diff --git a/src/transforms/clean.py b/src/transforms/clean.py
index bcb0123..f8b6385 100644
--- a/src/transforms/clean.py
+++ b/src/transforms/clean.py
@@ -1 +1,3 @@
 # src/transforms/clean.py — auto-generated stub
+
+# update 2 (2026-04)