diff --git a/cmd/review-bot/validatedocmap.go b/cmd/review-bot/validatedocmap.go
index 2283c1f..6b86b07 100644
--- a/cmd/review-bot/validatedocmap.go
+++ b/cmd/review-bot/validatedocmap.go
@@ -65,6 +65,7 @@ func validateDocmapPath(localPath, resolvedRoot string) error {
 	return nil
 }
 
+// runValidateDocmap implements the `review-bot validate-docmap` subcommand.
 //
 // It reads changed file paths from stdin (one per line, as produced by
 // `git diff --name-only`), parses a doc-map YAML file, and performs two checks: