diff --git a/ci/deploy-client.sh b/ci/deploy-client.sh
index 52d0ad6..c22267f 100755
--- a/ci/deploy-client.sh
+++ b/ci/deploy-client.sh
@@ -21,5 +21,9 @@ echo "Building client with VITE_SERVER_URL=${VITE_SERVER_URL}..."
 pnpm --filter @cv/client build
 
 echo "Deploying to Cloudflare Pages project '${PAGES_PROJECT}'..."
+# --branch=main promotes to production. Tag-push runs are detached-HEAD;
+# without this wrangler falls back to `head` and Pages deploys as preview.
+# See CVG-128.
 npx wrangler pages deploy apps/client/dist \
-  --project-name="${PAGES_PROJECT}"
+  --project-name="${PAGES_PROJECT}" \
+  --branch=main