/enums/search_term_match_type.proto 

--- v20/enums/search_term_match_type.proto  2025-08-05 14:39:37.000000000 +0000
+++ v21/enums/search_term_match_type.proto  2025-08-05 14:39:44.000000000 +0000
@@ -51,5 +51,11 @@

     // Phrase match (close variant).
     NEAR_PHRASE = 6;
+
+    // Match type for AI Max Search.
+    AI_MAX = 7;
+
+    // Match type for Performance Max campaigns.
+    PERFORMANCE_MAX = 8;
   }
 }