CCR-2026-0004: capabilities-safe verify + agent high-risk boundary

Record WP-0026 T07 promotion evidence (no secret values), mark the
offsite backup lane front door resolvable/ready, and add OpenBao policy
agent-high-risk-boundary for coding-agent metadata-only access.

credential-change-requests/CCR-2026-0004-railiance-backup-offsite-lane.yaml

@@ -5,7 +5,7 @@ request_type: workload-kv-read
 title: Railiance offsite backup lane (Nextcloud WebDAV + age recovery)
 status: active
 created: '2026-07-07'
-updated: '2026-07-07'
+updated: '2026-07-16'
 requester:
   agent: grok
   reason: Move railiance-backup / forgejo-backup credentials from hardcoded script
@@ -62,8 +62,8 @@ access_frontdoor:
   catalog_id: railiance-backup-offsite-lane
   selector: railiance backup nextcloud webdav token
   command: warden access railiance-backup-offsite-lane --fetch NC_WEBDAV_TOKEN
-  resolvable: false
-  readiness: applied-pending-verify
+  resolvable: true
+  readiness: ready
 delivery:
   surface: operator-workstation
   target: railiance-platform lib/railiance-backup-common.sh and forgejo-backup via
@@ -105,6 +105,19 @@ verification:
       NC_WEBDAV_URL, AGE_PRIVATE_KEY; field presence verified without printing values
     - 'Delegated metadata apply: policy workload-kv-read-railiance-backup-offsite-lane
       and OIDC role railiance-backup-workload-kv-read'
+  - at: '2026-07-16T14:00:00+00:00'
+    actor: grok
+    kind: capabilities_safe_verify
+    result: passed
+    details:
+    - 'WP-0026 T07: capabilities-safe re-verify on bao.coulomb.social (no secret values read).'
+    - 'Positive: token with policy workload-kv-read-railiance-backup-offsite-lane → capabilities read on platform/data/workloads/railiance/backup/offsite-lane.'
+    - 'Negative: default-policy token → deny on the same data path; token revoked after check.'
+    - 'Agent boundary: policy agent-high-risk-boundary → deny on data path, read on metadata path.'
+    - 'Field presence via JSON key inventory only (NC_WEBDAV_TOKEN, NC_WEBDAV_URL, AGE_PRIVATE_KEY); lengths recorded, values not printed.'
+    - 'EXPOSED taint set: custom_metadata exposed_at=2026-07-16T00:00:00Z exposed_version=2 (WP-0026 T05).'
+    - 'ops-warden catalog promoted draft→active; fetch_command pinned to NC_WEBDAV_TOKEN; resolvable=true; risk=high.'
+
 lifecycle:
   deactivate: Disable ops-warden catalog entry and detach OIDC role policy; rotate
     Nextcloud file-drop token at provider.

openbao/policies/agent-high-risk-boundary.hcl

@@ -0,0 +1,47 @@
+# Agent coding read-boundary for high-risk secret lanes (WARDEN-WP-0026 T04).
+#
+# Coding agents (Claude/Codex/Grok sessions, automated workers) MUST NOT hold
+# raw data-read on high-risk recovery/upload/admin secrets. This policy is the
+# allow-list they *may* carry for those paths: metadata + capabilities only.
+# Operator OIDC roles keep the full workload-kv-read-* policies separately.
+#
+# High-risk set (must stay in sync with ops-warden catalog risk: high):
+#   - railiance backup offsite (WebDAV upload + age recovery escrow)
+#   - forgejo admin PAT
+#   - openrouter LLM provider key (provider spend + prompt-adjacent)
+#
+# Apply live: `bao policy write agent-high-risk-boundary openbao/policies/agent-high-risk-boundary.hcl`
+# Attach to agent AppRoles / tokens; never attach workload-kv-read-* for these paths
+# to the same identity.
+
+# --- railiance-backup-offsite-lane ---
+path "platform/data/workloads/railiance/backup/offsite-lane" {
+  capabilities = ["deny"]
+}
+path "platform/metadata/workloads/railiance/backup/offsite-lane" {
+  capabilities = ["read"]
+}
+
+# --- forgejo-admin ---
+path "platform/data/workloads/forgejo/forgejo-admin" {
+  capabilities = ["deny"]
+}
+path "platform/metadata/workloads/forgejo/forgejo-admin" {
+  capabilities = ["read"]
+}
+
+# --- openrouter-llm-connect ---
+path "platform/data/workloads/activity-core/llm-connect/llm-connect-provider-secrets" {
+  capabilities = ["deny"]
+}
+path "platform/metadata/workloads/activity-core/llm-connect/llm-connect-provider-secrets" {
+  capabilities = ["read"]
+}
+
+# Capabilities introspection (no secret values)
+path "sys/capabilities-self" {
+  capabilities = ["update"]
+}
+path "auth/token/lookup-self" {
+  capabilities = ["read"]
+}