_loader_boundary(failures)
+	var elapsed_milliseconds := _verify_bounded_timing(failures)
+	if not failures.is_empty():
+		for failure in failures:
+			push_error("TERRAIN_CHUNK_LOD_PLANNER: %s" % failure)
+		quit(1)
+		return
+	print("TERRAIN_CHUNK_LOD_PLANNER PASS cases=7 iterations=250 elapsed_ms=%.3f" % elapsed_milliseconds)
+	quit(0)
+
+
+func _verify_formula(failures: Array[String]) -> void:
+	var planner: RefCounted = PLANNER_SCRIPT.new()
+	var policy: RefCounted = POLICY_SCRIPT.new(true, 1, 2, 3, 10.0)
+	var focus: RefCounted = POSITION_SCRIPT.new(0.0, 9999.0, 0.0)
+	var chunks: Array = [
+		{"origin": Vector3(-5.0, 2000.0, -5.0)},
+		{"origin": Vector3(5.0, -3000.0, -5.0)},
+		{"origin": Vector3(5.001, 0.0, -5.0)},
+		{"origin": Vector3(15.0, 0.0, -5.0)},
+		{"origin": Vector3(20.0, 0.0, -5.0)},
+		{"origin": Vector3(25.0, 0.0, -5.0)},
+		{"origin": Vector3(25.001, 0.0, -5.0)},
+		{},
+	]
+	var desired: Dictionary = planner.call("plan", chunks, focus, policy)
+	_expect_equal(int(desired.get(0, -1)), 0, "center ignores vertical distance", failures)
+	_expect_equal(int(desired.get(1, -1)), 0, "lod0 inclusive boundary", failures)
+	_expect_equal(int(desired.get(2, -1)), 1, "just outside lod0", failures)
+	_expect_equal(int(desired.get(3, -1)), 1, "lod1 inclusive boundary", failures)
+	_expect_equal(int(desired.get(4, -1)), 2, "between lod1 and lod2", failures)
+	_expect_equal(int(desired.get(5, -1)), 2, "lod2 inclusive boundary", failures)
+	_expect_true(not desired.has(6) and not desired.has(7), "outside and sparse chunks absent", failures)
+
+
+func _verify_disabled_and_custom_policy(failures: Array[String]) -> void:
+	var planner: RefCounted = PLANNER_SCRIPT.new()
+	var focus: RefCounted = POSITION_SCRIPT.new(0.0, 0.0, 0.0)
+	var chunks: Array = [{"origin": Vector3(-5.0, 0.0, -5.0)}]
+	_expect_true((planner.call("plan", chunks, focus, POLICY_SCRIPT.new(false, 1, 2, 3, 10.0)) as Dictionary).is_empty(), "disabled policy empty", failures)
+	var negative_policy: RefCounted = POLICY_SCRIPT.new(true, -1, -2, -3, 10.0)
+	_expect_equal(int((planner.call("plan", chunks, focus, negative_policy) as Dictionary).get(0, -1)), 0, "negative radius keeps squared semantics", failures)
+
+
+func _verify_loader_boundary(failures: Array[String]) -> void:
+	var source := _read_text(LOADER_PATH, failures)
+	_expect_true(source.contains("TERRAIN_CHUNK_LOD_PLANNER_SCRIPT.new()"), "loader composes planner", failures)
+	_expect_true(source.contains("_terrain_chunk_lod_planner.plan(chunks, typed_focus_position, terrain_chunk_lod_policy)"), "loader delegates plan", failures)
+	_expect_true(not source.contains("dist_sq <= lod0_sq"), "loader omits chunk LOD formula", failures)
+
+
+func _verify_bounded_timing(failures: Array[String]) -> float:
+	var planner: RefCounted = PLANNER_SCRIPT.new()
+	var policy: RefCounted = POLICY_SCRIPT.new(true, 10, 20, 40, 33.333333)
+	var focus: RefCounted = POSITION_SCRIPT.new(1000.0, 0.0, 1000.0)
+	var chunks: Array = []
+	for chunk_index in range(256):
+		chunks.append({"origin": Vector3(float(chunk_index % 16) * 33.333333, 0.0, float(chunk_index / 16) * 33.333333)})
+	var started_microseconds := Time.get_ticks_usec()
+	for _iteration in range(250):
+		planner.call("plan", chunks, focus, policy)
+	var elapsed_milliseconds := float(Time.get_ticks_usec() - started_microseconds) / 1000.0
+	_expect_true(elapsed_milliseconds < 1000.0, "250 plans remain bounded", failures)
+	return elapsed_milliseconds
+
+
+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: int, expected_value: int, label: String, failures: Array[String]) -> void:
+	if actual_value != expected_value:
+		failures.append("%s expected %d, got %d" % [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_terrain_chunk_lod_planner.gd.uid

@@ -0,0 +1 @@
+uid://2oljbpoxndx3

targets/03-renderer-facade.md

@@ -27,10 +27,11 @@ Runtime и Editor используют facade; planner/scheduler тестиру
 ## Evidence
 
 - Date: 2026-07-16
-- Revision/worktree: master merges `7ece2ab`, `7e35de7`, `80cb084`, `d6e5b53`, `c69abd6`, `606770c`, `630a0c1`;
+- Revision/worktree: master merges `7ece2ab`, `7e35de7`, `80cb084`, `d6e5b53`, `c69abd6`, `606770c`, `630a0c1`, `f36fabb`, `24aef13`;
   packages `M03-RND-SCHEDULER-001`, `M03-RND-INTERNAL-ACCESS-GATE-001`,
   `M03-RND-FACADE-GROUND-QUERY-001`, `M03-RND-FACADE-ENVIRONMENT-001`,
-  `M03-RND-FACADE-ENTITY-001`, `M03-RND-TERRAIN-CACHE-SERVICE-001`
+  `M03-RND-FACADE-ENTITY-001`, `M03-RND-TERRAIN-CACHE-SERVICE-001`,
+  `M03-RND-TERRAIN-LOD-PLANNER-001`, `M03-RND-TERRAIN-CHUNK-QUEUE-001`
 - Commands: dedicated scheduler/planner/facade/focus/coordinate/manifest/shutdown
   headless verifiers; Godot cold editor parse; coordination, documentation and diff gates.
 - Results: scheduler `cases=6 iterations=20000 elapsed_ms=10.216`; planner
@@ -47,6 +48,11 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   `delegation=9 entity_contract=6`, while character presentation remained `9/10/3/1`.
   Terrain quality cache passed `contract_cases=15 loader_calls=3`; internal-access
   inventory decreased to `42` because the loader no longer owns the LRU-order field.
+  Terrain chunk LOD planner passed `cases=7 iterations=250 elapsed_ms=12.630`;
+  post-merge facade, internal-access and `7/7` manifest gates remained green.
+  Terrain chunk geometry queue planner passed `cases=8 iterations=100
+  elapsed_ms=229.324`; internal-access remained `42` and post-merge facade and
+  `7/7` manifest gates stayed green.
   M02 terrain-query regression
   remained green (13 pre-existing expired M00 claim warnings).
 - Fidelity comparison: all 16 historical operation limits and drain sites were
@@ -60,6 +66,11 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   baseline plans remain unchanged by the new present/remove ownership boundary.
   Terrain revisit cache retains the same admitted/excluded sources, LRU touch/trim,
   profile capacities and three loader adapter sites; no cache format changed.
+  Chunk LOD keeps horizontal XZ chunk-center distance, inclusive squared thresholds,
+  sparse-index omission and raw negative-radius squaring at both loader call sites.
+  Chunk operation planning preserves stable removals, nearest-first create sorting,
+  tile-LOD remove-all takeover, sparse tile-origin fallback and XZ-only distance;
+  loader still drains removals first through the shared `chunk_geometry` budget.
   No new build-12340 parity claim is made; asset-backed visual/p95/p99 comparison remains pending.
 - Changed files: scene-free scheduler and verifier; streamer budget composition/
   permit delegation; scheduler module spec; world renderer/module registry/RENDER notes;
@@ -67,6 +78,8 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   immutable environment snapshot, facade/sky adapter, migrated checkpoint time input,
   contract-v1 entity snapshot, renderer-owned entity presenter, runtime composition,
   scene-free terrain quality Mesh cache and loader store/restore/clear adapters,
+  immutable terrain chunk LOD policy, pure planner and both loader plan adapters,
+  pure terrain chunk geometry queue planner and loader queue-adoption adapter,
   expanded facade/internal-access/coordinate verifiers; work-package claims and this evidence.
 - Remaining risks: queue storage length and worker concurrency/stale-result logic
   remain streamer-owned; cancellation stops new permits but does not interrupt
@@ -74,5 +87,8 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   or indoor state; entity PackedScene loading is synchronous and not accepted for
   network-scale hot paths; terrain cache is entry-count bounded without Mesh-byte
   metrics and the remaining terrain build/tasks/state/finalization stay monolithic;
+  chunk LOD asset-backed p95/p99 and visual acceptance remain pending;
+  chunk queue planning adds a second tile-state pass whose asset-backed p95/p99
+  still needs acceptance, while queue drains and geometry finalization remain monolithic;
   M03 still needs further terrain/M2/WMO/liquid service extraction
   and dependency/performance acceptance.