Phase 5 step 5

tests/RuntimeSubsystemTests.cpp

@@ -9,6 +9,7 @@
 #include <filesystem>
 #include <fstream>
 #include <iostream>
+#include <map>
 #include <string>
 #include <variant>
 #include <windows.h>
@@ -323,6 +324,22 @@ void TestRuntimeCoordinatorPersistenceEvents()
 		Expect(!oscCommitSnapshot.currentValue.numberValues.empty() &&
 				oscCommitSnapshot.currentValue.numberValues[0] == 0.2,
 			"settled OSC commit updates the committed session value");
+
+		CommittedLiveStateReadModel committedLiveState = store.BuildCommittedLiveStateReadModel();
+		Expect(!committedLiveState.layers.empty(), "committed live read model exposes current session layers");
+		const auto committedLayerIt = std::find_if(committedLiveState.layers.begin(), committedLiveState.layers.end(),
+			[&oscCommitSnapshot](const RuntimeStore::LayerPersistentState& layer) { return layer.id == oscCommitSnapshot.layerId; });
+		Expect(committedLayerIt != committedLiveState.layers.end(), "committed live read model preserves layer identity");
+		if (committedLayerIt != committedLiveState.layers.end())
+		{
+			const auto committedValueIt = committedLayerIt->parameterValues.find("gain");
+			Expect(committedValueIt != committedLayerIt->parameterValues.end() &&
+					!committedValueIt->second.numberValues.empty() &&
+					committedValueIt->second.numberValues[0] == 0.2,
+				"committed live read model includes session-only OSC commit value");
+		}
+		Expect(committedLiveState.packagesById.find("alpha") != committedLiveState.packagesById.end(),
+			"committed live read model carries package definitions for snapshot publication");
 	}
 
 	std::filesystem::remove_all(root);