Add bActive with smooth blend and auto-activation to all 3 AnimNode components

- Posture, FacialExpression, LipSync: bActive + ActivationBlendDuration for
  smooth alpha blend in/out (linear interp via FInterpConstantTo).
- Auto-activation: components bind to OnAgentConnected/OnAgentDisconnected,
  starting inactive and blending in when conversation begins.
- Without an agent component, bActive defaults to true (backward compatible).
- Add BlueprintFunctionLibrary with SetPostProcessAnimBlueprint helper
  (wraps UE5.5 SetOverridePostProcessAnimBP for per-instance BP setup).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/PS_AI_ConvAgent.uplugin

@@ -22,7 +22,8 @@
 			"PlatformAllowList": [
 				"Win64",
 				"Mac",
-				"Linux"
+				"Linux",
+				"Android"
 			]
 		},
 		{

Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Private/PS_AI_ConvAgent.cpp

@@ -46,13 +46,29 @@ void FPS_AI_ConvAgentModule::StartupModule()
 
 void FPS_AI_ConvAgentModule::EnsureSSLCertificates()
 {
-	const FString ProjectCertPath = FPaths::ProjectContentDir() / TEXT("Certificates") / TEXT("cacert.pem");
+	const FString CertRelPath = FString(TEXT("Certificates")) / TEXT("cacert.pem");
+	const FString ProjectCertPath = FPaths::ProjectContentDir() / CertRelPath;
+
+	// Check standard location (works on all platforms, including Android if cert was staged).
 	if (FPlatformFileManager::Get().GetPlatformFile().FileExists(*ProjectCertPath))
 	{
 		UE_LOG(LogPS_AI_ConvAgent, Log, TEXT("SSL cacert.pem found at: %s"), *ProjectCertPath);
 		return;
 	}
 
+#if PLATFORM_ANDROID
+	// On Android, ProjectContentDir lives inside the APK (read-only).
+	// Use ProjectSavedDir as a writable fallback for the cert copy.
+	const FString CopyDestPath = FPaths::ProjectSavedDir() / CertRelPath;
+	if (FPlatformFileManager::Get().GetPlatformFile().FileExists(*CopyDestPath))
+	{
+		UE_LOG(LogPS_AI_ConvAgent, Log, TEXT("SSL cacert.pem found at: %s"), *CopyDestPath);
+		return;
+	}
+#else
+	const FString CopyDestPath = ProjectCertPath;
+#endif
+
 	// Try to auto-copy from the plugin's Resources directory.
 	TSharedPtr<IPlugin> Plugin = IPluginManager::Get().FindPlugin(TEXT("PS_AI_ConvAgent"));
 	if (Plugin.IsValid())
@@ -63,10 +79,10 @@ void FPS_AI_ConvAgentModule::EnsureSSLCertificates()
 		if (FPlatformFileManager::Get().GetPlatformFile().FileExists(*PluginCertPath))
 		{
 			FPlatformFileManager::Get().GetPlatformFile().CreateDirectoryTree(
-				*(FPaths::ProjectContentDir() / TEXT("Certificates")));
+				*FPaths::GetPath(CopyDestPath));
-			if (FPlatformFileManager::Get().GetPlatformFile().CopyFile(*ProjectCertPath, *PluginCertPath))
+			if (FPlatformFileManager::Get().GetPlatformFile().CopyFile(*CopyDestPath, *PluginCertPath))
 			{
-				UE_LOG(LogPS_AI_ConvAgent, Log, TEXT("Copied SSL cacert.pem from plugin to: %s"), *ProjectCertPath);
+				UE_LOG(LogPS_AI_ConvAgent, Log, TEXT("Copied SSL cacert.pem from plugin to: %s"), *CopyDestPath);
 				return;
 			}
 		}

Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Private/PS_AI_ConvAgent_BlueprintLibrary.cpp

@@ -0,0 +1,17 @@
+// Copyright ASTERION. All Rights Reserved.
+
+#include "PS_AI_ConvAgent_BlueprintLibrary.h"
+#include "Components/SkeletalMeshComponent.h"
+
+void UPS_AI_ConvAgent_BlueprintLibrary::SetPostProcessAnimBlueprint(
+	USkeletalMeshComponent* SkelMeshComp,
+	TSubclassOf<UAnimInstance> AnimBPClass)
+{
+	if (!SkelMeshComp)
+	{
+		UE_LOG(LogTemp, Warning, TEXT("[PS_AI_ConvAgent] SetPostProcessAnimBlueprint: SkelMeshComp is null."));
+		return;
+	}
+
+	SkelMeshComp->SetOverridePostProcessAnimBP(AnimBPClass);
+}

Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Private/PS_AI_ConvAgent_FacialExpressionComponent.cpp

@@ -41,10 +41,19 @@ void UPS_AI_ConvAgent_FacialExpressionComponent::BeginPlay()
 		Agent->OnAgentEmotionChanged.AddDynamic(
 			this, &UPS_AI_ConvAgent_FacialExpressionComponent::OnEmotionChanged);
 
+		// Auto-activation: start inactive, activate when conversation connects.
+		Agent->OnAgentConnected.AddDynamic(
+			this, &UPS_AI_ConvAgent_FacialExpressionComponent::OnConversationConnected);
+		Agent->OnAgentDisconnected.AddDynamic(
+			this, &UPS_AI_ConvAgent_FacialExpressionComponent::OnConversationDisconnected);
+		bActive = false;
+		CurrentActiveAlpha = 0.0f;
+
 		if (bDebug)
 		{
 			UE_LOG(LogPS_AI_ConvAgent_FacialExpr, Log,
-				TEXT("Facial expression bound to agent component on %s."), *Owner->GetName());
+				TEXT("Facial expression bound to agent on %s. Waiting for conversation."),
+				*Owner->GetName());
 		}
 	}
 	else
@@ -80,6 +89,10 @@ void UPS_AI_ConvAgent_FacialExpressionComponent::EndPlay(const EEndPlayReason::T
 	{
 		AgentComponent->OnAgentEmotionChanged.RemoveDynamic(
 			this, &UPS_AI_ConvAgent_FacialExpressionComponent::OnEmotionChanged);
+		AgentComponent->OnAgentConnected.RemoveDynamic(
+			this, &UPS_AI_ConvAgent_FacialExpressionComponent::OnConversationConnected);
+		AgentComponent->OnAgentDisconnected.RemoveDynamic(
+			this, &UPS_AI_ConvAgent_FacialExpressionComponent::OnConversationDisconnected);
 	}
 
 	Super::EndPlay(EndPlayReason);
@@ -212,6 +225,31 @@ void UPS_AI_ConvAgent_FacialExpressionComponent::OnEmotionChanged(
 	}
 }
 
+// ─────────────────────────────────────────────────────────────────────────────
+// Auto-activation handlers
+// ─────────────────────────────────────────────────────────────────────────────
+
+void UPS_AI_ConvAgent_FacialExpressionComponent::OnConversationConnected(
+	const FPS_AI_ConvAgent_ConversationInfo_ElevenLabs& ConversationInfo)
+{
+	bActive = true;
+	if (bDebug)
+	{
+		UE_LOG(LogPS_AI_ConvAgent_FacialExpr, Log, TEXT("Conversation connected — facial expression activating."));
+	}
+}
+
+void UPS_AI_ConvAgent_FacialExpressionComponent::OnConversationDisconnected(
+	int32 StatusCode, const FString& Reason)
+{
+	bActive = false;
+	if (bDebug)
+	{
+		UE_LOG(LogPS_AI_ConvAgent_FacialExpr, Log,
+			TEXT("Conversation disconnected (code=%d) — facial expression deactivating."), StatusCode);
+	}
+}
+
 // ─────────────────────────────────────────────────────────────────────────────
 // Tick — play emotion animation and crossfade
 // ─────────────────────────────────────────────────────────────────────────────
@@ -237,6 +275,21 @@ void UPS_AI_ConvAgent_FacialExpressionComponent::TickComponent(
 		}
 	}
 
+	// ── Smooth activation blend ──────────────────────────────────────────
+	{
+		const float TargetAlpha = bActive ? 1.0f : 0.0f;
+		if (!FMath::IsNearlyEqual(CurrentActiveAlpha, TargetAlpha, 0.001f))
+		{
+			const float BlendSpeed = 1.0f / FMath::Max(ActivationBlendDuration, 0.01f);
+			CurrentActiveAlpha = FMath::FInterpConstantTo(
+				CurrentActiveAlpha, TargetAlpha, DeltaTime, BlendSpeed);
+		}
+		else
+		{
+			CurrentActiveAlpha = TargetAlpha;
+		}
+	}
+
 	// Nothing to play
 	if (!ActiveAnim && !PrevAnim)
 		return;
@@ -312,6 +365,19 @@ void UPS_AI_ConvAgent_FacialExpressionComponent::TickComponent(
 			}
 		}
 	}
+
+	// ── Apply activation alpha to output curves ──────────────────────────
+	if (CurrentActiveAlpha < 0.001f)
+	{
+		CurrentEmotionCurves.Reset();
+	}
+	else if (CurrentActiveAlpha < 0.999f)
+	{
+		for (auto& Pair : CurrentEmotionCurves)
+		{
+			Pair.Value *= CurrentActiveAlpha;
+		}
+	}
 }
 
 // ─────────────────────────────────────────────────────────────────────────────

Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Private/PS_AI_ConvAgent_LipSyncComponent.cpp

@@ -259,10 +259,19 @@ void UPS_AI_ConvAgent_LipSyncComponent::BeginPlay()
 		// Enable partial response streaming if not already enabled
 		Agent->bEnableAgentPartialResponse = true;
 
+		// Auto-activation: start inactive, activate when conversation connects.
+		Agent->OnAgentConnected.AddDynamic(
+			this, &UPS_AI_ConvAgent_LipSyncComponent::OnConversationConnected);
+		Agent->OnAgentDisconnected.AddDynamic(
+			this, &UPS_AI_ConvAgent_LipSyncComponent::OnConversationDisconnected);
+		bActive = false;
+		CurrentActiveAlpha = 0.0f;
+
 		if (bDebug)
 		{
 			UE_LOG(LogPS_AI_ConvAgent_LipSync, Log,
-				TEXT("Lip sync bound to agent component on %s (audio + text + interruption)."), *Owner->GetName());
+				TEXT("Lip sync bound to agent on %s. Waiting for conversation."),
+				*Owner->GetName());
 		}
 	}
 	else
@@ -634,6 +643,10 @@ void UPS_AI_ConvAgent_LipSyncComponent::EndPlay(const EEndPlayReason::Type EndPl
 			this, &UPS_AI_ConvAgent_LipSyncComponent::OnAgentInterrupted);
 		AgentComponent->OnAgentStoppedSpeaking.RemoveDynamic(
 			this, &UPS_AI_ConvAgent_LipSyncComponent::OnAgentStopped);
+		AgentComponent->OnAgentConnected.RemoveDynamic(
+			this, &UPS_AI_ConvAgent_LipSyncComponent::OnConversationConnected);
+		AgentComponent->OnAgentDisconnected.RemoveDynamic(
+			this, &UPS_AI_ConvAgent_LipSyncComponent::OnConversationDisconnected);
 	}
 	AgentComponent.Reset();
 	SpectrumAnalyzer.Reset();
@@ -641,6 +654,31 @@ void UPS_AI_ConvAgent_LipSyncComponent::EndPlay(const EEndPlayReason::Type EndPl
 	Super::EndPlay(EndPlayReason);
 }
 
+// ─────────────────────────────────────────────────────────────────────────────
+// Auto-activation handlers
+// ─────────────────────────────────────────────────────────────────────────────
+
+void UPS_AI_ConvAgent_LipSyncComponent::OnConversationConnected(
+	const FPS_AI_ConvAgent_ConversationInfo_ElevenLabs& ConversationInfo)
+{
+	bActive = true;
+	if (bDebug)
+	{
+		UE_LOG(LogPS_AI_ConvAgent_LipSync, Log, TEXT("Conversation connected — lip sync activating."));
+	}
+}
+
+void UPS_AI_ConvAgent_LipSyncComponent::OnConversationDisconnected(
+	int32 StatusCode, const FString& Reason)
+{
+	bActive = false;
+	if (bDebug)
+	{
+		UE_LOG(LogPS_AI_ConvAgent_LipSync, Log,
+			TEXT("Conversation disconnected (code=%d) — lip sync deactivating."), StatusCode);
+	}
+}
+
 // ─────────────────────────────────────────────────────────────────────────────
 // Tick — smooth visemes and apply morph targets
 // ─────────────────────────────────────────────────────────────────────────────
@@ -650,6 +688,21 @@ void UPS_AI_ConvAgent_LipSyncComponent::TickComponent(float DeltaTime, ELevelTic
 {
 	Super::TickComponent(DeltaTime, TickType, ThisTickFunction);
 
+	// ── Smooth activation blend ──────────────────────────────────────────
+	{
+		const float TargetAlpha = bActive ? 1.0f : 0.0f;
+		if (!FMath::IsNearlyEqual(CurrentActiveAlpha, TargetAlpha, 0.001f))
+		{
+			const float BlendSpeed = 1.0f / FMath::Max(ActivationBlendDuration, 0.01f);
+			CurrentActiveAlpha = FMath::FInterpConstantTo(
+				CurrentActiveAlpha, TargetAlpha, DeltaTime, BlendSpeed);
+		}
+		else
+		{
+			CurrentActiveAlpha = TargetAlpha;
+		}
+	}
+
 	// ── Lazy binding: in packaged builds, BeginPlay may run before the ────────
 	// ElevenLabsComponent is fully initialized. Retry discovery until bound.
 	if (!AgentComponent.IsValid())
@@ -977,6 +1030,19 @@ void UPS_AI_ConvAgent_LipSyncComponent::TickComponent(float DeltaTime, ELevelTic
 		PreviousBlendshapes = CurrentBlendshapes;
 	}
 
+	// ── Apply activation alpha to output blendshapes ─────────────────────
+	if (CurrentActiveAlpha < 0.001f)
+	{
+		CurrentBlendshapes.Reset();
+	}
+	else if (CurrentActiveAlpha < 0.999f)
+	{
+		for (auto& Pair : CurrentBlendshapes)
+		{
+			Pair.Value *= CurrentActiveAlpha;
+		}
+	}
+
 	// Auto-apply morph targets if a target mesh is set
 	if (TargetMesh)
 	{

Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Private/PS_AI_ConvAgent_PostureComponent.cpp

@@ -1,6 +1,7 @@
 // Copyright ASTERION. All Rights Reserved.
 
 #include "PS_AI_ConvAgent_PostureComponent.h"
+#include "PS_AI_ConvAgent_ElevenLabsComponent.h"
 #include "Components/SkeletalMeshComponent.h"
 #include "GameFramework/Actor.h"
 #include "Math/UnrealMathUtility.h"
@@ -106,6 +107,71 @@ void UPS_AI_ConvAgent_PostureComponent::BeginPlay()
 			*Owner->GetName(), MeshForwardYawOffset, OriginalActorYaw,
 			MaxEyeHorizontal, MaxEyeVertical, MaxHeadYaw, MaxHeadPitch);
 	}
+
+	// Auto-activation: bind to agent conversation lifecycle.
+	// When an agent component is found, start inactive and wait for conversation.
+	auto* Agent = Owner->FindComponentByClass<UPS_AI_ConvAgent_ElevenLabsComponent>();
+	if (Agent)
+	{
+		AgentComponent = Agent;
+		Agent->OnAgentConnected.AddDynamic(
+			this, &UPS_AI_ConvAgent_PostureComponent::OnConversationConnected);
+		Agent->OnAgentDisconnected.AddDynamic(
+			this, &UPS_AI_ConvAgent_PostureComponent::OnConversationDisconnected);
+
+		// Start inactive — will activate when conversation connects.
+		bActive = false;
+		CurrentActiveAlpha = 0.0f;
+
+		if (bDebug)
+		{
+			UE_LOG(LogPS_AI_ConvAgent_Posture, Log,
+				TEXT("Auto-activation bound to agent on %s. Waiting for conversation."),
+				*Owner->GetName());
+		}
+	}
+}
+
+// ─────────────────────────────────────────────────────────────────────────────
+// EndPlay
+// ─────────────────────────────────────────────────────────────────────────────
+
+void UPS_AI_ConvAgent_PostureComponent::EndPlay(const EEndPlayReason::Type EndPlayReason)
+{
+	if (AgentComponent.IsValid())
+	{
+		AgentComponent->OnAgentConnected.RemoveDynamic(
+			this, &UPS_AI_ConvAgent_PostureComponent::OnConversationConnected);
+		AgentComponent->OnAgentDisconnected.RemoveDynamic(
+			this, &UPS_AI_ConvAgent_PostureComponent::OnConversationDisconnected);
+	}
+
+	Super::EndPlay(EndPlayReason);
+}
+
+// ─────────────────────────────────────────────────────────────────────────────
+// Auto-activation handlers
+// ─────────────────────────────────────────────────────────────────────────────
+
+void UPS_AI_ConvAgent_PostureComponent::OnConversationConnected(
+	const FPS_AI_ConvAgent_ConversationInfo_ElevenLabs& ConversationInfo)
+{
+	bActive = true;
+	if (bDebug)
+	{
+		UE_LOG(LogPS_AI_ConvAgent_Posture, Log, TEXT("Conversation connected — posture activating."));
+	}
+}
+
+void UPS_AI_ConvAgent_PostureComponent::OnConversationDisconnected(
+	int32 StatusCode, const FString& Reason)
+{
+	bActive = false;
+	if (bDebug)
+	{
+		UE_LOG(LogPS_AI_ConvAgent_Posture, Log,
+			TEXT("Conversation disconnected (code=%d) — posture deactivating."), StatusCode);
+	}
 }
 
 // ─────────────────────────────────────────────────────────────────────────────
@@ -197,6 +263,21 @@ void UPS_AI_ConvAgent_PostureComponent::TickComponent(
 	// snapping in one frame.
 	const float SafeDeltaTime = FMath::Min(DeltaTime, 0.05f);
 
+	// ── Smooth activation blend ──────────────────────────────────────────
+	{
+		const float TargetAlpha = bActive ? 1.0f : 0.0f;
+		if (!FMath::IsNearlyEqual(CurrentActiveAlpha, TargetAlpha, 0.001f))
+		{
+			const float BlendSpeed = 1.0f / FMath::Max(ActivationBlendDuration, 0.01f);
+			CurrentActiveAlpha = FMath::FInterpConstantTo(
+				CurrentActiveAlpha, TargetAlpha, SafeDeltaTime, BlendSpeed);
+		}
+		else
+		{
+			CurrentActiveAlpha = TargetAlpha;
+		}
+	}
+
 	if (TargetActor)
 	{
 		// ── 1. Compute target position and eye origin ──────────────────────

Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Public/PS_AI_ConvAgent_BlueprintLibrary.h

@@ -0,0 +1,31 @@
+// Copyright ASTERION. All Rights Reserved.
+
+#pragma once
+
+#include "CoreMinimal.h"
+#include "Kismet/BlueprintFunctionLibrary.h"
+#include "PS_AI_ConvAgent_BlueprintLibrary.generated.h"
+
+class USkeletalMeshComponent;
+class UAnimInstance;
+
+// ─────────────────────────────────────────────────────────────────────────────
+// UPS_AI_ConvAgent_BlueprintLibrary
+//
+// Utility functions exposed to Blueprint for the PS AI ConvAgent plugin.
+// ─────────────────────────────────────────────────────────────────────────────
+UCLASS()
+class PS_AI_CONVAGENT_API UPS_AI_ConvAgent_BlueprintLibrary : public UBlueprintFunctionLibrary
+{
+	GENERATED_BODY()
+
+public:
+	/** Assign a Post Process Anim Blueprint to a Skeletal Mesh Component at runtime.
+	 *  This allows per-instance override without modifying the Skeletal Mesh asset.
+	 *  @param SkelMeshComp  The target Skeletal Mesh Component.
+	 *  @param AnimBPClass   The AnimBlueprint class to use as post-process (nullptr to clear). */
+	UFUNCTION(BlueprintCallable, Category = "PS AI ConvAgent|Utilities",
+		meta = (DisplayName = "Set Post Process Anim Blueprint"))
+	static void SetPostProcessAnimBlueprint(USkeletalMeshComponent* SkelMeshComp,
+		TSubclassOf<UAnimInstance> AnimBPClass);
+};

Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Public/PS_AI_ConvAgent_FacialExpressionComponent.h

@@ -47,6 +47,17 @@ public:
 		meta = (ToolTip = "Dedicated Emotion Pose Map asset.\nRight-click Content Browser → Miscellaneous → PS AI ConvAgent Emotion Pose Map."))
 	TObjectPtr<UPS_AI_ConvAgent_EmotionPoseMap> EmotionPoseMap;
 
+	/** When false, emotion curves smoothly blend to zero (passthrough).
+	 *  The underlying emotion playback keeps running so reactivation is seamless. */
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS AI ConvAgent|FacialExpression",
+		meta = (ToolTip = "Enable facial expressions.\nWhen false, outputs blend to zero (passthrough)."))
+	bool bActive = true;
+
+	/** How long (seconds) to blend in/out when bActive changes. */
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS AI ConvAgent|FacialExpression",
+		meta = (ClampMin = "0.05", ClampMax = "3.0"))
+	float ActivationBlendDuration = 0.5f;
+
 	/** Emotion crossfade duration in seconds. */
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS AI ConvAgent|FacialExpression",
 		meta = (ClampMin = "0.1", ClampMax = "3.0",
@@ -97,6 +108,14 @@ private:
 	UFUNCTION()
 	void OnEmotionChanged(EPS_AI_ConvAgent_Emotion Emotion, EPS_AI_ConvAgent_EmotionIntensity Intensity);
 
+	/** Automatically activate when conversation connects. */
+	UFUNCTION()
+	void OnConversationConnected(const FPS_AI_ConvAgent_ConversationInfo_ElevenLabs& ConversationInfo);
+
+	/** Automatically deactivate when conversation disconnects. */
+	UFUNCTION()
+	void OnConversationDisconnected(int32 StatusCode, const FString& Reason);
+
 	// ── Helpers ───────────────────────────────────────────────────────────────
 
 	/** Validate PoseMap emotion entries at BeginPlay. */
@@ -130,6 +149,9 @@ private:
 	/** Current blended emotion curves (evaluated each tick from playing anims). */
 	TMap<FName, float> CurrentEmotionCurves;
 
+	/** Current blend alpha (0 = fully inactive/passthrough, 1 = fully active). */
+	float CurrentActiveAlpha = 1.0f;
+
 	/** Active emotion (for change detection). */
 	EPS_AI_ConvAgent_Emotion ActiveEmotion = EPS_AI_ConvAgent_Emotion::Neutral;
 	EPS_AI_ConvAgent_EmotionIntensity ActiveEmotionIntensity = EPS_AI_ConvAgent_EmotionIntensity::Medium;

Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Public/PS_AI_ConvAgent_LipSyncComponent.h

@@ -5,6 +5,7 @@
 #include "CoreMinimal.h"
 #include "Components/ActorComponent.h"
 #include "DSP/SpectrumAnalyzer.h"
+#include "PS_AI_ConvAgent_Definitions.h"
 #include "PS_AI_ConvAgent_LipSyncComponent.generated.h"
 
 class UPS_AI_ConvAgent_ElevenLabsComponent;
@@ -56,6 +57,17 @@ public:
 		meta = (ToolTip = "Skeletal mesh to drive morph targets on.\nLeave empty to read values manually via GetCurrentBlendshapes()."))
 	TObjectPtr<USkeletalMeshComponent> TargetMesh;
 
+	/** When false, lip sync blendshapes smoothly blend to zero (passthrough).
+	 *  The underlying audio analysis keeps running so reactivation is seamless. */
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS AI ConvAgent|LipSync",
+		meta = (ToolTip = "Enable lip sync.\nWhen false, outputs blend to zero (passthrough)."))
+	bool bActive = true;
+
+	/** How long (seconds) to blend in/out when bActive changes. */
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS AI ConvAgent|LipSync",
+		meta = (ClampMin = "0.05", ClampMax = "3.0"))
+	float ActivationBlendDuration = 0.5f;
+
 	/** Overall mouth movement intensity multiplier. */
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS AI ConvAgent|LipSync",
 		meta = (ClampMin = "0.0", ClampMax = "3.0",
@@ -178,6 +190,14 @@ private:
 	UFUNCTION()
 	void OnAgentStopped();
 
+	/** Automatically activate when conversation connects. */
+	UFUNCTION()
+	void OnConversationConnected(const FPS_AI_ConvAgent_ConversationInfo_ElevenLabs& ConversationInfo);
+
+	/** Automatically deactivate when conversation disconnects. */
+	UFUNCTION()
+	void OnConversationDisconnected(int32 StatusCode, const FString& Reason);
+
 	/** Clear all lip sync queues and reset mouth to neutral pose. */
 	void ResetToNeutral();
 
@@ -234,6 +254,9 @@ private:
 	// to create continuous motion instead of 32ms step-wise jumps
 	TMap<FName, float> LastConsumedVisemes;
 
+	// Current blend alpha (0 = fully inactive/passthrough, 1 = fully active).
+	float CurrentActiveAlpha = 1.0f;
+
 	// MetaHuman mode: Face mesh has no morph targets, use animation curves instead.
 	// Set automatically in BeginPlay when TargetMesh has 0 morph targets.
 	bool bUseCurveMode = false;

Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Public/PS_AI_ConvAgent_PostureComponent.h

@@ -5,8 +5,10 @@
 #include "CoreMinimal.h"
 #include "Components/ActorComponent.h"
 #include "HAL/CriticalSection.h"
+#include "PS_AI_ConvAgent_Definitions.h"
 #include "PS_AI_ConvAgent_PostureComponent.generated.h"
 
+class UPS_AI_ConvAgent_ElevenLabsComponent;
 class USkeletalMeshComponent;
 
 DECLARE_LOG_CATEGORY_EXTERN(LogPS_AI_ConvAgent_Posture, Log, All);
@@ -73,6 +75,18 @@ public:
 		meta = (ToolTip = "Target actor to look at.\nSet to null to return to neutral."))
 	TObjectPtr<AActor> TargetActor;
 
+	/** When false, all posture outputs smoothly blend to neutral (passthrough).
+	 *  The underlying tracking keeps running so reactivation is seamless.
+	 *  Controlled automatically by the conversation state, or manually. */
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS AI ConvAgent|Posture",
+		meta = (ToolTip = "Enable posture system.\nWhen false, outputs blend to neutral (passthrough)."))
+	bool bActive = true;
+
+	/** How long (seconds) to blend in/out when bActive changes. */
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS AI ConvAgent|Posture",
+		meta = (ClampMin = "0.05", ClampMax = "3.0"))
+	float ActivationBlendDuration = 0.5f;
+
 	/** When false, body rotation is frozen — only head and eyes track the target.
 	 *  Useful to have the agent notice the player (eyes+head) before fully engaging (body). */
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS AI ConvAgent|Posture",
@@ -218,21 +232,27 @@ public:
 	// ── Getters (read by AnimNode) ───────────────────────────────────────────
 
 	/** Get current eye gaze curves (8 ARKit eye look curves).
-	 *  Returns a COPY — safe to call from any thread. */
+	 *  Returns a COPY scaled by activation alpha — safe to call from any thread. */
 	UFUNCTION(BlueprintCallable, Category = "PS AI ConvAgent|Posture")
 	TMap<FName, float> GetCurrentEyeCurves() const
 	{
 		FScopeLock Lock(&PostureDataLock);
-		return CurrentEyeCurves;
+		if (CurrentActiveAlpha < 0.001f) return TMap<FName, float>();
+		if (CurrentActiveAlpha >= 0.999f) return CurrentEyeCurves;
+		TMap<FName, float> Scaled = CurrentEyeCurves;
+		for (auto& Pair : Scaled) { Pair.Value *= CurrentActiveAlpha; }
+		return Scaled;
 	}
 
 	/** Get current head rotation offset (applied by AnimNode as FQuat to avoid
 	 *  Euler round-trip that reintroduces parasitic tilt on diagonals).
-	 *  Thread-safe copy. */
+	 *  Thread-safe copy, blended by activation alpha. */
 	FQuat GetCurrentHeadRotation() const
 	{
 		FScopeLock Lock(&PostureDataLock);
-		return CurrentHeadRotation;
+		if (CurrentActiveAlpha < 0.001f) return FQuat::Identity;
+		if (CurrentActiveAlpha >= 0.999f) return CurrentHeadRotation;
+		return FQuat::Slerp(FQuat::Identity, CurrentHeadRotation, CurrentActiveAlpha);
 	}
 
 	/** Get the head bone name (used by AnimNode to resolve bone index). */
@@ -241,21 +261,35 @@ public:
 	/** Get the neck bone chain (used by AnimNode to resolve bone indices). */
 	const TArray<FPS_AI_ConvAgent_NeckBoneEntry>& GetNeckBoneChain() const { return NeckBoneChain; }
 
-	/** Get head animation compensation factor (0 = additive, 1 = full override). */
+	/** Get head animation compensation factor (0 = additive, 1 = full override).
-	float GetHeadAnimationCompensation() const { return HeadAnimationCompensation; }
+	 *  Scaled by activation alpha for smooth passthrough when inactive. */
+	float GetHeadAnimationCompensation() const { return HeadAnimationCompensation * CurrentActiveAlpha; }
 
-	/** Get eye animation compensation factor (0 = additive, 1 = full override). */
+	/** Get eye animation compensation factor (0 = additive, 1 = full override).
-	float GetEyeAnimationCompensation() const { return EyeAnimationCompensation; }
+	 *  Scaled by activation alpha for smooth passthrough when inactive. */
+	float GetEyeAnimationCompensation() const { return EyeAnimationCompensation * CurrentActiveAlpha; }
 
-	/** Get body drift compensation factor (0 = none, 1 = full). */
+	/** Get body drift compensation factor (0 = none, 1 = full).
-	float GetBodyDriftCompensation() const { return BodyDriftCompensation; }
+	 *  Scaled by activation alpha for smooth passthrough when inactive. */
+	float GetBodyDriftCompensation() const { return BodyDriftCompensation * CurrentActiveAlpha; }
 
 	// ── UActorComponent overrides ────────────────────────────────────────────
 	virtual void BeginPlay() override;
+	virtual void EndPlay(const EEndPlayReason::Type EndPlayReason) override;
 	virtual void TickComponent(float DeltaTime, ELevelTick TickType,
 		FActorComponentTickFunction* ThisTickFunction) override;
 
 private:
+	// ── Event handlers ────────────────────────────────────────────────────────
+
+	/** Automatically activate when conversation connects. */
+	UFUNCTION()
+	void OnConversationConnected(const FPS_AI_ConvAgent_ConversationInfo_ElevenLabs& ConversationInfo);
+
+	/** Automatically deactivate when conversation disconnects. */
+	UFUNCTION()
+	void OnConversationDisconnected(int32 StatusCode, const FString& Reason);
+
 	// ── Internals ────────────────────────────────────────────────────────────
 
 	/** Map eye yaw/pitch angles to 8 ARKit eye curves. */
@@ -263,6 +297,9 @@ private:
 
 	// ── Smoothed current values (head + eyes, body is actor yaw) ────────────
 
+	/** Current blend alpha (0 = fully inactive/passthrough, 1 = fully active). */
+	float CurrentActiveAlpha = 1.0f;
+
 	float CurrentHeadYaw = 0.0f;
 	float CurrentHeadPitch = 0.0f;
 	float CurrentEyeYaw = 0.0f;
@@ -302,6 +339,9 @@ private:
 	/** Cached Face skeletal mesh component (for eye bone transforms). */
 	TWeakObjectPtr<USkeletalMeshComponent> CachedFaceMesh;
 
+	/** Cached reference to the agent component for auto-activation. */
+	TWeakObjectPtr<UPS_AI_ConvAgent_ElevenLabsComponent> AgentComponent;
+
 #if !UE_BUILD_SHIPPING
 	/** Frame counter for periodic debug logging. */
 	int32 DebugFrameCounter = 0;