diff --git a/README.md b/README.md
index 4858144..9fbc89f 100644
--- a/README.md
+++ b/README.md
@@ -128,6 +128,20 @@ Node는 모델 런타임, CLI Agent, 도구 실행을 담당한다. Node는 Cont
 
 Node는 가능한 한 단순한 실행 단위로 유지한다. 정책, 전체 시스템 조정, 다중 Edge 운영 판단을 Node에 밀어 넣지 않고, 전달받은 실행을 안정적으로 수행하는 데 집중한다.
 
+### Worker Structure
+
+Edge, Node, Control Plane은 별도 `iop-worker` 앱으로 분리하지 않고, 각 Go 서비스 내부의 공통 Worker 모듈을 사용한다. 공통 처리 모델은 `Job Queue`, `Worker Pool`, `Job Status`, `Retry`, `Timeout`, `Cancel`이며, Worker가 담당하는 역할은 서비스별 책임에 맞춰 분리한다.
+
+- **Edge Worker**
+  - 사용자 요청 처리 흐름에 붙는 짧은 병렬/비동기 작업을 담당한다.
+  - intent 분석, history refinement, routing 보조, 응답 validation, fallback 판단, stream 종료 후 usage/log/metric 기록을 처리한다.
+- **Node Worker**
+  - 모델 런타임과 로컬 프로세스에 붙는 작업을 담당한다.
+  - runtime adapter 처리, model process 상태 감시, local queue 처리, streaming relay 보조, local metric/log flush를 처리한다.
+- **Control Plane Worker**
+  - 운영/관리/스케줄 기반 작업을 담당한다.
+  - node health 수집, model registry 동기화, policy/config 배포, drain/reload 명령, benchmark/job 실행, 운영 리포트와 cleanup 작업을 처리한다.
+
 ## Execution Model
 
 ### Adapter and Target
@@ -195,7 +209,7 @@ NomadCode
 | `apps/node` | Edge에 연결되어 adapter execution을 수행하는 Node agent |
 | `apps/edge` | Node registry, 설정 전달, routing, stream relay를 담당하는 Edge skeleton |
 | `apps/control-plane` | 향후 여러 Edge를 연결하고 운영 화면을 제공할 중앙 관리 계층 |
-| `apps/worker` | 향후 비동기 작업 처리 가능성을 위한 placeholder |
+| `apps/worker` | 현재 placeholder이며, Worker 구조는 우선 각 Go 서비스 내부 공통 모듈 방향으로 둔다 |
 | `packages` | 설정, 인증, 정책, 작업, 관측성, 버전 등 공통 패키지 |
 | `proto` | 앱 간 메시지 계약 원본과 생성물 |
 | `configs` | 현재 개발용 설정 예시 |
diff --git a/apps/edge/cmd/edge/console_events.go b/apps/edge/cmd/edge/console_events.go
index d76f9e2..aef2622 100644
--- a/apps/edge/cmd/edge/console_events.go
+++ b/apps/edge/cmd/edge/console_events.go
@@ -126,16 +126,31 @@ func (r *consoleEventRouter) printNodeEventLocked(event *iop.EdgeNodeEvent) {
 	}
 
 	label := r.edgeNodeLabel(event)
+	detail := transportCloseDetail(event.GetMetadata())
 	switch event.GetType() {
 	case eventpkg.TypeNodeConnected:
-		fmt.Fprintf(r.out, "[node-%s-event] connected reason=%q\n", label, event.GetReason())
+		fmt.Fprintf(r.out, "[node-%s-event] connected reason=%q%s\n", label, event.GetReason(), detail)
 	case eventpkg.TypeNodeDisconnected:
-		fmt.Fprintf(r.out, "[node-%s-event] disconnected reason=%q\n", label, event.GetReason())
+		fmt.Fprintf(r.out, "[node-%s-event] disconnected reason=%q%s\n", label, event.GetReason(), detail)
 	default:
-		fmt.Fprintf(r.out, "[node-%s-event] %s reason=%q\n", label, event.GetType(), event.GetReason())
+		fmt.Fprintf(r.out, "[node-%s-event] %s reason=%q%s\n", label, event.GetType(), event.GetReason(), detail)
 	}
 }
 
+func transportCloseDetail(metadata map[string]string) string {
+	if metadata == nil {
+		return ""
+	}
+	detail := ""
+	if reason := metadata[eventpkg.MetadataTransportCloseReason]; reason != "" {
+		detail += fmt.Sprintf(" transport_close_reason=%q", reason)
+	}
+	if err := metadata[eventpkg.MetadataTransportCloseError]; err != "" {
+		detail += fmt.Sprintf(" transport_close_error=%q", err)
+	}
+	return detail
+}
+
 func (r *consoleEventRouter) printAsyncLocked(event *iop.RunEvent) {
 	if r.out == nil {
 		return
diff --git a/apps/edge/cmd/edge/console_test.go b/apps/edge/cmd/edge/console_test.go
index 8fc73de..dabbcbe 100644
--- a/apps/edge/cmd/edge/console_test.go
+++ b/apps/edge/cmd/edge/console_test.go
@@ -421,10 +421,20 @@ func TestConsoleEventRouterPrintsNodeLifecycleEvents(t *testing.T) {
 		NodeId: "node-1",
 		Alias:  "alias-1",
 		Reason: eventpkg.ReasonTransportClosed,
+		Metadata: map[string]string{
+			eventpkg.MetadataTransportCloseReason: "heartbeat_timeout",
+			eventpkg.MetadataTransportCloseError:  "no heartbeat response within 10s",
+		},
 	})
 
 	got := out.String()
 	if !strings.Contains(got, `[node-alias-1-event] disconnected reason="transport_closed"`) {
 		t.Errorf("expected disconnected lifecycle output, got:\n%s", got)
 	}
+	if !strings.Contains(got, `transport_close_reason="heartbeat_timeout"`) {
+		t.Errorf("expected transport close reason, got:\n%s", got)
+	}
+	if !strings.Contains(got, `transport_close_error="no heartbeat response within 10s"`) {
+		t.Errorf("expected transport close error, got:\n%s", got)
+	}
 }
diff --git a/apps/edge/internal/transport/integration_test.go b/apps/edge/internal/transport/integration_test.go
index 209fe3c..7a98c7d 100644
--- a/apps/edge/internal/transport/integration_test.go
+++ b/apps/edge/internal/transport/integration_test.go
@@ -184,6 +184,12 @@ func TestEdgeServerIntegration(t *testing.T) {
 		if event.GetNodeId() != wantNodeID || event.GetAlias() != "test-node" || event.GetReason() != eventpkg.ReasonTransportClosed {
 			t.Fatalf("unexpected disconnected event: %+v", event)
 		}
+		if event.GetMetadata()[eventpkg.MetadataTransportCloseReason] != toki.DisconnectReasonRemoteClosed {
+			t.Fatalf("transport close reason: got %q want %q", event.GetMetadata()[eventpkg.MetadataTransportCloseReason], toki.DisconnectReasonRemoteClosed)
+		}
+		if event.GetMetadata()[eventpkg.MetadataTransportCloseError] == "" {
+			t.Fatalf("expected transport close error metadata, got %+v", event.GetMetadata())
+		}
 	case <-time.After(2 * time.Second):
 		t.Fatal("timeout waiting for node disconnected event")
 	}
diff --git a/apps/edge/internal/transport/server.go b/apps/edge/internal/transport/server.go
index e9dd28a..68ae3f0 100644
--- a/apps/edge/internal/transport/server.go
+++ b/apps/edge/internal/transport/server.go
@@ -154,7 +154,10 @@ func (s *Server) onNodeConnected(client *toki.TcpClient) {
 			})
 			client.AddDisconnectListener(func(_ *toki.TcpClient) {
 				s.registry.Unregister(rec.ID)
-				s.logger.Info("node unregistered", zap.String("node_id", rec.ID))
+				transportInfo := client.DisconnectInfo()
+				fields := []zap.Field{zap.String("node_id", rec.ID)}
+				fields = append(fields, transportDisconnectFields(transportInfo)...)
+				s.logger.Info("node unregistered", fields...)
 				reason := events.ReasonTransportClosed
 				if s.stopping.Load() {
 					reason = events.ReasonEdgeShutdown
@@ -165,7 +168,7 @@ func (s *Server) onNodeConnected(client *toki.TcpClient) {
 					rec.ID,
 					rec.Alias,
 					reason,
-					nil,
+					transportDisconnectMetadata(transportInfo),
 				))
 			})
 			s.registry.Register(entry)
@@ -212,3 +215,28 @@ func safePrefix(s string) string {
 	}
 	return s
 }
+
+func transportDisconnectMetadata(info toki.DisconnectInfo) map[string]string {
+	metadata := make(map[string]string, 2)
+	if info.Reason != "" {
+		metadata[events.MetadataTransportCloseReason] = info.Reason
+	}
+	if info.Error != "" {
+		metadata[events.MetadataTransportCloseError] = info.Error
+	}
+	if len(metadata) == 0 {
+		return nil
+	}
+	return metadata
+}
+
+func transportDisconnectFields(info toki.DisconnectInfo) []zap.Field {
+	fields := make([]zap.Field, 0, 2)
+	if info.Reason != "" {
+		fields = append(fields, zap.String("transport_close_reason", info.Reason))
+	}
+	if info.Error != "" {
+		fields = append(fields, zap.String("transport_close_error", info.Error))
+	}
+	return fields
+}
diff --git a/apps/node/internal/bootstrap/module.go b/apps/node/internal/bootstrap/module.go
index 162dea6..96cb744 100644
--- a/apps/node/internal/bootstrap/module.go
+++ b/apps/node/internal/bootstrap/module.go
@@ -120,8 +120,22 @@ func printEdgeEvent(out io.Writer, event *iop.EdgeNodeEvent) {
 	}
 	switch event.GetType() {
 	case events.TypeEdgeDisconnected:
-		fmt.Fprintf(out, "[edge-event] disconnected reason=%q\n", event.GetReason())
+		fmt.Fprintf(out, "[edge-event] disconnected reason=%q%s\n", event.GetReason(), transportCloseDetail(event.GetMetadata()))
 	default:
-		fmt.Fprintf(out, "[edge-event] %s reason=%q\n", event.GetType(), event.GetReason())
+		fmt.Fprintf(out, "[edge-event] %s reason=%q%s\n", event.GetType(), event.GetReason(), transportCloseDetail(event.GetMetadata()))
 	}
 }
+
+func transportCloseDetail(metadata map[string]string) string {
+	if metadata == nil {
+		return ""
+	}
+	detail := ""
+	if reason := metadata[events.MetadataTransportCloseReason]; reason != "" {
+		detail += fmt.Sprintf(" transport_close_reason=%q", reason)
+	}
+	if err := metadata[events.MetadataTransportCloseError]; err != "" {
+		detail += fmt.Sprintf(" transport_close_error=%q", err)
+	}
+	return detail
+}
diff --git a/apps/node/internal/transport/integration_test.go b/apps/node/internal/transport/integration_test.go
index 58b072b..3eb8de9 100644
--- a/apps/node/internal/transport/integration_test.go
+++ b/apps/node/internal/transport/integration_test.go
@@ -186,6 +186,12 @@ func TestNodeClientIntegration(t *testing.T) {
 		if event.GetNodeId() != "test-node" || event.GetAlias() != "test-alias" || event.GetReason() != eventpkg.ReasonTransportClosed {
 			t.Fatalf("unexpected edge disconnected event: %+v", event)
 		}
+		if event.GetMetadata()[eventpkg.MetadataTransportCloseReason] != toki.DisconnectReasonRemoteClosed {
+			t.Fatalf("transport close reason: got %q want %q", event.GetMetadata()[eventpkg.MetadataTransportCloseReason], toki.DisconnectReasonRemoteClosed)
+		}
+		if event.GetMetadata()[eventpkg.MetadataTransportCloseError] == "" {
+			t.Fatalf("expected transport close error metadata, got %+v", event.GetMetadata())
+		}
 	case <-time.After(2 * time.Second):
 		t.Fatal("timeout waiting for edge disconnected event")
 	}
diff --git a/apps/node/internal/transport/session.go b/apps/node/internal/transport/session.go
index 2a44202..634e550 100644
--- a/apps/node/internal/transport/session.go
+++ b/apps/node/internal/transport/session.go
@@ -85,14 +85,15 @@ func newSession(client *toki.TcpClient, logger *zap.Logger, nodeID, alias string
 	})
 
 	client.AddDisconnectListener(func(_ *toki.TcpClient) {
-		logger.Info("disconnected from edge")
+		transportInfo := client.DisconnectInfo()
+		logger.Info("disconnected from edge", transportDisconnectFields(transportInfo)...)
 		s.emitEvent(events.NewEdgeNodeEvent(
 			events.SourceNode,
 			events.TypeEdgeDisconnected,
 			nodeID,
 			alias,
 			s.disconnectReason(),
-			nil,
+			transportDisconnectMetadata(transportInfo),
 		))
 	})
 
@@ -152,3 +153,28 @@ func (s *Session) disconnectReason() string {
 	}
 	return reason
 }
+
+func transportDisconnectMetadata(info toki.DisconnectInfo) map[string]string {
+	metadata := make(map[string]string, 2)
+	if info.Reason != "" {
+		metadata[events.MetadataTransportCloseReason] = info.Reason
+	}
+	if info.Error != "" {
+		metadata[events.MetadataTransportCloseError] = info.Error
+	}
+	if len(metadata) == 0 {
+		return nil
+	}
+	return metadata
+}
+
+func transportDisconnectFields(info toki.DisconnectInfo) []zap.Field {
+	fields := make([]zap.Field, 0, 2)
+	if info.Reason != "" {
+		fields = append(fields, zap.String("transport_close_reason", info.Reason))
+	}
+	if info.Error != "" {
+		fields = append(fields, zap.String("transport_close_error", info.Error))
+	}
+	return fields
+}
diff --git a/packages/events/events.go b/packages/events/events.go
index b806a2d..3208367 100644
--- a/packages/events/events.go
+++ b/packages/events/events.go
@@ -20,6 +20,9 @@ const (
 	ReasonTransportClosed = "transport_closed"
 	ReasonLocalShutdown   = "local_shutdown"
 	ReasonEdgeShutdown    = "edge_shutdown"
+
+	MetadataTransportCloseReason = "transport_close_reason"
+	MetadataTransportCloseError  = "transport_close_error"
 )
 
 func NewEdgeNodeEvent(source, eventType, nodeID, alias, reason string, metadata map[string]string) *iop.EdgeNodeEvent {