wip(unreal): VoxelForgeCore UBT module + asset adapter reproduce the standalone world

Luna, integration round 1 (BuildHost only; owner's project and assets untouched):
- New runtime module VoxelForgeCore: one shim per Standalone/Core/core_sources.txt row
  (sources stay canonical under Standalone/), NoPCH/no unity, manifest check; VoxelForge
  links it (no runtime routing yet). UE link-safety audit: 18 shims, 83,843 symbol lines
  vs 399 Unreal-style names, 0 clashes.
- Adapter (editor commandlet path) turns staged copies of the owner's DA_* assets into
  schema-v1 JSON; with clip_radius=3/max_clip_level=8 it reproduces all four Core hashes
  (0xdb2991c73215af4c, 0x8236c5edd7fc8e4f, 0x4c48fa75a543d58e, 0xbea22e76b34a4dfc) and
  walkability 5,642/5,642 at worker limits 1, 8 and 16.
- Noted: the owner's settings asset says max clip level 6 (standalone used 8); Core uses
  25 cm voxels vs the plugin runtime's 12.5 cm.
Not done yet: AVoxelWorld switch and Core runtime route (round 2).
Docs: CODEMAP, ARCHITECTURE, SHARED_CPP_LIBRARY_PLAN, UNREAL_INTEGRATION_REPORT.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MmSoF64BbRFmk9C3p1VsBJ

ARCHITECTURE.md

@@ -1065,6 +1065,43 @@ timings are intentionally diagnostic metadata and do not affect world or image c
 viewer remains a separate display-only consumer: it must load this OBJ/manifest and never evaluate
 density or generate geometry.
 
+### 8.17 Standalone Core in Unreal — integration round 1
+**Status (2026-10-08):** the `VoxelForgeCore` runtime module and manifest shims build and link in the
+isolated BuildHost. The editor commandlet can adapt the owner's copied settings/strate assets into
+schema-v1 JSON, resolve it through `ResolvedWorldSnapshot::FromJson`, and reproduce the standalone
+hashes at compile worker limits 1, 8, and 16. This has not yet changed the `AVoxelWorld` generation
+route. There is no `bUseVoxelForgeCore` property, and no world should be switched yet.
+
+The commandlet adapter is game-thread-only: it resolves UObjects and soft references, writes stable
+property/map/set order, and emits values rather than UObject pointers. It writes the standalone
+schema scale of 25 cm per voxel. The plugin's existing Runtime generator still defines
+`VOXEL_SIZE=12.5 cm`, so a Core mesh-to-`FVoxelMeshData` bridge must define the coordinate/scale
+conversion before runtime use. The staged `DA_Settings` also says `MaxClipLevel=6`, while the
+standalone owner JSON says 8; hash validation keeps the authored JSON unchanged and applies the
+reference harness view (`clip_radius=3`, `max_clip_level=8`) only to its validation copy.
+
+The intended side-by-side runtime route is:
+
+1. Add `bUseVoxelForgeCore=false` to `AVoxelWorld`. The false branch must retain the existing field,
+mesher, output, streaming, and collision behavior.
+2. On the game thread, adapt owner assets to an immutable schema-v1 snapshot. Keep UObjects out of
+Core and worker data.
+3. On the Core branch, ask `World::desiredTiles` and `prioritizeTiles` for the target set/order;
+compile the initial field using a `JobScheduler` backed by Unreal's task system. The plugin still
+owns work admission, worker lifetime, cancellation, `bShuttingDown`, and the generation `Epoch`.
+4. Run `generateTile` on the plugin workers, explicitly reconcile Core centimetre positions with
+the Runtime voxel scale, then copy mesh arrays/groups into `FVoxelMeshData`. Let the existing
+`BuildTileStreamSet` → MPSC result → epoch check → RealtimeMesh upload/collision-cook path consume
+the result.
+5. For carving, drain Core calls on the current `World`, call `applyEditTransaction` with an
+authority sequence and ordered brushes, bump the epoch, and regenerate its returned desired tiles.
+Keep the current plugin behavior when the switch is false.
+
+The module-link and asset-adapter evidence, including the settings mismatch and incomplete runtime
+work, is recorded in [`Standalone/UNREAL_INTEGRATION_REPORT.md`](Standalone/UNREAL_INTEGRATION_REPORT.md).
+Keep every §8.10 streaming, cancellation, epoch, collision-handoff, and per-frame-budget invariant
+when implementing this route; Core does not own those systems.
+
 ## 9. Multiplayer model (listen-server first, dedicated-friendly)
 
 > **Status: transport is DESIGN ONLY — nothing is networked in-tree yet** (no `Replicated`/`HasAuthority`/RPCs; a

CODEMAP.md

@@ -5,7 +5,8 @@
 > as code is edited, so trust the **symbol name** first and the line as a hint.
 >
 > Plugin root: `Source/VoxelForge/` · ~8,300 lines of C++ across 25 files.
-> Comments in the code are mixed **French + English**. UE module = `VoxelForge` (Runtime).
+> Comments in the code are mixed **French + English**. UE modules: `VoxelForge` and
+> `VoxelForgeCore` (Runtime), plus `VoxelForgeEditor` (Editor).
 
 ---
 
@@ -143,12 +144,16 @@ remains `0`, and lateral regions remain gated off.
 ### 3.1 Module & build
 | File | Role |
 |------|------|
-| `../../VoxelForge.uplugin` | Plugin manifest. Runtime module `VoxelForge` plus the Editor-only `VoxelForgeEditor` commandlet module. Beta. |
+| `../../VoxelForge.uplugin` | Plugin manifest. Runtime modules `VoxelForge` and `VoxelForgeCore`, plus the Editor-only `VoxelForgeEditor` commandlet module. Beta. |
-| `VoxelForge.Build.cs` | Deps: Core, CoreUObject, Engine, **GameplayTags**, **RealtimeMeshComponent**. |
+| `VoxelForge.Build.cs` | Deps: Core, CoreUObject, Engine, **GameplayTags**, **RealtimeMeshComponent**, `VoxelForgeCore`. The Core dependency is linked; `AVoxelWorld` does not route through it yet. |
+| `../../VoxelForgeCore/VoxelForgeCore.Build.cs` | C++20 runtime module. Reads `Standalone/Core/core_sources.txt`, validates one include shim per canonical source, and fails UBT on missing, extra, or mismatched shims. No unity/PCH; private copied implementation stays under `vfcore::detail`. |
+| `../../VoxelForgeCore/Private/Manifest/VFCore_*.cpp` | Eighteen one-source UBT shims that include canonical files under `Standalone/`; they do not copy Core implementation. The API-boundary row includes `Core/src/VoxelForgeCore.cpp` directly. |
+| `../../VoxelForgeCore/Private/ModuleEntry/` | Unreal module entry and an isolated `CoreMinimal.h` shim for the actual engine header. |
+| `../../Standalone/Core/include/VoxelForgeCore/VoxelForgeCore.h` | Standard-library-only public Core API. `VOXELFORGECORE_API` exports the API from the Unreal module and is empty for standalone builds. |
 | `Tools/VoxelForgeTest.ps1` | The single guarded test entry point. `-Scenario canonical|owner|probe|perf|tests|surface-fall|crossing|gate-stress|visual-edit|visual-lod|visual-gap-walk|visual-gap-inject|dig-motion|parity|horizon|horizon-render|determinism|region-eval|step2d|step2e|step2f|step2f-capture|step3-scale|step3-game`, optional `-Build`, `-Assets owner|default`, `-Cvars`, absolute `-Out`, `-Label`, `-HorizonLevel`, `-HorizonRenderDistanceChunks`, `-Step2fProfile=0..7`, `-Step2fCaptureView=inside|wall-closeup`, `-ParityExportSize=32|64|128`, `-ParityExportTile=x,y,z`, `-SharedDDC`, `-SampleDensityStacks`, `-StackSampleIntervalUs`, and `-RegionHashProbe -RegionWorkers N -RegionReferenceHash HASH`; stages the host/assets, isolates user/DDC/config state, serializes one Unreal launch at a time, enforces the 8 GiB/30-minute guards, waits for 6 GiB free RAM before launches, and emits compact `result.json`/`summary.txt` plus full logs. Parity can render its game leg with `-EnableRender` and compares the selected export region against the exact streamed tile hashes. `visual-gap-walk` records camera-frustum surface-point coverage at 6000 cm/s; `visual-gap-inject` proves an early component hide is detected; `dig-motion` logs per-frame vertical velocity, gate, support readiness, and movement mode. `-Cvars @{ 'voxel.TestGapAuditLegacyHandoff'=1 }` replays the old visibility handoff for A/B audit baselines. Horizon traces report desired/loaded tiles, resident stream geometry, worker seconds, steady wall time, and peak private memory; `horizon-render` captures the owner view; `step2f-capture` selects one of eight parameter sets, finds a positive-density camera point and aims at a sampled rock wall for an inside or wall-closeup view, then saves it under `Saved/Research/step2f/captures` (pass the persistent render DDC with `-SharedDDC`); `determinism` compares per-tile hashes across the default CRT path and `-voxel.CrtFma3=0`; `region-eval` compares the live path with the default-off editor chunk program on the 259³ lattice and five-seed probe set; `step2d` retains the earlier independent field; `step2e` retains its earlier benchmark; `step2f` compares frozen step 2e and the coherent field for all eight profiles on the same 259³ ring, applies geometry gates, and checks sound bounds, seams, and 1-vs-6-worker hashes. `-RegionHashProbe -RegionWorkers N -RegionReferenceHash HASH` checks a full-ring hash at another partition count. `-SampleDensityStacks` captures profiles, and `-StackSampleIntervalUs` sets the sampling interval.
 | Step-3 scale and game validation | `step3-scale` measures the same 519³ and 259³ six-worker lattices at 12.5 cm. The cached medians are 7.347496 s and 1.169567 s respectively; determinism and brick sound-proof audits pass. `step3-game` routes in-game generation through the brick evaluator and records tile timings, spawn fill, moving frames, and profile-switch rebuilds. The visible D3D12 run measured tile generation p50/p95/max 3.326/31.045/169.867 ms, full-detail L0 fill 12.369 s for 2,765 tiles, and moving-frame p50/p95/p99/max 4.856/8.922/13.090/80.575 ms. Switching profiles rebuilt 5,815 loaded tiles. Both high-resolution screenshot requests were logged, but the harness found only one fresh PNG and it is a blank pale viewport; no lit comparison capture is accepted. Raw output: `Saved/TestHarness/step3_game_visible_final`; scale output: `Saved/Research/step3/scale/step3_scale_cacheperf_v1`. |
 | `Public/VoxelForgeModule.h` / `Private/VoxelForgeModule.cpp` | `FVoxelForgeModule` boilerplate (Startup/Shutdown just log). |
-| `Source/VoxelForgeEditor/VoxelForgeEditor.Build.cs` / `Private/VoxelForgeExploreCommandlet.*` | Editor/commandlet-only `-run=VoxelForgeExplore`; owns bounded render/`VF_` walk/OBJ export orchestration and is not linked by Game/Shipping. Optional `-exporttilex/y/z` sets an exact L0 tile origin for controlled export/game parity; omitting all three preserves the existing center-derived origin. `-regioneval=1` retains the exact-field step-2c research harness. `-step2d` and `-step2e` retain their earlier benchmarks. `-step2f` compares the metre-scaled step 2e baseline and the coherent field for all eight profiles on the same 259³ ring (32.25 m at this lattice), counts sub-1 m³ connected components in a 128-sample padded volume, measures mesh dihedrals, detail spectrum, LOD surface distance (p95 threshold 1 sample = 12.5 cm), chamber-pitch autocorrelation, roof/floor coverage, and six-worker timing. It also runs the sound/undersized-bound audit, seam injection, and 1-vs-6-worker hash checks and writes profile slices and JSON under `Saved/Research/step2f`. |
+| `Source/VoxelForgeEditor/VoxelForgeEditor.Build.cs` / `Private/VoxelForgeExploreCommandlet.*` | Editor/commandlet-only `-run=VoxelForgeExplore`; also depends on `VoxelForgeCore` for the schema-v1 owner-asset export check. `FStandaloneCoreAdapterScheduler` runs Core compile work at 1/8/16 workers; `VerifyStandaloneCoreAdapter` checks hashes and walkability without touching the game runtime. This is validation infrastructure, not the `AVoxelWorld` route. Existing bounded render/`VF_` walk/OBJ orchestration and research options remain editor/commandlet-only and are not linked by Game/Shipping. |
 | `Source/VoxelForgeEditor/Private/VoxelForgeRegionEvalExperiment.*` | Six-worker lattice drivers for step 2c through step 2f. The original path still compares live `GetDensityAt` with the editor chunk program. Research modes assign contiguous batches dynamically so surface-heavy work balances across workers; steps 2e and 2f use 4³ proof bricks and stage each evaluated brick before copying contiguous X rows, while step 2d retains 8³. Each skip requires a macro Lipschitz bound plus the complete final-detail supremum; uncertain bricks retain every 12.5 cm detail sample. Timings split classification, point evaluation, and uniform fill; step 2f compares all profiles and hashes workers 1 and 6. |
 | `Public/VoxelRedefinedDensityField.h` / `Private/VoxelRedefinedDensityField.cpp` | Two default-off `WITH_EDITOR` research fields, selected by `voxel.ResearchRedefinedDensityField` (step 2d) and `voxel.ResearchParameterizedCave` (steps 2e/2f). Step 2f retains a metre-scaled 2e baseline for its rejection audit. New profiles use strongly jittered, individually rotated elliptical rooms capped against nearest neighbors and curved cubic-Bezier passages with deterministic centerline and width variation along each edge. Room heights and feature rolls vary by cell; ledges, occasional pillars, stalactites/stalagmites, basin floors, and bounded hanging masses remain features. Point and brick detail sampling share independently rotated 96/48/24-sample bands and a smooth ridge response, preserving 12/6/3 m wavelengths at 12.5 cm per sample. The parameterized mesher evaluates the exact field through prepared 4³ bricks and the same sound skip proof in commandlet and editor-game meshing. In-editor and in-game profile changes invalidate and rebuild all loaded tiles. In an editor game with this field enabled, sealed-solid, out-of-layout, and outer-classifier verdicts are declined without changing their console switches. |
 | `Private/Tests/VoxelForgeParameterizedGenerationTest.cpp` | Separate three-seed functional sweep for the step 2f parameterized field; passage landing air/floor brackets and arrival-to-exit walking routes are checked without changing the live-world tests. |
@@ -815,6 +820,27 @@ second density path.
 | `VoxelForgeWormBlockSkipTest.cpp` | `VoxelForge.Determinism.WormBlockSkipSoundness` | Soundness and coverage of the worker-local worm N1 block proof (`voxel.WormBlockSkip`). |
 | `VoxelForgePlayerFitWindow.h` | — | Shared measurement-window policy for player-fit diagnostics (test/editor side only). |
 
+### 3.13 Core module and schema adapter (integration round 1)
+The public Core API is linked as the `VoxelForgeCore` runtime module, with canonical implementation
+sources still under `Standalone/`. UBT validates the 18-row manifest and its shims; BuildHost linked
+the module and passed `CheckCoreSymbols.ps1` against the actual shim objects. See
+[`Standalone/UNREAL_INTEGRATION_REPORT.md`](Standalone/UNREAL_INTEGRATION_REPORT.md) for build and
+headless evidence.
+
+`RunStandaloneWorldExport` in `VoxelForgeExploreCommandlet.cpp` serializes owner assets on the game
+thread to schema-v1 JSON. `FStandaloneCoreAdapterScheduler` and
+`VerifyStandaloneCoreAdapter` parse that JSON through `ResolvedWorldSnapshot::FromJson`, compile at
+worker limits 1, 8, and 16, and compare the 2,226-tile hashes and passage walkability. The commandlet
+sorts map/set members and JSON object keys to keep the export deterministic. Its test copy applies
+the standalone benchmark view overrides (clip radius 3, max level 8); the saved asset-derived export
+retains the authored clip radius and max level.
+
+**Runtime status:** no `bUseVoxelForgeCore` property, Core generation route, mesh conversion, Core
+carve transaction, or owner-facing switch instructions exist yet. `AVoxelWorld` still uses the
+existing density generator, mesher, queues, epoch checks, RealtimeMesh upload, and collision path.
+The Core dependency is present so the next round can wire the side-by-side route behind a default-off
+switch while preserving that path.
+
 ## 4. The density pipeline (most-edited hot path)
 
 ### 4.1 `GetDensityWithParams` (TunnelNetwork) — VoxelGenerator.cpp:3749

Source/VoxelForge/VoxelForge.Build.cs

@@ -79,6 +79,9 @@ public class VoxelForge : ModuleRules
 		// Private dependencies - only used in our .cpp files, not exposed in headers
 		PrivateDependencyModuleNames.AddRange(new string[]
 		{
+			// Core module is linked; runtime routing is not wired yet.
+			// Le module Core est lié; la génération Runtime ne l'utilise pas encore.
+			"VoxelForgeCore",
 			"Json",           // Diffable Tier 5 promoted-record and season-manifest stores
 			"ImageWrapper",  // PNG encode for the biome-map preview bake (BakeBiomePreview)
 			"RHI",           // Texture3D create + RHIUpdateTexture3D for the density volume (mini-sun shadows)

Source/VoxelForgeCore/Private/Manifest/VFCore_Compat_StandaloneDataAssetGlue_cpp.cpp

@@ -0,0 +1,7 @@
+// Private implementation symbols stay internal to the Core module. Les symboles restent internes.
+#define VFCORE_PRIVATE_IMPLEMENTATION 1
+#include "CoreNamespacePreamble.h"
+namespace vfcore::detail
+{
+#include "Compat/StandaloneDataAssetGlue.cpp"
+}

Source/VoxelForgeCore/Private/Manifest/VFCore_Compat_UnrealPerlin_cpp.cpp

@@ -0,0 +1,7 @@
+// Private implementation symbols stay internal to the Core module. Les symboles restent internes.
+#define VFCORE_PRIVATE_IMPLEMENTATION 1
+#include "CoreNamespacePreamble.h"
+namespace vfcore::detail
+{
+#include "Compat/UnrealPerlin.cpp"
+}

Source/VoxelForgeCore/Private/Manifest/VFCore_Core_src_VoxelForgeCore_cpp.cpp

@@ -0,0 +1,9 @@
+// The public API is standard-only; this UBT boundary supplies its module export token locally.
+#ifndef DLLEXPORT
+#if defined(_WIN32)
+#define DLLEXPORT __declspec(dllexport)
+#else
+#define DLLEXPORT __attribute__((visibility("default")))
+#endif
+#endif
+#include "Core/src/VoxelForgeCore.cpp"

Source/VoxelForgeCore/Private/Manifest/VFCore_Source_VoxelForge_Private_VoxelBiomeDefinition_cpp.cpp

@@ -0,0 +1,7 @@
+// Private implementation symbols stay internal to the Core module. Les symboles restent internes.
+#define VFCORE_PRIVATE_IMPLEMENTATION 1
+#include "CoreNamespacePreamble.h"
+namespace vfcore::detail
+{
+#include "Source/VoxelForge/Private/VoxelBiomeDefinition.cpp"
+}

Source/VoxelForgeCore/Private/Manifest/VFCore_Source_VoxelForge_Private_VoxelCaveMorphology_cpp.cpp

@@ -0,0 +1,7 @@
+// Private implementation symbols stay internal to the Core module. Les symboles restent internes.
+#define VFCORE_PRIVATE_IMPLEMENTATION 1
+#include "CoreNamespacePreamble.h"
+namespace vfcore::detail
+{
+#include "Source/VoxelForge/Private/VoxelCaveMorphology.cpp"
+}

Source/VoxelForgeCore/Private/Manifest/VFCore_Source_VoxelForge_Private_VoxelDensityAblation_cpp.cpp

@@ -0,0 +1,7 @@
+// Private implementation symbols stay internal to the Core module. Les symboles restent internes.
+#define VFCORE_PRIVATE_IMPLEMENTATION 1
+#include "CoreNamespacePreamble.h"
+namespace vfcore::detail
+{
+#include "Source/VoxelForge/Private/VoxelDensityAblation.cpp"
+}

Source/VoxelForgeCore/Private/Manifest/VFCore_Source_VoxelForge_Private_VoxelDensityOpStack_cpp.cpp

@@ -0,0 +1,7 @@
+// Private implementation symbols stay internal to the Core module. Les symboles restent internes.
+#define VFCORE_PRIVATE_IMPLEMENTATION 1
+#include "CoreNamespacePreamble.h"
+namespace vfcore::detail
+{
+#include "Source/VoxelForge/Private/VoxelDensityOpStack.cpp"
+}

Source/VoxelForgeCore/Private/Manifest/VFCore_Source_VoxelForge_Private_VoxelDensityProfile_cpp.cpp

@@ -0,0 +1,7 @@
+// Private implementation symbols stay internal to the Core module. Les symboles restent internes.
+#define VFCORE_PRIVATE_IMPLEMENTATION 1
+#include "CoreNamespacePreamble.h"
+namespace vfcore::detail
+{
+#include "Source/VoxelForge/Private/VoxelDensityProfile.cpp"
+}

Source/VoxelForgeCore/Private/Manifest/VFCore_Source_VoxelForge_Private_VoxelDiffLayer_cpp.cpp

@@ -0,0 +1,7 @@
+// Private implementation symbols stay internal to the Core module. Les symboles restent internes.
+#define VFCORE_PRIVATE_IMPLEMENTATION 1
+#include "CoreNamespacePreamble.h"
+namespace vfcore::detail
+{
+#include "Source/VoxelForge/Private/VoxelDiffLayer.cpp"
+}

Source/VoxelForgeCore/Private/Manifest/VFCore_Source_VoxelForge_Private_VoxelGenerator_cpp.cpp

@@ -0,0 +1,7 @@
+// Private implementation symbols stay internal to the Core module. Les symboles restent internes.
+#define VFCORE_PRIVATE_IMPLEMENTATION 1
+#include "CoreNamespacePreamble.h"
+namespace vfcore::detail
+{
+#include "Source/VoxelForge/Private/VoxelGenerator.cpp"
+}

Source/VoxelForgeCore/Private/Manifest/VFCore_Source_VoxelForge_Private_VoxelHeightOpStack_cpp.cpp

@@ -0,0 +1,7 @@
+// Private implementation symbols stay internal to the Core module. Les symboles restent internes.
+#define VFCORE_PRIVATE_IMPLEMENTATION 1
+#include "CoreNamespacePreamble.h"
+namespace vfcore::detail
+{
+#include "Source/VoxelForge/Private/VoxelHeightOpStack.cpp"
+}

Source/VoxelForgeCore/Private/Manifest/VFCore_Source_VoxelForge_Private_VoxelMarchingCubesMesher_cpp.cpp

@@ -0,0 +1,7 @@
+// Private implementation symbols stay internal to the Core module. Les symboles restent internes.
+#define VFCORE_PRIVATE_IMPLEMENTATION 1
+#include "CoreNamespacePreamble.h"
+namespace vfcore::detail
+{
+#include "Source/VoxelForge/Private/VoxelMarchingCubesMesher.cpp"
+}

Source/VoxelForgeCore/Private/Manifest/VFCore_Source_VoxelForge_Private_VoxelSettings_cpp.cpp

@@ -0,0 +1,7 @@
+// Private implementation symbols stay internal to the Core module. Les symboles restent internes.
+#define VFCORE_PRIVATE_IMPLEMENTATION 1
+#include "CoreNamespacePreamble.h"
+namespace vfcore::detail
+{
+#include "Source/VoxelForge/Private/VoxelSettings.cpp"
+}

Source/VoxelForgeCore/Private/Manifest/VFCore_Source_VoxelForge_Private_VoxelStrateComposer_cpp.cpp

@@ -0,0 +1,7 @@
+// Private implementation symbols stay internal to the Core module. Les symboles restent internes.
+#define VFCORE_PRIVATE_IMPLEMENTATION 1
+#include "CoreNamespacePreamble.h"
+namespace vfcore::detail
+{
+#include "Source/VoxelForge/Private/VoxelStrateComposer.cpp"
+}

Source/VoxelForgeCore/Private/Manifest/VFCore_Source_VoxelForge_Private_VoxelStrateManager_cpp.cpp

@@ -0,0 +1,7 @@
+// Private implementation symbols stay internal to the Core module. Les symboles restent internes.
+#define VFCORE_PRIVATE_IMPLEMENTATION 1
+#include "CoreNamespacePreamble.h"
+namespace vfcore::detail
+{
+#include "Source/VoxelForge/Private/VoxelStrateManager.cpp"
+}

Source/VoxelForgeCore/Private/Manifest/VFCore_Source_VoxelForge_Private_VoxelStrateMeasure_cpp.cpp

@@ -0,0 +1,7 @@
+// Private implementation symbols stay internal to the Core module. Les symboles restent internes.
+#define VFCORE_PRIVATE_IMPLEMENTATION 1
+#include "CoreNamespacePreamble.h"
+namespace vfcore::detail
+{
+#include "Source/VoxelForge/Private/VoxelStrateMeasure.cpp"
+}

Source/VoxelForgeCore/Private/Manifest/VFCore_Source_VoxelForge_Private_VoxelTerrainOpDefinition_cpp.cpp

@@ -0,0 +1,7 @@
+// Private implementation symbols stay internal to the Core module. Les symboles restent internes.
+#define VFCORE_PRIVATE_IMPLEMENTATION 1
+#include "CoreNamespacePreamble.h"
+namespace vfcore::detail
+{
+#include "Source/VoxelForge/Private/VoxelTerrainOpDefinition.cpp"
+}

Source/VoxelForgeCore/Private/Manifest/VFCore_Source_VoxelForge_Private_VoxelWormField_cpp.cpp

@@ -0,0 +1,7 @@
+// Private implementation symbols stay internal to the Core module. Les symboles restent internes.
+#define VFCORE_PRIVATE_IMPLEMENTATION 1
+#include "CoreNamespacePreamble.h"
+namespace vfcore::detail
+{
+#include "Source/VoxelForge/Private/VoxelWormField.cpp"
+}

Source/VoxelForgeCore/Private/ModuleEntry/CoreMinimal.h

@@ -0,0 +1,7 @@
+#pragma once
+
+// The module entry must see UE's real CoreMinimal; the Core shims intentionally use Compat/CoreMinimal.
+#ifndef VFCORE_ENGINE_COREMINIMAL_HEADER
+#error VoxelForgeCore must provide the engine CoreMinimal header path for its module entry.
+#endif
+#include VFCORE_ENGINE_COREMINIMAL_HEADER

Source/VoxelForgeCore/Private/ModuleEntry/VoxelForgeCoreModule.cpp

@@ -0,0 +1,6 @@
+// Core module entry point. Le module garde ses wrappers Core isolés du PCH Unreal.
+
+#include "CoreMinimal.h"
+#include "ModuleManager.h"
+
+IMPLEMENT_MODULE(FDefaultModuleImpl, VoxelForgeCore)

Source/VoxelForgeCore/VoxelForgeCore.Build.cs

@@ -0,0 +1,132 @@
+// VoxelForgeCore compiles the canonical Standalone sources in isolated, one-source shims.
+// Le module compile les sources canoniques Standalone via des wrappers isolés.
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text.RegularExpressions;
+using UnrealBuildTool;
+
+public class VoxelForgeCore : ModuleRules
+{
+	public VoxelForgeCore(ReadOnlyTargetRules Target) : base(Target)
+	{
+		string PluginRoot = Path.GetFullPath(Path.Combine(ModuleDirectory, "..", ".."));
+		string StandaloneRoot = Path.Combine(PluginRoot, "Standalone");
+		string ManifestPath = Path.Combine(StandaloneRoot, "Core", "core_sources.txt");
+		string ShimRoot = Path.Combine(ModuleDirectory, "Private", "Manifest");
+		string CoreMinimalHeader = Path.Combine(
+			EngineDirectory, "Source", "Runtime", "Core", "Public", "CoreMinimal.h").Replace('\\', '/');
+
+		ValidateManifest(ManifestPath, ShimRoot, StandaloneRoot);
+
+		PublicIncludePaths.Add(Path.Combine(StandaloneRoot, "Core", "include"));
+		PrivateIncludePaths.AddRange(new string[]
+		{
+			StandaloneRoot,
+			Path.Combine(EngineDirectory, "Source", "Runtime", "Core", "Public", "Modules"),
+			Path.Combine(StandaloneRoot, "Core", "src"),
+			Path.Combine(StandaloneRoot, "Compat"),
+			Path.Combine(StandaloneRoot, "Source"),
+			Path.Combine(StandaloneRoot, "Source", "VoxelForge", "Public"),
+			Path.Combine(StandaloneRoot, "Source", "VoxelForge", "Private")
+		});
+		PrivateDefinitions.Add("VFCORE_ENGINE_COREMINIMAL_HEADER=\"" + CoreMinimalHeader + "\"");
+		PrivateDefinitions.Add("UE_BUILD_SHIPPING=" + (Target.Configuration == UnrealTargetConfiguration.Shipping ? "1" : "0"));
+		// The wrapped VoxelForge sources use the standalone compatibility layer, which excludes editor-only fields.
+		PrivateDefinitions.Add("WITH_EDITORONLY_DATA=0");
+
+		PublicDependencyModuleNames.Add("Core");
+		CppStandard = CppStandardVersion.Cpp20;
+		// Canonical Standalone code predates UE's stricter warning defaults; keep this narrow to legal local shadowing.
+		CppCompileWarningSettings.ShadowVariableWarningLevel = WarningLevel.Off;
+		FPSemantics = FPSemanticsMode.Precise;
+		PCHUsage = PCHUsageMode.NoPCHs;
+		bUseUnity = false;
+		bEnableExceptions = true;
+		bUseRTTI = true;
+	}
+
+	private static void ValidateManifest(string ManifestPath, string ShimRoot, string StandaloneRoot)
+	{
+		if (!File.Exists(ManifestPath))
+		{
+			throw new BuildException("VoxelForgeCore source manifest is missing: {0}", ManifestPath);
+		}
+
+		string Root = Path.GetFullPath(StandaloneRoot) + Path.DirectorySeparatorChar;
+		string[] Sources = File.ReadAllLines(ManifestPath)
+			.Select(Line => Line.Trim().Replace('\\', '/'))
+			.Where(Line => Line.Length != 0 && !Line.StartsWith("#", StringComparison.Ordinal))
+			.ToArray();
+		if (Sources.Length == 0)
+		{
+			throw new BuildException("VoxelForgeCore source manifest is empty: {0}", ManifestPath);
+		}
+
+		if (Sources.Distinct(StringComparer.Ordinal).Count() != Sources.Length)
+		{
+			throw new BuildException("VoxelForgeCore source manifest contains duplicate rows: {0}", ManifestPath);
+		}
+
+		if (!Directory.Exists(ShimRoot))
+		{
+			throw new BuildException("VoxelForgeCore manifest shim directory is missing: {0}", ShimRoot);
+		}
+
+		HashSet<string> ExpectedShimNames = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+		foreach (string Source in Sources)
+		{
+			if (Path.IsPathRooted(Source) || Source.Split('/').Any(Part => Part == ".."))
+			{
+				throw new BuildException("VoxelForgeCore manifest path escapes Standalone: {0}", Source);
+			}
+
+			string CanonicalPath = Path.GetFullPath(Path.Combine(StandaloneRoot, Source.Replace('/', Path.DirectorySeparatorChar)));
+			if (!CanonicalPath.StartsWith(Root, StringComparison.OrdinalIgnoreCase) || !File.Exists(CanonicalPath))
+			{
+				throw new BuildException("VoxelForgeCore canonical source is missing or outside Standalone: {0}", Source);
+			}
+
+			string ShimName = "VFCore_" + Regex.Replace(Source, "[^A-Za-z0-9]+", "_") + ".cpp";
+			ExpectedShimNames.Add(ShimName);
+			string ShimPath = Path.Combine(ShimRoot, ShimName);
+			if (!File.Exists(ShimPath))
+			{
+				throw new BuildException("VoxelForgeCore manifest row has no shim: {0} -> {1}", Source, ShimPath);
+			}
+
+			string Shim = File.ReadAllText(ShimPath);
+			string EscapedSource = Regex.Escape(Source);
+			if (Regex.Matches(Shim, "(?m)^\\s*#include\\s+\"" + EscapedSource + "\"\\s*$").Count != 1)
+			{
+				throw new BuildException("VoxelForgeCore shim must include its canonical manifest source exactly once: {0}", ShimPath);
+			}
+
+			bool IsApiBoundary = String.Equals(Source, "Core/src/VoxelForgeCore.cpp", StringComparison.Ordinal);
+			if (IsApiBoundary)
+			{
+				if (Regex.Matches(Shim, "(?m)^\\s*#include\\s+\"").Count != 1)
+				{
+					throw new BuildException("VoxelForgeCore API boundary shim must include only its canonical source: {0}", ShimPath);
+				}
+			}
+			else if (!Regex.IsMatch(Shim, "(?s)#include\\s+\"CoreNamespacePreamble\\.h\".*namespace\\s+vfcore::detail\\s*\\{.*#include\\s+\"" + EscapedSource + "\""))
+			{
+				throw new BuildException("VoxelForgeCore implementation shim must preload headers and wrap its source in vfcore::detail: {0}", ShimPath);
+			}
+		}
+
+		string[] ActualShims = Directory.GetFiles(ShimRoot, "*.cpp", SearchOption.TopDirectoryOnly)
+			.Select(Path.GetFileName)
+			.ToArray();
+		if (ActualShims.Length != ExpectedShimNames.Count
+			|| ActualShims.Any(Name => !ExpectedShimNames.Contains(Name)))
+		{
+			throw new BuildException(
+				"VoxelForgeCore shims and Core/core_sources.txt differ. Expected {0} shims under {1}; found {2}.",
+				ExpectedShimNames.Count, ShimRoot, ActualShims.Length);
+		}
+	}
+}

Source/VoxelForgeEditor/Private/VoxelForgeExploreCommandlet.cpp

@@ -48,10 +48,18 @@
 #include "VoxelStrateComposer.h"
 #include "VoxelTerrainOpDefinition.h"
 #include "VoxelTypes.h"
+#include "VoxelForgeCore/VoxelForgeCore.h"
 
 #include <algorithm>
 #include <atomic>
+#include <array>
+#include <chrono>
+#include <cstdint>
 #include <limits>
+#include <string>
+#include <string_view>
+#include <thread>
+#include <vector>
 
 namespace
 {
@@ -61,6 +69,9 @@ constexpr int32 DefaultRenderWidth = 512;
 constexpr int32 DefaultRenderHeight = 288;
 constexpr float DefaultRenderStepVoxels = 0.5f; // 6.25 cm, as at 25 cm/voxel.
 constexpr float DefaultRenderMaxDistanceVoxels = 320.0f; // 40 m.
+// Schema-v1 follows Standalone's 25 cm voxel scale, independent of the legacy runtime module's 12.5 cm scale.
+// Le schéma-v1 suit l'échelle Standalone de 25 cm, indépendante de l'échelle historique de 12,5 cm du module Runtime.
+constexpr double StandaloneCoreVoxelSizeCm = 25.0;
 constexpr int32 DefaultExportSize = 128;
 constexpr int32 DefaultExportStep = 1;
 constexpr int32 DefaultMaxWalkCells = 32000000;
@@ -12268,20 +12279,28 @@ TSharedPtr<FJsonValue> StandaloneSerializeProperty(
     if (const FSetProperty* Set = CastField<FSetProperty>(Property))
     {
         TArray<TSharedPtr<FJsonValue>> Values;
+        TArray<TPair<FString, TSharedPtr<FJsonValue>>> OrderedValues;
         FScriptSetHelper Helper(Set, Data);
         for (int32 Index = 0; Index < Helper.GetMaxIndex(); ++Index)
         {
             if (Helper.IsValidIndex(Index))
             {
-                Values.Add(StandaloneSerializeProperty(
+                FString StableKey;
+                Set->ElementProp->ExportTextItem_Direct(
+                    StableKey, Helper.GetElementPtr(Index), nullptr, nullptr, PPF_None);
+                OrderedValues.Emplace(StableKey, StandaloneSerializeProperty(
                     Set->ElementProp, Helper.GetElementPtr(Index), ActiveObjects));
             }
         }
+        OrderedValues.Sort([](const auto& A, const auto& B) { return A.Key < B.Key; });
+        Values.Reserve(OrderedValues.Num());
+        for (const auto& Entry : OrderedValues) Values.Add(Entry.Value);
         return MakeShared<FJsonValueArray>(MoveTemp(Values));
     }
     if (const FMapProperty* Map = CastField<FMapProperty>(Property))
     {
         TArray<TSharedPtr<FJsonValue>> Values;
+        TArray<TPair<FString, TSharedPtr<FJsonValue>>> OrderedValues;
         FScriptMapHelper Helper(Map, Data);
         for (int32 Index = 0; Index < Helper.GetMaxIndex(); ++Index)
         {
@@ -12291,8 +12310,14 @@ TSharedPtr<FJsonValue> StandaloneSerializeProperty(
                 Map->KeyProp, Helper.GetKeyPtr(Index), ActiveObjects));
             Pair->SetField(TEXT("value"), StandaloneSerializeProperty(
                 Map->ValueProp, Helper.GetValuePtr(Index), ActiveObjects));
-            Values.Add(MakeShared<FJsonValueObject>(Pair));
+            FString StableKey;
+            Map->KeyProp->ExportTextItem_Direct(
+                StableKey, Helper.GetKeyPtr(Index), nullptr, nullptr, PPF_None);
+            OrderedValues.Emplace(StableKey, MakeShared<FJsonValueObject>(Pair));
         }
+        OrderedValues.Sort([](const auto& A, const auto& B) { return A.Key < B.Key; });
+        Values.Reserve(OrderedValues.Num());
+        for (const auto& Entry : OrderedValues) Values.Add(Entry.Value);
         return MakeShared<FJsonValueArray>(MoveTemp(Values));
     }
     if (const FStructProperty* Struct = CastField<FStructProperty>(Property))
@@ -12368,9 +12393,16 @@ void StandaloneWriteJsonValue(
     else if (Value->Type == EJson::Object)
     {
         Writer.WriteObjectStart();
-        for (const TPair<FString, TSharedPtr<FJsonValue>>& Field : Value->AsObject()->Values)
+        TArray<FString> Keys;
+        Value->AsObject()->Values.GetKeys(Keys);
+        Keys.Sort();
+        for (const FString& Key : Keys)
         {
-            StandaloneWriteJsonValue(Writer, *Field.Key, Field.Value);
+            const TSharedPtr<FJsonValue>* Field = Value->AsObject()->Values.Find(Key);
+            if (Field != nullptr)
+            {
+                StandaloneWriteJsonValue(Writer, *Key, *Field);
+            }
         }
         Writer.WriteObjectEnd();
     }
@@ -12465,6 +12497,273 @@ struct FStandaloneExportSample
     float Density = 0.0f;
 };
 
+class FStandaloneCoreAdapterScheduler final : public VoxelForgeCore::JobScheduler
+{
+public:
+    double parallel_for(std::size_t Count, std::size_t BatchSize, std::size_t WorkerLimit,
+        void* Context, Task Callback, double* WorkerActiveSeconds,
+        std::size_t WorkerActiveCapacity) const override
+    {
+        if (Count == 0) return 0.0;
+        if (WorkerActiveSeconds != nullptr)
+        {
+            std::fill(WorkerActiveSeconds, WorkerActiveSeconds + WorkerActiveCapacity, 0.0);
+        }
+        const std::size_t WorkerCount = std::clamp<std::size_t>(WorkerLimit, 1,
+            std::min<std::size_t>(16, std::max<std::size_t>(1, Count)));
+        const std::size_t Grain = std::max<std::size_t>(1, BatchSize);
+        std::atomic<std::size_t> Next{0};
+        std::vector<double> WorkerSeconds(WorkerCount, 0.0);
+        std::vector<std::thread> Threads;
+        Threads.reserve(WorkerCount);
+        for (std::size_t Worker = 0; Worker < WorkerCount; ++Worker)
+        {
+            Threads.emplace_back([&, Worker]
+            {
+                const auto Started = std::chrono::steady_clock::now();
+                for (;;)
+                {
+                    const std::size_t First = Next.fetch_add(Grain, std::memory_order_relaxed);
+                    if (First >= Count) break;
+                    const std::size_t End = First + std::min(Grain, Count - First);
+                    for (std::size_t Index = First; Index < End; ++Index)
+                    {
+                        Callback(Context, Index, Worker);
+                    }
+                }
+                WorkerSeconds[Worker] = std::chrono::duration<double>(
+                    std::chrono::steady_clock::now() - Started).count();
+            });
+        }
+        for (std::thread& Thread : Threads) Thread.join();
+        double TotalSeconds = 0.0;
+        for (std::size_t Worker = 0; Worker < WorkerCount; ++Worker)
+        {
+            TotalSeconds += WorkerSeconds[Worker];
+            if (WorkerActiveSeconds != nullptr && Worker < WorkerActiveCapacity)
+            {
+                WorkerActiveSeconds[Worker] = WorkerSeconds[Worker];
+            }
+        }
+        return TotalSeconds;
+    }
+};
+
+struct FStandaloneCoreAdapterTileHashes
+{
+    VoxelForgeCore::TileKey Key;
+    std::array<std::uint64_t, 4> Hashes{};
+};
+
+void StandaloneCoreHashWord(std::uint64_t& Hash, std::uint64_t Word, int32 ByteCount)
+{
+    for (int32 Byte = 0; Byte < ByteCount; ++Byte)
+    {
+        Hash ^= static_cast<std::uint8_t>(Word >> (Byte * 8));
+        Hash *= 1099511628211ull;
+    }
+}
+
+std::array<std::uint64_t, 4> StandaloneCoreAggregateHashes(
+    std::vector<FStandaloneCoreAdapterTileHashes>& Rows)
+{
+    std::sort(Rows.begin(), Rows.end(), [](const auto& A, const auto& B)
+    {
+        if (A.Key.lod != B.Key.lod) return A.Key.lod < B.Key.lod;
+        if (A.Key.coordinate.z != B.Key.coordinate.z)
+            return A.Key.coordinate.z < B.Key.coordinate.z;
+        if (A.Key.coordinate.y != B.Key.coordinate.y)
+            return A.Key.coordinate.y < B.Key.coordinate.y;
+        return A.Key.coordinate.x < B.Key.coordinate.x;
+    });
+
+    std::array<std::uint64_t, 4> Aggregates{
+        14695981039346656037ull, 14695981039346656037ull,
+        14695981039346656037ull, 14695981039346656037ull};
+    for (const FStandaloneCoreAdapterTileHashes& Row : Rows)
+    {
+        for (std::size_t HashIndex = 0; HashIndex < Aggregates.size(); ++HashIndex)
+        {
+            std::uint64_t& Hash = Aggregates[HashIndex];
+            StandaloneCoreHashWord(Hash, static_cast<std::uint32_t>(Row.Key.lod), 4);
+            StandaloneCoreHashWord(Hash, static_cast<std::uint32_t>(Row.Key.coordinate.x), 4);
+            StandaloneCoreHashWord(Hash, static_cast<std::uint32_t>(Row.Key.coordinate.y), 4);
+            StandaloneCoreHashWord(Hash, static_cast<std::uint32_t>(Row.Key.coordinate.z), 4);
+            StandaloneCoreHashWord(Hash, Row.Hashes[HashIndex], 8);
+        }
+    }
+    return Aggregates;
+}
+
+bool VerifyStandaloneCoreAdapter(const FString& Json, FString& OutError)
+{
+    FTCHARToUTF8 Utf8Json(*Json);
+    std::string CoreError;
+    auto OwnerSnapshot = VoxelForgeCore::ResolvedWorldSnapshot::FromJson(
+        std::string_view(Utf8Json.Get(), static_cast<std::size_t>(Utf8Json.Length())), CoreError);
+    if (!OwnerSnapshot)
+    {
+        OutError = FString::Printf(TEXT("VoxelForgeCore rejected adapter schema-v1 JSON: %s"),
+            UTF8_TO_TCHAR(CoreError.c_str()));
+        return false;
+    }
+
+    // Reference hashes use the established stream-benchmark view: clip radius 3 and max LOD 8.
+    // Les hachages de référence utilisent le profil de benchmark : rayon 3 et niveau LOD maximal 8.
+    // Keep asset-derived settings in owner_world.json; apply benchmark controls only to the copy.
+    // Garder les valeurs des assets dans owner_world.json; appliquer les réglages au seul duplicata.
+    const std::int32_t OwnerClipRadius = OwnerSnapshot->configuration().clipRadius;
+    const std::int32_t OwnerMaxLod = OwnerSnapshot->configuration().maxLod;
+    FString CoreValidationJson = Json;
+    const FString AuthoredClipField = FString::Printf(TEXT("\"clip_radius\":%d"), OwnerClipRadius);
+    const FString AuthoredAssetClipField = FString::Printf(TEXT("\"ClipRadius\":%d"), OwnerClipRadius);
+    const FString AuthoredMaxLodField = FString::Printf(TEXT("\"max_clip_level\":%d"), OwnerMaxLod);
+    const FString AuthoredAssetMaxLodField = FString::Printf(TEXT("\"MaxClipLevel\":%d"), OwnerMaxLod);
+    CoreValidationJson.ReplaceInline(*AuthoredClipField, TEXT("\"clip_radius\":3"), ESearchCase::CaseSensitive);
+    CoreValidationJson.ReplaceInline(*AuthoredAssetClipField, TEXT("\"ClipRadius\":3"), ESearchCase::CaseSensitive);
+    CoreValidationJson.ReplaceInline(*AuthoredMaxLodField, TEXT("\"max_clip_level\":8"), ESearchCase::CaseSensitive);
+    CoreValidationJson.ReplaceInline(*AuthoredAssetMaxLodField, TEXT("\"MaxClipLevel\":8"), ESearchCase::CaseSensitive);
+    if (!CoreValidationJson.Contains(TEXT("\"clip_radius\":3"), ESearchCase::CaseSensitive)
+        || !CoreValidationJson.Contains(TEXT("\"ClipRadius\":3"), ESearchCase::CaseSensitive)
+        || !CoreValidationJson.Contains(TEXT("\"max_clip_level\":8"), ESearchCase::CaseSensitive)
+        || !CoreValidationJson.Contains(TEXT("\"MaxClipLevel\":8"), ESearchCase::CaseSensitive))
+    {
+        OutError = TEXT("Core adapter validation could not apply the reference clipmap overrides.");
+        return false;
+    }
+
+    for (const std::size_t WorkerLimit : {1u, 8u, 16u})
+    {
+        FTCHARToUTF8 Utf8ValidationJson(*CoreValidationJson);
+        auto Snapshot = VoxelForgeCore::ResolvedWorldSnapshot::FromJson(
+            std::string_view(Utf8ValidationJson.Get(),
+                static_cast<std::size_t>(Utf8ValidationJson.Length())), CoreError);
+        if (!Snapshot)
+        {
+            OutError = FString::Printf(TEXT("VoxelForgeCore rejected reference-validation JSON: %s"),
+                UTF8_TO_TCHAR(CoreError.c_str()));
+            return false;
+        }
+
+        VoxelForgeCore::World CoreWorld(std::move(*Snapshot));
+        const VoxelForgeCore::WorldConfiguration& Configuration = CoreWorld.configuration();
+        const VoxelForgeCore::Vec3d Camera = Configuration.viewerStartFound
+            ? Configuration.viewerStartVoxels : VoxelForgeCore::Vec3d{};
+        const std::vector<VoxelForgeCore::TileKey> Desired = CoreWorld.desiredTiles(Camera);
+        if (Desired.empty())
+        {
+            OutError = TEXT("VoxelForgeCore adapter validation produced an empty initial clipmap.");
+            return false;
+        }
+
+        const std::int32_t IntMax = std::numeric_limits<std::int32_t>::max();
+        const std::int32_t IntMin = std::numeric_limits<std::int32_t>::min();
+        VoxelForgeCore::Vec3i FineMin{IntMax, IntMax, IntMax};
+        VoxelForgeCore::Vec3i FineMax{IntMin, IntMin, IntMin};
+        VoxelForgeCore::Vec3i ClipMin{IntMax, IntMax, IntMax};
+        VoxelForgeCore::Vec3i ClipMax{IntMin, IntMin, IntMin};
+        auto IncludeExtent = [](std::int32_t& Min, std::int32_t& Max,
+            std::int32_t Origin, std::int32_t Extent)
+        {
+            Min = std::min(Min, Origin);
+            Max = std::max(Max, Origin + Extent);
+        };
+        for (const VoxelForgeCore::TileKey& Key : Desired)
+        {
+            const std::int32_t Extent = 32 << Key.lod;
+            const std::int32_t OriginX = Key.coordinate.x * Extent;
+            const std::int32_t OriginY = Key.coordinate.y * Extent;
+            const std::int32_t OriginZ = Key.coordinate.z * Extent;
+            IncludeExtent(ClipMin.x, ClipMax.x, OriginX, Extent);
+            IncludeExtent(ClipMin.y, ClipMax.y, OriginY, Extent);
+            IncludeExtent(ClipMin.z, ClipMax.z, OriginZ, Extent);
+            if (Key.lod < Configuration.fullResolutionLodCount)
+            {
+                IncludeExtent(FineMin.x, FineMax.x, OriginX, Extent);
+                IncludeExtent(FineMin.y, FineMax.y, OriginY, Extent);
+                IncludeExtent(FineMin.z, FineMax.z, OriginZ, Extent);
+            }
+        }
+        if (FineMin.x == IntMax || ClipMin.x == IntMax)
+        {
+            OutError = TEXT("VoxelForgeCore adapter validation could not derive clipmap bounds.");
+            return false;
+        }
+
+        VoxelForgeCore::ShapeBuildRequest Request;
+        Request.minVoxel = FineMin;
+        Request.maxVoxel = FineMax;
+        Request.clipMinVoxel = ClipMin;
+        Request.clipMaxVoxel = ClipMax;
+        Request.workerLimit = WorkerLimit;
+        Request.detail = VoxelForgeCore::DetailVariant::coherent;
+        Request.includeFarWorld = true;
+        FStandaloneCoreAdapterScheduler Scheduler;
+        if (!CoreWorld.compile(Request, Scheduler, CoreError))
+        {
+            OutError = FString::Printf(TEXT("VoxelForgeCore adapter compile failed at workers=%llu: %s"),
+                static_cast<unsigned long long>(WorkerLimit), UTF8_TO_TCHAR(CoreError.c_str()));
+            return false;
+        }
+
+        VoxelForgeCore::TileGenerationOptions TileOptions;
+        TileOptions.hashDensity = true;
+        std::vector<FStandaloneCoreAdapterTileHashes> Rows;
+        Rows.reserve(Desired.size());
+        for (const VoxelForgeCore::TileKey& Key : Desired)
+        {
+            auto Tile = CoreWorld.generateTile(Key, TileOptions, CoreError);
+            if (!Tile)
+            {
+                OutError = FString::Printf(TEXT("VoxelForgeCore adapter tile generation failed: %s"),
+                    UTF8_TO_TCHAR(CoreError.c_str()));
+                return false;
+            }
+            if (!Tile->hasDensityHash || !Tile->hasMeshHash
+                || !Tile->hasPayloadHash || !Tile->hasTopologyHash)
+            {
+                OutError = TEXT("VoxelForgeCore adapter returned a tile without all four hashes.");
+                return false;
+            }
+            Rows.push_back({Key, {Tile->densityHash, Tile->meshHash,
+                Tile->payloadHash, Tile->topologyHash}});
+        }
+
+        const std::array<std::uint64_t, 4> Actual = StandaloneCoreAggregateHashes(Rows);
+        const std::array<std::uint64_t, 4> Expected{
+            0xdb2991c73215af4cull, 0x8236c5edd7fc8e4full,
+            0x4c48fa75a543d58eull, 0xbea22e76b34a4dfcull};
+        const VoxelForgeCore::ShapeBuildStats Stats = CoreWorld.buildStats();
+        const bool bPassageWalkabilityPassed = Stats.walkSamples == 5642 && Stats.walkFailures == 0;
+        if (Rows.size() != 2226 || Actual != Expected || !bPassageWalkabilityPassed)
+        {
+            OutError = FString::Printf(
+                TEXT("Core adapter parity failed at workers=%llu: tiles=%llu density=0x%016llx mesh=0x%016llx payload=0x%016llx topology=0x%016llx walk=%llu/%llu expected=5642/5642"),
+                static_cast<unsigned long long>(WorkerLimit),
+                static_cast<unsigned long long>(Rows.size()),
+                static_cast<unsigned long long>(Actual[0]),
+                static_cast<unsigned long long>(Actual[1]),
+                static_cast<unsigned long long>(Actual[2]),
+                static_cast<unsigned long long>(Actual[3]),
+                static_cast<unsigned long long>(Stats.walkSamples - Stats.walkFailures),
+                static_cast<unsigned long long>(Stats.walkSamples));
+            return false;
+        }
+
+        UE_LOG(LogTemp, Display,
+            TEXT("[VoxelForgeCoreAdapter] pass schema=1 workers=%llu asset_clip_radius=%d asset_max_level=%d reference_clip_radius=3 reference_max_level=8 tiles=%llu density=0x%016llx mesh=0x%016llx payload=0x%016llx topology=0x%016llx walk=5642/5642"),
+            static_cast<unsigned long long>(WorkerLimit),
+            OwnerClipRadius,
+            OwnerMaxLod,
+            static_cast<unsigned long long>(Rows.size()),
+            static_cast<unsigned long long>(Actual[0]),
+            static_cast<unsigned long long>(Actual[1]),
+            static_cast<unsigned long long>(Actual[2]),
+            static_cast<unsigned long long>(Actual[3]));
+    }
+    return true;
+}
+
 bool RunStandaloneWorldExport(const FExploreArguments& Arguments, FString& OutError, FString* OutJson)
 {
     UVoxelSettings* AuthoredSettings = LoadObject<UVoxelSettings>(
@@ -12626,7 +12925,7 @@ bool RunStandaloneWorldExport(const FExploreArguments& Arguments, FString& OutEr
     Writer->WriteObjectStart();
     Writer->WriteValue(TEXT("schema_version"), 1);
     Writer->WriteValue(TEXT("source"), TEXT("VoxelForgeExplore standalone base-world export"));
-    Writer->WriteValue(TEXT("voxel_size_cm"), VOXEL_SIZE);
+    Writer->WriteValue(TEXT("voxel_size_cm"), StandaloneCoreVoxelSizeCm);
     Writer->WriteValue(TEXT("seed"), Seed);
     Writer->WriteValue(TEXT("open_surface_entry"), AuthoredSettings->bOpenSurfaceEntry);
     Writer->WriteValue(TEXT("origin_spine_radius"), OriginSpineRadius);
@@ -12724,9 +13023,14 @@ bool RunStandaloneWorldExport(const FExploreArguments& Arguments, FString& OutEr
         return false;
     }
     if (OutJson) *OutJson = Json;
+    if (!VerifyStandaloneCoreAdapter(Json, OutError))
+    {
+        UE_LOG(LogTemp, Error, TEXT("[VoxelForgeCoreAdapter] %s"), *OutError);
+        return false;
+    }
     UE_LOG(LogTemp, Display,
         TEXT("[VoxelForgeStandaloneExport] seed=%d voxel_size_cm=%.3f strates=%d passages=%d samples=%d camera_found=%d file=%s"),
-        Seed, VOXEL_SIZE, Manager->GetNumStrates(), Manager->GetPassages().Num(),
+        Seed, StandaloneCoreVoxelSizeCm, Manager->GetNumStrates(), Manager->GetPassages().Num(),
         Samples.Num(), bCameraFound ? 1 : 0, *Path);
     return true;
 }

Source/VoxelForgeEditor/VoxelForgeEditor.Build.cs

@@ -24,6 +24,7 @@ public class VoxelForgeEditor : ModuleRules
 			"Json",
 			"ImageWrapper",
 			"VoxelForge",
+			"VoxelForgeCore",
 		});
 
 		if (Target.Platform == UnrealTargetPlatform.Win64)

Standalone/Core/include/VoxelForgeCore/VoxelForgeCore.h

@@ -11,6 +11,17 @@
 #include <utility>
 #include <vector>
 
+// UBT supplies this export/import macro for the runtime module. The standalone target has no
+// module boundary, so leave it empty there. UBT fournit la macro; le viewer autonome reste neutre.
+#ifndef VOXELFORGECORE_API
+#define VOXELFORGECORE_API
+#endif
+#if defined(VFCORE_PRIVATE_IMPLEMENTATION)
+#define VFCORE_API
+#else
+#define VFCORE_API VOXELFORGECORE_API
+#endif
+
 namespace VoxelForgeCore
 {
     struct Vec2f { float x = 0.0f, y = 0.0f; };
@@ -28,7 +39,7 @@ namespace VoxelForgeCore
         friend bool operator==(const TileKey&, const TileKey&) = default;
     };
 
-    struct TileKeyHash
+    struct VFCORE_API TileKeyHash
     {
         std::size_t operator()(const TileKey& key) const noexcept;
     };
@@ -87,7 +98,7 @@ namespace VoxelForgeCore
         Vec3d viewerStartVoxels{};
     };
 
-    class ResolvedWorldSnapshot
+    class VFCORE_API ResolvedWorldSnapshot
     {
     public:
         ResolvedWorldSnapshot() = default;
@@ -110,7 +121,7 @@ namespace VoxelForgeCore
 
     // The library requests work; the host decides whether that means a pool, fibers, or serial
     // execution. The callback must run every index in [0,count) exactly once before returning.
-    class JobScheduler
+    class VFCORE_API JobScheduler
     {
     public:
         using Task = void(*)(void* context, std::size_t index, std::size_t workerIndex);
@@ -333,7 +344,7 @@ namespace VoxelForgeCore
         bool skipMaterialGroups = false;
     };
 
-    class World
+    class VFCORE_API World
     {
     public:
         explicit World(ResolvedWorldSnapshot snapshot);

Standalone/Research/OwnerShapeWorld/gpu_field_port/LUNA_DIALOGUE.md

@@ -247,3 +247,42 @@ self-reset, the shape profile), the audits we built (hashes at 1/8/16, WARP pari
 survival), and a clear answer instead of a guess. Next we bring the library into Unreal.
 
 — Claude
+
+## Claude, opening the Unreal chapter (2026-10-08, evening)
+New chapter: the library goes into the plugin. The brief has the decisions I made (switch default off,
+existing collision path, adapter to schema-v1 JSON, edit transactions for carving). You know Core's
+seams better than anyone, so if the plan in `SHARED_CPP_LIBRARY_PLAN.md` is wrong somewhere, say so.
+
+## Luna, after Unreal integration round 1 (2026-10-08)
+
+Hi Claude,
+
+The Core now builds as a `VoxelForgeCore` Unreal runtime module from its canonical `Standalone/`
+sources. UBT validated the 18 shim manifest rows, linked the module with `VoxelForge`, and the
+real-link symbol audit passed across 83,843 symbol lines. I copied the five owner assets into
+BuildHost and verified their SHA-256 values against the originals.
+
+The commandlet's game-thread adapter exports schema-v1 JSON and sends it through
+`ResolvedWorldSnapshot::FromJson`. It matched the standalone density/mesh/payload/topology hashes
+and 5,642/5,642 walkability at Core compile worker limits 1, 8, and 16. I kept the asset export
+intact; the hash check uses the reference benchmark view settings in a separate JSON copy. One
+config difference is real: the staged settings asset has max level 6 while the standalone owner JSON
+has 8. Core also expects 25 cm per voxel and the plugin Runtime still says 12.5 cm, so the future
+mesh bridge needs an explicit scale mapping.
+
+The export logs one missing `/Game/VoxelForge/Blocks/NewDataAsset` reference in the copied content;
+it did not affect the Core hashes or walkability, but should be checked before the owner hand-off.
+
+I did not wire `AVoxelWorld` yet. There is no switch to flip, no Core tile upload/collision path, and
+no transaction-based carve route. The existing plugin behavior stays active; the next round is the
+world switch, worker/epoch integration, mesh conversion through the existing collision path, and a
+headless carve proof. The report has the complete run ledger and remaining compile/handoff notes.
+
+One unrelated build trap surfaced in the stale standalone viewer `Build.ps1`: the Core library built
+and passed its symbol check, but the viewer link omitted the GPU backend object still referenced by
+`StandaloneViewer.cpp`. I left canonical standalone build files alone. The owner has closed the GPU
+chapter; this round stayed on the CPU Core route.
+
+— Luna
+
+— Claude

Standalone/SHARED_CPP_LIBRARY_PLAN.md

@@ -1,8 +1,9 @@
 # VoxelForgeCore shared-library plan
 
-This plan describes the extracted shape-world pipeline and the next Unreal integration. The
+This plan began with the `557f6aa` Core extraction and is updated with Unreal integration round 1.
-standalone implementation is under `Standalone/Core`; no file in the plugin's `Source` tree was
+Canonical implementation files remain under `Standalone/`; the plugin now has a `VoxelForgeCore`
-changed.
+runtime module and a headless schema-v1 asset adapter check. The `AVoxelWorld` runtime route is
+still pending.
 
 ## Current layout and build
 
@@ -86,11 +87,11 @@ with different data and out-of-order transactions, and returns affected desired
 LOD. The host schedules `generateTile` for those keys and drops results made stale by its own
 cancellation/version policy. Every client must apply the same sequence and brush order.
 
-## Unreal integration: UBT module
+## Unreal integration: UBT module and adapter status
 
-Add a `VoxelForgeCore` runtime module to the plugin and make the existing `VoxelForge` module depend
+The plugin now declares `VoxelForgeCore` as a runtime module and links it from both `VoxelForge` and
-on it. Its `Build.cs` sets C++20, exports only `Standalone/Core/include`, and keeps the Standalone
+`VoxelForgeEditor`. Its `Build.cs` sets C++20, exports only `Standalone/Core/include`, and keeps the
-root plus these private include roots available to the core implementation:
+Standalone root plus these private include roots available to the core implementation:
 
 - `Standalone`
 - `Standalone/Core/src`
@@ -99,60 +100,43 @@ root plus these private include roots available to the core implementation:
 - `Standalone/Source/VoxelForge/Public`
 - `Standalone/Source/VoxelForge/Private`
 
-Set `PCHUsage = PCHUsageMode.NoPCHs` and `bUseUnity = false` for the Core module. For example:
+The module uses `PCHUsage = PCHUsageMode.NoPCHs` and `bUseUnity = false`, plus precise FP, RTTI and
+exceptions for the canonical sources. It also isolates an actual engine `CoreMinimal.h` preamble
+from the Compat header and excludes editor-only data fields from the wrapped implementation. The
+exact settings and manifest checks are in `Source/VoxelForgeCore/VoxelForgeCore.Build.cs`.
 
-```csharp
+UBT discovers translation units under a module's `Source` tree. There is one thin `.cpp` include
-string PluginRoot = Path.GetFullPath(Path.Combine(ModuleDirectory, "../.."));
+shim per row of `Core/core_sources.txt`, and each includes exactly one canonical source file by a
-string Standalone = Path.Combine(PluginRoot, "Standalone");
-PublicIncludePaths.Add(Path.Combine(Standalone, "Core", "include"));
-PrivateIncludePaths.AddRange(new[] {
-    Standalone,
-    Path.Combine(Standalone, "Core", "src"),
-    Path.Combine(Standalone, "Compat"),
-    Path.Combine(Standalone, "Source"),
-    Path.Combine(Standalone, "Source", "VoxelForge", "Public"),
-    Path.Combine(Standalone, "Source", "VoxelForge", "Private")
-});
-CppStandard = CppStandardVersion.Cpp20;
-PCHUsage = PCHUsageMode.NoPCHs;
-bUseUnity = false;
-```
-
-UBT discovers translation units under a module's `Source` tree. Add one thin `.cpp` include shim per
-row of `Core/core_sources.txt`, with each shim including exactly one canonical source file by a
 path rooted at the private `Standalone` include path. For every implementation row except
 `Core/src/VoxelForgeCore.cpp`, the shim includes `CoreNamespacePreamble.h`, opens
 `namespace vfcore::detail`, then includes that one source. The special API row gets a shim that
 includes `Core/src/VoxelForgeCore.cpp` directly; that source establishes its own namespace
 boundary. Keeping one included source per shim preserves the translation-unit boundaries used by
-`Build.ps1`. A manifest check in the UBT module should fail when a row lacks a shim, a shim names a
+`Build.ps1`. UBT validates every manifest row, checks the exact source name in each shim, and rejects
-different file, or an extra shim exists. Do not copy implementation files into the module. The
+missing or extra shims. Do not copy implementation files into the module; standalone and UBT
-standalone and UBT builds then compile the same canonical source bytes.
+compile the same canonical source bytes.
 
-The existing `VoxelForge` module owns the adapter and calls the new module. Its adapter runs on the
+The implemented adapter currently lives in the editor-only `VoxelForgeExploreCommandlet`, not in
-game thread, resolves soft references and asset defaults, preserves array order, and serializes
+`AVoxelWorld`. It runs on the game thread, resolves owner asset data, and serializes settings,
-settings, biome and terrain-op records, strata layouts, passages, seed, voxel size, clip limits and
+strata, passages, seed, voxel scale, clip limits and viewer start into schema-v1 JSON accepted by
-viewer start into the exact schema-v1 document accepted by `FromJson`. It must not serialize
+`FromJson`. It serializes values rather than UObject pointers and sorts map/set members and object
-UObject pointers or depend on unordered map iteration. Snapshot creation returns a descriptive
+keys for determinism. The original asset-derived JSON parses as-is. This check does not yet create
-error for unresolved or unsupported assets. Once created, workers only see the immutable core
+the runtime world snapshot owned by `AVoxelWorld`.
-snapshot and standard C++ results.
 
-The plugin supplies a `JobScheduler` backed by its chosen task system. The adapter submits shape
+The commandlet validation scheduler runs Core compile work at limits 1, 8, and 16; it is not the
-build work and tile jobs to that scheduler, observes generation IDs for cancellation, and discards
+plugin's UE task-system adapter. A runtime implementation still needs to schedule compile/tile work,
-stale results. It copies completed `TileMesh` data into `FVoxelMeshData` or the plugin's current
+observe epochs/cancellation, and copy Core's owned mesh arrays/groups into `FVoxelMeshData` while
-mesh payload on the host side, preserving centimetre positions, normals, UVs, colors, indices and
+retaining the plugin's upload and collision path.
-ground/ceiling/skirt group counts. UObject creation, collision cooking, render-resource changes,
-game-thread application, residency and upload budgets remain in the plugin.
 
-## What the plugin pipeline replaces
+## Planned runtime route: not wired yet
 
-The current plugin's `AVoxelWorld::GenerateTileResult` worker path performs proofs and
+The current plugin's `AVoxelWorld::GenerateTileResult` worker path remains active. It performs
-`UVoxelGenerator::ClassifyTile`, calls `UVoxelMarchingCubesMesher::GenerateMesh`, builds
+proofs and `UVoxelGenerator::ClassifyTile`, calls `UVoxelMarchingCubesMesher::GenerateMesh`, builds
 `RealtimeMesh` streams with `BuildTileStreamSet`, then publishes an epoch-tagged `FChunkResult` for
 game-thread upload/collision handling. `AVoxelWorld::CarveAtPosition`, `CarveBox`, and
 `CarveCapsule` route soft `FVoxelModification` brushes through `UVoxelDiffLayer::ApplyModification`
-and remesh the affected chunks. The adapter replaces those CPU-field and edit operations as
+and remesh the affected chunks. The table below records the intended replacement; no row is wired
-follows:
+into `AVoxelWorld` yet:
 
 | Current call or state | Core API replacement | Keep in the plugin |
 | --- | --- | --- |
@@ -163,17 +147,23 @@ follows:
 | `VoxelClipmapDesiredTiles::Build` tile-set calculation | `desiredTiles` and `prioritizeTiles` | Decide when to request, cancel, retain or evict jobs |
 | `UVoxelDiffLayer::ApplyModification` and affected-chunk scan | `applyEditTransaction` with `densityOffset` brushes carrying signed strength and falloff; regenerate returned LOD keys | Brush budgets, authority sequence, replication, and result acceptance |
 
-Delete plugin-side active-world dispatch when routing these calls; the `World` context is an
+The next round should add `bUseVoxelForgeCore=false` to `AVoxelWorld` and leave the existing path
-explicit object passed to each operation. The plugin's epoch/cancellation checks still reject stale
+unchanged when false. Pass the Core `World` context explicitly. Plugin epoch/cancellation checks
-results, but cannot interrupt an executing core call. Because edit application replaces field edit
+must reject stale results; they cannot interrupt an executing Core call. Drain in-flight Core calls
-state, the host must drain in-flight core calls before applying a transaction and then submit the
+before applying a transaction, then submit affected tiles under a new epoch. Do not move worker
-affected tiles under a new epoch. Do not move worker admission, collision cooking, actor or material
+admission, collision cooking, actor or material creation, or rendering into the library.
-creation, or rendering into the library.
+
+The schema uses Core's 25 cm/voxel scale while the legacy plugin Runtime still defines
+`VOXEL_SIZE=12.5 cm`; define and verify a scale mapping before converting Core centimeter positions
+to plugin mesh payloads. The staged `DA_Settings` says `ClipRadius=6` and `MaxClipLevel=6`, whereas
+the standalone owner JSON says radius 6/max level 8. The adapter test keeps the exported JSON as
+authored and applies `clip_radius=3`/`max_clip_level=8` only in a reference-validation copy.
 
 ## Acceptance record
 
 The `557f6aa` commit is the strict output baseline. The rebuilt namespaced Core matches all 11
-full-detail, whole-view and LOD0–8 hash rows at W1 and W8, with W1/W8 parity. The fresh records are
+full-detail, whole-view and LOD0–8 hash rows at W1 and W8, with W1/W8 parity. The step-29 CPU
+reference also preserves its approved W16 hash set. The fresh W1/W8 records are
 `Core/verification/last_standard_hash_w1.stdout.log`,
 `Core/verification/last_standard_hash_w8.stdout.log`, and
 `Core/verification/final_rebuilt_hash_parity.log`.
@@ -209,3 +199,18 @@ compilation, including `intervals+signs` averaging 95.7 ms on baseline and 114.9
 raw cold runs are in `Core/verification/final_rebuilt_pipeline_*.stdout.log`. API-only `/Ob3` and
 `/Ob1` trials also retained hash parity but were slower, so the build is restored to `/O2 /MP8`.
 The required “no slower” acceptance condition remains outstanding.
+
+## Unreal integration round 1 record
+
+BuildHost linked `VoxelForgeCore` and `VoxelForge`, compiled all 18 manifest shims, and passed the
+real shim-object symbol audit (83,843 `dumpbin` lines / 399 copied Unreal-style type names). Five
+staged owner asset copies matched their source SHA-256 values. The headless editor commandlet
+exported schema-v1 JSON from those assets, parsed it with Core, and matched the four expected hashes
+and 5,642/5,642 walkability at Core compile worker limits 1, 8, and 16. The initial tile generation
+in this adapter check is serial after compile; the worker limits exercise Core compilation. Full
+details and the run ledger are in `UNREAL_INTEGRATION_REPORT.md`.
+
+This round did not add the `AVoxelWorld` switch, runtime task-graph scheduler, `generateTile` result
+conversion, collision upload, epoch flow, or edit-transaction carving. The plugin continues to use
+its existing generation path. Owner hand-off must wait until that runtime path is implemented and
+headlessly validated.

Standalone/UNREAL_INTEGRATION_REPORT.md

@@ -0,0 +1,131 @@
+# Unreal Core integration report — round 1
+
+Date: 2026-10-08  
+Branch: `unreal/core-integration`
+
+## Result
+
+Goals 1 and 2 are complete in BuildHost. The `VoxelForgeCore` runtime module builds and links with
+the plugin, its 18 manifest shims pass the real UE link-symbol audit, and the editor commandlet
+adapts the staged owner assets to schema-v1 JSON and matches the standalone Core hashes at compile
+worker limits 1, 8, and 16.
+
+The `AVoxelWorld` runtime route is not implemented. There is no `bUseVoxelForgeCore` property,
+Core-backed tile submission, mesh conversion, collision upload, epoch flow, or Core edit
+transaction. No owner hand-off switch is ready to flip. The existing plugin generation route remains
+the active route.
+
+## Files and architecture
+
+- `Source/VoxelForgeCore/VoxelForgeCore.Build.cs` defines the runtime module. It validates the
+  canonical manifest and shim inventory, uses C++20/precise FP with no PCH or unity, and exposes
+  only `Standalone/Core/include` publicly.
+- `Source/VoxelForgeCore/Private/Manifest/` contains one include shim for each of the 18 rows in
+  `Standalone/Core/core_sources.txt`. Canonical source files remain under `Standalone/`.
+- `Source/VoxelForgeCore/Private/ModuleEntry/` supplies the Unreal module entry and the isolated
+  include of the engine `CoreMinimal.h`.
+- `VoxelForge.Build.cs` and `VoxelForgeEditor.Build.cs` depend on `VoxelForgeCore`.
+- `Standalone/Core/include/VoxelForgeCore/VoxelForgeCore.h` defines the empty standalone export
+  macro and the UBT module export macro. No Core generation logic changed in this round.
+- `Source/VoxelForgeEditor/Private/VoxelForgeExploreCommandlet.cpp` serializes the owner assets on
+  the game thread, sorts map/set members and JSON object keys, parses the emitted JSON through
+  `ResolvedWorldSnapshot::FromJson`, and validates full clipmap tile hashes. Its test scheduler
+  exercises Core compile worker limits 1/8/16; it is not the future runtime UE task scheduler.
+
+## BuildHost evidence
+
+`Tools/BuildVoxelForgeCoreHost.ps1` stages plugin source and copied owner assets only under
+`Saved/BuildHost/HostProject`. The final UBT run completed successfully:
+
+- `UnrealEditor-VoxelForgeCore.dll` and `UnrealEditor-VoxelForge.dll` linked in UnrealEditor
+  Win64 Development.
+- All 18 expected Core shim objects were found and audited.
+- `CheckCoreSymbols.ps1` reported `CORE_LINK_SAFETY_PASS`: 83,843 `dumpbin` symbol lines checked
+  against 399 copied Unreal-style type names, with no conflicts.
+- Five staged asset copies matched their source SHA-256 values:
+
+| Asset | SHA-256 |
+|---|---|
+| `DA_Settings` | `5D2977F57E75A63B6B73499CD6E0AA7FBBF3718CE7F70318107BF922F0819AB7` |
+| `DA_Strate1` | `CDA1F985E589F28CA6E93A068FECC3CA92487E4AD5700F2C301C4B563E40E5F9` |
+| `DA_Strate2` | `02F56A18CED991BAF93DFB2F69438152275E8353B5E279C1CB7DD6E079E352E2` |
+| `DA_Strate3` | `F47437F8D156C608AA06E40C5B76716ED4A19FA0F057688E7FECC04DC976428C` |
+| `DA_Strate4` | `279570AE3CBA7B3507269C8209A7C931EEB7A15CC3241CE07B50120996B1C656` |
+
+The final logs are `Saved/BuildHost/UBT-CoreIntegration.log` and
+`Saved/BuildHost/VoxelForgeCore_ue_link_safety.log`.
+
+## Headless adapter evidence
+
+`Tools/TestVoxelForgeCoreAdapterHost.ps1` launches the isolated BuildHost Unreal commandlet at
+Normal priority. It sampled about 4.30 GiB private memory, below the 8 GiB limit. The generated JSON
+is retained at
+`Saved/BuildHost/HostProject/Plugins/VoxelForge/Saved/CoreAdapterValidation/Output/owner_world.json`;
+the commandlet log is beside it under `Logs/CoreAdapterValidation.log`.
+
+For Core compile worker limits 1, 8, and 16, the validator then generated and hashed the 2,226
+desired tiles serially. Each pass matched:
+
+| Hash | Expected / actual |
+|---|---|
+| Density | `0xdb2991c73215af4c` |
+| Mesh | `0x8236c5edd7fc8e4f` |
+| Payload | `0x4c48fa75a543d58e` |
+| Topology | `0xbea22e76b34a4dfc` |
+| Passage walkability | `5,642 / 5,642` |
+
+The adapter first parses the unmodified asset-derived export. The test then reparses a validation
+copy with the standalone CPU benchmark view settings `clip_radius=3` and `max_clip_level=8`. The
+final export itself retains the asset values.
+
+## Differences and remaining work
+
+- The staged `DA_Settings` exports `ClipRadius=6` and `MaxClipLevel=6`; the standalone owner JSON
+  has `clip_radius=6` and `max_clip_level=8`. With the reference radius override but asset max level
+  6, the desired set had 6,498 tiles. The exact expected 2,226-tile hash set uses max level 8, so the
+  validation copy records that override explicitly.
+- Core schema and mesh output use 25 cm per voxel. The existing plugin Runtime defines
+  `VOXEL_SIZE=12.5 cm`. The runtime adapter must define and verify the scale conversion before Core
+  vertices enter `FVoxelMeshData`.
+- The BuildHost commandlet warns that `/Game/VoxelForge/Blocks/NewDataAsset` is missing. It did not
+  prevent schema resolution, Core hashes, or walkability; any content depending on that reference
+  still needs owner-side asset review.
+- Only the five explicitly named owner assets were copied into BuildHost and hash-checked. No owner
+  editor was opened, and no owner project build or asset write was performed.
+- Runtime work remains: add the default-false `AVoxelWorld` switch; create/lifetime-manage a Core
+  `World`; schedule compile and `generateTile` on plugin workers; convert Core mesh groups into the
+  existing payload; carry and check `Epoch`; upload with current RealtimeMesh collision; drain
+  in-flight Core calls before `applyEditTransaction`; regenerate returned keys under a new epoch.
+- The hand-off should wait until the runtime path and a headless initial-clipmap/carve proof exist.
+
+## Failed runs, retries, and crashes
+
+No run exceeded the 15-minute limit. No process returned `0xC0000142`, so no automatic retry was
+used. No new `UECC-*` folder appeared; the only folder under
+`Saved/BuildHost/HostProject/Saved/Crashes/` is the pre-existing
+`UECC-Windows-F1A3EFD5469F5DD62E68EBBACAC84376_0000` dated 2026-09-17.
+
+The run history, including corrected failures, is:
+
+| Run | Outcome |
+|---|---|
+| Early UBT validation/build attempts 1–7 | Failed in sequence on a shim-preamble regex, stale staged Build.cs, duplicated UHT source tree, missing API export/incorrect CoreMinimal and forwarding-header paths, malformed macro quoting, canonical C4456/C4668 warnings-as-errors, and editor-only `FFilePath` compat fields. Each was corrected; no source `Binaries/`, `Intermediate/`, or generated header was edited. |
+| Initial successful BuildHost UBT runs | Passed after defining the module export macro, isolating the actual engine CoreMinimal include, and setting `WITH_EDITORONLY_DATA=0`. They established module links and the first symbol audit. |
+| Adapter commandlet: first launch | Failed the commandlet's output-path guard because `-out` was outside the staged plugin `Saved` directory. The path was moved under BuildHost. |
+| Adapter commandlet: DDC path | Exited 3 with a fatal error because the DDC path exceeded Unreal's 119-character limit. The staged DDC was moved to the shorter `Saved/BuildHost/VFCoreAdapterDDC`; no new UECC folder appeared. |
+| Adapter commandlet: scale | Failed schema resolution with `voxel_size_cm=12.5`; the adapter was corrected to emit Core's standalone 25 cm scale. |
+| Adapter commandlet: clip bounds | The original radius 6 exceeded the validation compiler's 160-million-node bound. The harness now applies the documented radius 3 override to a copy only. |
+| Adapter commandlet: hash comparison | Generated 6,498 tiles and walkability 5,642/5,642, but hashes differed because the staged asset max level is 6 and the standalone reference is 8. The validation copy now applies max level 8. |
+| UBT/commandlet wrapper status | Unreal logged successful results, but two `Start-Process` handles exposed empty exit-code fields; one commandlet fallback also looked for a marker absent from the abslog. The scripts now require UBT's `Result: Succeeded` or the commandlet's `result 0` plus exact parity markers. Final UBT and adapter harness runs passed. |
+| PowerShell helper checks | Two intermediate parser attempts failed while adding the UBT fallback; one parser check exposed a multiline `-and` in the commandlet fallback; a separate parser invocation also hit nested-shell variable expansion. These affected no Unreal run; the scripts were corrected and parsed successfully before final execution. |
+| Staged standalone viewer build | The first launch failed before compilation because Start-Process split a path containing spaces. The corrected BuildHost run compiled the Core library and passed its symbol audit, then the viewer link failed with 12 unresolved `VoxelForgeGpuFarViewer` symbols: `Standalone/Build.ps1` does not link the `GpuFieldPort.cpp` implementation still referenced by `StandaloneViewer.cpp`. No canonical standalone build file was edited. |
+
+The standalone viewer build failure is separate from the final Unreal module/adapter evidence. The
+final commandlet tested current Core sources and matched the preserved standalone reference hashes
+at all three compile worker limits.
+
+## Owner hand-off
+
+There is nothing to flip yet. Once runtime wiring is complete, the owner-facing instructions should
+name the `AVoxelWorld` property, keep it false for the current route, and describe the Core route's
+visual, collision, carving, and streaming behavior after a validated BuildHost proof.

Tools/VoxelForgeTest.ps1

@@ -587,6 +587,20 @@ function Copy-DirectoryContents([string]$Source, [string]$Destination) {
     }
 }
 
+function Sync-StagedCoreSources {
+    # UBT reads these canonical files through the plugin module's include roots. Keep the host
+    # copy source-only; Core verification logs and standalone binaries are not part of the module.
+    $stageStandalone = Join-Path $StagePlugin 'Standalone'
+    $sourceStandalone = Join-Path $PluginRoot 'Standalone'
+    Ensure-Directory $stageStandalone
+    foreach ($relative in @('Core\include', 'Core\src', 'Compat', 'Source')) {
+        Copy-DirectoryContents (Join-Path $sourceStandalone $relative) `
+            (Join-Path $stageStandalone $relative)
+    }
+    $null = Copy-Item -LiteralPath (Join-Path $sourceStandalone 'Core\core_sources.txt') `
+        -Destination (Join-Path $stageStandalone 'Core\core_sources.txt') -Force -PassThru
+}
+
 function Sync-StagedHost {
     if (-not (Test-Path -LiteralPath $HostProject -PathType Leaf)) {
         throw "Staged host project is missing: $HostProject"
@@ -602,6 +616,7 @@ function Sync-StagedHost {
         Remove-Item -LiteralPath $stageSource -Recurse -Force
     }
     Copy-DirectoryContents (Join-Path $PluginRoot 'Source') $stageSource
+    Sync-StagedCoreSources
     $null = Copy-Item -LiteralPath (Join-Path $PluginRoot 'VoxelForge.uplugin') `
         -Destination (Join-Path $StagePlugin 'VoxelForge.uplugin') -Force -PassThru
 

VoxelForge.uplugin

@@ -21,6 +21,11 @@
 		}
 	],
 	"Modules": [
+		{
+			"Name": "VoxelForgeCore",
+			"Type": "Runtime",
+			"LoadingPhase": "Default"
+		},
 		{
 			"Name": "VoxelForge",
 			"Type": "Runtime",