diff --git a/src/transforms/clean.py b/src/transforms/clean.py
index f8b6385..4872128 100644
--- a/src/transforms/clean.py
+++ b/src/transforms/clean.py
@@ -1,3 +1,5 @@
 # src/transforms/clean.py — auto-generated stub
 
 # update 2 (2026-04)
+
+# update 15 (2026-04)