diff --git a/TODO b/TODO
index 84c5072..6e7cddf 100644
--- a/TODO
+++ b/TODO
@@ -3,6 +3,9 @@
 ### BACKEND
     *** Need to use thread-safe sessions per Thread, half-assed version did not work
 
+    * create A WalkTree( dir, func ) that calls func(file) per file ... for use
+    * in AI, but also maybe gen hash, etc.
+
 	* need a "batch" processing system that uses ionice to minimise load on mara and is threaded and used DB to interact with gunicorn'd pa
 
     * pa_job_manager, needs ai code