diff --git a/.agents/skills/homelab-knowledge/SKILL.md b/.agents/skills/homelab-knowledge/SKILL.md
new file mode 100644
index 0000000..22e4cae
--- /dev/null
+++ b/.agents/skills/homelab-knowledge/SKILL.md
@@ -0,0 +1,76 @@
+---
+name: homelab-knowledge
+description: Query and maintain the shared homelab-wiki when working on homelab services, infrastructure, architecture, operations, or current service status. Use it to gather existing context before work and to keep durable knowledge synchronized after relevant changes; do not use it for unrelated software work or as a substitute for commit and PR history.
+---
+
+# Homelab Knowledge
+
+Use `homelab-wiki` as the shared long-lived knowledge base for people and agents. Search it directly with `rg`; do not introduce a search index, vector database, or generated copy of the wiki.
+
+## Locate the wiki
+
+Resolve the checkout in this order:
+
+1. `$HOMELAB_WIKI_PATH`, when set.
+2. A sibling directory named `homelab-wiki` next to the current repository.
+3. `/home/panxiao81/homelab-wiki` when it exists.
+
+If no checkout is available, report that constraint. Do not silently skip the knowledge step, clone a repository, or create a replacement wiki without the user's authorization.
+
+Before using the wiki, read its `AGENTS.md` completely. For edits, also read `README.md` and `CONTRIBUTING.md` completely and follow any more specific instructions associated with the target page.
+
+## Gather context
+
+At the beginning of a homelab task:
+
+1. Derive search terms from the component name, service aliases, hostnames, Kubernetes resources, configuration keys, error text, and task intent.
+2. Use `rg -n -i` in the wiki to find candidate pages. Prefer several precise searches over reading the whole repository.
+3. Follow the wiki's task index, service index, architecture constraints, source records, and verification conflicts when they are relevant.
+4. Read the closest authoritative pages and their material links before making decisions. Also read the corresponding source repository README or runbook when changing an implementation.
+5. Distinguish documented design, declared configuration, deployment history, live verification, and work currently in progress. Do not present one as another.
+
+For questions about current project or service status, first obtain the maintainer's current-work and ticket context as required by the wiki, unless the conversation already provides that authorization and scope. Reading documentation does not authorize live-system inspection.
+
+Answer read-only questions from the evidence found. Include paths or links that let the user verify important claims, and state when evidence may be stale or conflicting.
+
+## Maintain knowledge after changes
+
+For any code, configuration, infrastructure, or operational change, perform a documentation-impact check before declaring the task complete.
+
+Update the wiki in the same task when the change affects durable knowledge such as:
+
+- service purpose, lifecycle, entry point, authentication, permissions, dependencies, or first-use path;
+- architecture boundaries or accepted constraints;
+- deployment ownership or persistent operating behavior;
+- troubleshooting, recovery, verification, or maintenance procedures;
+- the addition, replacement, or retirement of a service.
+
+Keep one-time progress, implementation narration, and release-by-release history in commits, PRs, or tickets. Do not copy them into the wiki unless they change a durable stage summary. Implementation-specific parameters may remain in the source repository README or runbook when the wiki convention says to link rather than duplicate them.
+
+When editing:
+
+1. Inspect both the source-repository diff and the wiki working tree before writing. Preserve unrelated user changes in both repositories.
+2. Update the page closest to the fact first, then only the navigation, indexes, constraints, or verification records that the wiki rules require.
+3. Preserve evidence metadata. Never advance `last_verified` without performing the stated live verification; ordinary review may update only fields permitted by the wiki.
+4. Link related source commits, PRs, or paths when available. Clearly mark uncommitted sources and unfinished cross-repository synchronization.
+5. Record conflicts rather than resolving them by assumption. Ask before live inspection or before choosing among materially conflicting current-state claims.
+6. Keep credentials, tokens, private keys, Terraform state, secret values, and sensitive command output out of documentation. Never read or copy known sensitive files merely to improve the wiki.
+
+Wiki edits are a separate repository change. Do not commit, push, open a PR, or modify a live system unless the user has authorized that action.
+
+## Verify and report
+
+After editing the wiki, run from its root:
+
+```bash
+python3 scripts/check_docs.py
+git diff --check
+```
+
+If the checker itself changed, also run:
+
+```bash
+python3 -m unittest discover -s tests -v
+```
+
+In the final response, report source-repository changes and wiki changes separately, including validation performed and anything still awaiting verification or cross-repository linkage. If no wiki update was needed, state the concrete reason; do not merely say that documentation was unaffected.
diff --git a/CLAUDE.md b/CLAUDE.md
index 41a27d8..b4946ed 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -50,6 +50,9 @@ netboot.xyz appliance — i.e. the single point of failure for most of the lab.
 - Network devices (VyOS) use `ansible.netcommon.network_cli`, not ssh/python — they have no
   Python interpreter. Prefer `vyos_config` with explicit `set` lines over the collection's
   resource modules, which lag upstream syntax.
+  ⚠ `cli-shell-api showConfig --show-active-only --show-cfg1 load-balancing` 在现场并未
+  限定为 LB 子树，而是输出完整配置（含密钥）。不要把尾随节点名当作过滤条件；
+  先在路由器端严格提取所需配置段，再返回输出，不将完整配置送入工具日志。
   ⚠ A set-lines-only role **cannot change a multi-value node** — `set` appends. Changing
   e.g. `option wins-server` or `name-server` leaves the old value live *and* saved to
   `config.boot`; the diff only shows the addition, so it reads as a clean replace. Grep the
diff --git a/apps/authelia/values.yaml b/apps/authelia/values.yaml
index 71e90bd..38b8bd3 100644
--- a/apps/authelia/values.yaml
+++ b/apps/authelia/values.yaml
@@ -201,6 +201,22 @@ configMap:
             # additionalSecrets entry lands at /secrets/<its own name>.
             path: '/secrets/authelia-oidc-jwks/main.pem'
       clients:
+        - client_id: 'backstage'
+          client_name: 'Backstage'
+          client_secret: '$pbkdf2-sha512$310000$gddaWiXG/xDzda/oRqCibw$MVYwCrDBKi1S4K0/l/O1lNPcH14WmQEb1dIJ48Rs2lrfk9m9dp22s9dFjBelVTzKEyzMwBA2t3eAUmMiu.TiFg'
+          public: false
+          authorization_policy: 'two_factor'
+          claims_policy: 'gitea'
+          require_pkce: false
+          token_endpoint_auth_method: 'client_secret_basic'
+          redirect_uris:
+            - 'https://backstage.ad.ddupan.top/api/auth/oidc/handler/frame'
+          scopes:
+            - 'openid'
+            - 'profile'
+            - 'email'
+            - 'groups'
+          userinfo_signed_response_alg: 'none'
         - client_id: 'gitea'
           client_name: 'Gitea'
           # pbkdf2-sha512 hash of the plaintext secret Gitea holds (gitea-keycloak-secret).
diff --git a/infrastructure/dns/records.yml b/infrastructure/dns/records.yml
index c7d3dd9..875ef40 100644
--- a/infrastructure/dns/records.yml
+++ b/infrastructure/dns/records.yml
@@ -27,6 +27,7 @@ homelab_dns:
       - { zone: ad.ddupan.top, name: zot, type: A, values: [192.168.10.127] }
       - { zone: ad.ddupan.top, name: zot-push, type: A, values: [192.168.10.127] }
 
+      - { zone: ad.ddupan.top, name: backstage, type: A, values: [192.168.10.127] }
       - { zone: ad.ddupan.top, name: pg-prod, type: A, values: [192.168.10.2] }
       - { zone: ad.ddupan.top, name: pg-dev, type: A, values: [192.168.10.127] }