diff --git a/TODO b/TODO
index e69de29..6bff189 100644
--- a/TODO
+++ b/TODO
@@ -0,0 +1,7 @@
+- guard rail tests for nonexistent lookups in manager classes
+- custom exception for nonexistent Entity ID
+- custom exception for nonexistent Component ID
+- test component activation
+- test component deactivation
+- test component removal
+- test entity destroy