diff --git a/.woodpecker/deploy.yml b/.woodpecker/deploy.yml
index 20559d6..56e9937 100644
--- a/.woodpecker/deploy.yml
+++ b/.woodpecker/deploy.yml
@@ -3,6 +3,20 @@ when:
     branch: main
 
 steps:
+  debug-secrets:
+    image: alpine:latest
+    environment:
+      SSH_KEY:
+        from_secret: ssh_key
+      SWARM_MANAGER_IP:
+        from_secret: swarm_manager_ip
+    commands:
+      - |
+        echo "=== DIAGNOSTIC: secret byte lengths only, never values (temporary) ==="
+        echo "SSH_KEY length: $(echo -n "$SSH_KEY" | wc -c)"
+        echo "SWARM_MANAGER_IP length: $(echo -n "$SWARM_MANAGER_IP" | wc -c)"
+        echo "=== END DIAGNOSTIC ==="
+
   validate:
     image: alpine:latest
     commands: