diff --git a/agent/main.go b/agent/main.go
index 984f355..c4d896b 100644
--- a/agent/main.go
+++ b/agent/main.go
@@ -82,9 +82,6 @@ func main() {
 	case "output":
 		runOutput(cfg)
 		return
-	case "discover":
-		runDiscover()
-		return
 	}
 
 	// ── 正常采集上报模式 ──
@@ -394,6 +391,7 @@ func runOutput(cfg Config) {
 
 	// Agent 身份
 	ps("agent.hostname", report.Hostname)
+	ps("system.hostname", report.Hostname)
 	ps("agent.version", report.AgentVersion)
 	ps("agent.ip", report.IP)
 
@@ -439,6 +437,21 @@ func runOutput(cfg Config) {
 	}
 	pu("net.listen.count", len(report.Ports))
 
+	// 端口发现 Zabbix LLD JSON（合并为一行）
+	if len(report.Ports) > 0 {
+		type lldItem struct {
+			PName string `json:"{#PNAME}"`
+			PPort string `json:"{#PPORT}"`
+		}
+		items := make([]lldItem, 0, len(report.Ports))
+		for _, pt := range report.Ports {
+			items = append(items, lldItem{PName: pt.Process, PPort: strconv.Itoa(pt.Port)})
+		}
+		if jsonBytes, err := json.Marshal(map[string]interface{}{"data": items}); err == nil {
+			ps("ports.discovery[*]", string(jsonBytes))
+		}
+	}
+
 	// 网络 TCP
 	pu("net.tcp.established", report.Network.TCPEstablished)
 	pu("net.tcp.time_wait", report.Network.TCPTimeWait)
@@ -489,30 +502,6 @@ func runOutput(cfg Config) {
 	pu64("agent.heartbeat.report_seq", int64(report.Heartbeat.ReportSeq))
 }
 
-// ── runDiscover: Zabbix LLD 端口发现 ──
-
-func runDiscover() {
-	port := collector.NewPortCollector()
-	ports, err := port.Collect()
-	if err != nil {
-		fmt.Println(`{"data":[]}`)
-		return
-	}
-	type lldItem struct {
-		PName string `json:"{#PNAME}"`
-		PPort string `json:"{#PPORT}"`
-	}
-	items := make([]lldItem, 0, len(ports))
-	for _, p := range ports {
-		items = append(items, lldItem{
-			PName: p.Process,
-			PPort: strconv.Itoa(p.Port),
-		})
-	}
-	out, _ := json.Marshal(map[string]interface{}{"data": items})
-	fmt.Println(string(out))
-}
-
 // detectLocalIP 探测本机主 IP
 func detectLocalIP() string {
 	conn, err := net.Dial("udp", "8.8.8.8:53")