refactor(runtime): own canonical entity and object lifetime

Introduce one presentation-free RuntimeEntityObjectLifetime for the exact entity directory and ClientObjectTable. Make GameWindow, graphical projections, retained UI, interaction, session routing, create/delete integration, and reset borrow that owner while preserving synchronous retail ordering, dormant retention, and retry semantics.

Co-authored-by: Codex <codex@openai.com>

src/AcDream.App/Composition/LivePresentationComposition.cs

@@ -25,6 +25,7 @@ using AcDream.Core.Rendering;
 using AcDream.Core.Selection;
 using AcDream.Core.Vfx;
 using AcDream.Core.World;
+using AcDream.Runtime.Entities;
 using DatReaderWriter;
 using DatReaderWriter.DBObjs;
 using Silk.NET.OpenGL;
@@ -44,7 +45,7 @@ internal sealed record LivePresentationDependencies(
     WorldGameState WorldGameState,
     WorldEvents WorldEvents,
     SelectionState Selection,
-    ClientObjectTable Objects,
+    RuntimeEntityObjectLifetime EntityObjects,
     LiveEntityRuntimeSlot RuntimeSlot,
     DeferredLiveEntityMotionRuntimeBindings MotionBindings,
     DeferredEntityEffectAdvanceSource EffectAdvance,
@@ -377,7 +378,8 @@ internal sealed class LivePresentationCompositionPhase
                 worldState,
                 new CompositeLiveEntityResourceLifecycle(
                     [.. resourceOwners]),
-                componentLifecycle);
+                componentLifecycle,
+                d.EntityObjects);
             var liveRuntimeLease = scope.Own(
                 "canonical live-entity runtime",
                 liveEntities,
@@ -487,7 +489,7 @@ internal sealed class LivePresentationCompositionPhase
                 () => new EquippedChildRenderController(
                     content.Dats,
                     d.DatLock,
-                    d.Objects,
+                    d.EntityObjects.Objects,
                     liveEntities,
                     d.EffectPoses,
                     parentAcceptance.TryAccept,
@@ -675,7 +677,7 @@ internal sealed class LivePresentationCompositionPhase
             static value => value.Dispose());
         var selectionQuery = new WorldSelectionQuery(
             liveEntities,
-            d.Objects,
+            d.EntityObjects.Objects,
             selectionScene,
             () => d.PlayerIdentity.ServerGuid,
             interaction.LateBindings.SelectionCamera.Snapshot,
@@ -699,7 +701,7 @@ internal sealed class LivePresentationCompositionPhase
                 }
             });
         var radarSnapshotProvider = new RadarSnapshotProvider(
-            d.Objects,
+            d.EntityObjects.Objects,
             liveEntities,
             () => liveEntities.Snapshots,
             playerGuid: () => d.PlayerIdentity.ServerGuid,

src/AcDream.App/Composition/SessionPlayerComposition.cs

@@ -26,6 +26,7 @@ using AcDream.Core.Player;
 using AcDream.Core.Social;
 using AcDream.Core.Spells;
 using AcDream.Core.World;
+using AcDream.Runtime.Entities;
 using AcDream.Runtime.Session;
 using Silk.NET.Windowing;
 
@@ -47,7 +48,7 @@ internal sealed record SessionPlayerDependencies(
     WorldGameState WorldGameState,
     WorldEvents WorldEvents,
     SelectionState Selection,
-    ClientObjectTable Objects,
+    RuntimeEntityObjectLifetime EntityObjects,
     EntityClassificationCache ClassificationCache,
     LiveEntityRuntimeSlot RuntimeSlot,
     LiveEntityAnimationRuntimeView<LiveEntityAnimationState> AnimatedEntities,
@@ -475,14 +476,14 @@ internal sealed class SessionPlayerCompositionPhase
         var dormantLiveEntities = new DormantLiveEntityStore();
         var deletion = new LiveEntityDeletionController(
             live.LiveEntities,
-            d.Objects,
+            d.EntityObjects,
             teardown,
             d.PlayerIdentity,
             dormantLiveEntities,
             d.Options.DumpLiveSpawns ? d.Log : null);
         var hydration = new LiveEntityHydrationController(
             live.LiveEntities,
-            d.Objects,
+            d.EntityObjects,
             d.DatLock,
             projectionMaterializer,
             new LiveEntityRelationshipProjection(live.EquippedChildren),
@@ -505,7 +506,7 @@ internal sealed class SessionPlayerCompositionPhase
 
         var networkUpdates = new LiveEntityNetworkUpdateController(
             live.LiveEntities,
-            d.Objects,
+            d.EntityObjects.Objects,
             hydration,
             live.EntityEffects,
             live.Presentation,
@@ -574,7 +575,7 @@ internal sealed class SessionPlayerCompositionPhase
                     new CombatAttackTargetSource(
                         d.Selection,
                         live.LiveEntities,
-                        d.Objects,
+                        d.EntityObjects.Objects,
                         d.PlayerIdentity),
                     d.Settings,
                     d.PlayerController,
@@ -809,7 +810,7 @@ internal sealed class SessionPlayerCompositionPhase
                 d.Shortcuts,
                 d.DesiredComponents),
             new LiveSessionDomainRuntime(
-                d.Objects,
+                d.EntityObjects,
                 d.LocalPlayer,
                 d.Spellbook,
                 d.Combat,
@@ -873,7 +874,7 @@ internal sealed class SessionPlayerCompositionPhase
         var combatCommand = new LiveCombatModeCommandController(
             new LiveSessionCombatModeAuthority(sessionHost),
             new LocalPlayerCombatEquipmentSource(
-                d.Objects,
+                d.EntityObjects.Objects,
                 d.PlayerIdentity),
             d.Combat,
             new ItemInteractionCombatModeIntentSink(
@@ -890,7 +891,7 @@ internal sealed class SessionPlayerCompositionPhase
             liveSessionCommands,
             d.PlayerIdentity,
             live.LiveEntities,
-            d.Objects,
+            d.EntityObjects.Objects,
             d.Chat,
             d.PlayerController,
             worldReveal,

src/AcDream.App/Net/LiveSessionRuntimeFactory.cs

@@ -23,6 +23,7 @@ using AcDream.Core.Social;
 using AcDream.Core.Spells;
 using AcDream.Core.World;
 using AcDream.Content;
+using AcDream.Runtime.Entities;
 using AcDream.Runtime.Session;
 using AcDream.UI.Abstractions.Panels.Chat;
 using AcDream.UI.Abstractions.Panels.Vitals;
@@ -41,7 +42,7 @@ internal sealed record LiveSessionPlayerRuntime(
     DesiredComponentSnapshotState DesiredComponents);
 
 internal sealed record LiveSessionDomainRuntime(
-    ClientObjectTable Objects,
+    RuntimeEntityObjectLifetime EntityObjects,
     LocalPlayerState LocalPlayer,
     Spellbook Spellbook,
     CombatState Combat,
@@ -173,7 +174,7 @@ internal sealed class LiveSessionRuntimeFactory
         ExternalContainer = () => _domain.ExternalContainers.Reset(),
         InteractionAndSelection = _interaction.SelectionInteractions.ResetSession,
         SelectionPresentation = _world.SelectionScene.Reset,
-        ObjectTable = _domain.Objects.Clear,
+        ObjectTable = _domain.EntityObjects.ClearObjects,
         Spellbook = _domain.Spellbook.Clear,
         MagicRuntime = () => _ui.Magic?.Reset(),
         CombatAttack = _interaction.CombatAttack.ResetSession,
@@ -260,7 +261,7 @@ internal sealed class LiveSessionRuntimeFactory
     }
 
     private LiveInventorySessionBindings CreateInventoryBindings() => new(
-        _domain.Objects,
+        _domain.EntityObjects.Objects,
         _domain.LocalPlayer,
         PlayerGuid: () => _player.Identity.ServerGuid,
         OnShortcuts: list => _player.Shortcuts.Items = list,
@@ -333,7 +334,7 @@ internal sealed class LiveSessionRuntimeFactory
             ShowSystemMessage: text => _domain.Chat.OnSystemMessage(text, 0u),
             ShowWeenieError: code => _domain.Chat.OnWeenieError(code, null),
             PlayerPublicWeenieBitfield: () =>
-                _domain.Objects.Get(_player.Identity.ServerGuid)?
+                _domain.EntityObjects.Objects.Get(_player.Identity.ServerGuid)?
                     .PublicWeenieBitfield,
             ClientVersion: () =>
                 typeof(LiveSessionRuntimeFactory).Assembly
@@ -351,7 +352,7 @@ internal sealed class LiveSessionRuntimeFactory
             SaveAutoUi: () => _ui.RetailUi?.SaveLayout(),
             LoadAutoUi: () => _ui.RetailUi?.RestoreLayout(),
             IsAway: () =>
-                _domain.Objects.Get(_player.Identity.ServerGuid)?
+                _domain.EntityObjects.Objects.Get(_player.Identity.ServerGuid)?
                     .Properties.GetBool(0x6Eu) == true,
             SetAway: session.SendSetAfkMode,
             SetAwayMessage: session.SendSetAfkMessage,

src/AcDream.App/Rendering/GameWindow.cs

@@ -6,6 +6,7 @@ using AcDream.App.Rendering.Wb;
 using AcDream.App.Settings;
 using AcDream.App.World;
 using AcDream.Content;
+using AcDream.Runtime.Entities;
 using AcDream.Runtime.Session;
 using DatReaderWriter;
 using Silk.NET.Input;
@@ -340,7 +341,7 @@ public sealed class GameWindow :
     // installs that immutable table once DatCollection opens in OnLoad.
     public AcDream.Core.Spells.SpellTable SpellTable => SpellBook.Metadata;
     public readonly AcDream.Core.Spells.Spellbook SpellBook = null!;
-    public readonly AcDream.Core.Items.ClientObjectTable Objects = new();
+    private readonly RuntimeEntityObjectLifetime _runtimeEntityObjects = new();
     /// <summary>Persisted hotbar shortcuts from the last PlayerDescription (D.5.1 toolbar source).</summary>
     private readonly ShortcutSnapshotState _shortcutSnapshots = new();
     public IReadOnlyList<AcDream.Core.Items.ShortcutEntry> Shortcuts
@@ -1260,7 +1261,7 @@ public sealed class GameWindow :
                     _combatAttackOperations,
                     _selection,
                     _externalContainers,
-                    Objects,
+                    _runtimeEntityObjects.Objects,
                     contentEffectsAudio.MagicCatalog,
                     SpellBook,
                     Chat,
@@ -1314,7 +1315,7 @@ public sealed class GameWindow :
                     _worldGameState,
                     _worldEvents,
                     _selection,
-                    Objects,
+                    _runtimeEntityObjects,
                     _liveEntityRuntimeSlot,
                     _liveEntityMotionBindings,
                     _entityEffectAdvance,
@@ -1372,7 +1373,7 @@ public sealed class GameWindow :
                     _worldGameState,
                     _worldEvents,
                     _selection,
-                    Objects,
+                    _runtimeEntityObjects,
                     _classificationCache,
                     _liveEntityRuntimeSlot,
                     _animatedEntities,

src/AcDream.App/World/LiveEntityDeletionController.cs

@@ -1,7 +1,7 @@
 using AcDream.App.Input;
-using AcDream.Core.Items;
 using AcDream.Core.Net;
 using AcDream.Core.Net.Messages;
+using AcDream.Runtime.Entities;
 
 namespace AcDream.App.World;
 
@@ -17,7 +17,7 @@ internal interface ILiveEntityPruneSink
 internal sealed class LiveEntityDeletionController : ILiveEntityPruneSink
 {
     private readonly LiveEntityRuntime _runtime;
-    private readonly ClientObjectTable _objects;
+    private readonly RuntimeEntityObjectLifetime _entityObjects;
     private readonly ILiveEntityTeardownCoordinator _teardown;
     private readonly ILocalPlayerIdentitySource _identity;
     private readonly DormantLiveEntityStore _dormant;
@@ -25,14 +25,15 @@ internal sealed class LiveEntityDeletionController : ILiveEntityPruneSink
 
     public LiveEntityDeletionController(
         LiveEntityRuntime runtime,
-        ClientObjectTable objects,
+        RuntimeEntityObjectLifetime entityObjects,
         ILiveEntityTeardownCoordinator teardown,
         ILocalPlayerIdentitySource identity,
         DormantLiveEntityStore? dormant = null,
         Action<string>? diagnostic = null)
     {
         _runtime = runtime ?? throw new ArgumentNullException(nameof(runtime));
-        _objects = objects ?? throw new ArgumentNullException(nameof(objects));
+        _entityObjects = entityObjects
+            ?? throw new ArgumentNullException(nameof(entityObjects));
         _teardown = teardown ?? throw new ArgumentNullException(nameof(teardown));
         _identity = identity ?? throw new ArgumentNullException(nameof(identity));
         _dormant = dormant ?? new DormantLiveEntityStore();
@@ -56,11 +57,10 @@ internal sealed class LiveEntityDeletionController : ILiveEntityPruneSink
         bool removed = _runtime.UnregisterLiveEntity(
             delete,
             isLocalPlayer: false,
-            beforeTeardown: () =>
+            removeRetainedObject: true);
-                ObjectTableWiring.ApplyEntityDelete(_objects, delete));
         bool removedDormant = _dormant.RemoveExact(delete);
         if (!removed && removedDormant)
-            ObjectTableWiring.ApplyEntityDelete(_objects, delete);
+            _entityObjects.ApplyAcceptedDormantDelete(delete);
         if (removed)
         {
             _dormant.RemoveExact(delete);

src/AcDream.App/World/LiveEntityHydrationController.cs

@@ -1,6 +1,5 @@
 using AcDream.App.Rendering;
 using AcDream.App.Input;
-using AcDream.Core.Items;
 using AcDream.Core.Net;
 using AcDream.Core.Net.Messages;
 using AcDream.Core.World;
@@ -169,7 +168,7 @@ internal interface ILiveEntityWorldOriginCoordinator
 internal sealed class LiveEntityHydrationController : ILiveEntityLandblockLoadedSink
 {
     private readonly LiveEntityRuntime _runtime;
-    private readonly ClientObjectTable _objects;
+    private readonly RuntimeEntityObjectLifetime _entityObjects;
     private readonly object _datLock;
     private readonly ILiveEntityProjectionMaterializer _materializer;
     private readonly ILiveEntityRelationshipProjection _relationships;
@@ -193,7 +192,7 @@ internal sealed class LiveEntityHydrationController : ILiveEntityLandblockLoaded
 
     public LiveEntityHydrationController(
         LiveEntityRuntime runtime,
-        ClientObjectTable objects,
+        RuntimeEntityObjectLifetime entityObjects,
         object datLock,
         ILiveEntityProjectionMaterializer materializer,
         ILiveEntityRelationshipProjection relationships,
@@ -207,7 +206,8 @@ internal sealed class LiveEntityHydrationController : ILiveEntityLandblockLoaded
         Action<string>? diagnostic = null)
     {
         _runtime = runtime ?? throw new ArgumentNullException(nameof(runtime));
-        _objects = objects ?? throw new ArgumentNullException(nameof(objects));
+        _entityObjects = entityObjects
+            ?? throw new ArgumentNullException(nameof(entityObjects));
         _datLock = datLock ?? throw new ArgumentNullException(nameof(datLock));
         _materializer = materializer ?? throw new ArgumentNullException(nameof(materializer));
         _relationships = relationships ?? throw new ArgumentNullException(nameof(relationships));
@@ -285,15 +285,13 @@ internal sealed class LiveEntityHydrationController : ILiveEntityLandblockLoaded
                 if (_runtime.IsCurrentCreateIntegration(
                         canonical,
                         createIntegrationVersion)
-                    && ObjectTableWiring.ApplyEntitySpawn(
+                    && _entityObjects.ApplyAcceptedSpawn(
-                        _objects,
+                        canonical,
+                        createIntegrationVersion,
                         spawn,
                         replaceGeneration: result.Disposition is
                                 AcDream.Core.Physics.CreateObjectTimestampDisposition.NewGeneration
-                            || dormantDisposition is DormantCreateDisposition.NewGeneration,
+                            || dormantDisposition is DormantCreateDisposition.NewGeneration)
-                        accepting: () => _runtime.IsCurrentCreateIntegration(
-                            canonical,
-                            createIntegrationVersion))
                     && _runtime.IsCurrentCreateIntegration(
                         canonical,
                         createIntegrationVersion))

src/AcDream.App/World/LiveEntityRuntime.cs

@@ -448,6 +448,7 @@ public sealed class LiveEntityRuntime : ILiveEntityRadarSource
     private readonly GpuWorldState _spatial;
     private readonly ILiveEntityResourceLifecycle _resources;
     private readonly ILiveEntityRuntimeComponentLifecycle _runtimeComponentLifecycle;
+    private readonly RuntimeEntityObjectLifetime _entityObjects;
     private readonly RuntimeEntityDirectory _directory;
     private readonly LiveEntityProjectionStore _projections;
     // Logical components survive retail's 25-second leave-visibility lifetime.
@@ -471,12 +472,12 @@ public sealed class LiveEntityRuntime : ILiveEntityRadarSource
     public LiveEntityRuntime(
         GpuWorldState spatial,
         ILiveEntityResourceLifecycle resources,
-        uint firstLocalEntityId = FirstLiveEntityId)
+        RuntimeEntityObjectLifetime entityObjects)
         : this(
             spatial,
             resources,
             NullLiveEntityRuntimeComponentLifecycle.Instance,
-            firstLocalEntityId)
+            entityObjects)
     {
     }
 
@@ -484,12 +485,12 @@ public sealed class LiveEntityRuntime : ILiveEntityRadarSource
         GpuWorldState spatial,
         ILiveEntityResourceLifecycle resources,
         Action<LiveEntityRecord> tearDownRuntimeComponents,
-        uint firstLocalEntityId = FirstLiveEntityId)
+        RuntimeEntityObjectLifetime entityObjects)
         : this(
             spatial,
             resources,
             new DelegateLiveEntityRuntimeComponentLifecycle(tearDownRuntimeComponents),
-            firstLocalEntityId)
+            entityObjects)
     {
     }
 
@@ -497,13 +498,15 @@ public sealed class LiveEntityRuntime : ILiveEntityRadarSource
         GpuWorldState spatial,
         ILiveEntityResourceLifecycle resources,
         ILiveEntityRuntimeComponentLifecycle? runtimeComponentLifecycle,
-        uint firstLocalEntityId = FirstLiveEntityId)
+        RuntimeEntityObjectLifetime entityObjects)
     {
         _spatial = spatial ?? throw new ArgumentNullException(nameof(spatial));
         _resources = resources ?? throw new ArgumentNullException(nameof(resources));
         _runtimeComponentLifecycle = runtimeComponentLifecycle
             ?? throw new ArgumentNullException(nameof(runtimeComponentLifecycle));
-        _directory = new RuntimeEntityDirectory(firstLocalEntityId);
+        _entityObjects = entityObjects
+            ?? throw new ArgumentNullException(nameof(entityObjects));
+        _directory = _entityObjects.Entities;
         _projections = new LiveEntityProjectionStore(_directory);
         _spatial.LiveProjectionVisibilityChanged += OnSpatialVisibilityChanged;
     }
@@ -1187,6 +1190,7 @@ public sealed class LiveEntityRuntime : ILiveEntityRadarSource
     public bool UnregisterLiveEntity(
         DeleteObject.Parsed delete,
         bool isLocalPlayer,
+        bool removeRetainedObject = false,
         Action? beforeTeardown = null)
     {
         if (_isRegisteringResources)
@@ -1208,9 +1212,13 @@ public sealed class LiveEntityRuntime : ILiveEntityRadarSource
             && (record.DeleteAcceptedForTeardown
                 || _isClearing
                 || _sessionClearPendingFinalization);
+        RuntimeEntityDeleteAcceptance? acceptedDelete = null;
         if (!retryingAcceptedDelete)
         {
-            if (!_directory.TryDelete(delete, isLocalPlayer))
+            if (!_entityObjects.TryAcceptDelete(
+                    delete,
+                    isLocalPlayer,
+                    out acceptedDelete))
                 return false;
             AdvanceLifetimeMutation(delete.Guid);
             ParentAttachments.DeleteGeneration(delete.Guid, delete.InstanceSequence);
@@ -1258,6 +1266,18 @@ public sealed class LiveEntityRuntime : ILiveEntityRadarSource
         {
             if (!retryingAcceptedDelete)
             {
+                if (removeRetainedObject)
+                {
+                    try
+                    {
+                        _entityObjects.CompleteAcceptedDelete(acceptedDelete!);
+                    }
+                    catch (Exception error)
+                    {
+                        (failures ??= new List<Exception>()).Add(error);
+                    }
+                }
+
                 try
                 {
                     beforeTeardown?.Invoke();

src/AcDream.Core.Net/ObjectTableWiring.cs

@@ -10,7 +10,8 @@ namespace AcDream.Core.Net;
 /// 64-bit qualities (experience), SetStackSize (0x0197) = stack count,
 /// InventoryRemoveObject (0x0024) = inventory-view removal.
 /// CreateObject/DeleteObject application remains exposed as pure helpers so
-/// the App live-entity owner can freshness-gate the shared projections first.
+/// the Runtime entity/object lifetime owner can freshness-gate the canonical
+/// incarnation before either graphical or retained-object projections mutate.
 /// Retail: ACCObjectMaint::CreateObject / DeleteObject (the weenie_object_table side).
 /// </summary>
 public static class ObjectTableWiring

src/AcDream.Runtime/Entities/RuntimeEntityObjectLifetime.cs

@@ -0,0 +1,135 @@
+using AcDream.Core.Items;
+using AcDream.Core.Net;
+using AcDream.Core.Net.Messages;
+
+namespace AcDream.Runtime.Entities;
+
+/// <summary>
+/// One exact DeleteObject acceptance issued by a
+/// <see cref="RuntimeEntityObjectLifetime"/>. The graphical host retires the
+/// active identity before returning this token to the Runtime owner for the
+/// retained-object mutation, preserving retail callback order.
+/// </summary>
+public sealed class RuntimeEntityDeleteAcceptance
+{
+    internal RuntimeEntityDeleteAcceptance(
+        RuntimeEntityObjectLifetime owner,
+        DeleteObject.Parsed delete)
+    {
+        Owner = owner;
+        Delete = delete;
+    }
+
+    internal RuntimeEntityObjectLifetime Owner { get; }
+    internal bool Completed { get; set; }
+    public DeleteObject.Parsed Delete { get; }
+}
+
+/// <summary>
+/// Presentation-free ownership root for one session's canonical entity and
+/// retained object lifetimes. Graphical and direct hosts borrow these exact
+/// instances; they never allocate a second directory or object table.
+/// </summary>
+public sealed class RuntimeEntityObjectLifetime
+{
+    public RuntimeEntityObjectLifetime(
+        uint firstLocalEntityId = RuntimeEntityDirectory.FirstLocalEntityId)
+    {
+        Entities = new RuntimeEntityDirectory(firstLocalEntityId);
+        Objects = new ClientObjectTable();
+    }
+
+    public RuntimeEntityDirectory Entities { get; }
+    public ClientObjectTable Objects { get; }
+
+    /// <summary>
+    /// Applies the retained-object half of an accepted CreateObject while the
+    /// exact canonical incarnation and its integration version remain current.
+    /// Object-table callbacks are synchronous and may re-enter entity lifetime,
+    /// so the acceptance predicate is checked before, during, and after apply.
+    /// </summary>
+    public bool ApplyAcceptedSpawn(
+        RuntimeEntityRecord canonical,
+        ulong expectedCreateIntegrationVersion,
+        WorldSession.EntitySpawn spawn,
+        bool replaceGeneration)
+    {
+        ArgumentNullException.ThrowIfNull(canonical);
+        if (canonical.ServerGuid != spawn.Guid
+            || canonical.Incarnation != spawn.InstanceSequence)
+        {
+            return false;
+        }
+
+        bool IsCurrent() =>
+            Entities.IsCurrent(canonical)
+            && canonical.CreateIntegrationVersion
+                == expectedCreateIntegrationVersion;
+
+        return IsCurrent()
+            && ObjectTableWiring.ApplyEntitySpawn(
+                Objects,
+                spawn,
+                replaceGeneration,
+                IsCurrent)
+            && IsCurrent();
+    }
+
+    /// <summary>
+    /// Accepts the exact DeleteObject generation without yet publishing the
+    /// retained-object removal. This split lets the graphical host retire the
+    /// active identity first, matching the established reentrant callback
+    /// order, while Runtime remains the only freshness authority.
+    /// </summary>
+    public bool TryAcceptDelete(
+        DeleteObject.Parsed delete,
+        bool isLocalPlayer,
+        out RuntimeEntityDeleteAcceptance acceptance)
+    {
+        if (!Entities.TryDelete(delete, isLocalPlayer))
+        {
+            acceptance = null!;
+            return false;
+        }
+
+        acceptance = new RuntimeEntityDeleteAcceptance(this, delete);
+        return true;
+    }
+
+    /// <summary>
+    /// Completes a previously accepted delete exactly once. Marking the token
+    /// complete before synchronous callbacks preserves the current retry rule:
+    /// a throwing observer does not replay an already-committed removal.
+    /// </summary>
+    public void CompleteAcceptedDelete(
+        RuntimeEntityDeleteAcceptance acceptance)
+    {
+        ArgumentNullException.ThrowIfNull(acceptance);
+        if (!ReferenceEquals(acceptance.Owner, this))
+        {
+            throw new InvalidOperationException(
+                "A delete acceptance belongs to a different Runtime lifetime.");
+        }
+        if (acceptance.Completed)
+        {
+            throw new InvalidOperationException(
+                "A delete acceptance has already been completed.");
+        }
+
+        acceptance.Completed = true;
+        ObjectTableWiring.ApplyEntityDelete(Objects, acceptance.Delete);
+    }
+
+    /// <summary>
+    /// Applies a delete accepted by the dormant exact-incarnation owner after
+    /// the active Runtime directory correctly reports no live record.
+    /// </summary>
+    public void ApplyAcceptedDormantDelete(DeleteObject.Parsed delete) =>
+        ObjectTableWiring.ApplyEntityDelete(Objects, delete);
+
+    /// <summary>
+    /// Clears retained object state at the Runtime-owned reset stage. App
+    /// projection teardown remains a later acknowledged stage.
+    /// </summary>
+    public void ClearObjects() => Objects.Clear();
+}

tests/AcDream.App.Tests/Combat/CombatAttackTargetSourceTests.cs

@@ -97,7 +97,7 @@ public sealed class CombatAttackTargetSourceTests
                 0x0101_FFFFu,
                 new LandBlock(),
                 Array.Empty<WorldEntity>()));
-            Runtime = new LiveEntityRuntime(spatial, new Resources());
+            Runtime = LiveEntityRuntimeFixture.Create(spatial, new Resources());
             var identity = new LocalPlayerIdentityState { ServerGuid = Player };
             Targets = new CombatAttackTargetSource(
                 Selection,

tests/AcDream.App.Tests/Composition/LivePresentationCompositionTests.cs

@@ -150,7 +150,7 @@ public sealed class LivePresentationCompositionTests
         Assert.Contains("d.PortalTunnelFallback.AcquirePrepared(", phase);
     }
 
-    private static LiveEntityRuntime Runtime() => new(
+    private static LiveEntityRuntime Runtime() => LiveEntityRuntimeFixture.Create(
         new GpuWorldState(),
         new DelegateLiveEntityResourceLifecycle(static _ => { }, static _ => { }));
 

tests/AcDream.App.Tests/Interaction/WorldSelectionQueryTests.cs

@@ -50,7 +50,7 @@ public sealed class WorldSelectionQueryTests
                 0x0101_FFFFu,
                 new LandBlock(),
                 Array.Empty<WorldEntity>()));
-            Runtime = new LiveEntityRuntime(spatial, new Resources());
+            Runtime = LiveEntityRuntimeFixture.Create(spatial, new Resources());
             Scene = new RetailSelectionScene(new GeometrySource(Mesh()));
             Query = new WorldSelectionQuery(
                 Runtime,

tests/AcDream.App.Tests/LiveEntityRuntimeFixture.cs

@@ -0,0 +1,50 @@
+using AcDream.App.Streaming;
+using AcDream.App.World;
+using AcDream.Runtime.Entities;
+
+namespace AcDream.App.Tests;
+
+/// <summary>
+/// Explicit isolated lifetime-group seam for App projection tests. Production
+/// composition supplies its session-owned group from GameWindow; focused tests
+/// use a fresh group per runtime so identity never leaks between fixtures.
+/// </summary>
+internal static class LiveEntityRuntimeFixture
+{
+    public static LiveEntityRuntime Create(
+        GpuWorldState spatial,
+        ILiveEntityResourceLifecycle resources,
+        uint firstLocalEntityId = RuntimeEntityDirectory.FirstLocalEntityId)
+    {
+        var lifetime = new RuntimeEntityObjectLifetime(firstLocalEntityId);
+        return new LiveEntityRuntime(spatial, resources, lifetime);
+    }
+
+    public static LiveEntityRuntime Create(
+        GpuWorldState spatial,
+        ILiveEntityResourceLifecycle resources,
+        Action<LiveEntityRecord> tearDownRuntimeComponents,
+        uint firstLocalEntityId = RuntimeEntityDirectory.FirstLocalEntityId)
+    {
+        var lifetime = new RuntimeEntityObjectLifetime(firstLocalEntityId);
+        return new LiveEntityRuntime(
+            spatial,
+            resources,
+            tearDownRuntimeComponents,
+            lifetime);
+    }
+
+    public static LiveEntityRuntime Create(
+        GpuWorldState spatial,
+        ILiveEntityResourceLifecycle resources,
+        ILiveEntityRuntimeComponentLifecycle runtimeComponentLifecycle,
+        uint firstLocalEntityId = RuntimeEntityDirectory.FirstLocalEntityId)
+    {
+        var lifetime = new RuntimeEntityObjectLifetime(firstLocalEntityId);
+        return new LiveEntityRuntime(
+            spatial,
+            resources,
+            runtimeComponentLifecycle,
+            lifetime);
+    }
+}

tests/AcDream.App.Tests/Net/LiveSessionResetPlanTests.cs

@@ -210,7 +210,7 @@ public sealed class LiveSessionResetPlanTests
             landblock,
             new LandBlock(),
             new List<WorldEntity> { staticEntity }));
-        var live = new LiveEntityRuntime(spatial, new FailingOnceResources());
+        var live = LiveEntityRuntimeFixture.Create(spatial, new FailingOnceResources());
         WorldSession.EntitySpawn spawn = Spawn(playerA, 1, 1, 0x01010001u);
         live.RegisterLiveEntity(spawn);
         live.MaterializeLiveEntity(

tests/AcDream.App.Tests/Physics/LiveEntityInboundAuthorityGateTests.cs

@@ -315,7 +315,7 @@ public sealed class LiveEntityInboundAuthorityGateTests
             accepted.VelocityAuthorityVersion));
     }
 
-    private static LiveEntityRuntime Runtime() => new(
+    private static LiveEntityRuntime Runtime() => LiveEntityRuntimeFixture.Create(
         new GpuWorldState(),
         new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
 

tests/AcDream.App.Tests/Physics/LiveEntityOrdinaryPhysicsUpdaterTests.cs

@@ -23,7 +23,7 @@ public sealed class LiveEntityOrdinaryPhysicsUpdaterTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0xA9B4FFFFu));
         spatial.AddLandblock(EmptyLandblock(0xAAB4FFFFu));
-        var live = new LiveEntityRuntime(
+        var live = LiveEntityRuntimeFixture.Create(
             spatial,
             new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
         LiveEntityRecord record = live.RegisterAndMaterializeProjection(
@@ -90,7 +90,7 @@ public sealed class LiveEntityOrdinaryPhysicsUpdaterTests
     {
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0xA9B4FFFFu));
-        var live = new LiveEntityRuntime(
+        var live = LiveEntityRuntimeFixture.Create(
             spatial,
             new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
         LiveEntityRecord record = live.RegisterAndMaterializeProjection(

tests/AcDream.App.Tests/Physics/ProjectileControllerTests.cs

@@ -1457,7 +1457,7 @@ public sealed class ProjectileControllerTests
         {
             if (loadInitialLandblock)
                 Spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-            Live = new LiveEntityRuntime(Spatial, Resources);
+            Live = LiveEntityRuntimeFixture.Create(Spatial, Resources);
             Engine = physicsEngine ?? new PhysicsEngine();
             Origin.Recenter(1, 1);
             Controller = new ProjectileController(

tests/AcDream.App.Tests/Physics/RemotePhysicsUpdaterTests.cs

@@ -692,7 +692,7 @@ public sealed class RemotePhysicsUpdaterTests
             0x0101FFFFu,
             new LandBlock(),
             Array.Empty<WorldEntity>()));
-        var live = new LiveEntityRuntime(
+        var live = LiveEntityRuntimeFixture.Create(
             spatial,
             new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
         BindHiddenRemote(live, firstGuid);
@@ -840,7 +840,7 @@ public sealed class RemotePhysicsUpdaterTests
                 0xA9B4FFFFu,
                 new LandBlock(),
                 Array.Empty<WorldEntity>()));
-            Live = new LiveEntityRuntime(
+            Live = LiveEntityRuntimeFixture.Create(
                 Spatial,
                 new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }),
                 record =>

tests/AcDream.App.Tests/Physics/RemoteTeleportControllerTests.cs

@@ -87,7 +87,7 @@ public sealed class RemoteTeleportControllerTests
         const uint destinationCell = 0xAAB40001u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0xA9B4FFFFu));
-        var live = new LiveEntityRuntime(spatial, new Resources());
+        var live = LiveEntityRuntimeFixture.Create(spatial, new Resources());
         live.RegisterLiveEntity(Spawn(guid, sourceCell));
         WorldEntity entity = live.MaterializeLiveEntity(
             guid,
@@ -228,7 +228,7 @@ public sealed class RemoteTeleportControllerTests
         const uint sourceCell = 0xA9B40039u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0xA9B4FFFFu));
-        var live = new LiveEntityRuntime(spatial, new Resources());
+        var live = LiveEntityRuntimeFixture.Create(spatial, new Resources());
         live.RegisterLiveEntity(Spawn(guid, sourceCell));
         WorldEntity entity = live.MaterializeLiveEntity(
             guid,
@@ -319,7 +319,7 @@ public sealed class RemoteTeleportControllerTests
         Vector3 sourcePosition = new(191f, 10f, 50f);
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0xA9B4FFFFu));
-        var live = new LiveEntityRuntime(spatial, new Resources());
+        var live = LiveEntityRuntimeFixture.Create(spatial, new Resources());
         live.RegisterLiveEntity(Spawn(guid, sourceCell));
         WorldEntity entity = live.MaterializeLiveEntity(
             guid,
@@ -1101,7 +1101,7 @@ public sealed class RemoteTeleportControllerTests
             ]));
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0xA9B4FFFFu));
-        var live = new LiveEntityRuntime(spatial, resources);
+        var live = LiveEntityRuntimeFixture.Create(spatial, resources);
         live.RegisterLiveEntity(Spawn(guid, sourceCell));
         WorldEntity entity = live.MaterializeLiveEntity(
             guid,
@@ -1179,7 +1179,7 @@ public sealed class RemoteTeleportControllerTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0xA9B4FFFFu));
         spatial.AddLandblock(EmptyLandblock(0xAAB4FFFFu));
-        var live = new LiveEntityRuntime(spatial, new Resources());
+        var live = LiveEntityRuntimeFixture.Create(spatial, new Resources());
         live.RegisterLiveEntity(Spawn(guid, sourceCell));
         WorldEntity entity = live.MaterializeLiveEntity(
             guid,
@@ -1383,7 +1383,7 @@ public sealed class RemoteTeleportControllerTests
         internal RollbackFixture(bool celllessSource = false)
         {
             Spatial.AddLandblock(EmptyLandblock(SourceLandblock));
-            Live = new LiveEntityRuntime(Spatial, new Resources());
+            Live = LiveEntityRuntimeFixture.Create(Spatial, new Resources());
             Live.RegisterLiveEntity(Spawn(Guid, SourceCell));
             Entity = Live.MaterializeLiveEntity(
                 Guid,

tests/AcDream.App.Tests/Rendering/EquippedChildProjectionWithdrawalTests.cs

@@ -1161,7 +1161,7 @@ public sealed class EquippedChildProjectionWithdrawalTests
                 (Cell & 0xFFFF0000u) | 0xFFFFu,
                 new LandBlock(),
                 Array.Empty<WorldEntity>()));
-            Live = new LiveEntityRuntime(
+            Live = LiveEntityRuntimeFixture.Create(
                 Spatial,
                 new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }),
                 _lifecycle);

tests/AcDream.App.Tests/Rendering/LiveAppearanceAnimationTests.cs

@@ -17,7 +17,7 @@ public sealed class LiveAppearanceAnimationTests
     public void Capture_UsesCanonicalRecordEntityAndAnimationOwner()
     {
         const uint guid = 0x70000002u;
-        var runtime = new AcDream.App.World.LiveEntityRuntime(
+        var runtime = LiveEntityRuntimeFixture.Create(
             new AcDream.App.Streaming.GpuWorldState(),
             new AcDream.App.World.DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
         var spawn = new AcDream.Core.Net.WorldSession.EntitySpawn(
@@ -118,7 +118,7 @@ public sealed class LiveAppearanceAnimationTests
             0x0101FFFFu,
             new LandBlock(),
             Array.Empty<WorldEntity>()));
-        var runtime = new LiveEntityRuntime(
+        var runtime = LiveEntityRuntimeFixture.Create(
             spatial,
             new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
         WorldSession.EntitySpawn first = Spawn(guid, cell, instance: 1);

tests/AcDream.App.Tests/Rendering/LiveEntityAnimationPresenterTests.cs

@@ -440,7 +440,7 @@ public sealed class LiveEntityAnimationPresenterTests
             0x0101FFFFu,
             new LandBlock(),
             Array.Empty<WorldEntity>()));
-        var live = new LiveEntityRuntime(
+        var live = LiveEntityRuntimeFixture.Create(
             spatial,
             new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
         return Add(live, guid, partCount, scale, withSequencer);

tests/AcDream.App.Tests/Rendering/LiveEntityAnimationSchedulerTests.cs

@@ -679,7 +679,7 @@ public sealed class LiveEntityAnimationSchedulerTests
             0x0101FFFFu,
             new LandBlock(),
             Array.Empty<WorldEntity>()));
-        var live = new LiveEntityRuntime(
+        var live = LiveEntityRuntimeFixture.Create(
             spatial,
             new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
         LiveEntityRecord record = live.RegisterAndMaterializeProjection(
@@ -800,7 +800,7 @@ public sealed class LiveEntityAnimationSchedulerTests
             0x0101FFFFu,
             new LandBlock(),
             Array.Empty<WorldEntity>()));
-        var live = new LiveEntityRuntime(
+        var live = LiveEntityRuntimeFixture.Create(
             spatial,
             new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
         LiveEntityRecord record = live.RegisterAndMaterializeProjection(

tests/AcDream.App.Tests/Rendering/LiveEntityCreateSupersessionRecoveryTests.cs

@@ -286,7 +286,7 @@ public sealed class LiveEntityCreateSupersessionRecoveryTests
             0x0101FFFFu,
             new DatReaderWriter.DBObjs.LandBlock(),
             Array.Empty<WorldEntity>()));
-        return new LiveEntityRuntime(
+        return LiveEntityRuntimeFixture.Create(
             spatial,
             resources,
             new DelegateLiveEntityRuntimeComponentLifecycle(_ => { }));

tests/AcDream.App.Tests/Rendering/LiveRenderProjectionJournalTests.cs

@@ -357,7 +357,7 @@ public sealed class LiveRenderProjectionJournalTests
         var resources = new DelegateLiveEntityResourceLifecycle(
             static _ => { },
             entity => sink?.OnResourceUnregister(entity));
-        var runtime = new LiveEntityRuntime(state, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(state, resources);
         var journal = new RenderProjectionJournal(
             RenderSceneGeneration.FromRaw(1));
         var projections = new LiveRenderProjectionJournal(

tests/AcDream.App.Tests/Rendering/Vfx/EntityEffectControllerTests.cs

@@ -55,7 +55,7 @@ public sealed class EntityEffectControllerTests
                 0x0101FFFFu,
                 new LandBlock(),
                 Array.Empty<WorldEntity>()));
-            Runtime = new LiveEntityRuntime(
+            Runtime = LiveEntityRuntimeFixture.Create(
                 Spatial,
                 new NoopResources(),
                 record => _controller?.OnLiveEntityUnregistered(record));

tests/AcDream.App.Tests/Rendering/Vfx/LiveEntityLightControllerTests.cs

@@ -151,7 +151,7 @@ public sealed class LiveEntityLightControllerTests
                 0x0101FFFFu,
                 new LandBlock(),
                 Array.Empty<WorldEntity>()));
-            Runtime = new LiveEntityRuntime(Spatial, new NoopResources(), _ => { });
+            Runtime = LiveEntityRuntimeFixture.Create(Spatial, new NoopResources(), _ => { });
             Sink = new LightingHookSink(Lights, Poses);
             Controller = new LiveEntityLightController(
                 Runtime,

tests/AcDream.App.Tests/Runtime/CurrentGameRuntimeAdapterTests.cs

@@ -185,7 +185,7 @@ public sealed class CurrentGameRuntimeAdapterTests
         public Harness()
         {
             Identity = new LocalPlayerIdentityState();
-            Entities = new LiveEntityRuntime(
+            Entities = LiveEntityRuntimeFixture.Create(
                 new GpuWorldState(),
                 new NoopEntityResources());
             Objects = new ClientObjectTable();

tests/AcDream.App.Tests/Streaming/GpuWorldStateVisibilityTests.cs

@@ -579,7 +579,7 @@ public sealed class GpuWorldStateVisibilityTests
         const uint landblock = 0x0101FFFFu;
         const uint cell = 0x01010001u;
         var state = new GpuWorldState();
-        var runtime = new LiveEntityRuntime(
+        var runtime = LiveEntityRuntimeFixture.Create(
             state,
             new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
         WorldSession.EntitySpawn first = Spawn(0x70000011u, cell);
@@ -624,7 +624,7 @@ public sealed class GpuWorldStateVisibilityTests
             landblock,
             new LandBlock(),
             Array.Empty<WorldEntity>()));
-        var runtime = new LiveEntityRuntime(
+        var runtime = LiveEntityRuntimeFixture.Create(
             state,
             new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
         WorldSession.EntitySpawn spawn = Spawn(guid, cell);

tests/AcDream.App.Tests/Streaming/LocalPlayerTeleportControllerTests.cs

@@ -396,7 +396,7 @@ public sealed class LocalPlayerTeleportControllerTests
             0x2021FFFFu,
             new DatReaderWriter.DBObjs.LandBlock(),
             Array.Empty<WorldEntity>()));
-        var runtime = new LiveEntityRuntime(world, new NullResources());
+        var runtime = LiveEntityRuntimeFixture.Create(world, new NullResources());
         runtime.RegisterLiveEntity(Spawn(guid, cell));
         WorldEntity entity = runtime.MaterializeLiveEntity(
             guid,
@@ -479,7 +479,7 @@ public sealed class LocalPlayerTeleportControllerTests
             destinationCell & 0xFFFF0000u | 0xFFFFu,
             new DatReaderWriter.DBObjs.LandBlock(),
             Array.Empty<WorldEntity>()));
-        var runtime = new LiveEntityRuntime(world, new NullResources());
+        var runtime = LiveEntityRuntimeFixture.Create(world, new NullResources());
         runtime.RegisterLiveEntity(Spawn(guid, sourceCell));
         WorldEntity entity = runtime.MaterializeLiveEntity(
             guid,

tests/AcDream.App.Tests/Streaming/StreamingFrameControllerTests.cs

@@ -506,7 +506,9 @@ public sealed class StreamingFrameControllerTests
     }
 
     private static LiveEntityRuntime Runtime(GpuWorldState state) =>
-        new(state, new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
+        LiveEntityRuntimeFixture.Create(
+            state,
+            new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
 
     private static LoadedLandblock EmptyLandblock(uint landblock) =>
         new(landblock, new LandBlock(), Array.Empty<WorldEntity>());

tests/AcDream.App.Tests/World/DeferredLiveEntityRuntimeComponentLifecycleTests.cs

@@ -110,7 +110,7 @@ public sealed class DeferredLiveEntityRuntimeComponentLifecycleTests
     {
         const uint guid = 0x70000002u;
         var bridge = new DeferredLiveEntityRuntimeComponentLifecycle();
-        var runtime = new LiveEntityRuntime(
+        var runtime = LiveEntityRuntimeFixture.Create(
             new GpuWorldState(),
             new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }),
             bridge);
@@ -136,7 +136,7 @@ public sealed class DeferredLiveEntityRuntimeComponentLifecycleTests
 
     private static LiveEntityRecord CreateRecord()
     {
-        var runtime = new LiveEntityRuntime(
+        var runtime = LiveEntityRuntimeFixture.Create(
             new GpuWorldState(),
             new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
         return runtime.RegisterAndMaterializeProjection(

tests/AcDream.App.Tests/World/LiveEntityHydrationControllerTests.cs

@@ -1828,7 +1828,8 @@ public sealed class LiveEntityHydrationControllerTests
     private sealed class Fixture : IDisposable
     {
         public readonly List<string> Operations = [];
-        public readonly ClientObjectTable Objects = new();
+        public readonly RuntimeEntityObjectLifetime EntityObjects = new();
+        public ClientObjectTable Objects => EntityObjects.Objects;
         public readonly RecordingResources Resources;
         public readonly LiveEntityRuntime Runtime;
         public readonly RecordingMaterializer Materializer;
@@ -1861,7 +1862,8 @@ public sealed class LiveEntityHydrationControllerTests
             Runtime = new LiveEntityRuntime(
                 spatial,
                 Resources,
-                Teardown);
+                Teardown,
+                EntityObjects);
             Materializer = new RecordingMaterializer(Runtime, Operations);
             Relationships = new RecordingRelationships(Operations);
             Ready = new RecordingReadyPublisher(Operations);
@@ -1887,13 +1889,13 @@ public sealed class LiveEntityHydrationControllerTests
             };
             var deletion = new LiveEntityDeletionController(
                 Runtime,
-                Objects,
+                EntityObjects,
                 Teardown,
                 identity,
                 Dormant);
             Controller = new LiveEntityHydrationController(
                 Runtime,
-                Objects,
+                EntityObjects,
                 new object(),
                 Materializer,
                 Relationships,

tests/AcDream.App.Tests/World/LiveEntityLifecycleStressTests.cs

@@ -328,7 +328,7 @@ public sealed class LiveEntityLifecycleStressTests
                 randomUnit: () => 0.5,
                 canAdvanceOwner: ownerId => _effects?.CanAdvanceOwner(ownerId) ?? true);
 
-            Runtime = new LiveEntityRuntime(
+            Runtime = LiveEntityRuntimeFixture.Create(
                 Spatial,
                 new DelegateLiveEntityResourceLifecycle(
                     entity =>
@@ -489,7 +489,7 @@ public sealed class LiveEntityLifecycleStressTests
             EntityEffectController? effects = null;
             LiveEntityPresentationController? presentation = null;
             RemoteTeleportController? teleport = null;
-            Runtime = new LiveEntityRuntime(
+            Runtime = LiveEntityRuntimeFixture.Create(
                 Spatial,
                 new DelegateLiveEntityResourceLifecycle(
                     entity =>

tests/AcDream.App.Tests/World/LiveEntityPhysicsHostOwnershipTests.cs

@@ -630,10 +630,10 @@ public sealed class LiveEntityPhysicsHostOwnershipTests
 
     private static LiveEntityRuntime Runtime(Action<LiveEntityRecord>? teardown = null) =>
         teardown is null
-            ? new LiveEntityRuntime(
+            ? LiveEntityRuntimeFixture.Create(
                 new GpuWorldState(),
                 new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }))
-            : new LiveEntityRuntime(
+            : LiveEntityRuntimeFixture.Create(
                 new GpuWorldState(),
                 new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }),
                 teardown);

tests/AcDream.App.Tests/World/LiveEntityPresentationControllerTests.cs

@@ -426,7 +426,7 @@ public sealed class LiveEntityPresentationControllerTests
         const uint pendingCell = 0x02020001u;
         var spatial = new GpuWorldState();
         var shadows = new ShadowObjectRegistry();
-        var runtime = new LiveEntityRuntime(
+        var runtime = LiveEntityRuntimeFixture.Create(
             spatial,
             new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
         runtime.RegisterLiveEntity(Fixture.Spawn(
@@ -487,7 +487,7 @@ public sealed class LiveEntityPresentationControllerTests
         const uint pendingCell = 0x02020001u;
         var spatial = new GpuWorldState();
         var shadows = new ShadowObjectRegistry();
-        var runtime = new LiveEntityRuntime(
+        var runtime = LiveEntityRuntimeFixture.Create(
             spatial,
             new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
         runtime.RegisterLiveEntity(Fixture.Spawn(
@@ -667,7 +667,7 @@ public sealed class LiveEntityPresentationControllerTests
                 0x0101FFFFu,
                 new LandBlock(),
                 Array.Empty<WorldEntity>()));
-            Runtime = new LiveEntityRuntime(
+            Runtime = LiveEntityRuntimeFixture.Create(
                 Spatial,
                 new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
             WorldSession.EntitySpawn spawn = Spawn(initialState);

tests/AcDream.App.Tests/World/LiveEntityProjectionWithdrawalControllerTests.cs

@@ -196,7 +196,7 @@ public sealed class LiveEntityProjectionWithdrawalControllerTests
                 new LandBlock(),
                 Array.Empty<WorldEntity>()));
             var lifecycle = new DeferredLiveEntityRuntimeComponentLifecycle();
-            Live = new LiveEntityRuntime(
+            Live = LiveEntityRuntimeFixture.Create(
                 Spatial,
                 new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }),
                 lifecycle);

tests/AcDream.App.Tests/World/LiveEntityRuntimeTests.cs

@@ -22,7 +22,7 @@ public sealed class LiveEntityRuntimeTests
     public void RuntimeSlot_BindsExactlyOnceWithoutOwningEntityState()
     {
         var spatial = new GpuWorldState();
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         var slot = new LiveEntityRuntimeSlot();
 
         Assert.Null(slot.Current);
@@ -176,7 +176,7 @@ public sealed class LiveEntityRuntimeTests
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         spatial.AddLandblock(EmptyLandblock(0x0102FFFFu));
         var resources = new RecordingResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         WorldSession.EntitySpawn spawn = Spawn(0x70000001u, 1, 1, 0x01010001u);
 
         LiveEntityRegistrationResult registered = runtime.RegisterLiveEntity(spawn);
@@ -213,7 +213,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000071u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         WorldSession.EntitySpawn spawn = Spawn(
             guid,
             instance: 1,
@@ -325,7 +325,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000074u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(
             guid,
             instance: 1,
@@ -417,7 +417,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000070u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         WorldSession.EntitySpawn spawn = Spawn(guid, 1, 1, 0x01010001u);
         runtime.RegisterLiveEntity(spawn);
         WorldEntity entity = runtime.MaterializeLiveEntity(
@@ -476,7 +476,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000071u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         WorldEntity entity = runtime.MaterializeLiveEntity(
             guid,
@@ -513,7 +513,7 @@ public sealed class LiveEntityRuntimeTests
         const uint secondGuid = 0x70000074u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         foreach (uint guid in new[] { firstGuid, secondGuid })
         {
             runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
@@ -545,7 +545,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000075u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         WorldEntity entity = runtime.MaterializeLiveEntity(
             guid,
@@ -580,7 +580,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000072u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         WorldEntity oldEntity = runtime.MaterializeLiveEntity(
             guid,
@@ -617,7 +617,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000073u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         runtime.MaterializeLiveEntity(
             guid,
@@ -672,7 +672,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         spatial.AddLandblock(EmptyLandblock(0x0102FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         WorldSession.EntitySpawn spawn = Spawn(guid, 6, 1, 0x01010001u);
         LiveEntityRegistrationResult registration =
             runtime.RegisterLiveEntity(spawn);
@@ -702,7 +702,7 @@ public sealed class LiveEntityRuntimeTests
     {
         const uint parentGuid = 0x70000020u;
         const uint childGuid = 0x70000021u;
-        var runtime = new LiveEntityRuntime(new GpuWorldState(), new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(new GpuWorldState(), new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(parentGuid, 9, 1, 0x01010001u));
         runtime.ParentAttachments.Enqueue(new ParentEvent.Parsed(
             parentGuid, childGuid, 1, 2, 9, 5));
@@ -725,7 +725,7 @@ public sealed class LiveEntityRuntimeTests
     {
         const uint parentGuid = 0x70000022u;
         const uint childGuid = 0x70000023u;
-        var runtime = new LiveEntityRuntime(new GpuWorldState(), new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(new GpuWorldState(), new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(childGuid, 3, 4, 0x01010001u));
         runtime.ParentAttachments.AcceptCreateObjectRelation(new ParentAttachmentRelation(
             parentGuid, childGuid, 1, 2, 9, 4));
@@ -743,7 +743,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new RecordingResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         WorldSession.EntitySpawn first = Spawn(0x70000002u, 4, 10, 0x01010001u);
         runtime.RegisterLiveEntity(first);
         WorldEntity original = runtime.MaterializeLiveEntity(
@@ -771,7 +771,7 @@ public sealed class LiveEntityRuntimeTests
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new RecordingResources();
         int runtimeTearDowns = 0;
-        var runtime = new LiveEntityRuntime(
+        var runtime = LiveEntityRuntimeFixture.Create(
             spatial,
             resources,
             _ => runtimeTearDowns++);
@@ -803,7 +803,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new RecordingResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         WorldSession.EntitySpawn spawn = Spawn(0x70000004u, 2, 3, 0x01010001u);
         runtime.RegisterLiveEntity(spawn);
         WorldEntity entity = runtime.MaterializeLiveEntity(
@@ -833,7 +833,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new RecordingResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         const uint guid = 0x70000005u;
         runtime.RegisterLiveEntity(Spawn(guid, 3, 1, 0x01010001u));
         WorldEntity first = runtime.MaterializeLiveEntity(
@@ -863,7 +863,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new RecordingResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         WorldSession.EntitySpawn spawn = Spawn(0x70000006u, 3, 1, 0x01010001u);
         runtime.RegisterLiveEntity(spawn);
 
@@ -900,7 +900,7 @@ public sealed class LiveEntityRuntimeTests
     {
         var spatial = new GpuWorldState();
         var resources = new RecordingResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         WorldSession.EntitySpawn spawn = Spawn(0x70000007u, 1, 1, 0x01020001u);
         runtime.RegisterLiveEntity(spawn);
         WorldEntity entity = runtime.MaterializeLiveEntity(
@@ -929,7 +929,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000025u;
         var spatial = new GpuWorldState();
         var resources = new RecordingResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         WorldSession.EntitySpawn spawn = Spawn(guid, 2, 1, 0x01010001u);
         runtime.RegisterLiveEntity(spawn);
         WorldEntity entity = runtime.MaterializeLiveEntity(
@@ -983,7 +983,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new RecordingResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         WorldSession.EntitySpawn spawn = Spawn(guid, 4, 10, 0x01010001u);
         runtime.RegisterLiveEntity(spawn);
         WorldEntity entity = runtime.MaterializeLiveEntity(
@@ -1063,7 +1063,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000027u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         WorldSession.EntitySpawn spawn = Spawn(guid, 1, 1, 0x01010001u);
         runtime.RegisterLiveEntity(spawn);
         runtime.MaterializeLiveEntity(
@@ -1104,7 +1104,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         spatial.AddLandblock(EmptyLandblock(0x0102FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         WorldSession.EntitySpawn spawn = Spawn(guid, 1, 1, 0x01010001u);
         LiveEntityRecord record = RegisterProjection(runtime, spawn);
         RetailObjectQuantumClock clock = record.ObjectClock;
@@ -1143,7 +1143,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000049u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         WorldSession.EntitySpawn spawn = Spawn(
             guid,
             1,
@@ -1166,7 +1166,7 @@ public sealed class LiveEntityRuntimeTests
         const uint staticGuid = 0x70000051u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
 
         LiveEntityRecord ordinary = RegisterProjection(
             runtime,
@@ -1204,7 +1204,7 @@ public sealed class LiveEntityRuntimeTests
         const uint staticGuid = 0x70000054u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
 
         LiveEntityRecord ordinary = RegisterProjection(
             runtime,
@@ -1279,7 +1279,7 @@ public sealed class LiveEntityRuntimeTests
     {
         const uint parentGuid = 0x50000010u;
         const uint childGuid = 0x70000055u;
-        var runtime = new LiveEntityRuntime(new GpuWorldState(), new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(new GpuWorldState(), new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(parentGuid, 1, 1, 0x01010001u));
         LiveEntityRecord child = RegisterProjection(
             runtime,
@@ -1314,7 +1314,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000048u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         WorldSession.EntitySpawn firstSpawn = Spawn(guid, 1, 1, 0x01010001u);
         LiveEntityRecord first = RegisterProjection(runtime, firstSpawn);
         RetailObjectQuantumClock firstClock = first.ObjectClock;
@@ -1341,7 +1341,7 @@ public sealed class LiveEntityRuntimeTests
     {
         const uint stateBeforeBindGuid = 0x70000037u;
         const uint bindBeforeStateGuid = 0x70000038u;
-        var runtime = new LiveEntityRuntime(new GpuWorldState(), new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(new GpuWorldState(), new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(stateBeforeBindGuid, 1, 1, 0x01010001u));
         runtime.RegisterLiveEntity(Spawn(bindBeforeStateGuid, 1, 1, 0x01010001u));
 
@@ -1381,7 +1381,7 @@ public sealed class LiveEntityRuntimeTests
     public void ParentDrivenChildNoDrawKeepsBoundBodyInCanonicalState()
     {
         const uint guid = 0x70000039u;
-        var runtime = new LiveEntityRuntime(new GpuWorldState(), new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(new GpuWorldState(), new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         runtime.MaterializeLiveEntity(
             guid,
@@ -1401,7 +1401,7 @@ public sealed class LiveEntityRuntimeTests
     public void InitiallyVisibleCreate_DoesNotManufactureUnHideTransition()
     {
         const uint guid = 0x70000040u;
-        var runtime = new LiveEntityRuntime(new GpuWorldState(), new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(new GpuWorldState(), new RecordingResources());
 
         LiveEntityRecord record = RegisterProjection(
             runtime,
@@ -1418,7 +1418,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000041u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(
             guid,
             1,
@@ -1448,7 +1448,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000042u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         WorldEntity entity = runtime.MaterializeLiveEntity(
             guid,
@@ -1486,7 +1486,7 @@ public sealed class LiveEntityRuntimeTests
     public void PositionAfterPickup_RequiresTeleportHookEvenWithEqualTeleportStamp()
     {
         const uint guid = 0x70000043u;
-        var runtime = new LiveEntityRuntime(new GpuWorldState(), new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(new GpuWorldState(), new RecordingResources());
         WorldSession.EntitySpawn spawn = Spawn(guid, 1, 1, 0x01010001u);
         runtime.RegisterLiveEntity(spawn);
         Assert.True(runtime.TryApplyPickup(
@@ -1524,7 +1524,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000044u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         WorldSession.EntitySpawn spawn = Spawn(guid, 1, 1, 0x01010001u);
         runtime.RegisterLiveEntity(spawn);
         runtime.MaterializeLiveEntity(
@@ -1563,7 +1563,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new RecordingResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         WorldSession.EntitySpawn spawn = Spawn(0x70000024u, 1, 1, 0x01010001u);
         runtime.RegisterLiveEntity(spawn);
         WorldEntity entity = runtime.MaterializeLiveEntity(
@@ -1593,7 +1593,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new RecordingResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         WorldSession.EntitySpawn spawn = Spawn(0x70000009u, 1, 1, 0x01010001u);
         runtime.RegisterLiveEntity(spawn);
         WorldEntity entity = runtime.MaterializeLiveEntity(
@@ -1620,7 +1620,7 @@ public sealed class LiveEntityRuntimeTests
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new RecordingResources();
         int runtimeTearDowns = 0;
-        var runtime = new LiveEntityRuntime(spatial, resources, _ => runtimeTearDowns++);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources, _ => runtimeTearDowns++);
         WorldSession.EntitySpawn spawn = Spawn(0x70000008u, 1, 1, 0x01010001u);
         runtime.RegisterLiveEntity(spawn);
         runtime.MaterializeLiveEntity(
@@ -1645,7 +1645,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new FailingRegisterResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         WorldSession.EntitySpawn spawn = Spawn(0x7000000Au, 1, 1, 0x01010001u);
         runtime.RegisterLiveEntity(spawn);
 
@@ -1671,7 +1671,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new FailingRegisterAndRollbackOnceResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
 
         Assert.Throws<AggregateException>(() => runtime.MaterializeLiveEntity(
@@ -1709,7 +1709,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new FailingRegisterAndRollbackOnceResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         Assert.Throws<AggregateException>(() => runtime.MaterializeLiveEntity(
             guid,
@@ -1736,7 +1736,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new FailingRegisterAndRollbackOnceResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         WorldSession.EntitySpawn spawn = Spawn(guid, 1, 1, 0x01010001u);
         runtime.RegisterLiveEntity(spawn);
         Assert.Throws<AggregateException>(() => runtime.MaterializeLiveEntity(
@@ -1764,7 +1764,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new FailingUnregisterResources(0x7000000Bu);
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         foreach (uint guid in new[] { 0x7000000Bu, 0x7000000Cu })
         {
             WorldSession.EntitySpawn spawn = Spawn(guid, 1, 1, 0x01010001u);
@@ -1792,7 +1792,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new FailingOnceUnregisterResources(guid);
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         WorldSession.EntitySpawn spawn = Spawn(guid, 1, 1, 0x01010001u);
         runtime.RegisterLiveEntity(spawn);
         runtime.MaterializeLiveEntity(guid, 0x01010001u, id => Entity(id, guid));
@@ -1819,7 +1819,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new FailingOnceUnregisterResources(guid);
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         WorldSession.EntitySpawn spawn = Spawn(guid, 1, 1, 0x01010001u);
         runtime.RegisterLiveEntity(spawn);
         runtime.MaterializeLiveEntity(guid, 0x01010001u, id => Entity(id, guid));
@@ -1852,7 +1852,7 @@ public sealed class LiveEntityRuntimeTests
                 if (!adapter.OnRemove(entity))
                     throw new InvalidOperationException("presentation owner was not registered");
             });
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.ProjectionVisibilityChanged += (record, visible) =>
         {
             if (record.WorldEntity is { } entity)
@@ -1887,7 +1887,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new FailingUnregisterResources(guid);
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         WorldSession.EntitySpawn first = Spawn(guid, 1, 1, 0x01010001u);
         runtime.RegisterLiveEntity(first);
         runtime.MaterializeLiveEntity(
@@ -1918,7 +1918,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         spatial.AddLandblock(EmptyLandblock(0x0102FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010022u));
         runtime.MaterializeLiveEntity(guid, 0x01010022u, id => Entity(id, guid));
 
@@ -1940,7 +1940,7 @@ public sealed class LiveEntityRuntimeTests
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         spatial.AddLandblock(EmptyLandblock(0x0102FFFFu));
         var resources = new RecordingResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         WorldEntity attached = runtime.MaterializeLiveEntity(
             guid,
@@ -1965,7 +1965,7 @@ public sealed class LiveEntityRuntimeTests
     {
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(
+        var runtime = LiveEntityRuntimeFixture.Create(
             spatial,
             new RecordingResources(),
             firstLocalEntityId: LiveEntityRuntime.LastLiveEntityId);
@@ -1984,7 +1984,7 @@ public sealed class LiveEntityRuntimeTests
         Assert.NotEqual(0u, secondEntity.Id);
         Assert.True(runtime.TryGetLocalEntityId(second.Guid, out uint resolved));
         Assert.Equal(secondEntity.Id, resolved);
-        Assert.Throws<ArgumentOutOfRangeException>(() => new LiveEntityRuntime(
+        Assert.Throws<ArgumentOutOfRangeException>(() => LiveEntityRuntimeFixture.Create(
             new GpuWorldState(),
             new RecordingResources(),
             firstLocalEntityId: uint.MaxValue));
@@ -1996,7 +1996,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x7000002Au;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         runtime.MaterializeLiveEntity(
             guid,
@@ -2022,7 +2022,7 @@ public sealed class LiveEntityRuntimeTests
     public void SessionClear_ForgetsPersistentClassificationWithoutMaterializedRecord()
     {
         var spatial = new GpuWorldState();
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         spatial.MarkPersistent(0x7000002Bu);
 
         runtime.Clear();
@@ -2037,7 +2037,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x7000002Du;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         runtime.MaterializeLiveEntity(
             guid,
@@ -2067,7 +2067,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000040u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         WorldEntity entity = runtime.MaterializeLiveEntity(
             guid,
@@ -2096,7 +2096,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000041u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         runtime.MaterializeLiveEntity(
             guid,
@@ -2127,7 +2127,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000044u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         runtime.MaterializeLiveEntity(guid, 0x01010001u, id => Entity(id, guid));
         bool replaced = false;
@@ -2161,7 +2161,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000045u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         WorldEntity original = runtime.MaterializeLiveEntity(
             guid,
@@ -2200,7 +2200,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x70000046u;
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         runtime.MaterializeLiveEntity(guid, 0x01010001u, id => Entity(id, guid));
         bool reprojected = false;
@@ -2228,7 +2228,7 @@ public sealed class LiveEntityRuntimeTests
     {
         const uint guid = 0x70000075u;
         var spatial = new GpuWorldState();
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         WorldEntity pending = runtime.MaterializeLiveEntity(
             guid,
@@ -2277,7 +2277,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new FailingOnceUnregisterResources(guid);
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         WorldEntity? replacementEntity = null;
         bool replaced = false;
@@ -2318,7 +2318,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         spatial.AddLandblock(EmptyLandblock(0x0303FFFFu));
-        var runtime = new LiveEntityRuntime(spatial, new RecordingResources());
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, new RecordingResources());
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         WorldEntity original = runtime.MaterializeLiveEntity(
             guid,
@@ -2352,7 +2352,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x7000002Cu;
         var spatial = new GpuWorldState();
         var resources = new RecordingResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         runtime.MaterializeLiveEntity(
             guid,
@@ -2394,7 +2394,7 @@ public sealed class LiveEntityRuntimeTests
         const uint guid = 0x7000002Eu;
         var spatial = new GpuWorldState();
         var resources = new RecordingResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         runtime.MaterializeLiveEntity(
             guid,
@@ -2434,7 +2434,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new RecordingResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         WorldEntity old = runtime.MaterializeLiveEntity(
             guid,
@@ -2477,7 +2477,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new CallbackResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         runtime.MaterializeLiveEntity(guid, 0x01010001u, id => Entity(id, guid));
         resources.OnUnregister = _ =>
@@ -2508,7 +2508,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new CallbackResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         runtime.MaterializeLiveEntity(guid, 0x01010001u, id => Entity(id, guid));
         resources.OnUnregister = _ =>
@@ -2538,7 +2538,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new CallbackResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         runtime.MaterializeLiveEntity(guid, 0x01010001u, id => Entity(id, guid));
         resources.OnUnregister = _ =>
@@ -2568,7 +2568,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new CallbackResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         runtime.MaterializeLiveEntity(guid, 0x01010001u, id => Entity(id, guid));
         resources.OnUnregister = _ =>
@@ -2600,7 +2600,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new CallbackResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         runtime.MaterializeLiveEntity(guid, 0x01010001u, id => Entity(id, guid));
         resources.OnUnregister = _ =>
@@ -2632,7 +2632,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new CallbackResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         runtime.MaterializeLiveEntity(guid, 0x01010001u, id => Entity(id, guid));
         resources.OnUnregister = _ =>
@@ -2660,7 +2660,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new CallbackResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         resources.OnRegister = _ =>
             runtime.RegisterLiveEntity(Spawn(guid, 2, 1, 0x01010001u));
@@ -2686,7 +2686,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new CallbackResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.RegisterLiveEntity(Spawn(guid, 1, 1, 0x01010001u));
         resources.OnRegister = _ => runtime.Clear();
 
@@ -2711,7 +2711,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new CallbackResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.RegisterLiveEntity(Spawn(firstGuid, 1, 1, 0x01010001u));
         runtime.RegisterLiveEntity(Spawn(secondGuid, 1, 1, 0x01010001u));
         runtime.MaterializeLiveEntity(firstGuid, 0x01010001u, id => Entity(id, firstGuid));
@@ -2744,7 +2744,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new CallbackResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         runtime.RegisterLiveEntity(Spawn(oldGuid, 1, 1, 0x01010001u));
         runtime.MaterializeLiveEntity(oldGuid, 0x01010001u, id => Entity(id, oldGuid));
         resources.OnUnregister = _ =>
@@ -2785,7 +2785,7 @@ public sealed class LiveEntityRuntimeTests
         var spatial = new GpuWorldState();
         spatial.AddLandblock(EmptyLandblock(0x0101FFFFu));
         var resources = new RecordingResources();
-        var runtime = new LiveEntityRuntime(spatial, resources);
+        var runtime = LiveEntityRuntimeFixture.Create(spatial, resources);
         WorldSession.EntitySpawn spawn = Spawn(0x7000000Du, 4, 1, 0x01010001u);
         runtime.RegisterLiveEntity(spawn);
         runtime.MaterializeLiveEntity(

tests/AcDream.App.Tests/World/RuntimeEntityOwnershipTests.cs

@@ -13,8 +13,19 @@ namespace AcDream.App.Tests.World;
 public sealed class RuntimeEntityOwnershipTests
 {
     [Fact]
-    public void LiveEntityRuntime_ComposesCanonicalRuntimeDirectory()
+    public void LiveEntityRuntime_BorrowsCanonicalRuntimeDirectory()
     {
+        var lifetime = new RuntimeEntityObjectLifetime();
+        var runtime = new LiveEntityRuntime(
+            new GpuWorldState(),
+            new DelegateLiveEntityResourceLifecycle(
+                static _ => { },
+                static _ => { }),
+            lifetime);
+        FieldInfo owner = typeof(LiveEntityRuntime).GetField(
+            "_entityObjects",
+            BindingFlags.Instance | BindingFlags.NonPublic)
+            ?? throw new InvalidOperationException("Missing Runtime lifetime root.");
         FieldInfo directory = typeof(LiveEntityRuntime).GetField(
             "_directory",
             BindingFlags.Instance | BindingFlags.NonPublic)
@@ -25,9 +36,62 @@ public sealed class RuntimeEntityOwnershipTests
             ?? throw new InvalidOperationException("Missing App projection sidecar store.");
 
         Assert.Equal(typeof(RuntimeEntityDirectory), directory.FieldType);
+        Assert.Same(lifetime, owner.GetValue(runtime));
+        Assert.Same(lifetime.Entities, directory.GetValue(runtime));
         Assert.Equal(typeof(LiveEntityProjectionStore), sidecars.FieldType);
     }
 
+    [Fact]
+    public void ProductionComposition_HasOneRuntimeEntityObjectConstructionRoot()
+    {
+        string root = FindRepositoryRoot();
+        string appRoot = Path.Combine(root, "src", "AcDream.App");
+        string runtimeRoot = Path.Combine(root, "src", "AcDream.Runtime");
+        string[] appSources = Directory.GetFiles(
+            appRoot,
+            "*.cs",
+            SearchOption.AllDirectories);
+        string[] runtimeSources = Directory.GetFiles(
+            runtimeRoot,
+            "*.cs",
+            SearchOption.AllDirectories);
+
+        string[] appObjectAllocators = appSources
+            .Where(path => !path.Contains(
+                $"{Path.DirectorySeparatorChar}Studio{Path.DirectorySeparatorChar}",
+                StringComparison.OrdinalIgnoreCase))
+            .Where(path => File.ReadAllText(path).Contains(
+                "new ClientObjectTable",
+                StringComparison.Ordinal))
+            .ToArray();
+        string[] appDirectoryAllocators = appSources
+            .Where(path => File.ReadAllText(path).Contains(
+                "new RuntimeEntityDirectory",
+                StringComparison.Ordinal))
+            .ToArray();
+        string[] runtimeObjectAllocators = runtimeSources
+            .Where(path => File.ReadAllText(path).Contains(
+                "new ClientObjectTable",
+                StringComparison.Ordinal))
+            .Select(path => Path.GetFileName(path)!)
+            .ToArray();
+        string[] runtimeDirectoryAllocators = runtimeSources
+            .Where(path => File.ReadAllText(path).Contains(
+                "new RuntimeEntityDirectory",
+                StringComparison.Ordinal))
+            .Select(path => Path.GetFileName(path)!)
+            .ToArray();
+
+        Assert.Empty(appObjectAllocators);
+        Assert.Empty(appDirectoryAllocators);
+        Assert.Equal(
+            ["RuntimeEntityObjectLifetime.cs"],
+            runtimeObjectAllocators);
+        Assert.Equal(
+            ["RuntimeEntityObjectLifetime.cs"],
+            runtimeDirectoryAllocators);
+    }
+
     [Fact]
     public void AppProjectionOwners_UseExactRuntimeKeysAndNoGuidDictionary()
     {
@@ -212,4 +276,18 @@ public sealed class RuntimeEntityOwnershipTests
         field.FieldType.IsGenericType
         && field.FieldType.GetGenericTypeDefinition() == typeof(Dictionary<,>)
         && field.FieldType.GetGenericArguments()[0] == keyType;
+
+    private static string FindRepositoryRoot()
+    {
+        DirectoryInfo? directory = new(AppContext.BaseDirectory);
+        while (directory is not null)
+        {
+            if (File.Exists(Path.Combine(directory.FullName, "AcDream.slnx")))
+                return directory.FullName;
+            directory = directory.Parent;
+        }
+
+        throw new DirectoryNotFoundException(
+            $"Could not find AcDream.slnx above {AppContext.BaseDirectory}.");
+    }
 }

tests/AcDream.Runtime.Tests/Entities/RuntimeEntityObjectLifetimeTests.cs

@@ -0,0 +1,251 @@
+using AcDream.Core.Net;
+using AcDream.Core.Net.Messages;
+using AcDream.Core.Physics;
+using AcDream.Runtime.Entities;
+
+namespace AcDream.Runtime.Tests.Entities;
+
+public sealed class RuntimeEntityObjectLifetimeTests
+{
+    [Fact]
+    public void Owner_ConstructsOneExactDirectoryAndObjectTablePerInstance()
+    {
+        var first = new RuntimeEntityObjectLifetime();
+        var second = new RuntimeEntityObjectLifetime();
+
+        Assert.NotSame(first.Entities, second.Entities);
+        Assert.NotSame(first.Objects, second.Objects);
+        Assert.Same(first.Entities, first.Entities);
+        Assert.Same(first.Objects, first.Objects);
+    }
+
+    [Fact]
+    public void Owner_ConstructionLoadsNoPresentationOrBackendAssembly()
+    {
+        _ = new RuntimeEntityObjectLifetime();
+
+        string[] loaded = AppDomain.CurrentDomain
+            .GetAssemblies()
+            .Select(assembly => assembly.GetName().Name ?? string.Empty)
+            .ToArray();
+        Assert.DoesNotContain(loaded, name =>
+            name.StartsWith("AcDream.App", StringComparison.Ordinal)
+            || name.StartsWith("AcDream.UI.", StringComparison.Ordinal)
+            || name.StartsWith("Silk.NET", StringComparison.Ordinal)
+            || name.StartsWith("OpenAL", StringComparison.Ordinal)
+            || name.StartsWith("ImGui", StringComparison.Ordinal));
+    }
+
+    [Fact]
+    public void SeparateOwners_IsolateConflictingGuidsAndContents()
+    {
+        const uint guid = 0x70000001u;
+        var first = new RuntimeEntityObjectLifetime();
+        var second = new RuntimeEntityObjectLifetime();
+        RuntimeEntityRecord firstRecord = Accept(first, Spawn(guid, 1, "first"));
+        RuntimeEntityRecord secondRecord = Accept(second, Spawn(guid, 9, "second"));
+
+        Assert.True(first.ApplyAcceptedSpawn(
+            firstRecord,
+            firstRecord.CreateIntegrationVersion,
+            firstRecord.Snapshot,
+            replaceGeneration: false));
+        Assert.True(second.ApplyAcceptedSpawn(
+            secondRecord,
+            secondRecord.CreateIntegrationVersion,
+            secondRecord.Snapshot,
+            replaceGeneration: false));
+
+        Assert.Equal("first", first.Objects.Get(guid)!.Name);
+        Assert.Equal("second", second.Objects.Get(guid)!.Name);
+        Assert.Equal((ushort)1, firstRecord.Incarnation);
+        Assert.Equal((ushort)9, secondRecord.Incarnation);
+    }
+
+    [Fact]
+    public void AcceptedSpawn_RejectsWrongOrSupersededCanonicalIncarnation()
+    {
+        var lifetime = new RuntimeEntityObjectLifetime();
+        WorldSession.EntitySpawn spawn = Spawn(0x70000002u, 3, "current");
+        RuntimeEntityRecord canonical = Accept(lifetime, spawn);
+        var wrong = new RuntimeEntityObjectLifetime();
+        RuntimeEntityRecord wrongCanonical = Accept(wrong, spawn);
+
+        Assert.False(lifetime.ApplyAcceptedSpawn(
+            wrongCanonical,
+            wrongCanonical.CreateIntegrationVersion,
+            spawn,
+            replaceGeneration: false));
+
+        ulong expectedVersion = canonical.CreateIntegrationVersion;
+        lifetime.Entities.AdvanceCreateAuthority(canonical);
+        Assert.False(lifetime.ApplyAcceptedSpawn(
+            canonical,
+            expectedVersion,
+            spawn,
+            replaceGeneration: false));
+        Assert.Null(lifetime.Objects.Get(spawn.Guid));
+    }
+
+    [Fact]
+    public void AcceptedSpawn_RevalidatesAfterSynchronousObjectCallbacks()
+    {
+        var lifetime = new RuntimeEntityObjectLifetime();
+        WorldSession.EntitySpawn spawn = Spawn(0x70000003u, 4, "reentrant");
+        RuntimeEntityRecord canonical = Accept(lifetime, spawn);
+        ulong expectedVersion = canonical.CreateIntegrationVersion;
+        lifetime.Objects.ObjectAdded += _ =>
+            lifetime.Entities.AdvanceCreateAuthority(canonical);
+
+        Assert.False(lifetime.ApplyAcceptedSpawn(
+            canonical,
+            expectedVersion,
+            spawn,
+            replaceGeneration: false));
+        Assert.NotNull(lifetime.Objects.Get(spawn.Guid));
+    }
+
+    [Fact]
+    public void AcceptedDelete_RemovesOnlyMatchingLogicalGeneration()
+    {
+        var lifetime = new RuntimeEntityObjectLifetime();
+        WorldSession.EntitySpawn spawn = Spawn(0x70000004u, 6, "retained");
+        RuntimeEntityRecord canonical = Accept(lifetime, spawn);
+        Assert.True(lifetime.ApplyAcceptedSpawn(
+            canonical,
+            canonical.CreateIntegrationVersion,
+            spawn,
+            replaceGeneration: true));
+
+        Assert.False(lifetime.TryAcceptDelete(
+            new DeleteObject.Parsed(spawn.Guid, 7),
+            isLocalPlayer: false,
+            out _));
+        Assert.NotNull(lifetime.Objects.Get(spawn.Guid));
+
+        Assert.True(lifetime.TryAcceptDelete(
+            new DeleteObject.Parsed(spawn.Guid, 6),
+            isLocalPlayer: false,
+            out RuntimeEntityDeleteAcceptance accepted));
+        lifetime.CompleteAcceptedDelete(accepted);
+        Assert.Null(lifetime.Objects.Get(spawn.Guid));
+    }
+
+    [Fact]
+    public void DeleteAcceptance_CannotCrossOwnersOrReplay()
+    {
+        var owner = new RuntimeEntityObjectLifetime();
+        var other = new RuntimeEntityObjectLifetime();
+        WorldSession.EntitySpawn spawn = Spawn(0x70000006u, 8, "token");
+        RuntimeEntityRecord canonical = Accept(owner, spawn);
+        Assert.True(owner.ApplyAcceptedSpawn(
+            canonical,
+            canonical.CreateIntegrationVersion,
+            spawn,
+            replaceGeneration: true));
+        Assert.True(owner.TryAcceptDelete(
+            new DeleteObject.Parsed(spawn.Guid, spawn.InstanceSequence),
+            isLocalPlayer: false,
+            out RuntimeEntityDeleteAcceptance acceptance));
+
+        Assert.Throws<InvalidOperationException>(
+            () => other.CompleteAcceptedDelete(acceptance));
+        owner.CompleteAcceptedDelete(acceptance);
+        Assert.Throws<InvalidOperationException>(
+            () => owner.CompleteAcceptedDelete(acceptance));
+        Assert.Null(owner.Objects.Get(spawn.Guid));
+    }
+
+    [Fact]
+    public void ClearObjects_DoesNotResetCanonicalEntityIdentity()
+    {
+        var lifetime = new RuntimeEntityObjectLifetime();
+        WorldSession.EntitySpawn spawn = Spawn(0x70000005u, 2, "clear");
+        RuntimeEntityRecord canonical = Accept(lifetime, spawn);
+        Assert.True(lifetime.ApplyAcceptedSpawn(
+            canonical,
+            canonical.CreateIntegrationVersion,
+            spawn,
+            replaceGeneration: false));
+
+        lifetime.ClearObjects();
+
+        Assert.Null(lifetime.Objects.Get(spawn.Guid));
+        Assert.True(lifetime.Entities.TryGetActive(spawn.Guid, out var retained));
+        Assert.Same(canonical, retained);
+    }
+
+    private static RuntimeEntityRecord Accept(
+        RuntimeEntityObjectLifetime lifetime,
+        WorldSession.EntitySpawn spawn)
+    {
+        InboundCreateResult accepted = lifetime.Entities.AcceptCreate(spawn);
+        return lifetime.Entities.AddActive(accepted.Snapshot);
+    }
+
+    private static WorldSession.EntitySpawn Spawn(
+        uint guid,
+        ushort instance,
+        string name)
+    {
+        var position = new CreateObject.ServerPosition(
+            0x0101FFFFu,
+            10f,
+            20f,
+            5f,
+            1f,
+            0f,
+            0f,
+            0f);
+        var timestamps = new PhysicsTimestamps(
+            Position: 1,
+            Movement: 1,
+            State: 1,
+            Vector: 1,
+            Teleport: 0,
+            ServerControlledMove: 1,
+            ForcePosition: 0,
+            ObjDesc: 1,
+            Instance: instance);
+        var physics = new PhysicsSpawnData(
+            RawState: 0x408u,
+            Position: position,
+            Movement: null,
+            AnimationFrame: null,
+            SetupTableId: 0x02000001u,
+            MotionTableId: 0x09000001u,
+            SoundTableId: null,
+            PhysicsScriptTableId: null,
+            Parent: null,
+            Children: null,
+            Scale: null,
+            Friction: null,
+            Elasticity: null,
+            Translucency: null,
+            Velocity: null,
+            Acceleration: null,
+            AngularVelocity: null,
+            DefaultScriptType: null,
+            DefaultScriptIntensity: null,
+            Timestamps: timestamps);
+        return new WorldSession.EntitySpawn(
+            guid,
+            position,
+            0x02000001u,
+            Array.Empty<CreateObject.AnimPartChange>(),
+            Array.Empty<CreateObject.TextureChange>(),
+            Array.Empty<CreateObject.SubPaletteSwap>(),
+            null,
+            null,
+            name,
+            null,
+            null,
+            0x09000001u,
+            PhysicsState: 0x408u,
+            InstanceSequence: instance,
+            MovementSequence: 1,
+            ServerControlSequence: 1,
+            PositionSequence: 1,
+            Physics: physics);
+    }
+}