fix: route OpenBao platform administration login

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a0290b-3241-74c3-b868-6049545af836

wiki/playbooks/openbao-platform-admin-login.md

@@ -0,0 +1,53 @@
+# OpenBao platform-admin login
+
+## Worker checklist
+
+Use this lane only for an attended OpenBao control-plane operation whose
+reviewed procedure requires `platform-admin`, such as configuring a database
+secrets-engine connection, policies, auth roles, or token roles. It is not a
+workload KV-read lane and it does not provision a secret value.
+
+1. Plan the exact administration need before drafting any operator step:
+
+   ```bash
+   warden plan "attended OpenBao platform administration for <reviewed operation>" --json
+   ```
+
+   The result must select `openbao-platform-admin-login`, return
+   `founder_required`, and name one `oidc_login` act. If it selects
+   `openbao-api-key`, a workload role, paste-once provisioning, or root, stop and
+   report a routing defect.
+
+2. The operator performs the one identity act through KeyCape OIDC/MFA:
+
+   ```bash
+   bao login -no-print -method=oidc -path=netkingdom role=platform-admin
+   ```
+
+   `-no-print` is mandatory. Do not paste a token into chat, State Hub, a shell
+   argument, or a temporary handoff file. Root is offline break-glass authority,
+   not a fallback for an OIDC or callback failure.
+
+3. Verify authority using metadata or capabilities only, never by reading a
+   secret value. Then run only the separately reviewed owner procedure. For the
+   database engine this procedure lives in `rapp-postgres`; the login does not
+   itself approve configuration changes.
+
+4. Revoke the attended token when the reviewed operation and its non-secret
+   verification are complete:
+
+   ```bash
+   bao token revoke -self
+   ```
+
+If browser login fails before authentication, confirm the `netkingdom` auth
+mount, `platform-admin` role, and allowed callback with `railiance-platform` and
+`key-cape`. Do not retry with a workload-specific OIDC role: it is intentionally
+incapable of OpenBao control-plane administration.
+
+## Authority
+
+- OpenBao policy and role owner: `railiance-platform/docs/openbao.md`
+- Human identity and MFA provider: key-cape / Keycloak
+- Database-engine procedure owner: `rapp-postgres`
+- Routing decision and founder-act surface: WARDEN-WP-0029