diff --git a/todo.cfg b/todo.cfg
new file mode 100644
index 0000000..5e35825
--- /dev/null
+++ b/todo.cfg
@@ -0,0 +1,2 @@
+export TODO_DIR="."
+export TODO_FILE="$TODO_DIR/todo.txt"
diff --git a/todo.txt b/todo.txt
new file mode 100644
index 0000000..c023562
--- /dev/null
+++ b/todo.txt
@@ -0,0 +1 @@
+implement dominator tree for control flow