diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
new file mode 100644
index 00000000..78dc9f8e
--- /dev/null
+++ b/.github/CODEOWNERS
@@ -0,0 +1,4 @@
+# .github/CODEOWNERS
+# Required reviewers for the "main" and "release" rulesets
+# (require_code_owner_review is a no-op without this file).
+* @vistart