diff --git a/src/eval/plots.py b/src/eval/plots.py
index d193436..80cd034 100644
--- a/src/eval/plots.py
+++ b/src/eval/plots.py
@@ -1,3 +1,5 @@
 # src/eval/plots.py — auto-generated stub
 
 # update 5 (2026-04)
+
+# update 18 (2026-04)