diff --git a/src/AcDream.App/Physics/LiveEntityInboundAuthorityGate.cs b/src/AcDream.App/Physics/LiveEntityInboundAuthorityGate.cs
index 96916677..cae94521 100644
--- a/src/AcDream.App/Physics/LiveEntityInboundAuthorityGate.cs
+++ b/src/AcDream.App/Physics/LiveEntityInboundAuthorityGate.cs
@@ -3,6 +3,7 @@ using AcDream.App.World;
 using AcDream.Core.Net;
 using AcDream.Core.Net.Messages;
 using AcDream.Core.Physics;
+using AcDream.Runtime.Entities;
 
 namespace AcDream.App.Physics;
 
diff --git a/src/AcDream.App/Physics/LiveEntityNetworkUpdateController.cs b/src/AcDream.App/Physics/LiveEntityNetworkUpdateController.cs
index 603e22db..ac3c63f8 100644
--- a/src/AcDream.App/Physics/LiveEntityNetworkUpdateController.cs
+++ b/src/AcDream.App/Physics/LiveEntityNetworkUpdateController.cs
@@ -12,6 +12,7 @@ using AcDream.Core.Net;
 using AcDream.Core.Net.Messages;
 using AcDream.Core.Items;
 using AcDream.Core.Physics;
+using AcDream.Runtime.Entities;
 using AcDream.Core.Selection;
 using AcDream.Core.World;
 using DatReaderWriter;
diff --git a/src/AcDream.App/Rendering/EquippedChildRenderController.cs b/src/AcDream.App/Rendering/EquippedChildRenderController.cs
index 4aead8b7..bf168550 100644
--- a/src/AcDream.App/Rendering/EquippedChildRenderController.cs
+++ b/src/AcDream.App/Rendering/EquippedChildRenderController.cs
@@ -12,6 +12,7 @@ using AcDream.Content;
 using DatReaderWriter.DBObjs;
 using DatReaderWriter.Enums;
 using DatReaderWriter.Types;
+using AcDream.Runtime.Entities;
 
 namespace AcDream.App.Rendering;
 
diff --git a/src/AcDream.App/World/LiveEntityHydrationController.cs b/src/AcDream.App/World/LiveEntityHydrationController.cs
index 5b380456..08ac8a98 100644
--- a/src/AcDream.App/World/LiveEntityHydrationController.cs
+++ b/src/AcDream.App/World/LiveEntityHydrationController.cs
@@ -4,6 +4,7 @@ using AcDream.Core.Items;
 using AcDream.Core.Net;
 using AcDream.Core.Net.Messages;
 using AcDream.Core.World;
+using AcDream.Runtime.Entities;
 
 namespace AcDream.App.World;
 
diff --git a/src/AcDream.App/World/LiveEntityHydrationPorts.cs b/src/AcDream.App/World/LiveEntityHydrationPorts.cs
index 5687f64e..c555f2fe 100644
--- a/src/AcDream.App/World/LiveEntityHydrationPorts.cs
+++ b/src/AcDream.App/World/LiveEntityHydrationPorts.cs
@@ -5,6 +5,7 @@ using AcDream.App.Rendering.Vfx;
 using AcDream.App.Streaming;
 using AcDream.Core.Net;
 using AcDream.Core.Net.Messages;
+using AcDream.Runtime.Entities;
 
 namespace AcDream.App.World;
 
diff --git a/src/AcDream.App/World/LiveEntityRuntime.cs b/src/AcDream.App/World/LiveEntityRuntime.cs
index 378cac47..ced3ef7b 100644
--- a/src/AcDream.App/World/LiveEntityRuntime.cs
+++ b/src/AcDream.App/World/LiveEntityRuntime.cs
@@ -3,6 +3,7 @@ using AcDream.Core.Net;
 using AcDream.Core.Net.Messages;
 using AcDream.Core.Physics;
 using AcDream.Core.World;
+using AcDream.Runtime.Entities;
 using System.Numerics;
 using System.Runtime.ExceptionServices;
 
diff --git a/src/AcDream.App/World/LiveEntitySameGenerationUpdateRouter.cs b/src/AcDream.App/World/LiveEntitySameGenerationUpdateRouter.cs
index ce197103..108035ad 100644
--- a/src/AcDream.App/World/LiveEntitySameGenerationUpdateRouter.cs
+++ b/src/AcDream.App/World/LiveEntitySameGenerationUpdateRouter.cs
@@ -1,5 +1,6 @@
 using AcDream.Core.Net;
 using AcDream.Core.Net.Messages;
+using AcDream.Runtime.Entities;
 using AcDream.Core.Physics;
 
 namespace AcDream.App.World;
diff --git a/src/AcDream.App/World/LocalPhysicsTimestampPublisher.cs b/src/AcDream.App/World/LocalPhysicsTimestampPublisher.cs
index 965995ce..0b01b3c7 100644
--- a/src/AcDream.App/World/LocalPhysicsTimestampPublisher.cs
+++ b/src/AcDream.App/World/LocalPhysicsTimestampPublisher.cs
@@ -1,5 +1,6 @@
 using AcDream.App.Input;
 using AcDream.App.Net;
+using AcDream.Runtime.Entities;
 
 namespace AcDream.App.World;
 
diff --git a/src/AcDream.App/World/InboundPhysicsStateController.cs b/src/AcDream.Runtime/Entities/InboundPhysicsStateController.cs
similarity index 99%
rename from src/AcDream.App/World/InboundPhysicsStateController.cs
rename to src/AcDream.Runtime/Entities/InboundPhysicsStateController.cs
index d39ee515..2b949929 100644
--- a/src/AcDream.App/World/InboundPhysicsStateController.cs
+++ b/src/AcDream.Runtime/Entities/InboundPhysicsStateController.cs
@@ -2,7 +2,7 @@ using AcDream.Core.Net;
 using AcDream.Core.Net.Messages;
 using AcDream.Core.Physics;
 
-namespace AcDream.App.World;
+namespace AcDream.Runtime.Entities;
 
 /// <summary>
 /// Update-thread owner of inbound retail physics timestamps and the latest
diff --git a/src/AcDream.App/World/ParentAttachmentState.cs b/src/AcDream.Runtime/Entities/ParentAttachmentState.cs
similarity index 99%
rename from src/AcDream.App/World/ParentAttachmentState.cs
rename to src/AcDream.Runtime/Entities/ParentAttachmentState.cs
index 029bac83..abdc757a 100644
--- a/src/AcDream.App/World/ParentAttachmentState.cs
+++ b/src/AcDream.Runtime/Entities/ParentAttachmentState.cs
@@ -1,7 +1,7 @@
 using AcDream.Core.Net.Messages;
 using AcDream.Core.Physics;
 
-namespace AcDream.App.World;
+namespace AcDream.Runtime.Entities;
 
 /// <summary>
 /// Update-thread state machine for parent relations that may arrive before
diff --git a/tests/AcDream.App.Tests/Physics/LiveEntityInboundAuthorityGateTests.cs b/tests/AcDream.App.Tests/Physics/LiveEntityInboundAuthorityGateTests.cs
index b6885109..3c256cca 100644
--- a/tests/AcDream.App.Tests/Physics/LiveEntityInboundAuthorityGateTests.cs
+++ b/tests/AcDream.App.Tests/Physics/LiveEntityInboundAuthorityGateTests.cs
@@ -5,6 +5,7 @@ using AcDream.App.World;
 using AcDream.Core.Net;
 using AcDream.Core.Net.Messages;
 using AcDream.Core.Physics;
+using AcDream.Runtime.Entities;
 
 namespace AcDream.App.Tests.Physics;
 
diff --git a/tests/AcDream.App.Tests/Physics/ProjectileControllerTests.cs b/tests/AcDream.App.Tests/Physics/ProjectileControllerTests.cs
index 7d6644df..9fe8d5fa 100644
--- a/tests/AcDream.App.Tests/Physics/ProjectileControllerTests.cs
+++ b/tests/AcDream.App.Tests/Physics/ProjectileControllerTests.cs
@@ -8,6 +8,7 @@ using AcDream.Core.Net;
 using AcDream.Core.Net.Messages;
 using AcDream.Core.Physics;
 using AcDream.Core.World;
+using AcDream.Runtime.Entities;
 using DatReaderWriter.DBObjs;
 using DatReaderWriter.Types;
 
diff --git a/tests/AcDream.App.Tests/Rendering/EquippedChildProjectionWithdrawalTests.cs b/tests/AcDream.App.Tests/Rendering/EquippedChildProjectionWithdrawalTests.cs
index 03cca8d2..65d31c10 100644
--- a/tests/AcDream.App.Tests/Rendering/EquippedChildProjectionWithdrawalTests.cs
+++ b/tests/AcDream.App.Tests/Rendering/EquippedChildProjectionWithdrawalTests.cs
@@ -12,6 +12,7 @@ using AcDream.Core.Net.Messages;
 using AcDream.Core.World;
 using DatReaderWriter.DBObjs;
 using DatReaderWriter.Enums;
+using AcDream.Runtime.Entities;
 using DatReaderWriter.Types;
 
 namespace AcDream.App.Tests.Rendering;
diff --git a/tests/AcDream.App.Tests/World/LiveEntityHydrationControllerTests.cs b/tests/AcDream.App.Tests/World/LiveEntityHydrationControllerTests.cs
index 3574b6e7..b4ef508b 100644
--- a/tests/AcDream.App.Tests/World/LiveEntityHydrationControllerTests.cs
+++ b/tests/AcDream.App.Tests/World/LiveEntityHydrationControllerTests.cs
@@ -9,6 +9,7 @@ using AcDream.Core.Net;
 using AcDream.Core.Net.Messages;
 using AcDream.Core.Physics;
 using AcDream.Core.World;
+using AcDream.Runtime.Entities;
 
 namespace AcDream.App.Tests.World;
 
diff --git a/tests/AcDream.App.Tests/World/LiveEntityRuntimeTests.cs b/tests/AcDream.App.Tests/World/LiveEntityRuntimeTests.cs
index f0dd7c8d..f135f334 100644
--- a/tests/AcDream.App.Tests/World/LiveEntityRuntimeTests.cs
+++ b/tests/AcDream.App.Tests/World/LiveEntityRuntimeTests.cs
@@ -9,6 +9,7 @@ using AcDream.Core.Net.Messages;
 using AcDream.Core.Physics;
 using AcDream.Core.Vfx;
 using AcDream.Core.World;
+using AcDream.Runtime.Entities;
 using DatReaderWriter.DBObjs;
 using DatReaderWriter.Types;
 using DatPhysicsScript = DatReaderWriter.DBObjs.PhysicsScript;
diff --git a/tests/AcDream.App.Tests/World/LiveEntitySameGenerationUpdateRouterTests.cs b/tests/AcDream.App.Tests/World/LiveEntitySameGenerationUpdateRouterTests.cs
index d63245e6..299fde10 100644
--- a/tests/AcDream.App.Tests/World/LiveEntitySameGenerationUpdateRouterTests.cs
+++ b/tests/AcDream.App.Tests/World/LiveEntitySameGenerationUpdateRouterTests.cs
@@ -1,6 +1,7 @@
 using AcDream.App.World;
 using AcDream.Core.Net;
 using AcDream.Core.Net.Messages;
+using AcDream.Runtime.Entities;
 using AcDream.Core.Physics;
 
 namespace AcDream.App.Tests.World;
diff --git a/tests/AcDream.App.Tests/World/InboundPhysicsStateControllerTests.cs b/tests/AcDream.Runtime.Tests/Entities/InboundPhysicsStateControllerTests.cs
similarity index 99%
rename from tests/AcDream.App.Tests/World/InboundPhysicsStateControllerTests.cs
rename to tests/AcDream.Runtime.Tests/Entities/InboundPhysicsStateControllerTests.cs
index 5bcaa934..0b0b0259 100644
--- a/tests/AcDream.App.Tests/World/InboundPhysicsStateControllerTests.cs
+++ b/tests/AcDream.Runtime.Tests/Entities/InboundPhysicsStateControllerTests.cs
@@ -1,10 +1,10 @@
 using System.Numerics;
-using AcDream.App.World;
 using AcDream.Core.Net;
 using AcDream.Core.Net.Messages;
 using AcDream.Core.Physics;
+using AcDream.Runtime.Entities;
 
-namespace AcDream.App.Tests.World;
+namespace AcDream.Runtime.Tests.Entities;
 
 public sealed class InboundPhysicsStateControllerTests
 {
diff --git a/tests/AcDream.App.Tests/World/ParentAttachmentStateTests.cs b/tests/AcDream.Runtime.Tests/Entities/ParentAttachmentStateTests.cs
similarity index 99%
rename from tests/AcDream.App.Tests/World/ParentAttachmentStateTests.cs
rename to tests/AcDream.Runtime.Tests/Entities/ParentAttachmentStateTests.cs
index 5a1dd98b..dcdd433c 100644
--- a/tests/AcDream.App.Tests/World/ParentAttachmentStateTests.cs
+++ b/tests/AcDream.Runtime.Tests/Entities/ParentAttachmentStateTests.cs
@@ -1,10 +1,10 @@
-using AcDream.App.World;
 using AcDream.Core.Net;
 using AcDream.Core.Net.Messages;
 using AcDream.Core.Physics;
 using AcDream.Core.Items;
+using AcDream.Runtime.Entities;
 
-namespace AcDream.App.Tests.World;
+namespace AcDream.Runtime.Tests.Entities;
 
 public sealed class ParentAttachmentStateTests
 {