- lib/guard.ts: pure checks (isNoindex with Nitro route-rule patterns,
findOffenders over the app's ssr flag, every merged route rule,
.client.vue pages and experimental.inlineRouteRules)
- module options seo.noindexRoutes and seo.indexable; declared noindex
routes get X-Robots-Tag: noindex, nofollow through their route rule
- a production build fails with the D-70 message; nuxt dev and
nuxt prepare only warn
- testing/guard-check.mjs builds four fixture apps (guard:check)
