diff --git a/connections/implementation/proto/offline_wire_formats.proto b/connections/implementation/proto/offline_wire_formats.proto
index 3280459b..018d4e18 100644
--- a/connections/implementation/proto/offline_wire_formats.proto
+++ b/connections/implementation/proto/offline_wire_formats.proto
@@ -46,6 +46,7 @@ message V1Frame {
     AUTHENTICATION_MESSAGE = 8;
     AUTHENTICATION_RESULT = 9;
     AUTO_RESUME = 10;
+    AUTO_RECONNECT = 11;
   }
   optional FrameType type = 1;
 
@@ -60,6 +61,7 @@ message V1Frame {
   optional AuthenticationMessageFrame authentication_message = 9;
   optional AuthenticationResultFrame authentication_result = 10;
   optional AutoResumeFrame auto_resume = 11;
+  optional AutoReconnectFrame auto_reconnect = 12;
 }
 
 message ConnectionRequestFrame {
@@ -357,6 +359,16 @@ message AutoResumeFrame {
   optional int32 next_payload_chunk_index = 3;
 }
 
+message AutoReconnectFrame {
+  enum EventType {
+    UNKNOWN_EVENT_TYPE = 0;
+    CLIENT_INTRODUCTION = 1;
+    CLIENT_INTRODUCTION_ACK = 2;
+  }
+  optional string endpoint_id = 1;
+  optional EventType event_type = 2;
+}
+
 message MediumMetadata {
   // True if local device supports 5GHz.
   optional bool supports_5_ghz = 1;