diff --git a/scripts/check-srv-qa-route-drift.ts b/scripts/check-srv-qa-route-drift.ts
index e00b32bd2..edc0118bd 100644
--- a/scripts/check-srv-qa-route-drift.ts
+++ b/scripts/check-srv-qa-route-drift.ts
@@ -112,6 +112,12 @@ const ALLOWLIST_ONLY_ON_SRV: Record<string, string> = {
     'Channel-detail publish rendering (channels-hub Phase 2) — renders per-channel BLOB pages ' +
     'into a publish session for the public /channels/:slug/ detail surface. Not a ' +
     'tutorial-draft author-preview endpoint; the QA channel has no channel-detail publish flow.',
+  'GET /content/channel-detail/:slug':
+    'CAP-served /channels/{slug}/ detail pages (channels-hub Phase 2) — a public prod content ' +
+    'surface (channel- prefixed BLOBs, lowercase-canonicalize + 301) that mirrors ' +
+    'GET /content/topics/:slug, not tutorial-draft author preview. It is the serve counterpart ' +
+    'to POST /content/publish/render-channels above (already allowlisted); the QA channel serves ' +
+    'in-flight tutorials from -Contribution repos and has no channel-detail serve/publish flow.',
   'POST /content/orphan-purge':
     'CI-only batched soft-delete for prod content maintenance (#823). Not an author-preview ' +
     'endpoint — the QA channel has no orphan-purge maintenance flow.',