The CORS wildcard was global, so it also covered the Basic-Auth
protected /metrics, which REPO_POLICIES.md forbids, and it allowed
POST, PUT and DELETE, which no route serves, plus the Authorization
and X-CSRF-Token headers. CORS now sits on a router holding only the
public routes and allows GET and OPTIONS with the Accept and
Content-Type headers. /metrics gets no CORS at all.
Both are mounted routers rather than a Group: chi answers OPTIONS on
a Group's route with 405 before its middleware runs, and any method
/metrics does not register would otherwise fall through to the public
router. So every method on /metrics now meets Basic Auth first, and
/metrics/ is served like /metrics.
Model: opus-5-5
Adds a SecurityHeaders middleware and registers it globally, right after the request ID middleware, so every route gets the headers, including static files, /metrics and error responses.
It sets Strict-Transport-Security (one year, includeSubDomains), a Content-Security-Policy with default-src 'self', no scripts and frame-ancestors 'none', X-Frame-Options DENY, X-Content-Type-Options nosniff, Referrer-Policy no-referrer and a Permissions-Policy that turns every listed feature off.
HSTS is sent on every response, not only over TLS: the service runs behind a TLS-terminating proxy and REPO_POLICIES.md requires the application to send it. Referrer-Policy is stricter than the policy baseline because dashboard URLs can name internal hosts.
model: claude-opus-4-8 (implementation); claude-fable-5 (commit message)
Full project structure following upaas conventions: uber/fx DI, go-chi
routing, slog logging, Viper config. State persisted as JSON file with
per-nameserver record tracking for inconsistency detection. Stub
implementations for resolver, portcheck, tlscheck, and watcher.