diff --git a/infrastructure/core/node-maintenance.yaml b/infrastructure/core/node-maintenance.yaml
index d3eca0d0..e2a0c094 100644
--- a/infrastructure/core/node-maintenance.yaml
+++ b/infrastructure/core/node-maintenance.yaml
@@ -5,7 +5,13 @@ apiVersion: v1
 kind: Node
 metadata:
   name: titan-14
+  labels:
+    hardware: rpi4
+    node-role.kubernetes.io/worker: "true"
+    longhorn-host: "true"
   annotations:
+    # Keep the runtime's other node fields; quarantine only owns placement.
+    kustomize.toolkit.fluxcd.io/ssa: Merge
     kustomize.toolkit.fluxcd.io/prune: disabled
     atlas.bstein.dev/maintenance-reason: "Runtime USB flash saturation; replace or repair media and verify I/O before uncordoning."
 spec:
@@ -15,7 +21,12 @@ apiVersion: v1
 kind: Node
 metadata:
   name: titan-11
+  labels:
+    hardware: rpi5
+    node-role.kubernetes.io/worker: "true"
+    longhorn-host: "true"
   annotations:
+    kustomize.toolkit.fluxcd.io/ssa: Merge
     kustomize.toolkit.fluxcd.io/prune: disabled
     atlas.bstein.dev/maintenance-reason: "Repeated fresh undervoltage events; verify power delivery under load before accepting new workloads."
 spec:
@@ -25,7 +36,12 @@ apiVersion: v1
 kind: Node
 metadata:
   name: titan-18
+  labels:
+    hardware: rpi4
+    node-role.kubernetes.io/worker: "true"
+    longhorn-host: "true"
   annotations:
+    kustomize.toolkit.fluxcd.io/ssa: Merge
     kustomize.toolkit.fluxcd.io/prune: disabled
     atlas.bstein.dev/maintenance-reason: "Sustained runtime I/O stalls prevent Longhorn engine startup; reduce load and verify storage before uncordoning."
 spec: