From ce6ffc5b25670dd3f35bdb0fcefdf7374eed4638 Mon Sep 17 00:00:00 2001
From: Krishnan Govindraj <krishnan@typedb.com>
Date: Tue, 11 Nov 2025 20:59:06 +0100
Subject: [PATCH] Introduce extension version

---
 proto/connection.proto | 1 +
 proto/version.proto    | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/proto/connection.proto b/proto/connection.proto
index 6123524e..d288eb46 100644
--- a/proto/connection.proto
+++ b/proto/connection.proto
@@ -15,6 +15,7 @@ message Connection {
   message Open {
     message Req {
       Version version = 1;
+      ExtensionVersion extension_version = 5;
       string driver_lang = 2;
       string driver_version = 3;
 
diff --git a/proto/version.proto b/proto/version.proto
index 8469fe63..7bd14c76 100644
--- a/proto/version.proto
+++ b/proto/version.proto
@@ -11,3 +11,8 @@ enum Version {
   UNSPECIFIED = 0;
   VERSION = 7;
 }
+
+enum ExtensionVersion {
+  UNSPECIFIED_EXTENSION = 0;
+  EXTENSION = 1; // Reserving makes little sense here.
+}