diff --git a/cameleer3-server-core/src/main/java/com/cameleer3/server/core/search/SearchRequest.java b/cameleer3-server-core/src/main/java/com/cameleer3/server/core/search/SearchRequest.java
index ec1a80fb..f2c73a6b 100644
--- a/cameleer3-server-core/src/main/java/com/cameleer3/server/core/search/SearchRequest.java
+++ b/cameleer3-server-core/src/main/java/com/cameleer3/server/core/search/SearchRequest.java
@@ -59,16 +59,17 @@ public record SearchRequest(
             "durationMs", "executionId", "applicationName"
     );
 
-    /** Maps camelCase API sort field names to snake_case OpenSearch/DB column names. */
+    /** Maps camelCase API sort field names to OpenSearch field names.
+     *  Text fields use .keyword subfield; date/numeric fields are used directly. */
     private static final java.util.Map<String, String> SORT_FIELD_TO_COLUMN = java.util.Map.ofEntries(
             java.util.Map.entry("startTime", "start_time"),
-            java.util.Map.entry("status", "status"),
-            java.util.Map.entry("agentId", "agent_id"),
-            java.util.Map.entry("routeId", "route_id"),
-            java.util.Map.entry("correlationId", "correlation_id"),
             java.util.Map.entry("durationMs", "duration_ms"),
-            java.util.Map.entry("executionId", "execution_id"),
-            java.util.Map.entry("applicationName", "application_name")
+            java.util.Map.entry("status", "status.keyword"),
+            java.util.Map.entry("agentId", "agent_id.keyword"),
+            java.util.Map.entry("routeId", "route_id.keyword"),
+            java.util.Map.entry("correlationId", "correlation_id.keyword"),
+            java.util.Map.entry("executionId", "execution_id.keyword"),
+            java.util.Map.entry("applicationName", "application_name.keyword")
     );
 
     public SearchRequest {