diff --git a/cache/doc.go b/cache/doc.go
new file mode 100644
index 0000000..cd4040b
--- /dev/null
+++ b/cache/doc.go
@@ -0,0 +1,3 @@
+package cache
+
+// Cache package cribbed from https://varunksaini.com/tiered-cache-in-go/ whom i have i high respect for as a former colleague.