k8s/agent-access: a namespace-limited service account and kubeconfig for a coding agent

Read-only by default, optional deploy role; no Secrets, exec,
port-forward or RBAC. Tokens from kubectl create token, time-limited.
Not applied.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QLJfZQZeAKAwSqViTmLzki

k8s/agent-access/role-deploy.yaml

@@ -0,0 +1,59 @@
+# OPTIONAL, on top of role-read.yaml: lets the agent apply this repository's manifests and
+# restart workloads in mg4. Not in kustomization.yaml; add it there only if you want that.
+#
+# Still absent: Secrets, pods/exec, pods/attach, pods/portforward, RBAC, the Namespace itself,
+# and deleting PersistentVolumeClaims (InfluxDB's data lives on one).
+#
+# Note what this does allow: whoever may change a Deployment may run any image in the namespace,
+# and such a pod could mount mg4's Secrets and print them to its log. Read-only is the boundary
+# that holds against a misbehaving agent; this role is for convenience, given trust.
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: mg4-agent-deploy
+  namespace: mg4
+  labels:
+    app.kubernetes.io/part-of: mg4
+    app.kubernetes.io/component: agent-access
+rules:
+  - apiGroups: [apps]
+    resources: [deployments, statefulsets]
+    verbs: [create, update, patch, delete]
+  - apiGroups: [apps]
+    resources: [deployments/scale, statefulsets/scale]
+    verbs: [get, update, patch]
+  - apiGroups: [""]
+    resources: [services, configmaps]
+    verbs: [create, update, patch, delete]
+  - apiGroups: [""]
+    resources: [persistentvolumeclaims]
+    verbs: [create, update, patch]
+  - apiGroups: [""]
+    resources: [pods]
+    verbs: [delete]
+  - apiGroups: [batch]
+    resources: [jobs]
+    verbs: [create, delete]
+  - apiGroups: [networking.k8s.io]
+    resources: [networkpolicies]
+    verbs: [create, update, patch, delete]
+  - apiGroups: [traefik.io]
+    resources: [ingressroutes]
+    verbs: [create, update, patch, delete]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: mg4-agent-deploy
+  namespace: mg4
+  labels:
+    app.kubernetes.io/part-of: mg4
+    app.kubernetes.io/component: agent-access
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: mg4-agent-deploy
+subjects:
+  - kind: ServiceAccount
+    name: mg4-agent
+    namespace: mg4