diff --git a/README.md b/README.md
index 39fda60..9dabb51 100644
--- a/README.md
+++ b/README.md
@@ -174,3 +174,5 @@ BloatBot runs on itself in CI — see [`.github/workflows/size.yml`](.github/wor
 ## License
 
 MIT OR Apache-2.0.
+
+<!-- BloatBot self-test PR: exercising the size workflow in real CI. -->