diff --git a/livekit/agent/livekit_agent_session.pb.go b/livekit/agent/livekit_agent_session.pb.go
index f7d9a8449..61d1d33c0 100644
--- a/livekit/agent/livekit_agent_session.pb.go
+++ b/livekit/agent/livekit_agent_session.pb.go
@@ -2860,6 +2860,7 @@ type AgentSessionEvent_UserInputTranscribed struct {
 	Transcript    string                 `protobuf:"bytes,1,opt,name=transcript,proto3" json:"transcript,omitempty"`
 	IsFinal       bool                   `protobuf:"varint,2,opt,name=is_final,json=isFinal,proto3" json:"is_final,omitempty"`
 	Language      *string                `protobuf:"bytes,3,opt,name=language,proto3,oneof" json:"language,omitempty"`
+	ItemId        string                 `protobuf:"bytes,4,opt,name=item_id,json=itemId,proto3" json:"item_id,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -2915,6 +2916,13 @@ func (x *AgentSessionEvent_UserInputTranscribed) GetLanguage() string {
 	return ""
 }
 
+func (x *AgentSessionEvent_UserInputTranscribed) GetItemId() string {
+	if x != nil {
+		return x.ItemId
+	}
+	return ""
+}
+
 type AgentSessionEvent_FunctionToolsStarted struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	FunctionCalls []*FunctionCall        `protobuf:"bytes,1,rep,name=function_calls,json=functionCalls,proto3" json:"function_calls,omitempty"`
diff --git a/protobufs/agent/livekit_agent_session.proto b/protobufs/agent/livekit_agent_session.proto
index 6b22b7650..6f54a547e 100644
--- a/protobufs/agent/livekit_agent_session.proto
+++ b/protobufs/agent/livekit_agent_session.proto
@@ -222,6 +222,7 @@ message AgentSessionEvent {
     string transcript = 1;
     bool is_final = 2;
     optional string language = 3;
+    string item_id = 4;
   }
 
   message FunctionToolsStarted {