fix: hide compressed historical messages notification (#799)

pkg/agent/loop.go

@@ -759,13 +759,7 @@ func (al *AgentLoop) maybeSummarize(agent *AgentInstance, sessionKey, channel, c
 		if _, loading := al.summarizing.LoadOrStore(summarizeKey, true); !loading {
 			go func() {
 				defer al.summarizing.Delete(summarizeKey)
-				if !constants.IsInternalChannel(channel) {
-					al.bus.PublishOutbound(bus.OutboundMessage{
-						Channel: channel,
-						ChatID:  chatID,
-						Content: "Memory threshold reached. Optimizing conversation history...",
-					})
-				}
+				logger.Debug("Memory threshold reached. Optimizing conversation history...")
 				al.summarizeSession(agent, sessionKey)
 			}()
 		}