security(agent-zero): replace cluster-admin with least-privilege read-only RBAC (SEC-6/RBAC-001)

agent-zero is an LLM agent; cluster-admin let raw kubectl bypass the MCP layer to
read every Secret / exec any pod. Swap for a read-only ClusterRole (no secrets/
configmaps/exec/writes) so sensitive + mutating actions go through gated MCP tools.
Already applied live + verified (secrets/exec/write -> Forbidden, observe stays);
this makes it durable so ArgoCD selfHeal doesn't revert to cluster-admin.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/agent-zero/agent-zero.yaml

@@ -76,14 +76,47 @@ metadata:
   namespace: agent-zero
 
 ---
+# SEC-6 / audit RBAC-001: agent-zero is an LLM agent — cluster-admin let raw
+# kubectl BYPASS the MCP layer to read every Secret / exec any pod. Scoped to
+# read-only (no secrets/configmaps/exec/writes) so sensitive + mutating actions
+# must go through the gated MCP tools (the operator's intended boundary).
+# Detail: FlowerCore.Notes docs/security/sec-6-agent-zero-rbac-remediation.md.
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: agent-zero-readonly
+  labels:
+    flowercore.io/sec-lane: SEC-6
+rules:
+  - apiGroups: [""]
+    resources: ["pods", "pods/log", "services", "endpoints", "events", "namespaces", "nodes", "persistentvolumeclaims", "replicationcontrollers", "serviceaccounts"]
+    verbs: ["get", "list", "watch"]
+  - apiGroups: ["apps"]
+    resources: ["deployments", "replicasets", "statefulsets", "daemonsets"]
+    verbs: ["get", "list", "watch"]
+  - apiGroups: ["batch"]
+    resources: ["jobs", "cronjobs"]
+    verbs: ["get", "list", "watch"]
+  - apiGroups: ["networking.k8s.io"]
+    resources: ["ingresses", "networkpolicies"]
+    verbs: ["get", "list", "watch"]
+  - apiGroups: ["traefik.io", "traefik.containo.us"]
+    resources: ["ingressroutes", "middlewares"]
+    verbs: ["get", "list", "watch"]
+  - apiGroups: ["metrics.k8s.io"]
+    resources: ["pods", "nodes"]
+    verbs: ["get", "list"]
+---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRoleBinding
 metadata:
-  name: agent-zero-cluster-admin
+  name: agent-zero-readonly
+  labels:
+    flowercore.io/sec-lane: SEC-6
 roleRef:
   apiGroup: rbac.authorization.k8s.io
   kind: ClusterRole
-  name: cluster-admin
+  name: agent-zero-readonly
 subjects:
   - kind: ServiceAccount
     name: agent-zero