diff --git a/pkg/agent/loop.go b/pkg/agent/loop.go
index 28e549ce0..646a0046f 100644
--- a/pkg/agent/loop.go
+++ b/pkg/agent/loop.go
@@ -1508,6 +1508,8 @@ func (al *AgentLoop) summarizeSession(agent *AgentInstance, sessionKey string) {
 	}
 
 	if len(validMessages) == 0 {
+		agent.Sessions.TruncateHistory(sessionKey, 4)
+		agent.Sessions.Save(sessionKey)
 		return
 	}