diff --git a/go.mod b/go.mod
index 7682972a..0102e6d1 100644
--- a/go.mod
+++ b/go.mod
@@ -1,4 +1,5 @@
 // CI probe: exercise Go env BuildKit cache without changing dependencies.
+// CI probe: verify reordered Go env cache keeps npm layers reusable.
 module github.com/pikasTech/HWLAB
 
 go 1.18