diff --git a/apps/nginx-weighted/traefikservice.yaml b/apps/nginx-weighted/traefikservice.yaml
new file mode 100644
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+++ b/apps/nginx-weighted/traefikservice.yaml
@@ -0,0 +1,25 @@
+---
+# TraefikService — weighted load balancer between stable and canary.
+# THIS IS THE ONLY FILE YOU NEED TO EDIT to shift traffic weights.
+#
+# Weight scenarios:
+#   Initial canary test    → stable: 90  canary: 10
+#   Extended testing       → stable: 50  canary: 50
+#   Full promote to canary → stable:  0  canary: 100
+#   Emergency rollback     → stable: 100 canary:  0
+apiVersion: traefik.io/v1alpha1
+kind: TraefikService
+metadata:
+  name: nginx-weighted
+  namespace: nginx-mcp
+spec:
+  weighted:
+    services:
+      - name: nginx-mcp
+        namespace: nginx-mcp
+        port: 80
+        weight: 90
+      - name: nginx-canary-proxy
+        namespace: nginx-mcp
+        port: 80
+        weight: 10