diff --git a/services/hermes-triage-demo/fixture-pvc.yaml b/services/hermes-triage-demo/fixture-pvc.yaml
deleted file mode 100644
index 8827fd8b1..000000000
--- a/services/hermes-triage-demo/fixture-pvc.yaml
+++ /dev/null
@@ -1,17 +0,0 @@
-# services/hermes-triage-demo/fixture-pvc.yaml
-# Single-file demo fixture: holds one state value ("healthy"/"unhealthy").
-# The Jenkins test-runner reads it; the Ariadne repair Job writes it back to healthy.
-apiVersion: v1
-kind: PersistentVolumeClaim
-metadata:
-  name: hermes-triage-demo-fixture
-  namespace: hermes-triage-demo
-  labels:
-    app.kubernetes.io/part-of: hermes-triage-demo
-spec:
-  accessModes:
-    - ReadWriteOnce
-  storageClassName: longhorn
-  resources:
-    requests:
-      storage: 100Mi
diff --git a/services/hermes-triage-demo/kustomization.yaml b/services/hermes-triage-demo/kustomization.yaml
index 40027dcec..4881a27f0 100644
--- a/services/hermes-triage-demo/kustomization.yaml
+++ b/services/hermes-triage-demo/kustomization.yaml
@@ -3,5 +3,4 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
   - namespace.yaml
-  - fixture-pvc.yaml
   - rbac.yaml
diff --git a/services/hermes-triage-demo/rbac.yaml b/services/hermes-triage-demo/rbac.yaml
index 174f60923..5a2608c09 100644
--- a/services/hermes-triage-demo/rbac.yaml
+++ b/services/hermes-triage-demo/rbac.yaml
@@ -1,8 +1,19 @@
 # services/hermes-triage-demo/rbac.yaml
-# Lets Jenkins agent pods (SA jenkins/jenkins) create and observe the demo
-# test-runner Job in this namespace only. The Ariadne repair path needs no
-# grant here: its ariadne-job-spawner ClusterRole already covers Job
-# create/watch, and the repair pod itself only mounts the fixture PVC.
+# Two scoped grants:
+# 1. Jenkins agent pods (SA jenkins/jenkins) create and observe the demo
+#    test-runner Job and manage the fixture ConfigMap (ensure + seed).
+# 2. The Ariadne-created repair Job runs as SA hermes-demo-repair, which can
+#    patch only the fixture ConfigMap back to healthy.
+# The Ariadne repair path needs no Job-create grant here: its
+# ariadne-job-spawner ClusterRole already covers Job create/watch.
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: hermes-demo-repair
+  namespace: hermes-triage-demo
+  labels:
+    app.kubernetes.io/part-of: hermes-triage-demo
+---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: Role
 metadata:
@@ -20,6 +31,13 @@ rules:
   - apiGroups: [""]
     resources: ["pods/log"]
     verbs: ["get"]
+  - apiGroups: [""]
+    resources: ["configmaps"]
+    verbs: ["create"]
+  - apiGroups: [""]
+    resources: ["configmaps"]
+    resourceNames: ["hermes-triage-demo-fixture"]
+    verbs: ["get", "patch"]
 ---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: RoleBinding
@@ -36,3 +54,32 @@ subjects:
   - kind: ServiceAccount
     name: jenkins
     namespace: jenkins
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: demo-repair
+  namespace: hermes-triage-demo
+  labels:
+    app.kubernetes.io/part-of: hermes-triage-demo
+rules:
+  - apiGroups: [""]
+    resources: ["configmaps"]
+    resourceNames: ["hermes-triage-demo-fixture"]
+    verbs: ["get", "patch"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: demo-repair
+  namespace: hermes-triage-demo
+  labels:
+    app.kubernetes.io/part-of: hermes-triage-demo
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: demo-repair
+subjects:
+  - kind: ServiceAccount
+    name: hermes-demo-repair
+    namespace: hermes-triage-demo
diff --git a/services/jenkins/configmap-jcasc.yaml b/services/jenkins/configmap-jcasc.yaml
index 7f96c4c3b..06c3ed9b1 100644
--- a/services/jenkins/configmap-jcasc.yaml
+++ b/services/jenkins/configmap-jcasc.yaml
@@ -492,7 +492,12 @@ data:
                           def buildNum = '' + env.BUILD_NUMBER
                           def incidentId = 'hermes-triage-demo/' + buildNum
                           def jobName = 'hermes-demo-test-' + buildNum
-                          def seed = params.SEED_FAILURE ? 'true' : 'false'
+                          sh 'kubectl -n hermes-triage-demo get configmap hermes-triage-demo-fixture || kubectl -n hermes-triage-demo create configmap hermes-triage-demo-fixture --from-literal=state=healthy'
+                          if (params.SEED_FAILURE) {
+                            writeFile file: 'seed.json', text: '{"data":{"state":"unhealthy"}}'
+                            sh 'kubectl -n hermes-triage-demo patch configmap hermes-triage-demo-fixture --type merge --patch-file seed.json'
+                            echo 'Demo failure armed: fixture state set to unhealthy'
+                          }
                           def manifest = [
                             'apiVersion: batch/v1',
                             'kind: Job',
@@ -520,29 +525,21 @@ data:
                             '          env:',
                             '            - name: INCIDENT_ID',
                             '              value: "' + incidentId + '"',
-                            '            - name: SEED_FAILURE',
-                            '              value: "' + seed + '"',
                             '          command:',
                             '            - sh',
                             '            - -c',
                             '            - |',
-                            '              STATE_FILE=/fixture/state',
-                            '              if [ "$SEED_FAILURE" = "true" ]; then',
-                            '                echo unhealthy > "$STATE_FILE"',
-                            '              fi',
-                            '              if [ ! -f "$STATE_FILE" ]; then',
-                            '                echo healthy > "$STATE_FILE"',
-                            '              fi',
-                            '              STATE=$(cat "$STATE_FILE")',
+                            '              STATE=$(cat /fixture/state)',
                             '              if [ "$STATE" = "healthy" ]; then',
-                            '                echo "{\\\\"event\\\\":\\\\"hermes_demo_test_pass\\\\",\\\\"incident_id\\\\":\\\\"$INCIDENT_ID\\\\",\\\\"message\\\\":\\\\"fixture state healthy\\\\"}"',
+                            '                echo "{\\"event\\":\\"hermes_demo_test_pass\\",\\"incident_id\\":\\"$INCIDENT_ID\\",\\"message\\":\\"fixture state healthy\\"}"',
                             '                exit 0',
                             '              fi',
-                            '              echo "{\\\\"event\\\\":\\\\"hermes_demo_test_failure\\\\",\\\\"incident_id\\\\":\\\\"$INCIDENT_ID\\\\",\\\\"classification_hint\\\\":\\\\"demo_fixture_unhealthy\\\\",\\\\"message\\\\":\\\\"expected fixture state healthy; found $STATE\\\\"}"',
+                            '              echo "{\\"event\\":\\"hermes_demo_test_failure\\",\\"incident_id\\":\\"$INCIDENT_ID\\",\\"classification_hint\\":\\"demo_fixture_unhealthy\\",\\"message\\":\\"expected fixture state healthy; found $STATE\\"}"',
                             '              exit 1',
                             '          volumeMounts:',
                             '            - name: fixture',
                             '              mountPath: /fixture',
+                            '              readOnly: true',
                             '          resources:',
                             '            requests:',
                             '              cpu: 25m',
@@ -552,10 +549,10 @@ data:
                             '              memory: 32Mi',
                             '      volumes:',
                             '        - name: fixture',
-                            '          persistentVolumeClaim:',
-                            '            claimName: hermes-triage-demo-fixture'
+                            '          configMap:',
+                            '            name: hermes-triage-demo-fixture'
                           ]
-                          writeFile file: 'test-runner-job.yaml', text: manifest.join('\\n') + '\\n'
+                          writeFile file: 'test-runner-job.yaml', text: manifest.join('\n') + '\n'
                           sh 'kubectl -n hermes-triage-demo create -f test-runner-job.yaml'
                           def verdict = 'unknown'
                           timeout(time: 3, unit: 'MINUTES') {