diff --git a/TODO b/TODO
index e69de29..754be14 100644
--- a/TODO
+++ b/TODO
@@ -0,0 +1,7 @@
+Symbols
+-------
+
+- Must have LHS = # RHS is optional
+- Leading/trailing space around LHS/RHS ignore, within strings, preserved
+- Strings interpolated based on symbols seen *so far*, line by line
+- Can be used on both hostlistfiles and command files