diff --git a/pkg/agent/loop.go b/pkg/agent/loop.go
index d21f72e69..8875b2be8 100644
--- a/pkg/agent/loop.go
+++ b/pkg/agent/loop.go
@@ -1636,6 +1636,8 @@ func (al *AgentLoop) summarizeSession(agent *AgentInstance, sessionKey string) {
 	}
 
 	if len(validMessages) == 0 {
+		agent.Sessions.TruncateHistory(sessionKey, 4)
+		agent.Sessions.Save(sessionKey)
 		return
 	}