diff --git a/doc/thinking/2026-04-26-namespace-manager-step50.md b/doc/thinking/2026-04-26-namespace-manager-step50.md
index 3e446fef..c40be65b 100644
--- a/doc/thinking/2026-04-26-namespace-manager-step50.md
+++ b/doc/thinking/2026-04-26-namespace-manager-step50.md
@@ -2,6 +2,21 @@
 
 ## Цель шага
 
+Сделать summary/debug surface полезным в реальном watcher lifecycle, а не только на этапе подготовки manager-а.
+
+## Что изменено
+
+1. После успешных add/resync/remove transitions watcher helpers теперь пишут компактный summary manager-а.
+2. Добавлен unit test на add-handler path с проверкой structured-log полей.
+
+## Что это даёт
+
+- runtime behavior не меняется;
+- появляется последовательный debug trail по изменению manager state;
+- новый helper `HasActiveNamespaces()` теперь используется и в general logging path, и в watcher transition path.# 2026-04-26 — NamespaceManager rewrite, step 50
+
+## Цель шага
+
 Сделать orchestration API для managed namespace watcher-а жёстче и читабельнее.
 
 ## Что меняем
diff --git a/pkg/utils/namespace_manager.go b/pkg/utils/namespace_manager.go
index aaf23724..1d595bbc 100644
--- a/pkg/utils/namespace_manager.go
+++ b/pkg/utils/namespace_manager.go
@@ -191,7 +191,9 @@ func HandleWatcherNamespaceAdd(ctx context.Context, logger *zap.Logger, componen
 	}
 	if _, _, err := DispatchNamespaceAdd(ctx, manager, namespace, NamespaceSourceWatcher, time.Now().UTC()); err != nil {
 		logger.Error(component+": DispatchAdd failed", zap.String("namespace", namespace.Name), zap.Error(err))
+		return
 	}
+	LogNamespaceManagerSummary(logger, component+": namespace manager summary", manager.Summary())
 }
 
 func HandleWatcherNamespaceUpdate(ctx context.Context, logger *zap.Logger, component string, manager NamespaceManager, oldNamespace *corev1.Namespace, newNamespace *corev1.Namespace, strategy NamespaceRemovalStrategy) {
@@ -207,7 +209,9 @@ func HandleWatcherNamespaceUpdate(ctx context.Context, logger *zap.Logger, compo
 	}
 	if _, _, err := DispatchNamespaceResync(ctx, manager, newNamespace, NamespaceSourceWatcher, time.Now().UTC()); err != nil {
 		logger.Error(component+": DispatchResync failed", zap.String("namespace", newNamespace.Name), zap.Error(err))
+		return
 	}
+	LogNamespaceManagerSummary(logger, component+": namespace manager summary", manager.Summary())
 }
 
 func HandleWatcherNamespaceDelete(ctx context.Context, logger *zap.Logger, component string, manager NamespaceManager, obj interface{}, strategy NamespaceRemovalStrategy) {
@@ -226,10 +230,12 @@ func HandleWatcherNamespaceRemoval(ctx context.Context, logger *zap.Logger, comp
 		}
 		logger.Info(component+": namespace removal dispatched through subscribers",
 			zap.String("namespace", record.Name))
+		LogNamespaceManagerSummary(logger, component+": namespace manager summary", manager.Summary())
 		return
 	}
 	logger.Info(component+": namespace removed from manager state; runtime registrations kept",
 		zap.String("namespace", record.Name))
+	LogNamespaceManagerSummary(logger, component+": namespace manager summary", manager.Summary())
 }
 
 func NewNamespaceWatcherEventHandlers(ctx context.Context, logger *zap.Logger, component string, manager NamespaceManager, strategy NamespaceRemovalStrategy) k8sCache.ResourceEventHandlerFuncs {
diff --git a/pkg/utils/namespace_manager_test.go b/pkg/utils/namespace_manager_test.go
index f47ce939..90c2c6dc 100644
--- a/pkg/utils/namespace_manager_test.go
+++ b/pkg/utils/namespace_manager_test.go
@@ -378,6 +378,35 @@ func TestHandleWatcherNamespaceAddUpdateDelete(t *testing.T) {
 	}
 }
 
+func TestHandleWatcherNamespaceAddLogsSummary(t *testing.T) {
+	manager := NewNamespaceManager()
+	router := &testNamespaceSubscriber{name: "router"}
+	manager.Subscribe(router)
+	core, logs := observer.New(zap.InfoLevel)
+	logger := zap.New(core)
+	namespace := &corev1.Namespace{}
+	namespace.Name = "tenant-a"
+	namespace.Labels = map[string]string{ManagedNamespaceLabelKey: ManagedNamespaceLabelValue}
+
+	HandleWatcherNamespaceAdd(context.Background(), logger, "router.NSWatcher", manager, namespace)
+
+	entries := logs.AllUntimed()
+	if len(entries) != 1 {
+		t.Fatalf("expected one summary log entry, got %d", len(entries))
+	}
+	if entries[0].Message != "router.NSWatcher: namespace manager summary" {
+		t.Fatalf("unexpected log message: %s", entries[0].Message)
+	}
+	fields := entries[0].ContextMap()
+	active, ok := fields["has_active_namespaces"].(bool)
+	if !ok || !active {
+		t.Fatalf("expected summary log to report active namespaces")
+	}
+	if live, ok := fields["live_namespaces"].(int64); !ok || live != 1 {
+		t.Fatalf("expected summary log to report one live namespace, got %v", fields["live_namespaces"])
+	}
+}
+
 func TestHandleWatcherNamespaceRemovalDispatch(t *testing.T) {
 	manager := NewNamespaceManager()
 	router := &testNamespaceSubscriber{name: "router"}