diff --git a/docs/preview-smoke-test.md b/docs/preview-smoke-test.md
new file mode 100644
index 0000000..08e77de
--- /dev/null
+++ b/docs/preview-smoke-test.md
@@ -0,0 +1,6 @@
+# Temporary preview deployment check
+
+This temporary PR verifies the owner-authorized Pages preview, its bot comment,
+the DEV PREVIEW title and banner, and removal after closing the PR.
+
+Close this PR after verification; this document is not intended for merging.