Pass 3

2026-05-11 02:06:17 +10:00
parent b2369c418b
commit 5cbdbd6813
22 changed files with 2069 additions and 1504 deletions
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -104,10 +104,20 @@ set(APP_SOURCES
 	"${APP_DIR}/resource.h"
 	"${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"
@@ -116,6 +126,8 @@ set(APP_SOURCES
 	"${APP_DIR}/runtime/RuntimeParameterUtils.h"
 	"${APP_DIR}/runtime/RuntimeStore.cpp"
 	"${APP_DIR}/runtime/RuntimeStore.h"
+	"${APP_DIR}/runtime/ShaderPackageCatalog.cpp"
+	"${APP_DIR}/runtime/ShaderPackageCatalog.h"
 	"${APP_DIR}/shader/ShaderCompiler.cpp"
 	"${APP_DIR}/shader/ShaderCompiler.h"
 	"${APP_DIR}/shader/ShaderPackageRegistry.cpp"
--- a/apps/LoopThroughWithOpenGLCompositing/gl/OpenGLComposite.cpp
+++ b/apps/LoopThroughWithOpenGLCompositing/gl/OpenGLComposite.cpp
@@ -36,7 +36,7 @@ OpenGLComposite::OpenGLComposite(HWND hWnd, HDC hDC, HGLRC hRC) :
 {
 	InitializeCriticalSection(&pMutex);
 	mRuntimeStore = std::make_unique<RuntimeStore>();
-	mRuntimeSnapshotProvider = std::make_unique<RuntimeSnapshotProvider>(*mRuntimeStore);
+	mRuntimeSnapshotProvider = std::make_unique<RuntimeSnapshotProvider>(mRuntimeStore->GetRenderSnapshotBuilder());
 	mRuntimeCoordinator = std::make_unique<RuntimeCoordinator>(*mRuntimeStore);
 	mRenderEngine = std::make_unique<RenderEngine>(
 		*mRuntimeSnapshotProvider,
--- a/apps/LoopThroughWithOpenGLCompositing/runtime/LayerStackStore.cpp
+++ b/apps/LoopThroughWithOpenGLCompositing/runtime/LayerStackStore.cpp
@@ -0,0 +1,738 @@
+#include "LayerStackStore.h"
+
+#include "RuntimeParameterUtils.h"
+#include "RuntimeStateJson.h"
+
+#include <algorithm>
+#include <cctype>
+#include <cmath>
+#include <set>
+#include <sstream>
+#include <utility>
+
+namespace
+{
+std::string TrimCopy(const std::string& text)
+{
+	std::size_t start = 0;
+	while (start < text.size() && std::isspace(static_cast<unsigned char>(text[start])))
+		++start;
+
+	std::size_t end = text.size();
+	while (end > start && std::isspace(static_cast<unsigned char>(text[end - 1])))
+		--end;
+
+	return text.substr(start, end - start);
+}
+
+std::string SimplifyControlKey(const std::string& text)
+{
+	std::string simplified;
+	for (unsigned char ch : text)
+	{
+		if (std::isalnum(ch))
+			simplified.push_back(static_cast<char>(std::tolower(ch)));
+	}
+	return simplified;
+}
+
+bool MatchesControlKey(const std::string& candidate, const std::string& key)
+{
+	return candidate == key || SimplifyControlKey(candidate) == SimplifyControlKey(key);
+}
+
+bool TryParseLayerIdNumber(const std::string& layerId, uint64_t& number)
+{
+	const std::string prefix = "layer-";
+	if (layerId.rfind(prefix, 0) != 0 || layerId.size() == prefix.size())
+		return false;
+
+	uint64_t parsed = 0;
+	for (std::size_t index = prefix.size(); index < layerId.size(); ++index)
+	{
+		const unsigned char ch = static_cast<unsigned char>(layerId[index]);
+		if (!std::isdigit(ch))
+			return false;
+		parsed = parsed * 10 + static_cast<uint64_t>(ch - '0');
+	}
+
+	number = parsed;
+	return true;
+}
+
+}
+
+bool LayerStackStore::LoadPersistentStateValue(const JsonValue& root)
+{
+	if (const JsonValue* layersValue = root.find("layers"))
+	{
+		for (const JsonValue& layerValue : layersValue->asArray())
+		{
+			if (!layerValue.isObject())
+				continue;
+			LayerPersistentState layer;
+			if (const JsonValue* idValue = layerValue.find("id"))
+				layer.id = idValue->asString();
+			if (const JsonValue* shaderIdValue = layerValue.find("shaderId"))
+				layer.shaderId = shaderIdValue->asString();
+			if (const JsonValue* bypassValue = layerValue.find("bypass"))
+				layer.bypass = bypassValue->asBoolean(false);
+			else if (const JsonValue* enabledValue = layerValue.find("enabled"))
+				layer.bypass = !enabledValue->asBoolean(true);
+
+			if (const JsonValue* parameterValues = layerValue.find("parameterValues"))
+			{
+				for (const auto& parameterItem : parameterValues->asObject())
+				{
+					ShaderParameterValue value;
+					const JsonValue& jsonValue = parameterItem.second;
+					if (jsonValue.isBoolean())
+						value.booleanValue = jsonValue.asBoolean();
+					else if (jsonValue.isString())
+						value.enumValue = jsonValue.asString();
+					else if (jsonValue.isNumber())
+						value.numberValues.push_back(jsonValue.asNumber());
+					else if (jsonValue.isArray())
+						value.numberValues = JsonArrayToNumbers(jsonValue);
+					layer.parameterValues[parameterItem.first] = value;
+				}
+			}
+
+			if (!layer.shaderId.empty())
+				mLayers.push_back(layer);
+		}
+	}
+	else
+	{
+		std::string activeShaderId;
+		if (const JsonValue* activeShaderValue = root.find("activeShaderId"))
+			activeShaderId = activeShaderValue->asString();
+
+		if (!activeShaderId.empty())
+		{
+			LayerPersistentState layer;
+			layer.id = GenerateLayerId(mLayers, mNextLayerId);
+			layer.shaderId = activeShaderId;
+			layer.bypass = false;
+
+			if (const JsonValue* valuesByShader = root.find("parameterValuesByShader"))
+			{
+				const JsonValue* shaderValues = valuesByShader->find(activeShaderId);
+				if (shaderValues)
+				{
+					for (const auto& parameterItem : shaderValues->asObject())
+					{
+						ShaderParameterValue value;
+						const JsonValue& jsonValue = parameterItem.second;
+						if (jsonValue.isBoolean())
+							value.booleanValue = jsonValue.asBoolean();
+						else if (jsonValue.isString())
+							value.enumValue = jsonValue.asString();
+						else if (jsonValue.isNumber())
+							value.numberValues.push_back(jsonValue.asNumber());
+						else if (jsonValue.isArray())
+							value.numberValues = JsonArrayToNumbers(jsonValue);
+						layer.parameterValues[parameterItem.first] = value;
+					}
+				}
+			}
+
+			mLayers.push_back(layer);
+		}
+	}
+
+	return true;
+}
+
+JsonValue LayerStackStore::BuildPersistentStateValue(const ShaderPackageCatalog& shaderCatalog) const
+{
+	JsonValue root = JsonValue::MakeObject();
+	JsonValue layers = JsonValue::MakeArray();
+	for (const LayerPersistentState& layer : mLayers)
+	{
+		JsonValue layerValue = JsonValue::MakeObject();
+		layerValue.set("id", JsonValue(layer.id));
+		layerValue.set("shaderId", JsonValue(layer.shaderId));
+		layerValue.set("bypass", JsonValue(layer.bypass));
+
+		JsonValue parameterValues = JsonValue::MakeObject();
+		const ShaderPackage* shaderPackage = shaderCatalog.FindPackage(layer.shaderId);
+		for (const auto& parameterItem : layer.parameterValues)
+		{
+			const ShaderParameterDefinition* definition = nullptr;
+			if (shaderPackage)
+			{
+				for (const ShaderParameterDefinition& candidate : shaderPackage->parameters)
+				{
+					if (candidate.id == parameterItem.first)
+					{
+						definition = &candidate;
+						break;
+					}
+				}
+			}
+
+			if (definition)
+				parameterValues.set(parameterItem.first, RuntimeStateJson::SerializeParameterValue(*definition, parameterItem.second));
+		}
+
+		layerValue.set("parameterValues", parameterValues);
+		layers.pushBack(layerValue);
+	}
+	root.set("layers", layers);
+	return root;
+}
+
+void LayerStackStore::NormalizeLayerIds()
+{
+	std::set<std::string> usedIds;
+	uint64_t maxLayerNumber = mNextLayerId;
+
+	for (LayerPersistentState& layer : mLayers)
+	{
+		uint64_t layerNumber = 0;
+		const bool hasReusableId = !layer.id.empty() &&
+			usedIds.find(layer.id) == usedIds.end() &&
+			TryParseLayerIdNumber(layer.id, layerNumber);
+
+		if (hasReusableId)
+		{
+			usedIds.insert(layer.id);
+			maxLayerNumber = (std::max)(maxLayerNumber, layerNumber);
+			continue;
+		}
+
+		do
+		{
+			++maxLayerNumber;
+			layer.id = "layer-" + std::to_string(maxLayerNumber);
+		}
+		while (usedIds.find(layer.id) != usedIds.end());
+
+		usedIds.insert(layer.id);
+	}
+
+	mNextLayerId = maxLayerNumber;
+}
+
+void LayerStackStore::EnsureDefaultsForAllLayers(const ShaderPackageCatalog& shaderCatalog)
+{
+	for (LayerPersistentState& layer : mLayers)
+	{
+		const ShaderPackage* shaderPackage = shaderCatalog.FindPackage(layer.shaderId);
+		if (shaderPackage)
+			EnsureLayerDefaults(layer, *shaderPackage);
+	}
+}
+
+void LayerStackStore::EnsureDefaultLayer(const ShaderPackageCatalog& shaderCatalog)
+{
+	if (!mLayers.empty() || shaderCatalog.PackageOrder().empty())
+		return;
+
+	LayerPersistentState layer;
+	layer.id = GenerateLayerId(mLayers, mNextLayerId);
+	layer.shaderId = shaderCatalog.PackageOrder().front();
+	layer.bypass = false;
+	if (const ShaderPackage* shaderPackage = shaderCatalog.FindPackage(layer.shaderId))
+		EnsureLayerDefaults(layer, *shaderPackage);
+	mLayers.push_back(layer);
+}
+
+void LayerStackStore::RemoveLayersWithMissingPackages(const ShaderPackageCatalog& shaderCatalog)
+{
+	for (auto it = mLayers.begin(); it != mLayers.end();)
+	{
+		if (!shaderCatalog.HasPackage(it->shaderId))
+			it = mLayers.erase(it);
+		else
+			++it;
+	}
+}
+
+bool LayerStackStore::CreateLayer(const ShaderPackageCatalog& shaderCatalog, const std::string& shaderId, std::string& error)
+{
+	const ShaderPackage* shaderPackage = shaderCatalog.FindPackage(shaderId);
+	if (!shaderPackage)
+	{
+		error = "Unknown shader id: " + shaderId;
+		return false;
+	}
+
+	LayerPersistentState layer;
+	layer.id = GenerateLayerId(mLayers, mNextLayerId);
+	layer.shaderId = shaderId;
+	layer.bypass = false;
+	EnsureLayerDefaults(layer, *shaderPackage);
+	mLayers.push_back(layer);
+	return true;
+}
+
+bool LayerStackStore::DeleteLayer(const std::string& layerId, std::string& error)
+{
+	auto it = std::find_if(mLayers.begin(), mLayers.end(),
+		[&layerId](const LayerPersistentState& layer) { return layer.id == layerId; });
+	if (it == mLayers.end())
+	{
+		error = "Unknown layer id: " + layerId;
+		return false;
+	}
+
+	mLayers.erase(it);
+	return true;
+}
+
+bool LayerStackStore::MoveLayer(const std::string& layerId, int direction, std::string& error)
+{
+	auto it = std::find_if(mLayers.begin(), mLayers.end(),
+		[&layerId](const LayerPersistentState& layer) { return layer.id == layerId; });
+	if (it == mLayers.end())
+	{
+		error = "Unknown layer id: " + layerId;
+		return false;
+	}
+
+	const std::ptrdiff_t index = std::distance(mLayers.begin(), it);
+	const std::ptrdiff_t newIndex = index + direction;
+	if (newIndex < 0 || newIndex >= static_cast<std::ptrdiff_t>(mLayers.size()))
+		return true;
+
+	std::swap(mLayers[index], mLayers[newIndex]);
+	return true;
+}
+
+bool LayerStackStore::MoveLayerToIndex(const std::string& layerId, std::size_t targetIndex, std::string& error)
+{
+	auto it = std::find_if(mLayers.begin(), mLayers.end(),
+		[&layerId](const LayerPersistentState& layer) { return layer.id == layerId; });
+	if (it == mLayers.end())
+	{
+		error = "Unknown layer id: " + layerId;
+		return false;
+	}
+
+	if (mLayers.empty())
+		return true;
+
+	if (targetIndex >= mLayers.size())
+		targetIndex = mLayers.size() - 1;
+
+	const std::size_t sourceIndex = static_cast<std::size_t>(std::distance(mLayers.begin(), it));
+	if (sourceIndex == targetIndex)
+		return true;
+
+	LayerPersistentState movedLayer = *it;
+	mLayers.erase(mLayers.begin() + static_cast<std::ptrdiff_t>(sourceIndex));
+	mLayers.insert(mLayers.begin() + static_cast<std::ptrdiff_t>(targetIndex), movedLayer);
+	return true;
+}
+
+bool LayerStackStore::SetLayerBypassState(const std::string& layerId, bool bypassed, std::string& error)
+{
+	LayerPersistentState* layer = FindLayerById(layerId);
+	if (!layer)
+	{
+		error = "Unknown layer id: " + layerId;
+		return false;
+	}
+
+	layer->bypass = bypassed;
+	return true;
+}
+
+bool LayerStackStore::SetLayerShaderSelection(const ShaderPackageCatalog& shaderCatalog, const std::string& layerId, const std::string& shaderId, std::string& error)
+{
+	LayerPersistentState* layer = FindLayerById(layerId);
+	if (!layer)
+	{
+		error = "Unknown layer id: " + layerId;
+		return false;
+	}
+
+	const ShaderPackage* shaderPackage = shaderCatalog.FindPackage(shaderId);
+	if (!shaderPackage)
+	{
+		error = "Unknown shader id: " + shaderId;
+		return false;
+	}
+
+	layer->shaderId = shaderId;
+	layer->parameterValues.clear();
+	EnsureLayerDefaults(*layer, *shaderPackage);
+	return true;
+}
+
+bool LayerStackStore::SetParameterValue(const std::string& layerId, const std::string& parameterId, const ShaderParameterValue& value, std::string& error)
+{
+	LayerPersistentState* layer = FindLayerById(layerId);
+	if (!layer)
+	{
+		error = "Unknown layer id: " + layerId;
+		return false;
+	}
+
+	layer->parameterValues[parameterId] = value;
+	return true;
+}
+
+bool LayerStackStore::ResetLayerParameterValues(const ShaderPackageCatalog& shaderCatalog, const std::string& layerId, std::string& error)
+{
+	LayerPersistentState* layer = FindLayerById(layerId);
+	if (!layer)
+	{
+		error = "Unknown layer id: " + layerId;
+		return false;
+	}
+
+	const ShaderPackage* shaderPackage = shaderCatalog.FindPackage(layer->shaderId);
+	if (!shaderPackage)
+	{
+		error = "Unknown shader id: " + layer->shaderId;
+		return false;
+	}
+
+	layer->parameterValues.clear();
+	EnsureLayerDefaults(*layer, *shaderPackage);
+	return true;
+}
+
+bool LayerStackStore::HasLayer(const std::string& layerId) const
+{
+	return FindLayerById(layerId) != nullptr;
+}
+
+bool LayerStackStore::TryGetParameterById(const ShaderPackageCatalog& shaderCatalog, const std::string& layerId, const std::string& parameterId, StoredParameterSnapshot& snapshot, std::string& error) const
+{
+	const LayerPersistentState* layer = FindLayerById(layerId);
+	if (!layer)
+	{
+		error = "Unknown layer id: " + layerId;
+		return false;
+	}
+
+	const ShaderPackage* shaderPackage = shaderCatalog.FindPackage(layer->shaderId);
+	if (!shaderPackage)
+	{
+		error = "Unknown shader id: " + layer->shaderId;
+		return false;
+	}
+
+	auto parameterIt = std::find_if(shaderPackage->parameters.begin(), shaderPackage->parameters.end(),
+		[&parameterId](const ShaderParameterDefinition& definition) { return definition.id == parameterId; });
+	if (parameterIt == shaderPackage->parameters.end())
+	{
+		error = "Unknown parameter id: " + parameterId;
+		return false;
+	}
+
+	snapshot = StoredParameterSnapshot();
+	snapshot.layerId = layer->id;
+	snapshot.definition = *parameterIt;
+	auto valueIt = layer->parameterValues.find(parameterIt->id);
+	if (valueIt != layer->parameterValues.end())
+	{
+		snapshot.currentValue = valueIt->second;
+		snapshot.hasCurrentValue = true;
+	}
+	return true;
+}
+
+bool LayerStackStore::TryGetParameterByControlKey(const ShaderPackageCatalog& shaderCatalog, const std::string& layerKey, const std::string& parameterKey, StoredParameterSnapshot& snapshot, std::string& error) const
+{
+	const LayerPersistentState* matchedLayer = nullptr;
+	const ShaderPackage* matchedPackage = nullptr;
+
+	for (const LayerPersistentState& layer : mLayers)
+	{
+		const ShaderPackage* shaderPackage = shaderCatalog.FindPackage(layer.shaderId);
+		if (!shaderPackage)
+			continue;
+
+		if (MatchesControlKey(layer.id, layerKey) || MatchesControlKey(shaderPackage->id, layerKey) ||
+			MatchesControlKey(shaderPackage->displayName, layerKey))
+		{
+			matchedLayer = &layer;
+			matchedPackage = shaderPackage;
+			break;
+		}
+	}
+
+	if (!matchedLayer || !matchedPackage)
+	{
+		error = "Unknown OSC layer key: " + layerKey;
+		return false;
+	}
+
+	auto parameterIt = std::find_if(matchedPackage->parameters.begin(), matchedPackage->parameters.end(),
+		[&parameterKey](const ShaderParameterDefinition& definition)
+		{
+			return MatchesControlKey(definition.id, parameterKey) || MatchesControlKey(definition.label, parameterKey);
+		});
+	if (parameterIt == matchedPackage->parameters.end())
+	{
+		error = "Unknown OSC parameter key: " + parameterKey;
+		return false;
+	}
+
+	snapshot = StoredParameterSnapshot();
+	snapshot.layerId = matchedLayer->id;
+	snapshot.definition = *parameterIt;
+	auto valueIt = matchedLayer->parameterValues.find(parameterIt->id);
+	if (valueIt != matchedLayer->parameterValues.end())
+	{
+		snapshot.currentValue = valueIt->second;
+		snapshot.hasCurrentValue = true;
+	}
+	return true;
+}
+
+bool LayerStackStore::ResolveLayerMove(const std::string& layerId, int direction, bool& shouldMove, std::string& error) const
+{
+	auto it = std::find_if(mLayers.begin(), mLayers.end(),
+		[&layerId](const LayerPersistentState& layer) { return layer.id == layerId; });
+	if (it == mLayers.end())
+	{
+		error = "Unknown layer id: " + layerId;
+		return false;
+	}
+
+	const std::ptrdiff_t index = std::distance(mLayers.begin(), it);
+	const std::ptrdiff_t newIndex = index + direction;
+	shouldMove = newIndex >= 0 && newIndex < static_cast<std::ptrdiff_t>(mLayers.size()) && newIndex != index;
+	return true;
+}
+
+bool LayerStackStore::ResolveLayerMoveToIndex(const std::string& layerId, std::size_t targetIndex, bool& shouldMove, std::string& error) const
+{
+	auto it = std::find_if(mLayers.begin(), mLayers.end(),
+		[&layerId](const LayerPersistentState& layer) { return layer.id == layerId; });
+	if (it == mLayers.end())
+	{
+		error = "Unknown layer id: " + layerId;
+		return false;
+	}
+
+	if (mLayers.empty())
+	{
+		shouldMove = false;
+		return true;
+	}
+
+	const std::size_t clampedTargetIndex = (std::min)(targetIndex, mLayers.size() - 1);
+	const std::size_t sourceIndex = static_cast<std::size_t>(std::distance(mLayers.begin(), it));
+	shouldMove = sourceIndex != clampedTargetIndex;
+	return true;
+}
+
+JsonValue LayerStackStore::BuildStackPresetValue(const ShaderPackageCatalog& shaderCatalog, const std::string& presetName) const
+{
+	JsonValue root = JsonValue::MakeObject();
+	root.set("version", JsonValue(1.0));
+	root.set("name", JsonValue(TrimCopy(presetName)));
+	root.set("layers", RuntimeStateJson::SerializeLayerStack(*this, shaderCatalog));
+	return root;
+}
+
+bool LayerStackStore::LoadStackPresetValue(const ShaderPackageCatalog& shaderCatalog, const JsonValue& root, std::string& error)
+{
+	const JsonValue* layersValue = root.find("layers");
+	if (!layersValue || !layersValue->isArray())
+	{
+		error = "Preset file is missing a valid 'layers' array.";
+		return false;
+	}
+
+	std::vector<LayerPersistentState> nextLayers;
+	uint64_t nextLayerId = mNextLayerId;
+	if (!DeserializeLayerStack(shaderCatalog, *layersValue, nextLayers, nextLayerId, error))
+		return false;
+
+	if (nextLayers.empty())
+	{
+		error = "Preset does not contain any valid layers.";
+		return false;
+	}
+
+	mLayers = std::move(nextLayers);
+	mNextLayerId = nextLayerId;
+	return true;
+}
+
+std::string LayerStackStore::MakeSafePresetFileStem(const std::string& presetName)
+{
+	return ::MakeSafePresetFileStem(presetName);
+}
+
+const std::vector<LayerStackStore::LayerPersistentState>& LayerStackStore::Layers() const
+{
+	return mLayers;
+}
+
+std::vector<LayerStackStore::LayerPersistentState>& LayerStackStore::Layers()
+{
+	return mLayers;
+}
+
+std::size_t LayerStackStore::LayerCount() const
+{
+	return mLayers.size();
+}
+
+const LayerStackStore::LayerPersistentState* LayerStackStore::FindLayerById(const std::string& layerId) const
+{
+	auto it = std::find_if(mLayers.begin(), mLayers.end(),
+		[&layerId](const LayerPersistentState& layer) { return layer.id == layerId; });
+	return it == mLayers.end() ? nullptr : &*it;
+}
+
+LayerStackStore::LayerPersistentState* LayerStackStore::FindLayerById(const std::string& layerId)
+{
+	auto it = std::find_if(mLayers.begin(), mLayers.end(),
+		[&layerId](const LayerPersistentState& layer) { return layer.id == layerId; });
+	return it == mLayers.end() ? nullptr : &*it;
+}
+
+ShaderParameterValue LayerStackStore::DefaultValueForDefinition(const ShaderParameterDefinition& definition)
+{
+	return ::DefaultValueForDefinition(definition);
+}
+
+void LayerStackStore::EnsureLayerDefaults(LayerPersistentState& layerState, const ShaderPackage& shaderPackage)
+{
+	for (const ShaderParameterDefinition& definition : shaderPackage.parameters)
+	{
+		auto valueIt = layerState.parameterValues.find(definition.id);
+		if (valueIt == layerState.parameterValues.end())
+		{
+			layerState.parameterValues[definition.id] = DefaultValueForDefinition(definition);
+			continue;
+		}
+
+		JsonValue valueJson;
+		bool shouldNormalize = true;
+		switch (definition.type)
+		{
+		case ShaderParameterType::Float:
+			if (valueIt->second.numberValues.empty())
+				shouldNormalize = false;
+			else
+				valueJson = JsonValue(valueIt->second.numberValues.front());
+			break;
+		case ShaderParameterType::Vec2:
+		case ShaderParameterType::Color:
+			valueJson = JsonValue::MakeArray();
+			for (double number : valueIt->second.numberValues)
+				valueJson.pushBack(JsonValue(number));
+			break;
+		case ShaderParameterType::Boolean:
+			valueJson = JsonValue(valueIt->second.booleanValue);
+			break;
+		case ShaderParameterType::Enum:
+			valueJson = JsonValue(valueIt->second.enumValue);
+			break;
+		case ShaderParameterType::Text:
+		{
+			const std::string textValue = !valueIt->second.textValue.empty()
+				? valueIt->second.textValue
+				: valueIt->second.enumValue;
+			if (textValue.empty())
+			{
+				valueIt->second = DefaultValueForDefinition(definition);
+				shouldNormalize = false;
+			}
+			else
+			{
+				valueJson = JsonValue(textValue);
+			}
+			break;
+		}
+		case ShaderParameterType::Trigger:
+			if (valueIt->second.numberValues.empty())
+				valueJson = JsonValue(0.0);
+			else
+				valueJson = JsonValue((std::max)(0.0, std::floor(valueIt->second.numberValues.front())));
+			break;
+		}
+
+		if (!shouldNormalize)
+			continue;
+
+		ShaderParameterValue normalizedValue;
+		std::string normalizeError;
+		if (NormalizeAndValidateParameterValue(definition, valueJson, normalizedValue, normalizeError))
+			valueIt->second = normalizedValue;
+		else
+			valueIt->second = DefaultValueForDefinition(definition);
+	}
+}
+
+bool LayerStackStore::DeserializeLayerStack(const ShaderPackageCatalog& shaderCatalog, const JsonValue& layersValue, std::vector<LayerPersistentState>& layers, uint64_t& nextLayerId, std::string& error)
+{
+	for (const JsonValue& layerValue : layersValue.asArray())
+	{
+		if (!layerValue.isObject())
+			continue;
+
+		const JsonValue* shaderIdValue = layerValue.find("shaderId");
+		if (!shaderIdValue)
+			continue;
+
+		const std::string shaderId = shaderIdValue->asString();
+		const ShaderPackage* shaderPackage = shaderCatalog.FindPackage(shaderId);
+		if (!shaderPackage)
+		{
+			error = "Preset references unknown shader id: " + shaderId;
+			return false;
+		}
+
+		LayerPersistentState layer;
+		layer.id = GenerateLayerId(layers, nextLayerId);
+		layer.shaderId = shaderId;
+		if (const JsonValue* bypassValue = layerValue.find("bypass"))
+			layer.bypass = bypassValue->asBoolean(false);
+
+		if (const JsonValue* parametersValue = layerValue.find("parameters"))
+		{
+			for (const JsonValue& parameterValue : parametersValue->asArray())
+			{
+				if (!parameterValue.isObject())
+					continue;
+
+				const JsonValue* parameterIdValue = parameterValue.find("id");
+				const JsonValue* valueValue = parameterValue.find("value");
+				if (!parameterIdValue || !valueValue)
+					continue;
+
+				const std::string parameterId = parameterIdValue->asString();
+				auto definitionIt = std::find_if(shaderPackage->parameters.begin(), shaderPackage->parameters.end(),
+					[&parameterId](const ShaderParameterDefinition& definition) { return definition.id == parameterId; });
+				if (definitionIt == shaderPackage->parameters.end())
+					continue;
+
+				ShaderParameterValue normalizedValue;
+				if (!NormalizeAndValidateParameterValue(*definitionIt, *valueValue, normalizedValue, error))
+					return false;
+
+				layer.parameterValues[parameterId] = normalizedValue;
+			}
+		}
+
+		EnsureLayerDefaults(layer, *shaderPackage);
+		layers.push_back(layer);
+	}
+
+	return true;
+}
+
+std::string LayerStackStore::GenerateLayerId(std::vector<LayerPersistentState>& layers, uint64_t& nextLayerId)
+{
+	while (true)
+	{
+		++nextLayerId;
+		const std::string candidate = "layer-" + std::to_string(nextLayerId);
+		auto it = std::find_if(layers.begin(), layers.end(),
+			[&candidate](const LayerPersistentState& layer) { return layer.id == candidate; });
+		if (it == layers.end())
+			return candidate;
+	}
+}
--- a/apps/LoopThroughWithOpenGLCompositing/runtime/LayerStackStore.h
+++ b/apps/LoopThroughWithOpenGLCompositing/runtime/LayerStackStore.h
@@ -0,0 +1,72 @@
+#pragma once
+
+#include "RuntimeJson.h"
+#include "ShaderPackageCatalog.h"
+#include "ShaderTypes.h"
+
+#include <cstddef>
+#include <cstdint>
+#include <map>
+#include <string>
+#include <vector>
+
+class LayerStackStore
+{
+public:
+	struct LayerPersistentState
+	{
+		std::string id;
+		std::string shaderId;
+		bool bypass = false;
+		std::map<std::string, ShaderParameterValue> parameterValues;
+	};
+
+	struct StoredParameterSnapshot
+	{
+		std::string layerId;
+		ShaderParameterDefinition definition;
+		ShaderParameterValue currentValue;
+		bool hasCurrentValue = false;
+	};
+
+	bool LoadPersistentStateValue(const JsonValue& root);
+	JsonValue BuildPersistentStateValue(const ShaderPackageCatalog& shaderCatalog) const;
+	void NormalizeLayerIds();
+	void EnsureDefaultsForAllLayers(const ShaderPackageCatalog& shaderCatalog);
+	void EnsureDefaultLayer(const ShaderPackageCatalog& shaderCatalog);
+	void RemoveLayersWithMissingPackages(const ShaderPackageCatalog& shaderCatalog);
+
+	bool CreateLayer(const ShaderPackageCatalog& shaderCatalog, const std::string& shaderId, std::string& error);
+	bool DeleteLayer(const std::string& layerId, std::string& error);
+	bool MoveLayer(const std::string& layerId, int direction, std::string& error);
+	bool MoveLayerToIndex(const std::string& layerId, std::size_t targetIndex, std::string& error);
+	bool SetLayerBypassState(const std::string& layerId, bool bypassed, std::string& error);
+	bool SetLayerShaderSelection(const ShaderPackageCatalog& shaderCatalog, const std::string& layerId, const std::string& shaderId, std::string& error);
+	bool SetParameterValue(const std::string& layerId, const std::string& parameterId, const ShaderParameterValue& value, std::string& error);
+	bool ResetLayerParameterValues(const ShaderPackageCatalog& shaderCatalog, const std::string& layerId, std::string& error);
+
+	bool HasLayer(const std::string& layerId) const;
+	bool TryGetParameterById(const ShaderPackageCatalog& shaderCatalog, const std::string& layerId, const std::string& parameterId, StoredParameterSnapshot& snapshot, std::string& error) const;
+	bool TryGetParameterByControlKey(const ShaderPackageCatalog& shaderCatalog, const std::string& layerKey, const std::string& parameterKey, StoredParameterSnapshot& snapshot, std::string& error) const;
+	bool ResolveLayerMove(const std::string& layerId, int direction, bool& shouldMove, std::string& error) const;
+	bool ResolveLayerMoveToIndex(const std::string& layerId, std::size_t targetIndex, bool& shouldMove, std::string& error) const;
+
+	JsonValue BuildStackPresetValue(const ShaderPackageCatalog& shaderCatalog, const std::string& presetName) const;
+	bool LoadStackPresetValue(const ShaderPackageCatalog& shaderCatalog, const JsonValue& root, std::string& error);
+	static std::string MakeSafePresetFileStem(const std::string& presetName);
+
+	const std::vector<LayerPersistentState>& Layers() const;
+	std::vector<LayerPersistentState>& Layers();
+	std::size_t LayerCount() const;
+	const LayerPersistentState* FindLayerById(const std::string& layerId) const;
+	LayerPersistentState* FindLayerById(const std::string& layerId);
+
+private:
+	static ShaderParameterValue DefaultValueForDefinition(const ShaderParameterDefinition& definition);
+	static void EnsureLayerDefaults(LayerPersistentState& layerState, const ShaderPackage& shaderPackage);
+	static bool DeserializeLayerStack(const ShaderPackageCatalog& shaderCatalog, const JsonValue& layersValue, std::vector<LayerPersistentState>& layers, uint64_t& nextLayerId, std::string& error);
+	static std::string GenerateLayerId(std::vector<LayerPersistentState>& layers, uint64_t& nextLayerId);
+
+	std::vector<LayerPersistentState> mLayers;
+	uint64_t mNextLayerId = 0;
+};
--- a/apps/LoopThroughWithOpenGLCompositing/runtime/RenderSnapshotBuilder.cpp
+++ b/apps/LoopThroughWithOpenGLCompositing/runtime/RenderSnapshotBuilder.cpp
@@ -0,0 +1,208 @@
+#include "RenderSnapshotBuilder.h"
+
+#include "RuntimeClock.h"
+#include "RuntimeParameterUtils.h"
+#include "RuntimeStore.h"
+#include "ShaderCompiler.h"
+
+#include <algorithm>
+#include <chrono>
+#include <filesystem>
+#include <mutex>
+#include <utility>
+
+RenderSnapshotBuilder::RenderSnapshotBuilder(RuntimeStore& runtimeStore) :
+	mRuntimeStore(runtimeStore)
+{
+}
+
+bool RenderSnapshotBuilder::BuildLayerPassFragmentShaderSources(const std::string& layerId, std::vector<ShaderPassBuildSource>& passSources, std::string& error) const
+{
+	try
+	{
+		ShaderPackage shaderPackage;
+		if (!mRuntimeStore.CopyShaderPackageForStoredLayer(layerId, shaderPackage, error))
+			return false;
+
+		std::filesystem::path repoRoot;
+		std::filesystem::path wrapperPath;
+		std::filesystem::path generatedGlslPath;
+		std::filesystem::path patchedGlslPath;
+		unsigned maxTemporalHistoryFrames = 0;
+		mRuntimeStore.GetShaderCompilerInputs(repoRoot, wrapperPath, generatedGlslPath, patchedGlslPath, maxTemporalHistoryFrames);
+
+		ShaderCompiler compiler(
+			repoRoot,
+			wrapperPath,
+			generatedGlslPath,
+			patchedGlslPath,
+			maxTemporalHistoryFrames);
+		passSources.clear();
+		passSources.reserve(shaderPackage.passes.size());
+		for (const ShaderPassDefinition& pass : shaderPackage.passes)
+		{
+			ShaderPassBuildSource passSource;
+			passSource.passId = pass.id;
+			passSource.inputNames = pass.inputNames;
+			passSource.outputName = pass.outputName;
+			if (!compiler.BuildPassFragmentShaderSource(shaderPackage, pass, passSource.fragmentShaderSource, error))
+				return false;
+			passSources.push_back(std::move(passSource));
+		}
+		return true;
+	}
+	catch (const std::exception& exception)
+	{
+		error = std::string("RenderSnapshotBuilder::BuildLayerPassFragmentShaderSources exception: ") + exception.what();
+		return false;
+	}
+	catch (...)
+	{
+		error = "RenderSnapshotBuilder::BuildLayerPassFragmentShaderSources threw a non-standard exception.";
+		return false;
+	}
+}
+
+unsigned RenderSnapshotBuilder::GetMaxTemporalHistoryFrames() const
+{
+	return mRuntimeStore.GetConfiguredMaxTemporalHistoryFrames();
+}
+
+RuntimeSnapshotVersions RenderSnapshotBuilder::GetVersions() const
+{
+	RuntimeSnapshotVersions versions;
+	versions.renderStateVersion = mRenderStateVersion.load(std::memory_order_relaxed);
+	versions.parameterStateVersion = mParameterStateVersion.load(std::memory_order_relaxed);
+	return versions;
+}
+
+void RenderSnapshotBuilder::AdvanceFrame()
+{
+	++mFrameCounter;
+}
+
+void RenderSnapshotBuilder::BuildLayerRenderStates(unsigned outputWidth, unsigned outputHeight, std::vector<RuntimeRenderState>& states) const
+{
+	std::lock_guard<std::mutex> lock(mRuntimeStore.mMutex);
+	BuildLayerRenderStatesLocked(outputWidth, outputHeight, states);
+}
+
+bool RenderSnapshotBuilder::TryBuildLayerRenderStates(unsigned outputWidth, unsigned outputHeight, std::vector<RuntimeRenderState>& states) const
+{
+	std::unique_lock<std::mutex> lock(mRuntimeStore.mMutex, std::try_to_lock);
+	if (!lock.owns_lock())
+		return false;
+
+	BuildLayerRenderStatesLocked(outputWidth, outputHeight, states);
+	return true;
+}
+
+bool RenderSnapshotBuilder::TryRefreshLayerParameters(std::vector<RuntimeRenderState>& states) const
+{
+	std::unique_lock<std::mutex> lock(mRuntimeStore.mMutex, std::try_to_lock);
+	if (!lock.owns_lock())
+		return false;
+
+	RefreshLayerParametersLocked(states);
+	return true;
+}
+
+void RenderSnapshotBuilder::RefreshDynamicRenderStateFields(std::vector<RuntimeRenderState>& states) const
+{
+	std::lock_guard<std::mutex> lock(mRuntimeStore.mMutex);
+	RefreshDynamicRenderStateFieldsLocked(states);
+}
+
+void RenderSnapshotBuilder::MarkRenderStateDirty()
+{
+	mRenderStateVersion.fetch_add(1, std::memory_order_relaxed);
+	mParameterStateVersion.fetch_add(1, std::memory_order_relaxed);
+}
+
+void RenderSnapshotBuilder::MarkParameterStateDirty()
+{
+	mParameterStateVersion.fetch_add(1, std::memory_order_relaxed);
+}
+
+void RenderSnapshotBuilder::BuildLayerRenderStatesLocked(unsigned outputWidth, unsigned outputHeight, std::vector<RuntimeRenderState>& states) const
+{
+	states.clear();
+	const HealthTelemetry::SignalStatusSnapshot signalStatus = mRuntimeStore.mHealthTelemetry.GetSignalStatusSnapshot();
+
+	for (const RuntimeStore::LayerPersistentState& layer : mRuntimeStore.mLayerStack.Layers())
+	{
+		const ShaderPackage* shaderPackage = mRuntimeStore.mShaderCatalog.FindPackage(layer.shaderId);
+		if (!shaderPackage)
+			continue;
+
+		RuntimeRenderState state;
+		state.layerId = layer.id;
+		state.shaderId = layer.shaderId;
+		state.shaderName = shaderPackage->displayName;
+		state.mixAmount = 1.0;
+		state.bypass = layer.bypass ? 1.0 : 0.0;
+		state.inputWidth = signalStatus.width;
+		state.inputHeight = signalStatus.height;
+		state.outputWidth = outputWidth;
+		state.outputHeight = outputHeight;
+		state.parameterDefinitions = shaderPackage->parameters;
+		state.textureAssets = shaderPackage->textureAssets;
+		state.fontAssets = shaderPackage->fontAssets;
+		state.isTemporal = shaderPackage->temporal.enabled;
+		state.temporalHistorySource = shaderPackage->temporal.historySource;
+		state.requestedTemporalHistoryLength = shaderPackage->temporal.requestedHistoryLength;
+		state.effectiveTemporalHistoryLength = shaderPackage->temporal.effectiveHistoryLength;
+		state.feedback = shaderPackage->feedback;
+
+		for (const ShaderParameterDefinition& definition : shaderPackage->parameters)
+		{
+			ShaderParameterValue value = DefaultValueForDefinition(definition);
+			auto valueIt = layer.parameterValues.find(definition.id);
+			if (valueIt != layer.parameterValues.end())
+				value = valueIt->second;
+			state.parameterValues[definition.id] = value;
+		}
+
+		states.push_back(state);
+	}
+
+	RefreshDynamicRenderStateFieldsLocked(states);
+}
+
+void RenderSnapshotBuilder::RefreshLayerParametersLocked(std::vector<RuntimeRenderState>& states) const
+{
+	for (RuntimeRenderState& state : states)
+	{
+		const auto layerIt = std::find_if(mRuntimeStore.mLayerStack.Layers().begin(), mRuntimeStore.mLayerStack.Layers().end(),
+			[&state](const RuntimeStore::LayerPersistentState& layer) { return layer.id == state.layerId; });
+		if (layerIt == mRuntimeStore.mLayerStack.Layers().end())
+			continue;
+
+		state.bypass = layerIt->bypass ? 1.0 : 0.0;
+		state.parameterValues.clear();
+		for (const ShaderParameterDefinition& definition : state.parameterDefinitions)
+		{
+			ShaderParameterValue value = DefaultValueForDefinition(definition);
+			auto valueIt = layerIt->parameterValues.find(definition.id);
+			if (valueIt != layerIt->parameterValues.end())
+				value = valueIt->second;
+			state.parameterValues[definition.id] = value;
+		}
+	}
+}
+
+void RenderSnapshotBuilder::RefreshDynamicRenderStateFieldsLocked(std::vector<RuntimeRenderState>& states) const
+{
+	const RuntimeClockSnapshot clock = GetRuntimeClockSnapshot();
+	const double timeSeconds = std::chrono::duration_cast<std::chrono::duration<double>>(std::chrono::steady_clock::now() - mRuntimeStore.mStartTime).count();
+	const double frameCount = static_cast<double>(mFrameCounter.load(std::memory_order_relaxed));
+
+	for (RuntimeRenderState& state : states)
+	{
+		state.timeSeconds = timeSeconds;
+		state.utcTimeSeconds = clock.utcTimeSeconds;
+		state.utcOffsetSeconds = clock.utcOffsetSeconds;
+		state.startupRandom = mRuntimeStore.mStartupRandom;
+		state.frameCount = frameCount;
+	}
+}
--- a/apps/LoopThroughWithOpenGLCompositing/runtime/RenderSnapshotBuilder.h
+++ b/apps/LoopThroughWithOpenGLCompositing/runtime/RenderSnapshotBuilder.h
@@ -0,0 +1,43 @@
+#pragma once
+
+#include "ShaderTypes.h"
+
+#include <atomic>
+#include <cstdint>
+#include <string>
+#include <vector>
+
+class RuntimeStore;
+
+struct RuntimeSnapshotVersions
+{
+	uint64_t renderStateVersion = 0;
+	uint64_t parameterStateVersion = 0;
+};
+
+class RenderSnapshotBuilder
+{
+public:
+	explicit RenderSnapshotBuilder(RuntimeStore& runtimeStore);
+
+	bool BuildLayerPassFragmentShaderSources(const std::string& layerId, std::vector<ShaderPassBuildSource>& passSources, std::string& error) const;
+	unsigned GetMaxTemporalHistoryFrames() const;
+	RuntimeSnapshotVersions GetVersions() const;
+	void AdvanceFrame();
+	void BuildLayerRenderStates(unsigned outputWidth, unsigned outputHeight, std::vector<RuntimeRenderState>& states) const;
+	bool TryBuildLayerRenderStates(unsigned outputWidth, unsigned outputHeight, std::vector<RuntimeRenderState>& states) const;
+	bool TryRefreshLayerParameters(std::vector<RuntimeRenderState>& states) const;
+	void RefreshDynamicRenderStateFields(std::vector<RuntimeRenderState>& states) const;
+	void MarkRenderStateDirty();
+	void MarkParameterStateDirty();
+
+private:
+	void BuildLayerRenderStatesLocked(unsigned outputWidth, unsigned outputHeight, std::vector<RuntimeRenderState>& states) const;
+	void RefreshLayerParametersLocked(std::vector<RuntimeRenderState>& states) const;
+	void RefreshDynamicRenderStateFieldsLocked(std::vector<RuntimeRenderState>& states) const;
+
+	RuntimeStore& mRuntimeStore;
+	std::atomic<uint64_t> mFrameCounter{ 0 };
+	std::atomic<uint64_t> mRenderStateVersion{ 0 };
+	std::atomic<uint64_t> mParameterStateVersion{ 0 };
+};
--- a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeConfigStore.cpp
+++ b/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeConfigStore.cpp
@@ -0,0 +1,270 @@
+#include "RuntimeConfigStore.h"
+
+#include "RuntimeJson.h"
+
+#include <algorithm>
+#include <fstream>
+#include <sstream>
+#include <vector>
+#include <windows.h>
+
+namespace
+{
+double Clamp01(double value)
+{
+	return (std::max)(0.0, (std::min)(1.0, value));
+}
+
+bool LooksLikePackagedRuntimeRoot(const std::filesystem::path& candidate)
+{
+	return std::filesystem::exists(candidate / "config" / "runtime-host.json") &&
+		std::filesystem::exists(candidate / "runtime" / "templates" / "shader_wrapper.slang.in") &&
+		std::filesystem::exists(candidate / "shaders");
+}
+
+bool LooksLikeRepoRoot(const std::filesystem::path& candidate)
+{
+	return std::filesystem::exists(candidate / "CMakeLists.txt") &&
+		std::filesystem::exists(candidate / "apps" / "LoopThroughWithOpenGLCompositing");
+}
+
+std::filesystem::path FindRepoRootCandidate()
+{
+	std::vector<std::filesystem::path> rootsToTry;
+
+	char currentDirectory[MAX_PATH] = {};
+	if (GetCurrentDirectoryA(MAX_PATH, currentDirectory) > 0)
+		rootsToTry.push_back(std::filesystem::path(currentDirectory));
+
+	char modulePath[MAX_PATH] = {};
+	DWORD moduleLength = GetModuleFileNameA(NULL, modulePath, MAX_PATH);
+	if (moduleLength > 0 && moduleLength < MAX_PATH)
+		rootsToTry.push_back(std::filesystem::path(modulePath).parent_path());
+
+	for (const std::filesystem::path& startPath : rootsToTry)
+	{
+		std::filesystem::path candidate = startPath;
+		for (int depth = 0; depth < 10 && !candidate.empty(); ++depth)
+		{
+			if (LooksLikePackagedRuntimeRoot(candidate) || LooksLikeRepoRoot(candidate))
+				return candidate;
+
+			candidate = candidate.parent_path();
+		}
+	}
+
+	return std::filesystem::path();
+}
+}
+
+bool RuntimeConfigStore::Initialize(std::string& error)
+{
+	if (!ResolvePaths(error))
+		return false;
+	if (!LoadConfig(error))
+		return false;
+	RefreshConfigDependentPaths();
+	return true;
+}
+
+const RuntimeConfigStore::AppConfig& RuntimeConfigStore::GetConfig() const
+{
+	return mConfig;
+}
+
+const std::filesystem::path& RuntimeConfigStore::GetRepoRoot() const
+{
+	return mRepoRoot;
+}
+
+const std::filesystem::path& RuntimeConfigStore::GetUiRoot() const
+{
+	return mUiRoot;
+}
+
+const std::filesystem::path& RuntimeConfigStore::GetDocsRoot() const
+{
+	return mDocsRoot;
+}
+
+const std::filesystem::path& RuntimeConfigStore::GetShaderRoot() const
+{
+	return mShaderRoot;
+}
+
+const std::filesystem::path& RuntimeConfigStore::GetRuntimeRoot() const
+{
+	return mRuntimeRoot;
+}
+
+const std::filesystem::path& RuntimeConfigStore::GetPresetRoot() const
+{
+	return mPresetRoot;
+}
+
+const std::filesystem::path& RuntimeConfigStore::GetRuntimeStatePath() const
+{
+	return mRuntimeStatePath;
+}
+
+const std::filesystem::path& RuntimeConfigStore::GetWrapperPath() const
+{
+	return mWrapperPath;
+}
+
+const std::filesystem::path& RuntimeConfigStore::GetGeneratedGlslPath() const
+{
+	return mGeneratedGlslPath;
+}
+
+const std::filesystem::path& RuntimeConfigStore::GetPatchedGlslPath() const
+{
+	return mPatchedGlslPath;
+}
+
+void RuntimeConfigStore::SetBoundControlServerPort(unsigned short port)
+{
+	mConfig.serverPort = port;
+}
+
+bool RuntimeConfigStore::ResolvePaths(std::string& error)
+{
+	mRepoRoot = FindRepoRootCandidate();
+	if (mRepoRoot.empty())
+	{
+		error = "Could not locate the repository root from the current runtime path.";
+		return false;
+	}
+
+	const std::filesystem::path builtUiRoot = mRepoRoot / "ui" / "dist";
+	mUiRoot = std::filesystem::exists(builtUiRoot) ? builtUiRoot : (mRepoRoot / "ui");
+	mDocsRoot = mRepoRoot / "docs";
+	mConfigPath = mRepoRoot / "config" / "runtime-host.json";
+	mRuntimeRoot = mRepoRoot / "runtime";
+	mPresetRoot = mRuntimeRoot / "stack_presets";
+	mRuntimeStatePath = mRuntimeRoot / "runtime_state.json";
+	RefreshConfigDependentPaths();
+
+	std::error_code fsError;
+	std::filesystem::create_directories(mRuntimeRoot / "shader_cache", fsError);
+	std::filesystem::create_directories(mPresetRoot, fsError);
+	return true;
+}
+
+bool RuntimeConfigStore::LoadConfig(std::string& error)
+{
+	if (!std::filesystem::exists(mConfigPath))
+		return true;
+
+	std::string configText = ReadTextFile(mConfigPath, error);
+	if (configText.empty())
+		return false;
+
+	JsonValue configJson;
+	if (!ParseJson(configText, configJson, error))
+		return false;
+
+	if (const JsonValue* shaderLibraryValue = configJson.find("shaderLibrary"))
+		mConfig.shaderLibrary = shaderLibraryValue->asString();
+	if (const JsonValue* serverPortValue = configJson.find("serverPort"))
+		mConfig.serverPort = static_cast<unsigned short>(serverPortValue->asNumber(mConfig.serverPort));
+	if (const JsonValue* oscPortValue = configJson.find("oscPort"))
+		mConfig.oscPort = static_cast<unsigned short>(oscPortValue->asNumber(mConfig.oscPort));
+	if (const JsonValue* oscBindAddressValue = configJson.find("oscBindAddress"))
+		mConfig.oscBindAddress = oscBindAddressValue->asString();
+	if (const JsonValue* oscSmoothingValue = configJson.find("oscSmoothing"))
+		mConfig.oscSmoothing = Clamp01(oscSmoothingValue->asNumber(mConfig.oscSmoothing));
+	if (const JsonValue* autoReloadValue = configJson.find("autoReload"))
+		mConfig.autoReload = autoReloadValue->asBoolean(mConfig.autoReload);
+	if (const JsonValue* maxTemporalHistoryFramesValue = configJson.find("maxTemporalHistoryFrames"))
+	{
+		const double configuredValue = maxTemporalHistoryFramesValue->asNumber(static_cast<double>(mConfig.maxTemporalHistoryFrames));
+		mConfig.maxTemporalHistoryFrames = configuredValue <= 0.0 ? 0u : static_cast<unsigned>(configuredValue);
+	}
+	if (const JsonValue* previewFpsValue = configJson.find("previewFps"))
+	{
+		const double configuredValue = previewFpsValue->asNumber(static_cast<double>(mConfig.previewFps));
+		mConfig.previewFps = configuredValue <= 0.0 ? 0u : static_cast<unsigned>(configuredValue);
+	}
+	if (const JsonValue* enableExternalKeyingValue = configJson.find("enableExternalKeying"))
+		mConfig.enableExternalKeying = enableExternalKeyingValue->asBoolean(mConfig.enableExternalKeying);
+	if (const JsonValue* videoFormatValue = configJson.find("videoFormat"))
+	{
+		if (videoFormatValue->isString() && !videoFormatValue->asString().empty())
+		{
+			mConfig.inputVideoFormat = videoFormatValue->asString();
+			mConfig.outputVideoFormat = videoFormatValue->asString();
+		}
+	}
+	if (const JsonValue* frameRateValue = configJson.find("frameRate"))
+	{
+		if (frameRateValue->isString() && !frameRateValue->asString().empty())
+		{
+			mConfig.inputFrameRate = frameRateValue->asString();
+			mConfig.outputFrameRate = frameRateValue->asString();
+		}
+		else if (frameRateValue->isNumber())
+		{
+			std::ostringstream stream;
+			stream << frameRateValue->asNumber();
+			mConfig.inputFrameRate = stream.str();
+			mConfig.outputFrameRate = stream.str();
+		}
+	}
+	if (const JsonValue* inputVideoFormatValue = configJson.find("inputVideoFormat"))
+	{
+		if (inputVideoFormatValue->isString() && !inputVideoFormatValue->asString().empty())
+			mConfig.inputVideoFormat = inputVideoFormatValue->asString();
+	}
+	if (const JsonValue* inputFrameRateValue = configJson.find("inputFrameRate"))
+	{
+		if (inputFrameRateValue->isString() && !inputFrameRateValue->asString().empty())
+			mConfig.inputFrameRate = inputFrameRateValue->asString();
+		else if (inputFrameRateValue->isNumber())
+		{
+			std::ostringstream stream;
+			stream << inputFrameRateValue->asNumber();
+			mConfig.inputFrameRate = stream.str();
+		}
+	}
+	if (const JsonValue* outputVideoFormatValue = configJson.find("outputVideoFormat"))
+	{
+		if (outputVideoFormatValue->isString() && !outputVideoFormatValue->asString().empty())
+			mConfig.outputVideoFormat = outputVideoFormatValue->asString();
+	}
+	if (const JsonValue* outputFrameRateValue = configJson.find("outputFrameRate"))
+	{
+		if (outputFrameRateValue->isString() && !outputFrameRateValue->asString().empty())
+			mConfig.outputFrameRate = outputFrameRateValue->asString();
+		else if (outputFrameRateValue->isNumber())
+		{
+			std::ostringstream stream;
+			stream << outputFrameRateValue->asNumber();
+			mConfig.outputFrameRate = stream.str();
+		}
+	}
+
+	return true;
+}
+
+std::string RuntimeConfigStore::ReadTextFile(const std::filesystem::path& path, std::string& error) const
+{
+	std::ifstream input(path, std::ios::binary);
+	if (!input)
+	{
+		error = "Could not open file: " + path.string();
+		return std::string();
+	}
+
+	std::ostringstream buffer;
+	buffer << input.rdbuf();
+	return buffer.str();
+}
+
+void RuntimeConfigStore::RefreshConfigDependentPaths()
+{
+	mShaderRoot = mRepoRoot / mConfig.shaderLibrary;
+	mWrapperPath = mRuntimeRoot / "shader_cache" / "active_shader_wrapper.slang";
+	mGeneratedGlslPath = mRuntimeRoot / "shader_cache" / "active_shader.raw.frag";
+	mPatchedGlslPath = mRuntimeRoot / "shader_cache" / "active_shader.frag";
+}
--- a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeConfigStore.h
+++ b/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeConfigStore.h
@@ -0,0 +1,59 @@
+#pragma once
+
+#include <filesystem>
+#include <string>
+
+class RuntimeConfigStore
+{
+public:
+	struct AppConfig
+	{
+		std::string shaderLibrary = "shaders";
+		unsigned short serverPort = 8080;
+		unsigned short oscPort = 9000;
+		std::string oscBindAddress = "127.0.0.1";
+		double oscSmoothing = 0.18;
+		bool autoReload = true;
+		unsigned maxTemporalHistoryFrames = 4;
+		unsigned previewFps = 30;
+		bool enableExternalKeying = false;
+		std::string inputVideoFormat = "1080p";
+		std::string inputFrameRate = "59.94";
+		std::string outputVideoFormat = "1080p";
+		std::string outputFrameRate = "59.94";
+	};
+
+	bool Initialize(std::string& error);
+
+	const AppConfig& GetConfig() const;
+	const std::filesystem::path& GetRepoRoot() const;
+	const std::filesystem::path& GetUiRoot() const;
+	const std::filesystem::path& GetDocsRoot() const;
+	const std::filesystem::path& GetShaderRoot() const;
+	const std::filesystem::path& GetRuntimeRoot() const;
+	const std::filesystem::path& GetPresetRoot() const;
+	const std::filesystem::path& GetRuntimeStatePath() const;
+	const std::filesystem::path& GetWrapperPath() const;
+	const std::filesystem::path& GetGeneratedGlslPath() const;
+	const std::filesystem::path& GetPatchedGlslPath() const;
+	void SetBoundControlServerPort(unsigned short port);
+
+private:
+	bool ResolvePaths(std::string& error);
+	bool LoadConfig(std::string& error);
+	std::string ReadTextFile(const std::filesystem::path& path, std::string& error) const;
+	void RefreshConfigDependentPaths();
+
+	AppConfig mConfig;
+	std::filesystem::path mRepoRoot;
+	std::filesystem::path mUiRoot;
+	std::filesystem::path mDocsRoot;
+	std::filesystem::path mShaderRoot;
+	std::filesystem::path mRuntimeRoot;
+	std::filesystem::path mPresetRoot;
+	std::filesystem::path mRuntimeStatePath;
+	std::filesystem::path mConfigPath;
+	std::filesystem::path mWrapperPath;
+	std::filesystem::path mGeneratedGlslPath;
+	std::filesystem::path mPatchedGlslPath;
+};
--- a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeSnapshotProvider.cpp
+++ b/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeSnapshotProvider.cpp
@@ -1,12 +1,9 @@
 #include "RuntimeSnapshotProvider.h"

-#include "ShaderCompiler.h"
-
-#include <filesystem>
 #include <utility>

-RuntimeSnapshotProvider::RuntimeSnapshotProvider(RuntimeStore& runtimeStore) :
-	mRuntimeStore(runtimeStore)
+RuntimeSnapshotProvider::RuntimeSnapshotProvider(RenderSnapshotBuilder& renderSnapshotBuilder) :
+	mRenderSnapshotBuilder(renderSnapshotBuilder)
 {
 }

@@ -14,36 +11,7 @@ bool RuntimeSnapshotProvider::BuildLayerPassFragmentShaderSources(const std::str
 {
 	try
 	{
-		ShaderPackage shaderPackage;
-		if (!mRuntimeStore.CopyShaderPackageForStoredLayer(layerId, shaderPackage, error))
-			return false;
-
-		std::filesystem::path repoRoot;
-		std::filesystem::path wrapperPath;
-		std::filesystem::path generatedGlslPath;
-		std::filesystem::path patchedGlslPath;
-		unsigned maxTemporalHistoryFrames = 0;
-		mRuntimeStore.GetShaderCompilerInputs(repoRoot, wrapperPath, generatedGlslPath, patchedGlslPath, maxTemporalHistoryFrames);
-
-		ShaderCompiler compiler(
-			repoRoot,
-			wrapperPath,
-			generatedGlslPath,
-			patchedGlslPath,
-			maxTemporalHistoryFrames);
-		passSources.clear();
-		passSources.reserve(shaderPackage.passes.size());
-		for (const ShaderPassDefinition& pass : shaderPackage.passes)
-		{
-			ShaderPassBuildSource passSource;
-			passSource.passId = pass.id;
-			passSource.inputNames = pass.inputNames;
-			passSource.outputName = pass.outputName;
-			if (!compiler.BuildPassFragmentShaderSource(shaderPackage, pass, passSource.fragmentShaderSource, error))
-				return false;
-			passSources.push_back(std::move(passSource));
-		}
-		return true;
+		return mRenderSnapshotBuilder.BuildLayerPassFragmentShaderSources(layerId, passSources, error);
 	}
 	catch (const std::exception& exception)
 	{
@@ -59,20 +27,17 @@ bool RuntimeSnapshotProvider::BuildLayerPassFragmentShaderSources(const std::str

 unsigned RuntimeSnapshotProvider::GetMaxTemporalHistoryFrames() const
 {
-	return mRuntimeStore.GetConfiguredMaxTemporalHistoryFrames();
+	return mRenderSnapshotBuilder.GetMaxTemporalHistoryFrames();
 }

 RuntimeSnapshotVersions RuntimeSnapshotProvider::GetVersions() const
 {
-	RuntimeSnapshotVersions versions;
-	versions.renderStateVersion = mRuntimeStore.GetRenderStateVersion();
-	versions.parameterStateVersion = mRuntimeStore.GetParameterStateVersion();
-	return versions;
+	return mRenderSnapshotBuilder.GetVersions();
 }

 void RuntimeSnapshotProvider::AdvanceFrame()
 {
-	mRuntimeStore.AdvanceFrameCounter();
+	mRenderSnapshotBuilder.AdvanceFrame();
 }

 RuntimeRenderStateSnapshot RuntimeSnapshotProvider::PublishRenderStateSnapshot(unsigned outputWidth, unsigned outputHeight) const
@@ -87,7 +52,7 @@ RuntimeRenderStateSnapshot RuntimeSnapshotProvider::PublishRenderStateSnapshot(u
 		RuntimeRenderStateSnapshot snapshot;
 		snapshot.outputWidth = outputWidth;
 		snapshot.outputHeight = outputHeight;
-		mRuntimeStore.BuildLayerRenderStates(outputWidth, outputHeight, snapshot.states);
+		mRenderSnapshotBuilder.BuildLayerRenderStates(outputWidth, outputHeight, snapshot.states);

 		const RuntimeSnapshotVersions versionsAfter = GetVersions();
 		if (versionsBefore.renderStateVersion == versionsAfter.renderStateVersion &&
@@ -107,7 +72,7 @@ bool RuntimeSnapshotProvider::TryPublishRenderStateSnapshot(unsigned outputWidth
 		return true;

 	std::vector<RuntimeRenderState> states;
-	if (!mRuntimeStore.TryBuildLayerRenderStates(outputWidth, outputHeight, states))
+	if (!mRenderSnapshotBuilder.TryBuildLayerRenderStates(outputWidth, outputHeight, states))
 		return false;

 	const RuntimeSnapshotVersions versionsAfter = GetVersions();
@@ -128,7 +93,7 @@ bool RuntimeSnapshotProvider::TryPublishRenderStateSnapshot(unsigned outputWidth
 bool RuntimeSnapshotProvider::TryRefreshPublishedSnapshotParameters(RuntimeRenderStateSnapshot& snapshot) const
 {
 	const uint64_t expectedRenderStateVersion = snapshot.versions.renderStateVersion;
-	if (!mRuntimeStore.TryRefreshLayerParameters(snapshot.states))
+	if (!mRenderSnapshotBuilder.TryRefreshLayerParameters(snapshot.states))
 		return false;

 	const RuntimeSnapshotVersions versions = GetVersions();
@@ -142,7 +107,7 @@ bool RuntimeSnapshotProvider::TryRefreshPublishedSnapshotParameters(RuntimeRende

 void RuntimeSnapshotProvider::RefreshDynamicRenderStateFields(std::vector<RuntimeRenderState>& states) const
 {
-	mRuntimeStore.RefreshDynamicRenderStateFields(states);
+	mRenderSnapshotBuilder.RefreshDynamicRenderStateFields(states);
 }

 bool RuntimeSnapshotProvider::TryGetPublishedRenderStateSnapshot(unsigned outputWidth, unsigned outputHeight,
--- a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeSnapshotProvider.h
+++ b/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeSnapshotProvider.h
@@ -1,18 +1,11 @@
 #pragma once

-#include "RuntimeStore.h"
+#include "RenderSnapshotBuilder.h"

-#include <cstdint>
 #include <mutex>
 #include <string>
 #include <vector>

-struct RuntimeSnapshotVersions
-{
-	uint64_t renderStateVersion = 0;
-	uint64_t parameterStateVersion = 0;
-};
-
 struct RuntimeRenderStateSnapshot
 {
 	RuntimeSnapshotVersions versions;
@@ -24,7 +17,7 @@ struct RuntimeRenderStateSnapshot
 class RuntimeSnapshotProvider
 {
 public:
-	explicit RuntimeSnapshotProvider(RuntimeStore& runtimeStore);
+	explicit RuntimeSnapshotProvider(RenderSnapshotBuilder& renderSnapshotBuilder);

 	bool BuildLayerPassFragmentShaderSources(const std::string& layerId, std::vector<ShaderPassBuildSource>& passSources, std::string& error) const;
 	unsigned GetMaxTemporalHistoryFrames() const;
@@ -42,7 +35,7 @@ private:
 	static bool SnapshotMatches(const RuntimeRenderStateSnapshot& snapshot, unsigned outputWidth, unsigned outputHeight,
 		const RuntimeSnapshotVersions& versions);

-	RuntimeStore& mRuntimeStore;
+	RenderSnapshotBuilder& mRenderSnapshotBuilder;
 	mutable std::mutex mPublishedSnapshotMutex;
 	mutable bool mHasPublishedRenderStateSnapshot = false;
 	mutable RuntimeRenderStateSnapshot mPublishedRenderStateSnapshot;
--- a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStateJson.cpp
+++ b/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStateJson.cpp
@@ -0,0 +1,157 @@
+#include "RuntimeStateJson.h"
+
+#include "RuntimeParameterUtils.h"
+
+namespace
+{
+std::string ShaderParameterTypeToString(ShaderParameterType type)
+{
+	switch (type)
+	{
+	case ShaderParameterType::Float: return "float";
+	case ShaderParameterType::Vec2: return "vec2";
+	case ShaderParameterType::Color: return "color";
+	case ShaderParameterType::Boolean: return "bool";
+	case ShaderParameterType::Enum: return "enum";
+	case ShaderParameterType::Text: return "text";
+	case ShaderParameterType::Trigger: return "trigger";
+	}
+	return "unknown";
+}
+}
+
+JsonValue RuntimeStateJson::SerializeLayerStack(const LayerStackStore& layerStack, const ShaderPackageCatalog& shaderCatalog)
+{
+	JsonValue layers = JsonValue::MakeArray();
+	for (const LayerStackStore::LayerPersistentState& layer : layerStack.Layers())
+	{
+		const ShaderPackage* shaderPackage = shaderCatalog.FindPackage(layer.shaderId);
+		if (!shaderPackage)
+			continue;
+
+		JsonValue layerValue = JsonValue::MakeObject();
+		layerValue.set("id", JsonValue(layer.id));
+		layerValue.set("shaderId", JsonValue(layer.shaderId));
+		layerValue.set("shaderName", JsonValue(shaderPackage->displayName));
+		layerValue.set("bypass", JsonValue(layer.bypass));
+		if (shaderPackage->temporal.enabled)
+		{
+			JsonValue temporal = JsonValue::MakeObject();
+			temporal.set("enabled", JsonValue(true));
+			temporal.set("historySource", JsonValue(TemporalHistorySourceToString(shaderPackage->temporal.historySource)));
+			temporal.set("requestedHistoryLength", JsonValue(static_cast<double>(shaderPackage->temporal.requestedHistoryLength)));
+			temporal.set("effectiveHistoryLength", JsonValue(static_cast<double>(shaderPackage->temporal.effectiveHistoryLength)));
+			layerValue.set("temporal", temporal);
+		}
+		if (shaderPackage->feedback.enabled)
+		{
+			JsonValue feedback = JsonValue::MakeObject();
+			feedback.set("enabled", JsonValue(true));
+			feedback.set("writePass", JsonValue(shaderPackage->feedback.writePassId));
+			layerValue.set("feedback", feedback);
+		}
+
+		JsonValue parameters = JsonValue::MakeArray();
+		for (const ShaderParameterDefinition& definition : shaderPackage->parameters)
+		{
+			JsonValue parameter = JsonValue::MakeObject();
+			parameter.set("id", JsonValue(definition.id));
+			parameter.set("label", JsonValue(definition.label));
+			if (!definition.description.empty())
+				parameter.set("description", JsonValue(definition.description));
+			parameter.set("type", JsonValue(ShaderParameterTypeToString(definition.type)));
+			parameter.set("defaultValue", SerializeParameterValue(definition, DefaultValueForDefinition(definition)));
+
+			if (!definition.minNumbers.empty())
+			{
+				JsonValue minValue = JsonValue::MakeArray();
+				for (double number : definition.minNumbers)
+					minValue.pushBack(JsonValue(number));
+				parameter.set("min", minValue);
+			}
+			if (!definition.maxNumbers.empty())
+			{
+				JsonValue maxValue = JsonValue::MakeArray();
+				for (double number : definition.maxNumbers)
+					maxValue.pushBack(JsonValue(number));
+				parameter.set("max", maxValue);
+			}
+			if (!definition.stepNumbers.empty())
+			{
+				JsonValue stepValue = JsonValue::MakeArray();
+				for (double number : definition.stepNumbers)
+					stepValue.pushBack(JsonValue(number));
+				parameter.set("step", stepValue);
+			}
+			if (definition.type == ShaderParameterType::Enum)
+			{
+				JsonValue options = JsonValue::MakeArray();
+				for (const ShaderParameterOption& option : definition.enumOptions)
+				{
+					JsonValue optionValue = JsonValue::MakeObject();
+					optionValue.set("value", JsonValue(option.value));
+					optionValue.set("label", JsonValue(option.label));
+					options.pushBack(optionValue);
+				}
+				parameter.set("options", options);
+			}
+			if (definition.type == ShaderParameterType::Text)
+			{
+				parameter.set("maxLength", JsonValue(static_cast<double>(definition.maxLength)));
+				if (!definition.fontId.empty())
+					parameter.set("font", JsonValue(definition.fontId));
+			}
+
+			ShaderParameterValue value = DefaultValueForDefinition(definition);
+			auto valueIt = layer.parameterValues.find(definition.id);
+			if (valueIt != layer.parameterValues.end())
+				value = valueIt->second;
+			parameter.set("value", SerializeParameterValue(definition, value));
+			parameters.pushBack(parameter);
+		}
+
+		layerValue.set("parameters", parameters);
+		layers.pushBack(layerValue);
+	}
+	return layers;
+}
+
+JsonValue RuntimeStateJson::SerializeParameterValue(const ShaderParameterDefinition& definition, const ShaderParameterValue& value)
+{
+	switch (definition.type)
+	{
+	case ShaderParameterType::Boolean:
+		return JsonValue(value.booleanValue);
+	case ShaderParameterType::Enum:
+		return JsonValue(value.enumValue);
+	case ShaderParameterType::Text:
+		return JsonValue(value.textValue);
+	case ShaderParameterType::Trigger:
+		return JsonValue(value.numberValues.empty() ? 0.0 : value.numberValues.front());
+	case ShaderParameterType::Float:
+		return JsonValue(value.numberValues.empty() ? 0.0 : value.numberValues.front());
+	case ShaderParameterType::Vec2:
+	case ShaderParameterType::Color:
+	{
+		JsonValue array = JsonValue::MakeArray();
+		for (double number : value.numberValues)
+			array.pushBack(JsonValue(number));
+		return array;
+	}
+	}
+	return JsonValue();
+}
+
+std::string RuntimeStateJson::TemporalHistorySourceToString(TemporalHistorySource source)
+{
+	switch (source)
+	{
+	case TemporalHistorySource::Source:
+		return "source";
+	case TemporalHistorySource::PreLayerInput:
+		return "preLayerInput";
+	case TemporalHistorySource::None:
+	default:
+		return "none";
+	}
+}
--- a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStateJson.h
+++ b/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStateJson.h
@@ -0,0 +1,16 @@
+#pragma once
+
+#include "LayerStackStore.h"
+#include "RuntimeJson.h"
+#include "ShaderPackageCatalog.h"
+#include "ShaderTypes.h"
+
+#include <string>
+
+class RuntimeStateJson
+{
+public:
+	static JsonValue SerializeLayerStack(const LayerStackStore& layerStack, const ShaderPackageCatalog& shaderCatalog);
+	static JsonValue SerializeParameterValue(const ShaderParameterDefinition& definition, const ShaderParameterValue& value);
+	static std::string TemporalHistorySourceToString(TemporalHistorySource source);
+};
--- a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStatePresenter.cpp
+++ b/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStatePresenter.cpp
@@ -0,0 +1,125 @@
+#include "RuntimeStatePresenter.h"
+
+#include "RuntimeStateJson.h"
+#include "RuntimeStore.h"
+
+#include <mutex>
+
+std::string RuntimeStatePresenter::BuildRuntimeStateJson(const RuntimeStore& runtimeStore)
+{
+	return SerializeJson(BuildRuntimeStateValue(runtimeStore), true);
+}
+
+JsonValue RuntimeStatePresenter::BuildRuntimeStateValue(const RuntimeStore& runtimeStore)
+{
+	const HealthTelemetry::Snapshot telemetrySnapshot = runtimeStore.mHealthTelemetry.GetSnapshot();
+	std::lock_guard<std::mutex> lock(runtimeStore.mMutex);
+
+	JsonValue root = JsonValue::MakeObject();
+
+	JsonValue app = JsonValue::MakeObject();
+	app.set("serverPort", JsonValue(static_cast<double>(runtimeStore.mServerPort)));
+	app.set("oscPort", JsonValue(static_cast<double>(runtimeStore.mConfigStore.GetConfig().oscPort)));
+	app.set("oscBindAddress", JsonValue(runtimeStore.mConfigStore.GetConfig().oscBindAddress));
+	app.set("oscSmoothing", JsonValue(runtimeStore.mConfigStore.GetConfig().oscSmoothing));
+	app.set("autoReload", JsonValue(runtimeStore.mAutoReloadEnabled));
+	app.set("maxTemporalHistoryFrames", JsonValue(static_cast<double>(runtimeStore.mConfigStore.GetConfig().maxTemporalHistoryFrames)));
+	app.set("previewFps", JsonValue(static_cast<double>(runtimeStore.mConfigStore.GetConfig().previewFps)));
+	app.set("enableExternalKeying", JsonValue(runtimeStore.mConfigStore.GetConfig().enableExternalKeying));
+	app.set("inputVideoFormat", JsonValue(runtimeStore.mConfigStore.GetConfig().inputVideoFormat));
+	app.set("inputFrameRate", JsonValue(runtimeStore.mConfigStore.GetConfig().inputFrameRate));
+	app.set("outputVideoFormat", JsonValue(runtimeStore.mConfigStore.GetConfig().outputVideoFormat));
+	app.set("outputFrameRate", JsonValue(runtimeStore.mConfigStore.GetConfig().outputFrameRate));
+	root.set("app", app);
+
+	JsonValue runtime = JsonValue::MakeObject();
+	runtime.set("layerCount", JsonValue(static_cast<double>(runtimeStore.mLayerStack.LayerCount())));
+	runtime.set("compileSucceeded", JsonValue(runtimeStore.mCompileSucceeded));
+	runtime.set("compileMessage", JsonValue(runtimeStore.mCompileMessage));
+	root.set("runtime", runtime);
+
+	JsonValue video = JsonValue::MakeObject();
+	video.set("hasSignal", JsonValue(telemetrySnapshot.signal.hasSignal));
+	video.set("width", JsonValue(static_cast<double>(telemetrySnapshot.signal.width)));
+	video.set("height", JsonValue(static_cast<double>(telemetrySnapshot.signal.height)));
+	video.set("modeName", JsonValue(telemetrySnapshot.signal.modeName));
+	root.set("video", video);
+
+	JsonValue deckLink = JsonValue::MakeObject();
+	deckLink.set("modelName", JsonValue(telemetrySnapshot.videoIO.modelName));
+	deckLink.set("supportsInternalKeying", JsonValue(telemetrySnapshot.videoIO.supportsInternalKeying));
+	deckLink.set("supportsExternalKeying", JsonValue(telemetrySnapshot.videoIO.supportsExternalKeying));
+	deckLink.set("keyerInterfaceAvailable", JsonValue(telemetrySnapshot.videoIO.keyerInterfaceAvailable));
+	deckLink.set("externalKeyingRequested", JsonValue(telemetrySnapshot.videoIO.externalKeyingRequested));
+	deckLink.set("externalKeyingActive", JsonValue(telemetrySnapshot.videoIO.externalKeyingActive));
+	deckLink.set("statusMessage", JsonValue(telemetrySnapshot.videoIO.statusMessage));
+	root.set("decklink", deckLink);
+
+	JsonValue videoIO = JsonValue::MakeObject();
+	videoIO.set("backend", JsonValue(telemetrySnapshot.videoIO.backendName));
+	videoIO.set("modelName", JsonValue(telemetrySnapshot.videoIO.modelName));
+	videoIO.set("supportsInternalKeying", JsonValue(telemetrySnapshot.videoIO.supportsInternalKeying));
+	videoIO.set("supportsExternalKeying", JsonValue(telemetrySnapshot.videoIO.supportsExternalKeying));
+	videoIO.set("keyerInterfaceAvailable", JsonValue(telemetrySnapshot.videoIO.keyerInterfaceAvailable));
+	videoIO.set("externalKeyingRequested", JsonValue(telemetrySnapshot.videoIO.externalKeyingRequested));
+	videoIO.set("externalKeyingActive", JsonValue(telemetrySnapshot.videoIO.externalKeyingActive));
+	videoIO.set("statusMessage", JsonValue(telemetrySnapshot.videoIO.statusMessage));
+	root.set("videoIO", videoIO);
+
+	JsonValue performance = JsonValue::MakeObject();
+	performance.set("frameBudgetMs", JsonValue(telemetrySnapshot.performance.frameBudgetMilliseconds));
+	performance.set("renderMs", JsonValue(telemetrySnapshot.performance.renderMilliseconds));
+	performance.set("smoothedRenderMs", JsonValue(telemetrySnapshot.performance.smoothedRenderMilliseconds));
+	performance.set("budgetUsedPercent", JsonValue(
+		telemetrySnapshot.performance.frameBudgetMilliseconds > 0.0
+			? (telemetrySnapshot.performance.smoothedRenderMilliseconds / telemetrySnapshot.performance.frameBudgetMilliseconds) * 100.0
+			: 0.0));
+	performance.set("completionIntervalMs", JsonValue(telemetrySnapshot.performance.completionIntervalMilliseconds));
+	performance.set("smoothedCompletionIntervalMs", JsonValue(telemetrySnapshot.performance.smoothedCompletionIntervalMilliseconds));
+	performance.set("maxCompletionIntervalMs", JsonValue(telemetrySnapshot.performance.maxCompletionIntervalMilliseconds));
+	performance.set("lateFrameCount", JsonValue(static_cast<double>(telemetrySnapshot.performance.lateFrameCount)));
+	performance.set("droppedFrameCount", JsonValue(static_cast<double>(telemetrySnapshot.performance.droppedFrameCount)));
+	performance.set("flushedFrameCount", JsonValue(static_cast<double>(telemetrySnapshot.performance.flushedFrameCount)));
+	root.set("performance", performance);
+
+	JsonValue shaderLibrary = JsonValue::MakeArray();
+	for (const ShaderPackageStatus& status : runtimeStore.mShaderCatalog.PackageStatuses())
+	{
+		JsonValue shader = JsonValue::MakeObject();
+		shader.set("id", JsonValue(status.id));
+		shader.set("name", JsonValue(status.displayName));
+		shader.set("description", JsonValue(status.description));
+		shader.set("category", JsonValue(status.category));
+		shader.set("available", JsonValue(status.available));
+		if (!status.available)
+			shader.set("error", JsonValue(status.error));
+
+		const ShaderPackage* shaderPackage = runtimeStore.mShaderCatalog.FindPackage(status.id);
+		if (status.available && shaderPackage && shaderPackage->temporal.enabled)
+		{
+			JsonValue temporal = JsonValue::MakeObject();
+			temporal.set("enabled", JsonValue(true));
+			temporal.set("historySource", JsonValue(RuntimeStateJson::TemporalHistorySourceToString(shaderPackage->temporal.historySource)));
+			temporal.set("requestedHistoryLength", JsonValue(static_cast<double>(shaderPackage->temporal.requestedHistoryLength)));
+			temporal.set("effectiveHistoryLength", JsonValue(static_cast<double>(shaderPackage->temporal.effectiveHistoryLength)));
+			shader.set("temporal", temporal);
+		}
+		if (status.available && shaderPackage && shaderPackage->feedback.enabled)
+		{
+			JsonValue feedback = JsonValue::MakeObject();
+			feedback.set("enabled", JsonValue(true));
+			feedback.set("writePass", JsonValue(shaderPackage->feedback.writePassId));
+			shader.set("feedback", feedback);
+		}
+		shaderLibrary.pushBack(shader);
+	}
+	root.set("shaders", shaderLibrary);
+
+	JsonValue stackPresets = JsonValue::MakeArray();
+	for (const std::string& presetName : runtimeStore.GetStackPresetNamesLocked())
+		stackPresets.pushBack(JsonValue(presetName));
+	root.set("stackPresets", stackPresets);
+
+	root.set("layers", RuntimeStateJson::SerializeLayerStack(runtimeStore.mLayerStack, runtimeStore.mShaderCatalog));
+	return root;
+}
--- a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStatePresenter.h
+++ b/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStatePresenter.h
@@ -0,0 +1,14 @@
+#pragma once
+
+#include "RuntimeJson.h"
+
+#include <string>
+
+class RuntimeStore;
+
+class RuntimeStatePresenter
+{
+public:
+	static std::string BuildRuntimeStateJson(const RuntimeStore& runtimeStore);
+	static JsonValue BuildRuntimeStateValue(const RuntimeStore& runtimeStore);
+};
--- a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStore.cpp
+++ b/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStore.cpp
--- a/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStore.h
+++ b/apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeStore.h
@@ -1,64 +1,32 @@
 #pragma once

 #include "HealthTelemetry.h"
+#include "LayerStackStore.h"
+#include "RenderSnapshotBuilder.h"
+#include "RuntimeConfigStore.h"
 #include "RuntimeJson.h"
+#include "ShaderPackageCatalog.h"
 #include "ShaderTypes.h"

-#include <atomic>
 #include <chrono>
-#include <cstdint>
 #include <filesystem>
-#include <map>
 #include <mutex>
 #include <string>
 #include <vector>

-class RuntimeSnapshotProvider;
+class RuntimeStatePresenter;

 class RuntimeStore
 {
 public:
-	struct StoredParameterSnapshot
-	{
-		std::string layerId;
-		ShaderParameterDefinition definition;
-		ShaderParameterValue currentValue;
-		bool hasCurrentValue = false;
-	};
-
-	struct AppConfig
-	{
-		std::string shaderLibrary = "shaders";
-		unsigned short serverPort = 8080;
-		unsigned short oscPort = 9000;
-		std::string oscBindAddress = "127.0.0.1";
-		double oscSmoothing = 0.18;
-		bool autoReload = true;
-		unsigned maxTemporalHistoryFrames = 4;
-		unsigned previewFps = 30;
-		bool enableExternalKeying = false;
-		std::string inputVideoFormat = "1080p";
-		std::string inputFrameRate = "59.94";
-		std::string outputVideoFormat = "1080p";
-		std::string outputFrameRate = "59.94";
-	};
-
-	struct LayerPersistentState
-	{
-		std::string id;
-		std::string shaderId;
-		bool bypass = false;
-		std::map<std::string, ShaderParameterValue> parameterValues;
-	};
-
-	struct PersistentState
-	{
-		std::vector<LayerPersistentState> layers;
-	};
+	using StoredParameterSnapshot = LayerStackStore::StoredParameterSnapshot;
+	using LayerPersistentState = LayerStackStore::LayerPersistentState;

 	RuntimeStore();
 	HealthTelemetry& GetHealthTelemetry();
 	const HealthTelemetry& GetHealthTelemetry() const;
+	RenderSnapshotBuilder& GetRenderSnapshotBuilder();
+	const RenderSnapshotBuilder& GetRenderSnapshotBuilder() const;

 	bool InitializeStore(std::string& error);
 	std::string BuildPersistentStateJson() const;
@@ -104,66 +72,26 @@ public:
 	void ClearReloadRequest();

 private:
-	friend class RuntimeSnapshotProvider;
-	bool LoadConfig(std::string& error);
+	friend class RenderSnapshotBuilder;
+	friend class RuntimeStatePresenter;
 	bool LoadPersistentState(std::string& error);
 	bool SavePersistentState(std::string& error) const;
 	bool ScanShaderPackages(std::string& error);
 	std::string ReadTextFile(const std::filesystem::path& path, std::string& error) const;
 	bool WriteTextFile(const std::filesystem::path& path, const std::string& contents, std::string& error) const;
-	bool ResolvePaths(std::string& error);
 	std::vector<std::string> GetStackPresetNamesLocked() const;
-	std::string MakeSafePresetFileStem(const std::string& presetName) const;
-	bool TryResolveStoredLayerAndParameterByControlKeyLocked(const std::string& layerKey, const std::string& parameterKey,
-		const LayerPersistentState*& matchedLayer, const ShaderPackage*& matchedPackage,
-		std::vector<ShaderParameterDefinition>::const_iterator& parameterIt, std::string& error) const;
 	bool CopyShaderPackageForStoredLayer(const std::string& layerId, ShaderPackage& shaderPackage, std::string& error) const;
 	void GetShaderCompilerInputs(std::filesystem::path& repoRoot, std::filesystem::path& wrapperPath,
 		std::filesystem::path& generatedGlslPath, std::filesystem::path& patchedGlslPath, unsigned& maxTemporalHistoryFrames) const;
-	uint64_t GetRenderStateVersion() const;
-	uint64_t GetParameterStateVersion() const;
-	void AdvanceFrameCounter();
-	void BuildLayerRenderStates(unsigned outputWidth, unsigned outputHeight, std::vector<RuntimeRenderState>& states) const;
-	bool TryBuildLayerRenderStates(unsigned outputWidth, unsigned outputHeight, std::vector<RuntimeRenderState>& states) const;
-	bool TryRefreshLayerParameters(std::vector<RuntimeRenderState>& states) const;
-	void RefreshDynamicRenderStateFields(std::vector<RuntimeRenderState>& states) const;
-	void BuildLayerRenderStatesLocked(unsigned outputWidth, unsigned outputHeight, std::vector<RuntimeRenderState>& states) const;
-	void RefreshLayerParametersLocked(std::vector<RuntimeRenderState>& states) const;
-	void RefreshDynamicRenderStateFieldsLocked(std::vector<RuntimeRenderState>& states) const;
-	JsonValue BuildRuntimeStateValue() const;
-	JsonValue SerializeLayerStack() const;
-	bool NormalizeAndValidateValue(const ShaderParameterDefinition& definition, const JsonValue& value, ShaderParameterValue& normalizedValue, std::string& error) const;
-	ShaderParameterValue DefaultValueForDefinition(const ShaderParameterDefinition& definition) const;
-	void EnsureLayerDefaultsLocked(LayerPersistentState& layerState, const ShaderPackage& shaderPackage) const;
-	JsonValue SerializeLayerStackLocked() const;
-	bool DeserializeLayerStackLocked(const JsonValue& layersValue, std::vector<LayerPersistentState>& layers, std::string& error);
-	void NormalizePersistentLayerIdsLocked();
-	JsonValue SerializeParameterValue(const ShaderParameterDefinition& definition, const ShaderParameterValue& value) const;
-	std::string TemporalHistorySourceToString(TemporalHistorySource source) const;
-	LayerPersistentState* FindLayerById(const std::string& layerId);
-	const LayerPersistentState* FindLayerById(const std::string& layerId) const;
-	std::string GenerateLayerId();
 	void MarkRenderStateDirtyLocked();
 	void MarkParameterStateDirtyLocked();

+	RenderSnapshotBuilder mRenderSnapshotBuilder;
+	RuntimeConfigStore mConfigStore;
+	ShaderPackageCatalog mShaderCatalog;
+	LayerStackStore mLayerStack;
 	HealthTelemetry mHealthTelemetry;
 	mutable std::mutex mMutex;
-	AppConfig mConfig;
-	PersistentState mPersistentState;
-	std::filesystem::path mRepoRoot;
-	std::filesystem::path mUiRoot;
-	std::filesystem::path mDocsRoot;
-	std::filesystem::path mShaderRoot;
-	std::filesystem::path mRuntimeRoot;
-	std::filesystem::path mPresetRoot;
-	std::filesystem::path mRuntimeStatePath;
-	std::filesystem::path mConfigPath;
-	std::filesystem::path mWrapperPath;
-	std::filesystem::path mGeneratedGlslPath;
-	std::filesystem::path mPatchedGlslPath;
-	std::map<std::string, ShaderPackage> mPackagesById;
-	std::vector<std::string> mPackageOrder;
-	std::vector<ShaderPackageStatus> mPackageStatuses;
 	bool mReloadRequested;
 	bool mCompileSucceeded;
 	std::string mCompileMessage;
@@ -172,8 +100,4 @@ private:
 	bool mAutoReloadEnabled;
 	std::chrono::steady_clock::time_point mStartTime;
 	std::chrono::steady_clock::time_point mLastScanTime;
-	std::atomic<uint64_t> mFrameCounter{ 0 };
-	std::atomic<uint64_t> mRenderStateVersion{ 0 };
-	std::atomic<uint64_t> mParameterStateVersion{ 0 };
-	uint64_t mNextLayerId;
 };
--- a/apps/LoopThroughWithOpenGLCompositing/runtime/ShaderPackageCatalog.cpp
+++ b/apps/LoopThroughWithOpenGLCompositing/runtime/ShaderPackageCatalog.cpp
@@ -0,0 +1,127 @@
+#include "ShaderPackageCatalog.h"
+
+#include "ShaderPackageRegistry.h"
+
+bool ShaderPackageCatalog::Scan(const std::filesystem::path& shaderRoot, unsigned maxTemporalHistoryFrames, std::string& error)
+{
+	std::map<std::string, ShaderPackage> packagesById;
+	std::vector<std::string> packageOrder;
+	std::vector<ShaderPackageStatus> packageStatuses;
+
+	ShaderPackageRegistry registry(maxTemporalHistoryFrames);
+	if (!registry.Scan(shaderRoot, packagesById, packageOrder, packageStatuses, error))
+		return false;
+
+	mPackagesById.swap(packagesById);
+	mPackageOrder.swap(packageOrder);
+	mPackageStatuses.swap(packageStatuses);
+	return true;
+}
+
+ShaderPackageCatalog::Snapshot ShaderPackageCatalog::CaptureSnapshot() const
+{
+	Snapshot snapshot;
+	snapshot.packagesById = mPackagesById;
+	snapshot.packageOrder = mPackageOrder;
+	return snapshot;
+}
+
+bool ShaderPackageCatalog::HasCatalogChangedSince(const Snapshot& snapshot) const
+{
+	if (snapshot.packageOrder != mPackageOrder || snapshot.packagesById.size() != mPackagesById.size())
+		return true;
+
+	for (const auto& item : mPackagesById)
+	{
+		auto previous = snapshot.packagesById.find(item.first);
+		if (previous == snapshot.packagesById.end() || !PackagesEquivalent(previous->second, item.second))
+			return true;
+	}
+
+	return false;
+}
+
+bool ShaderPackageCatalog::HasPackageChangedSince(const Snapshot& snapshot, const std::string& shaderId) const
+{
+	auto previous = snapshot.packagesById.find(shaderId);
+	auto current = mPackagesById.find(shaderId);
+	if (previous == snapshot.packagesById.end() || current == mPackagesById.end())
+		return previous != snapshot.packagesById.end() || current != mPackagesById.end();
+
+	return !PackagesEquivalent(previous->second, current->second);
+}
+
+bool ShaderPackageCatalog::HasPackage(const std::string& shaderId) const
+{
+	return mPackagesById.find(shaderId) != mPackagesById.end();
+}
+
+const ShaderPackage* ShaderPackageCatalog::FindPackage(const std::string& shaderId) const
+{
+	auto it = mPackagesById.find(shaderId);
+	return it == mPackagesById.end() ? nullptr : &it->second;
+}
+
+bool ShaderPackageCatalog::CopyPackage(const std::string& shaderId, ShaderPackage& shaderPackage) const
+{
+	const ShaderPackage* package = FindPackage(shaderId);
+	if (!package)
+		return false;
+
+	shaderPackage = *package;
+	return true;
+}
+
+const std::vector<std::string>& ShaderPackageCatalog::PackageOrder() const
+{
+	return mPackageOrder;
+}
+
+const std::vector<ShaderPackageStatus>& ShaderPackageCatalog::PackageStatuses() const
+{
+	return mPackageStatuses;
+}
+
+bool ShaderPackageCatalog::PackagesEquivalent(const ShaderPackage& left, const ShaderPackage& right)
+{
+	return left.shaderWriteTime == right.shaderWriteTime &&
+		left.manifestWriteTime == right.manifestWriteTime &&
+		TextureAssetsEqual(left.textureAssets, right.textureAssets) &&
+		FontAssetsEqual(left.fontAssets, right.fontAssets);
+}
+
+bool ShaderPackageCatalog::TextureAssetsEqual(const std::vector<ShaderTextureAsset>& left, const std::vector<ShaderTextureAsset>& right)
+{
+	if (left.size() != right.size())
+		return false;
+
+	for (std::size_t index = 0; index < left.size(); ++index)
+	{
+		if (left[index].id != right[index].id ||
+			left[index].path != right[index].path ||
+			left[index].writeTime != right[index].writeTime)
+		{
+			return false;
+		}
+	}
+
+	return true;
+}
+
+bool ShaderPackageCatalog::FontAssetsEqual(const std::vector<ShaderFontAsset>& left, const std::vector<ShaderFontAsset>& right)
+{
+	if (left.size() != right.size())
+		return false;
+
+	for (std::size_t index = 0; index < left.size(); ++index)
+	{
+		if (left[index].id != right[index].id ||
+			left[index].path != right[index].path ||
+			left[index].writeTime != right[index].writeTime)
+		{
+			return false;
+		}
+	}
+
+	return true;
+}
--- a/apps/LoopThroughWithOpenGLCompositing/runtime/ShaderPackageCatalog.h
+++ b/apps/LoopThroughWithOpenGLCompositing/runtime/ShaderPackageCatalog.h
@@ -0,0 +1,37 @@
+#pragma once
+
+#include "ShaderTypes.h"
+
+#include <filesystem>
+#include <map>
+#include <string>
+#include <vector>
+
+class ShaderPackageCatalog
+{
+public:
+	struct Snapshot
+	{
+		std::map<std::string, ShaderPackage> packagesById;
+		std::vector<std::string> packageOrder;
+	};
+
+	bool Scan(const std::filesystem::path& shaderRoot, unsigned maxTemporalHistoryFrames, std::string& error);
+	Snapshot CaptureSnapshot() const;
+	bool HasCatalogChangedSince(const Snapshot& snapshot) const;
+	bool HasPackageChangedSince(const Snapshot& snapshot, const std::string& shaderId) const;
+	bool HasPackage(const std::string& shaderId) const;
+	const ShaderPackage* FindPackage(const std::string& shaderId) const;
+	bool CopyPackage(const std::string& shaderId, ShaderPackage& shaderPackage) const;
+	const std::vector<std::string>& PackageOrder() const;
+	const std::vector<ShaderPackageStatus>& PackageStatuses() const;
+
+private:
+	static bool PackagesEquivalent(const ShaderPackage& left, const ShaderPackage& right);
+	static bool TextureAssetsEqual(const std::vector<ShaderTextureAsset>& left, const std::vector<ShaderTextureAsset>& right);
+	static bool FontAssetsEqual(const std::vector<ShaderFontAsset>& left, const std::vector<ShaderFontAsset>& right);
+
+	std::map<std::string, ShaderPackage> mPackagesById;
+	std::vector<std::string> mPackageOrder;
+	std::vector<ShaderPackageStatus> mPackageStatuses;
+};
--- a/docs/PHASE_1_SUBSYSTEM_BOUNDARIES_DESIGN.md
+++ b/docs/PHASE_1_SUBSYSTEM_BOUNDARIES_DESIGN.md
@@ -102,12 +102,21 @@ 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)
+- `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)
+- `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)
 - `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)
 - `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)
+- `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)
 - `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)
@@ -124,15 +133,15 @@ The codebase now has an initial Phase 1 compatibility split in place:
 These are still compatibility seams, not a completed subsystem extraction. Some responsibilities have moved behind the new boundaries, while other paths still delegate through compatibility helpers, `OpenGLComposite`, `DeckLinkSession`, and the existing bridge/pipeline classes. Their purpose is to give later work real code boundaries that can be expanded without first inventing the names:

 - UI/runtime control calls in `OpenGLCompositeRuntimeControls.cpp` now route through `RuntimeCoordinator`
- runtime startup for path resolution, config load, persistent state load, and shader package scan now initializes through `RuntimeStore`
- runtime/UI state JSON composition now lives in `RuntimeStore` instead of `RuntimeHost`
- regular stored layer mutations and stack preset save/load now live in `RuntimeStore` instead of `RuntimeHost` public APIs
+- runtime startup now initializes path resolution and config loading through `RuntimeConfigStore`, with shader package scan and lookup delegated to `ShaderPackageCatalog`
+- runtime/UI state JSON composition now routes through `RuntimeStatePresenter` and `RuntimeStateJson` instead of living in `RuntimeHost` or `RuntimeStore`
+- regular stored layer mutations and stack preset save/load now route through `RuntimeStore` into `LayerStackStore` instead of `RuntimeHost` public APIs
 - persisted OSC-by-control-key commits now route through `RuntimeCoordinator` before applying store changes
 - mutation and reload policy now routes through `RuntimeCoordinator`
 - parameter target resolution, value normalization, trigger classification, and move no-op classification now live under `RuntimeCoordinator`
 - render-state and shader-build reads in `OpenGLComposite.cpp`, `OpenGLShaderPrograms.cpp`, and `ShaderBuildQueue.cpp` now route through `RuntimeSnapshotProvider`
- `RuntimeSnapshotProvider` now depends on `RuntimeStore` rather than sharing `RuntimeHost` directly
- render-state assembly, cached parameter refresh, and frame-context application now flow through `RuntimeSnapshotProvider` and store-owned snapshot helpers instead of `RuntimeHost` public APIs
+- `RuntimeSnapshotProvider` now depends on `RenderSnapshotBuilder` rather than on `RuntimeStore` friendship or shared `RuntimeHost` access
+- render-state assembly, cached parameter refresh, dynamic frame-field application, and render snapshot versions now live in `RenderSnapshotBuilder` instead of `RuntimeStore`
 - `RuntimeSnapshotProvider` now publishes versioned render snapshot objects and serves matching consumers from the last published snapshot
 - service ingress and polling coordination now route through `ControlServices`
 - `ControlServices` now queues coordinator results for OSC commit and file-poll outcomes instead of directly deciding runtime/store policy
@@ -140,6 +149,10 @@ These are still compatibility seams, not a completed subsystem extraction. Some
 - `HealthTelemetry` now owns the live signal, video-I/O, and performance snapshots directly instead of `RuntimeHost` keeping those backing fields
 - render-side frame advancement and render-performance reporting now flow through `RuntimeSnapshotProvider` and `HealthTelemetry` instead of directly through `RuntimeHost`
 - `RuntimeStore` now owns its durable/session backing fields directly instead of wrapping a compatibility `RuntimeHost` object
+- `RuntimeConfigStore` now owns runtime config parsing, path resolution, configured ports/formats, runtime roots, and shader compiler paths instead of leaving those responsibilities inside `RuntimeStore`
+- `ShaderPackageCatalog` now owns shader package scanning, package status/order/lookup, and package asset/source change comparison instead of leaving those responsibilities inside `RuntimeStore`
+- `LayerStackStore` now owns durable layer state, layer CRUD/reorder, parameter persistence, and stack preset value serialization/load instead of leaving those responsibilities inside `RuntimeStore`
+- `RuntimeStatePresenter` and `RuntimeStateJson` now own runtime-state JSON assembly and layer-stack presentation serialization instead of leaving those responsibilities inside storage classes
 - `RuntimeCoordinator` now uses explicit `RuntimeStore` query APIs/read models instead of friendship or direct store-internal access
 - live OSC overlay state and smoothing/commit decisions now live under `RenderEngine` instead of `OpenGLComposite`
 - coordinator result application, shader-build requests, ready-build application, and runtime-state broadcasts now route through `RuntimeUpdateController` instead of being interpreted directly by `OpenGLComposite`
@@ -346,7 +359,8 @@ Allowed dependency directions:
 - `RuntimeCoordinator -> RuntimeStore`
 - `RuntimeCoordinator -> RuntimeSnapshotProvider`
 - `RuntimeCoordinator -> HealthTelemetry`
- `RuntimeSnapshotProvider -> RuntimeStore`
+- `RuntimeSnapshotProvider -> RenderSnapshotBuilder`
+- `RenderSnapshotBuilder -> RuntimeStore`
 - `RenderEngine -> RuntimeSnapshotProvider`
 - `RenderEngine -> HealthTelemetry`
 - `VideoBackend -> RenderEngine`
@@ -574,7 +588,8 @@ Likely examples:

 - config loading/saving -> `RuntimeStore`
 - layer stack mutation validation -> `RuntimeCoordinator`
- render state building/versioning -> `RuntimeSnapshotProvider`
+- render state building/versioning -> `RenderSnapshotBuilder`
+- render snapshot publication/cache -> `RuntimeSnapshotProvider`
 - timing/status setters -> `HealthTelemetry`

 ### Current `RuntimeServices`
--- a/docs/subsystems/README.md
+++ b/docs/subsystems/README.md
@@ -42,11 +42,11 @@ That order mirrors the intended dependency story:
 ## Subsystem Notes

 - [RuntimeStore.md](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/docs/subsystems/RuntimeStore.md)
-  Durable runtime config, persisted layer state, presets, and package metadata ownership.
+  Durable runtime-state facade over layer-stack, config, package-catalog, presentation, and persistence boundaries.
 - [RuntimeCoordinator.md](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/docs/subsystems/RuntimeCoordinator.md)
  Mutation validation, state classification, reset/reload policy, and publication/persistence requests.
 - [RuntimeSnapshotProvider.md](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/docs/subsystems/RuntimeSnapshotProvider.md)
-  Render-facing snapshot build, publication, and versioning boundaries.
+  Render-facing snapshot publication boundary backed by explicit render snapshot building/versioning.
 - [ControlServices.md](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/docs/subsystems/ControlServices.md)
  OSC, HTTP/WebSocket, and file-watch ingress plus normalization and service-local buffering.
 - [RenderEngine.md](/c:/Users/Aiden/Documents/GitHub/video-shader-toys/docs/subsystems/RenderEngine.md)
--- a/docs/subsystems/RuntimeSnapshotProvider.md
+++ b/docs/subsystems/RuntimeSnapshotProvider.md
@@ -12,7 +12,7 @@ It exists to solve three current problems:

 - render state is still built directly out of `RuntimeHost` under a shared mutex
 - render reads and refreshes partially mutable cached layer state in more than one place
- state publication, state versioning, and dynamic frame-field refresh are not yet explicit subsystems
+- state publication, state versioning, and dynamic frame-field refresh need explicit ownership

 Today the closest current behavior lives in:

@@ -29,13 +29,17 @@ Today the closest current behavior lives in:

 `RuntimeSnapshotProvider` is responsible for:

- building render-facing snapshots from durable store state plus whatever committed-live state view the Phase 3 split ultimately exposes
 - publishing stable, versioned snapshots that can be consumed without large shared mutable locks
+- giving `RenderEngine` a cheap read path for the latest committed snapshot
+- making snapshot invalidation and publication rules explicit
+
+`RenderSnapshotBuilder` is responsible for:
+
+- building render-facing snapshots from durable store state plus whatever committed-live state view the Phase 3 split ultimately exposes
 - separating structural snapshot changes from dynamic frame fields
 - translating runtime layer state into render-ready layer descriptors
 - attaching immutable or near-immutable shader/package-derived data needed by render
- giving `RenderEngine` a cheap read path for the latest committed snapshot
- making snapshot invalidation and publication rules explicit
+- maintaining render snapshot version counters and frame advancement

 It is not responsible for:

@@ -75,7 +79,7 @@ The shape of render-facing layer state should remain consistent across phases ev

 ## Snapshot Inputs

-`RuntimeSnapshotProvider` should build from a read-oriented runtime view, not from direct mutation calls.
+`RenderSnapshotBuilder` should build from a read-oriented runtime view, not from direct mutation calls. `RuntimeSnapshotProvider` should consume the builder's output and own publication/cache behavior.

 That view will likely include:

@@ -87,7 +91,8 @@ That view will likely include:

 The important Phase 1 rule is not "the provider always reads one specific object." It is:

- the provider consumes read-oriented committed runtime state
+- the builder consumes read-oriented committed runtime state
+- the provider consumes builder-published render snapshot data
 - the provider does not own mutation policy
 - render consumes the provider's published output instead of reaching back into whichever runtime object currently stores the truth

@@ -292,11 +297,11 @@ Notes:

 ### `RuntimeStore`

-`RuntimeSnapshotProvider` depends on store-owned durable data and package metadata through a read-oriented interface or view.
+`RenderSnapshotBuilder` depends on store-owned durable data and package metadata through a read-oriented interface or view. `RuntimeSnapshotProvider` depends on the builder rather than reaching into store internals directly.

-If committed live state remains physically co-located with the store during early migration, the provider may read it through the same view. If committed live state moves behind a coordinator-owned live-session model later, the provider should consume that through a similarly read-oriented view.
+If committed live state remains physically co-located with the store during early migration, the builder may read it through the same view. If committed live state moves behind a coordinator-owned live-session model later, the builder should consume that through a similarly read-oriented view.

-It should not mutate the store directly.
+Neither the builder nor provider should mutate the store directly.

 ### `RuntimeCoordinator`

@@ -337,7 +342,7 @@ This is especially important while migrating away from the current lock/fallback

 The current code suggests the following migration map.

-### Move into `RuntimeSnapshotProvider`
+### Move into `RenderSnapshotBuilder`

 From `RuntimeHost`:

@@ -346,6 +351,12 @@ From `RuntimeHost`:
 - explicit version composition for render-visible state
 - dynamic frame-context construction currently done in `RefreshDynamicRenderStateFields(...)`

+### Move into `RuntimeSnapshotProvider`
+
+- published snapshot cache ownership
+- version matching for already-published snapshots
+- render-facing compatibility API while render callers migrate
+
 ### Stop exposing directly from the host/store boundary

 Current methods that should become compatibility shims and later disappear:
@@ -357,9 +368,9 @@ Current methods that should become compatibility shims and later disappear:

 ### Render-side compatibility during migration

-The current `OpenGLComposite` cache path:
+The previous `OpenGLComposite` cache path:

- reads versions from `RuntimeHost`
+- reads versions from `RuntimeHost`/store-owned counters
 - conditionally calls `TryRefreshCachedLayerStates(...)`
 - conditionally rebuilds full layer state
 - then reapplies render-local OSC overlay state
@@ -367,8 +378,8 @@ The current `OpenGLComposite` cache path:
 During migration, that should become:

 1. get latest published snapshot from provider
-2. compare snapshot versions against render-local cache
-3. rebuild only if needed
+2. compare snapshot versions produced by `RenderSnapshotBuilder`
+3. rebuild through `RenderSnapshotBuilder` only if needed
 4. apply render-local overlay state
 5. attach frame context

--- a/docs/subsystems/RuntimeStore.md
+++ b/docs/subsystems/RuntimeStore.md
@@ -276,7 +276,7 @@ Per the Phase 1 subsystem design, `RuntimeStore` should sit low in the dependenc
 Allowed inbound dependencies:

 - `RuntimeCoordinator -> RuntimeStore`
- `RuntimeSnapshotProvider -> RuntimeStore`
+- `RenderSnapshotBuilder -> RuntimeStore`
 - temporary migration shims from `ControlServices` only where explicitly tolerated

 Allowed outbound dependencies:
@@ -359,16 +359,33 @@ Those belong under other target subsystems.
 `RuntimeStore` does not need to be one monolithic class forever. A practical internal shape would be:

 - `RuntimeConfigStore`
-  - runtime host config load/save and resolved paths
- `PersistentLayerStore`
+  - runtime host config load and resolved paths
+
+The current codebase has begun this split: `RuntimeConfigStore` owns config parsing, path resolution, configured ports/formats, runtime roots, and shader compiler paths, while `RuntimeStore` keeps compatibility delegates for existing callers.
+- `LayerStackStore`
  - durable layer stack and parameter values
- `StackPresetStore`
-  - preset enumeration/load/save
- `ShaderPackageCatalogStore`
+  - layer CRUD/reorder and shader selection
+  - stack preset value serialization/load
+- `RuntimeStatePresenter` / `RuntimeStateJson`
+  - runtime-state JSON assembly
+  - layer-stack presentation serialization
+- `RenderSnapshotBuilder`
+  - render-state assembly and parameter refresh
+  - dynamic frame-field refresh and render snapshot version counters
+- `ShaderPackageCatalog`
  - durable manifest/package metadata
+  - shader package scanning, status/order/lookup, and asset/source change comparison
 - `PersistenceWriter` helper
  - synchronous at first, async/debounced later

+The current codebase has begun the layer split: `LayerStackStore` owns durable layer state, layer CRUD/reorder, parameter persistence, and stack preset value serialization/load. `RuntimeStore` still owns locking, file IO, and compatibility delegates for existing callers.
+
+The current codebase has begun the render snapshot split: `RenderSnapshotBuilder` owns render-state assembly, cached parameter refresh, dynamic frame-field refresh, and render snapshot versions. `RuntimeSnapshotProvider` depends on this builder rather than on `RuntimeStore` friendship.
+
+The current codebase has also begun the presentation split: `RuntimeStatePresenter` owns top-level runtime-state JSON assembly, while `RuntimeStateJson` owns the layer-stack and parameter presentation shape used by runtime state clients.
+
+The current codebase has also begun the package split: `ShaderPackageCatalog` owns package scanning and registry comparison, while `RuntimeStore` uses it to keep layer state valid and to build compatibility read models.
+
 These can still be presented through one subsystem façade during migration.

 ## Persistence Model