diff --git a/tsa/howto/template.mdwn b/tsa/howto/template.mdwn
index 5f6c3a4312f110c67c2330f80d75528213276e36..c685aa484c0b098bdd6a6d69cb93d15c51eb1fd1 100644
--- a/tsa/howto/template.mdwn
+++ b/tsa/howto/template.mdwn
@@ -35,6 +35,9 @@
 <!-- "architectural" document, which the final result might differ -->
 <!-- from, sometimes significantly -->
 
+<!-- a good guide to "audit" an existing project's design: -->
+<!-- https://bluesock.org/~willkg/blog/dev/auditing_projects.html -->
+
 ## Issues
 
 <!-- such projects are never over. add a pointer to well-known issues -->