diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8384697..976f5f6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -102,32 +102,34 @@ set(APP_SOURCES
 	"${APP_DIR}/platform/NativeHandles.h"
 	"${APP_DIR}/platform/NativeSockets.h"
 	"${APP_DIR}/resource.h"
-	"${APP_DIR}/runtime/HealthTelemetry.cpp"
-	"${APP_DIR}/runtime/HealthTelemetry.h"
-	"${APP_DIR}/runtime/LayerStackStore.cpp"
-	"${APP_DIR}/runtime/LayerStackStore.h"
-	"${APP_DIR}/runtime/RenderSnapshotBuilder.cpp"
-	"${APP_DIR}/runtime/RenderSnapshotBuilder.h"
-	"${APP_DIR}/runtime/RuntimeConfigStore.cpp"
-	"${APP_DIR}/runtime/RuntimeConfigStore.h"
-	"${APP_DIR}/runtime/RuntimeCoordinator.cpp"
-	"${APP_DIR}/runtime/RuntimeCoordinator.h"
-	"${APP_DIR}/runtime/RuntimeSnapshotProvider.cpp"
-	"${APP_DIR}/runtime/RuntimeSnapshotProvider.h"
-	"${APP_DIR}/runtime/RuntimeStateJson.cpp"
-	"${APP_DIR}/runtime/RuntimeStateJson.h"
-	"${APP_DIR}/runtime/RuntimeStatePresenter.cpp"
-	"${APP_DIR}/runtime/RuntimeStatePresenter.h"
-	"${APP_DIR}/runtime/RuntimeClock.cpp"
-	"${APP_DIR}/runtime/RuntimeClock.h"
-	"${APP_DIR}/runtime/RuntimeJson.cpp"
-	"${APP_DIR}/runtime/RuntimeJson.h"
-	"${APP_DIR}/runtime/RuntimeParameterUtils.cpp"
-	"${APP_DIR}/runtime/RuntimeParameterUtils.h"
-	"${APP_DIR}/runtime/RuntimeStore.cpp"
-	"${APP_DIR}/runtime/RuntimeStore.h"
-	"${APP_DIR}/runtime/ShaderPackageCatalog.cpp"
-	"${APP_DIR}/runtime/ShaderPackageCatalog.h"
+	"${APP_DIR}/runtime/coordination/RuntimeCoordinator.cpp"
+	"${APP_DIR}/runtime/coordination/RuntimeCoordinator.h"
+	"${APP_DIR}/runtime/legacy/RuntimeHost.cpp"
+	"${APP_DIR}/runtime/legacy/RuntimeHost.h"
+	"${APP_DIR}/runtime/presentation/RuntimeStateJson.cpp"
+	"${APP_DIR}/runtime/presentation/RuntimeStateJson.h"
+	"${APP_DIR}/runtime/presentation/RuntimeStatePresenter.cpp"
+	"${APP_DIR}/runtime/presentation/RuntimeStatePresenter.h"
+	"${APP_DIR}/runtime/snapshot/RenderSnapshotBuilder.cpp"
+	"${APP_DIR}/runtime/snapshot/RenderSnapshotBuilder.h"
+	"${APP_DIR}/runtime/snapshot/RuntimeSnapshotProvider.cpp"
+	"${APP_DIR}/runtime/snapshot/RuntimeSnapshotProvider.h"
+	"${APP_DIR}/runtime/store/LayerStackStore.cpp"
+	"${APP_DIR}/runtime/store/LayerStackStore.h"
+	"${APP_DIR}/runtime/store/RuntimeConfigStore.cpp"
+	"${APP_DIR}/runtime/store/RuntimeConfigStore.h"
+	"${APP_DIR}/runtime/store/RuntimeStore.cpp"
+	"${APP_DIR}/runtime/store/RuntimeStore.h"
+	"${APP_DIR}/runtime/store/ShaderPackageCatalog.cpp"
+	"${APP_DIR}/runtime/store/ShaderPackageCatalog.h"
+	"${APP_DIR}/runtime/support/RuntimeJson.cpp"
+	"${APP_DIR}/runtime/support/RuntimeJson.h"
+	"${APP_DIR}/runtime/support/RuntimeParameterUtils.cpp"
+	"${APP_DIR}/runtime/support/RuntimeParameterUtils.h"
+	"${APP_DIR}/runtime/telemetry/HealthTelemetry.cpp"
+	"${APP_DIR}/runtime/telemetry/HealthTelemetry.h"
+	"${APP_DIR}/runtime/telemetry/RuntimeClock.cpp"
+	"${APP_DIR}/runtime/telemetry/RuntimeClock.h"
 	"${APP_DIR}/shader/ShaderCompiler.cpp"
 	"${APP_DIR}/shader/ShaderCompiler.h"
 	"${APP_DIR}/shader/ShaderPackageRegistry.cpp"
@@ -156,6 +158,13 @@ target_include_directories(LoopThroughWithOpenGLCompositing PRIVATE
 	"${APP_DIR}/gl/shader"
 	"${APP_DIR}/platform"
 	"${APP_DIR}/runtime"
+	"${APP_DIR}/runtime/coordination"
+	"${APP_DIR}/runtime/legacy"
+	"${APP_DIR}/runtime/presentation"
+	"${APP_DIR}/runtime/snapshot"
+	"${APP_DIR}/runtime/store"
+	"${APP_DIR}/runtime/support"
+	"${APP_DIR}/runtime/telemetry"
 	"${APP_DIR}/shader"
 	"${APP_DIR}/videoio"
 	"${APP_DIR}/videoio/decklink"
@@ -182,13 +191,14 @@ if(MSVC)
 endif()
 
 add_executable(RuntimeJsonTests
-	"${APP_DIR}/runtime/RuntimeJson.cpp"
+	"${APP_DIR}/runtime/support/RuntimeJson.cpp"
 	"${CMAKE_CURRENT_SOURCE_DIR}/tests/RuntimeJsonTests.cpp"
 )
 
 target_include_directories(RuntimeJsonTests PRIVATE
 	"${APP_DIR}"
 	"${APP_DIR}/runtime"
+	"${APP_DIR}/runtime/support"
 )
 
 if(MSVC)
@@ -199,13 +209,14 @@ enable_testing()
 add_test(NAME RuntimeJsonTests COMMAND RuntimeJsonTests)
 
 add_executable(RuntimeClockTests
-	"${APP_DIR}/runtime/RuntimeClock.cpp"
+	"${APP_DIR}/runtime/telemetry/RuntimeClock.cpp"
 	"${CMAKE_CURRENT_SOURCE_DIR}/tests/RuntimeClockTests.cpp"
 )
 
 target_include_directories(RuntimeClockTests PRIVATE
 	"${APP_DIR}"
 	"${APP_DIR}/runtime"
+	"${APP_DIR}/runtime/telemetry"
 )
 
 if(MSVC)
@@ -215,14 +226,15 @@ endif()
 add_test(NAME RuntimeClockTests COMMAND RuntimeClockTests)
 
 add_executable(RuntimeParameterUtilsTests
-	"${APP_DIR}/runtime/RuntimeJson.cpp"
-	"${APP_DIR}/runtime/RuntimeParameterUtils.cpp"
+	"${APP_DIR}/runtime/support/RuntimeJson.cpp"
+	"${APP_DIR}/runtime/support/RuntimeParameterUtils.cpp"
 	"${CMAKE_CURRENT_SOURCE_DIR}/tests/RuntimeParameterUtilsTests.cpp"
 )
 
 target_include_directories(RuntimeParameterUtilsTests PRIVATE
 	"${APP_DIR}"
 	"${APP_DIR}/runtime"
+	"${APP_DIR}/runtime/support"
 	"${APP_DIR}/shader"
 )
 
@@ -249,7 +261,7 @@ endif()
 add_test(NAME Std140BufferTests COMMAND Std140BufferTests)
 
 add_executable(ShaderPackageRegistryTests
-	"${APP_DIR}/runtime/RuntimeJson.cpp"
+	"${APP_DIR}/runtime/support/RuntimeJson.cpp"
 	"${APP_DIR}/shader/ShaderPackageRegistry.cpp"
 	"${CMAKE_CURRENT_SOURCE_DIR}/tests/ShaderPackageRegistryTests.cpp"
 )
@@ -257,6 +269,7 @@ add_executable(ShaderPackageRegistryTests
 target_include_directories(ShaderPackageRegistryTests PRIVATE
 	"${APP_DIR}"
 	"${APP_DIR}/runtime"
+	"${APP_DIR}/runtime/support"
 	"${APP_DIR}/shader"
 )
 
@@ -267,7 +280,7 @@ endif()
 add_test(NAME ShaderPackageRegistryTests COMMAND ShaderPackageRegistryTests)
 
 add_executable(ShaderSlangValidationTests
-	"${APP_DIR}/runtime/RuntimeJson.cpp"
+	"${APP_DIR}/runtime/support/RuntimeJson.cpp"
 	"${APP_DIR}/shader/ShaderCompiler.cpp"
 	"${APP_DIR}/shader/ShaderPackageRegistry.cpp"
 	"${CMAKE_CURRENT_SOURCE_DIR}/tests/ShaderSlangValidationTests.cpp"
@@ -277,6 +290,7 @@ target_include_directories(ShaderSlangValidationTests PRIVATE
 	"${APP_DIR}"
 	"${APP_DIR}/platform"
 	"${APP_DIR}/runtime"
+	"${APP_DIR}/runtime/support"
 	"${APP_DIR}/shader"
 )
 
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeCoordinator.cpp b/apps/LoopThroughWithOpenGLCompositing/runtime/coordination/RuntimeCoordinator.cpp
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeCoordinator.cpp
rename to apps/LoopThroughWithOpenGLCompositing/runtime/coordination/RuntimeCoordinator.cpp
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeCoordinator.h b/apps/LoopThroughWithOpenGLCompositing/runtime/coordination/RuntimeCoordinator.h
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeCoordinator.h
rename to apps/LoopThroughWithOpenGLCompositing/runtime/coordination/RuntimeCoordinator.h
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp b/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp
rename to apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.h b/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.h
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.h
rename to apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.h
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStateJson.cpp b/apps/LoopThroughWithOpenGLCompositing/runtime/presentation/RuntimeStateJson.cpp
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStateJson.cpp
rename to apps/LoopThroughWithOpenGLCompositing/runtime/presentation/RuntimeStateJson.cpp
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStateJson.h b/apps/LoopThroughWithOpenGLCompositing/runtime/presentation/RuntimeStateJson.h
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStateJson.h
rename to apps/LoopThroughWithOpenGLCompositing/runtime/presentation/RuntimeStateJson.h
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStatePresenter.cpp b/apps/LoopThroughWithOpenGLCompositing/runtime/presentation/RuntimeStatePresenter.cpp
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStatePresenter.cpp
rename to apps/LoopThroughWithOpenGLCompositing/runtime/presentation/RuntimeStatePresenter.cpp
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStatePresenter.h b/apps/LoopThroughWithOpenGLCompositing/runtime/presentation/RuntimeStatePresenter.h
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStatePresenter.h
rename to apps/LoopThroughWithOpenGLCompositing/runtime/presentation/RuntimeStatePresenter.h
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RenderSnapshotBuilder.cpp b/apps/LoopThroughWithOpenGLCompositing/runtime/snapshot/RenderSnapshotBuilder.cpp
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RenderSnapshotBuilder.cpp
rename to apps/LoopThroughWithOpenGLCompositing/runtime/snapshot/RenderSnapshotBuilder.cpp
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RenderSnapshotBuilder.h b/apps/LoopThroughWithOpenGLCompositing/runtime/snapshot/RenderSnapshotBuilder.h
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RenderSnapshotBuilder.h
rename to apps/LoopThroughWithOpenGLCompositing/runtime/snapshot/RenderSnapshotBuilder.h
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeSnapshotProvider.cpp b/apps/LoopThroughWithOpenGLCompositing/runtime/snapshot/RuntimeSnapshotProvider.cpp
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeSnapshotProvider.cpp
rename to apps/LoopThroughWithOpenGLCompositing/runtime/snapshot/RuntimeSnapshotProvider.cpp
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeSnapshotProvider.h b/apps/LoopThroughWithOpenGLCompositing/runtime/snapshot/RuntimeSnapshotProvider.h
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeSnapshotProvider.h
rename to apps/LoopThroughWithOpenGLCompositing/runtime/snapshot/RuntimeSnapshotProvider.h
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/LayerStackStore.cpp b/apps/LoopThroughWithOpenGLCompositing/runtime/store/LayerStackStore.cpp
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/LayerStackStore.cpp
rename to apps/LoopThroughWithOpenGLCompositing/runtime/store/LayerStackStore.cpp
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/LayerStackStore.h b/apps/LoopThroughWithOpenGLCompositing/runtime/store/LayerStackStore.h
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/LayerStackStore.h
rename to apps/LoopThroughWithOpenGLCompositing/runtime/store/LayerStackStore.h
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeConfigStore.cpp b/apps/LoopThroughWithOpenGLCompositing/runtime/store/RuntimeConfigStore.cpp
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeConfigStore.cpp
rename to apps/LoopThroughWithOpenGLCompositing/runtime/store/RuntimeConfigStore.cpp
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeConfigStore.h b/apps/LoopThroughWithOpenGLCompositing/runtime/store/RuntimeConfigStore.h
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeConfigStore.h
rename to apps/LoopThroughWithOpenGLCompositing/runtime/store/RuntimeConfigStore.h
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStore.cpp b/apps/LoopThroughWithOpenGLCompositing/runtime/store/RuntimeStore.cpp
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStore.cpp
rename to apps/LoopThroughWithOpenGLCompositing/runtime/store/RuntimeStore.cpp
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStore.h b/apps/LoopThroughWithOpenGLCompositing/runtime/store/RuntimeStore.h
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStore.h
rename to apps/LoopThroughWithOpenGLCompositing/runtime/store/RuntimeStore.h
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/ShaderPackageCatalog.cpp b/apps/LoopThroughWithOpenGLCompositing/runtime/store/ShaderPackageCatalog.cpp
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/ShaderPackageCatalog.cpp
rename to apps/LoopThroughWithOpenGLCompositing/runtime/store/ShaderPackageCatalog.cpp
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/ShaderPackageCatalog.h b/apps/LoopThroughWithOpenGLCompositing/runtime/store/ShaderPackageCatalog.h
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/ShaderPackageCatalog.h
rename to apps/LoopThroughWithOpenGLCompositing/runtime/store/ShaderPackageCatalog.h
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeJson.cpp b/apps/LoopThroughWithOpenGLCompositing/runtime/support/RuntimeJson.cpp
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeJson.cpp
rename to apps/LoopThroughWithOpenGLCompositing/runtime/support/RuntimeJson.cpp
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeJson.h b/apps/LoopThroughWithOpenGLCompositing/runtime/support/RuntimeJson.h
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeJson.h
rename to apps/LoopThroughWithOpenGLCompositing/runtime/support/RuntimeJson.h
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeParameterUtils.cpp b/apps/LoopThroughWithOpenGLCompositing/runtime/support/RuntimeParameterUtils.cpp
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeParameterUtils.cpp
rename to apps/LoopThroughWithOpenGLCompositing/runtime/support/RuntimeParameterUtils.cpp
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeParameterUtils.h b/apps/LoopThroughWithOpenGLCompositing/runtime/support/RuntimeParameterUtils.h
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeParameterUtils.h
rename to apps/LoopThroughWithOpenGLCompositing/runtime/support/RuntimeParameterUtils.h
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/HealthTelemetry.cpp b/apps/LoopThroughWithOpenGLCompositing/runtime/telemetry/HealthTelemetry.cpp
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/HealthTelemetry.cpp
rename to apps/LoopThroughWithOpenGLCompositing/runtime/telemetry/HealthTelemetry.cpp
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/HealthTelemetry.h b/apps/LoopThroughWithOpenGLCompositing/runtime/telemetry/HealthTelemetry.h
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/HealthTelemetry.h
rename to apps/LoopThroughWithOpenGLCompositing/runtime/telemetry/HealthTelemetry.h
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeClock.cpp b/apps/LoopThroughWithOpenGLCompositing/runtime/telemetry/RuntimeClock.cpp
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeClock.cpp
rename to apps/LoopThroughWithOpenGLCompositing/runtime/telemetry/RuntimeClock.cpp
diff --git a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeClock.h b/apps/LoopThroughWithOpenGLCompositing/runtime/telemetry/RuntimeClock.h
similarity index 100%
rename from apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeClock.h
rename to apps/LoopThroughWithOpenGLCompositing/runtime/telemetry/RuntimeClock.h
diff --git a/docs/ARCHITECTURE_RESILIENCE_REVIEW.md b/docs/ARCHITECTURE_RESILIENCE_REVIEW.md
index ab3f3d0..7c7928a 100644
--- a/docs/ARCHITECTURE_RESILIENCE_REVIEW.md
+++ b/docs/ARCHITECTURE_RESILIENCE_REVIEW.md
@@ -47,7 +47,7 @@ That makes it a single contention and failure domain. It is also why OSC and ren
 
 Relevant code:
 
-- [RuntimeHost.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.h:15)
+- [RuntimeHost.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.h:15)
 
 Recommended direction:
 
@@ -258,7 +258,7 @@ Recommended direction:
 
 Relevant code:
 
-- [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1841)
+- [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1841)
 
 Recent OSC work already reduced this problem for live automation, but the broader architecture would still benefit from:
 
diff --git a/docs/PHASE_1_SUBSYSTEM_BOUNDARIES_DESIGN.md b/docs/PHASE_1_SUBSYSTEM_BOUNDARIES_DESIGN.md
index 5c47fac..b2422e6 100644
--- a/docs/PHASE_1_SUBSYSTEM_BOUNDARIES_DESIGN.md
+++ b/docs/PHASE_1_SUBSYSTEM_BOUNDARIES_DESIGN.md
@@ -55,8 +55,8 @@ This phase is the target design and the dependency rules. Later phases perform t
 The following current code paths are the strongest evidence for the split proposed here:
 
 - `RuntimeHost` is both store and live authority:
-  - [RuntimeHost.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.h:15)
-  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:726)
+  - [RuntimeHost.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.h:15)
+  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:726)
 - `OpenGLComposite` is both app orchestrator and render/runtime coordinator:
   - [OpenGLComposite.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/gl/OpenGLComposite.cpp:106)
   - [OpenGLComposite.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/gl/OpenGLComposite.cpp:283)
@@ -100,29 +100,29 @@ This document is the parent note for the Phase 1 subsystem package. The bundle i
 The codebase now has an initial Phase 1 compatibility split in place:
 
 - `RuntimeStore`
-  - [RuntimeStore.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStore.h)
-  - [RuntimeStore.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStore.cpp)
+  - [RuntimeStore.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/store/RuntimeStore.h)
+  - [RuntimeStore.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/store/RuntimeStore.cpp)
 - `RuntimeConfigStore`
-  - [RuntimeConfigStore.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeConfigStore.h)
-  - [RuntimeConfigStore.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeConfigStore.cpp)
+  - [RuntimeConfigStore.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/store/RuntimeConfigStore.h)
+  - [RuntimeConfigStore.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/store/RuntimeConfigStore.cpp)
 - `ShaderPackageCatalog`
-  - [ShaderPackageCatalog.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/ShaderPackageCatalog.h)
-  - [ShaderPackageCatalog.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/ShaderPackageCatalog.cpp)
+  - [ShaderPackageCatalog.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/store/ShaderPackageCatalog.h)
+  - [ShaderPackageCatalog.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/store/ShaderPackageCatalog.cpp)
 - `RuntimeCoordinator`
-  - [RuntimeCoordinator.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeCoordinator.h)
-  - [RuntimeCoordinator.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeCoordinator.cpp)
+  - [RuntimeCoordinator.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/coordination/RuntimeCoordinator.h)
+  - [RuntimeCoordinator.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/coordination/RuntimeCoordinator.cpp)
 - `RuntimeSnapshotProvider`
-  - [RuntimeSnapshotProvider.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeSnapshotProvider.h)
-  - [RuntimeSnapshotProvider.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeSnapshotProvider.cpp)
+  - [RuntimeSnapshotProvider.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/snapshot/RuntimeSnapshotProvider.h)
+  - [RuntimeSnapshotProvider.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/snapshot/RuntimeSnapshotProvider.cpp)
 - `RenderSnapshotBuilder`
-  - [RenderSnapshotBuilder.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RenderSnapshotBuilder.h)
-  - [RenderSnapshotBuilder.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RenderSnapshotBuilder.cpp)
+  - [RenderSnapshotBuilder.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/snapshot/RenderSnapshotBuilder.h)
+  - [RenderSnapshotBuilder.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/snapshot/RenderSnapshotBuilder.cpp)
 - `ControlServices`
   - [ControlServices.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/control/ControlServices.h)
   - [ControlServices.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/control/ControlServices.cpp)
 - `HealthTelemetry`
-  - [HealthTelemetry.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/HealthTelemetry.h)
-  - [HealthTelemetry.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/HealthTelemetry.cpp)
+  - [HealthTelemetry.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/telemetry/HealthTelemetry.h)
+  - [HealthTelemetry.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/telemetry/HealthTelemetry.cpp)
 - `RenderEngine`
   - [RenderEngine.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/gl/RenderEngine.h)
   - [RenderEngine.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/gl/RenderEngine.cpp)
diff --git a/docs/subsystems/HealthTelemetry.md b/docs/subsystems/HealthTelemetry.md
index 937ce71..8a323da 100644
--- a/docs/subsystems/HealthTelemetry.md
+++ b/docs/subsystems/HealthTelemetry.md
@@ -19,10 +19,10 @@ Today, those responsibilities are fragmented across `RuntimeHost` status setters
 The current code already contains meaningful health and timing signals, but they are spread through unrelated ownership domains:
 
 - `RuntimeHost` stores signal and timing status:
-  - [RuntimeHost.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.h:41)
-  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1353)
-  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1415)
-  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1441)
+  - [RuntimeHost.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.h:41)
+  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1353)
+  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1415)
+  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1441)
 - render and bridge code report timing by writing back into `RuntimeHost`:
   - [OpenGLRenderPipeline.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/gl/pipeline/OpenGLRenderPipeline.cpp:50)
   - [OpenGLVideoIOBridge.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/gl/pipeline/OpenGLVideoIOBridge.cpp:49)
@@ -386,10 +386,10 @@ These are the clearest existing candidates:
 
 See:
 
-- [RuntimeHost.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.h:41)
-- [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1353)
-- [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1415)
-- [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1441)
+- [RuntimeHost.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.h:41)
+- [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1353)
+- [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1415)
+- [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1441)
 
 In the target architecture, this kind of state should no longer sit on the same object that owns persistent layer truth.
 
diff --git a/docs/subsystems/RuntimeCoordinator.md b/docs/subsystems/RuntimeCoordinator.md
index e3982bc..35ef773 100644
--- a/docs/subsystems/RuntimeCoordinator.md
+++ b/docs/subsystems/RuntimeCoordinator.md
@@ -9,8 +9,8 @@ This document defines the target design for the `RuntimeCoordinator` subsystem i
 Today the app's mutation path is split across several places:
 
 - `RuntimeHost` performs validation, mutation, persistence, render-state invalidation, and some status updates:
-  - [RuntimeHost.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.h:15)
-  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:891)
+  - [RuntimeHost.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.h:15)
+  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:891)
 - `OpenGLComposite` currently acts like an orchestration shell and a mutation coordinator at the same time:
   - [OpenGLCompositeRuntimeControls.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/gl/OpenGLCompositeRuntimeControls.cpp:1)
 - `RuntimeServices` still owns some deferred control flow around OSC commit and polling:
@@ -67,7 +67,7 @@ This is the main policy surface that is currently spread between `RuntimeHost` m
 - `ApplyOscTargetByControlKey(...)`
 - `ResetLayerParameters(...)`
 
-See [RuntimeHost.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.h:15).
+See [RuntimeHost.h](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.h:15).
 
 ### 3. State classification
 
@@ -375,7 +375,7 @@ That "call host, then decide reload/broadcast policy" logic is a direct candidat
 - persistence writes
 - render-state dirty marking
 
-Examples in [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:891):
+Examples in [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:891):
 
 - `AddLayer(...)`
 - `SetLayerShader(...)`
diff --git a/docs/subsystems/RuntimeSnapshotProvider.md b/docs/subsystems/RuntimeSnapshotProvider.md
index e39469f..108272f 100644
--- a/docs/subsystems/RuntimeSnapshotProvider.md
+++ b/docs/subsystems/RuntimeSnapshotProvider.md
@@ -16,11 +16,11 @@ It exists to solve three current problems:
 
 Today the closest current behavior lives in:
 
-- [RuntimeHost::GetLayerRenderStates(...)](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1535)
-- [RuntimeHost::TryGetLayerRenderStates(...)](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1543)
-- [RuntimeHost::TryRefreshCachedLayerStates(...)](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1554)
-- [RuntimeHost::RefreshDynamicRenderStateFields(...)](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1582)
-- [RuntimeHost::BuildLayerRenderStatesLocked(...)](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1598)
+- [RuntimeHost::GetLayerRenderStates(...)](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1535)
+- [RuntimeHost::TryGetLayerRenderStates(...)](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1543)
+- [RuntimeHost::TryRefreshCachedLayerStates(...)](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1554)
+- [RuntimeHost::RefreshDynamicRenderStateFields(...)](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1582)
+- [RuntimeHost::BuildLayerRenderStatesLocked(...)](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1598)
 - the render-side cache usage in [OpenGLComposite.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/gl/OpenGLComposite.cpp:589)
 
 `RuntimeSnapshotProvider` should absorb that responsibility, but in a cleaner and more publish-oriented way.
diff --git a/docs/subsystems/RuntimeStore.md b/docs/subsystems/RuntimeStore.md
index d8a8f82..633b4b5 100644
--- a/docs/subsystems/RuntimeStore.md
+++ b/docs/subsystems/RuntimeStore.md
@@ -301,22 +301,22 @@ Today, `RuntimeHost` contains most of the responsibilities that should move into
 Key current code paths:
 
 - config load:
-  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1651)
+  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1651)
 - persistent state load:
-  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1748)
+  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1748)
 - persistent state save:
-  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1842)
+  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1842)
 - preset save/load:
-  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1286)
-  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1304)
+  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1286)
+  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1304)
 - state serialization helpers:
-  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:2061)
-  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:2172)
-  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:2268)
+  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:2061)
+  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:2172)
+  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:2268)
 - path and file helpers:
-  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:1988)
-  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:2002)
-  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp:2034)
+  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:1988)
+  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:2002)
+  - [RuntimeHost.cpp](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/apps/LoopThroughWithOpenGLCompositing/runtime/legacy/RuntimeHost.cpp:2034)
 
 Durable-state mutation entrypoints that currently live on `RuntimeHost` but conceptually split between coordinator and store: