diff.patch

diff --git a/Kptfile b/Kptfile
index 68ea4fc..85f42f5 100644
--- a/Kptfile
+++ b/Kptfile
@@ -1,14 +1,16 @@
-apiVersion: kpt.dev/v1
-kind: Kptfile
-metadata:
-  name: app
-pipeline:
-  mutators:
-    - image: ghcr.io/kptdev/krm-functions-catalog/set-namespace
-      tag: "0.4.1 - 0.4.3"
-      configMap:
-        namespace: staging
-    - image: ghcr.io/kptdev/krm-functions-catalog/set-labels
-      tag: "~0.2"
-      configMap:
-        tier: backend
+apiVersion: kpt.dev/v1
+kind: Kptfile
+metadata:
+  name: app
+  labels:
+    tier: backend
+pipeline:
+  mutators:
+    - image: ghcr.io/kptdev/krm-functions-catalog/set-namespace
+      tag: "0.4.1 - 0.4.3"
+      configMap:
+        namespace: staging
+    - image: ghcr.io/kptdev/krm-functions-catalog/set-labels
+      tag: "~0.2"
+      configMap:
+        tier: backend
diff --git a/resources.yaml b/resources.yaml
index ffbb3d7..936d957 100644
--- a/resources.yaml
+++ b/resources.yaml
@@ -1,26 +1,34 @@
-# Copyright 2026 The kpt Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: nginx-deployment
-spec:
-  replicas: 3
----
-apiVersion: custom.io/v1
-kind: Custom
-metadata:
-  name: custom
-spec:
-  image: nginx:1.2.3
+# Copyright 2026 The kpt Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+  namespace: staging
+  labels:
+    tier: backend
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      tier: backend
+---
+apiVersion: custom.io/v1
+kind: Custom
+metadata:
+  name: custom
+  labels:
+    tier: backend
+spec:
+  image: nginx:1.2.3