diff --git a/chat.el b/chat.el
index 6d809e2..c626390 100644
--- a/chat.el
+++ b/chat.el
@@ -649,7 +649,7 @@ fn handle_chat_agentic(body: String) -> String {
     let session_valid: Bool = if str_eq(req_session, "") {
         true
     } else {
-        session_exists(req_session)
+        !str_contains(session_get(req_session), "\"error\"")
     }
     if !session_valid {
         return "{\"error\":\"session not found\",\"session_id\":\"" + req_session + "\",\"reply\":\"\"}"