diff --git a/src/experimental/todo.txt b/src/experimental/todo.txt
new file mode 100644
index 00000000..b5a52e38
--- /dev/null
+++ b/src/experimental/todo.txt
@@ -0,0 +1,5 @@
+- deprecate polysections, use sweep.
+- deprecate trianglate, use tri_ear_clipping.
+- sort supports a list of ints?
+- dedup px_xxx?
+- px_union, px_intersection, px_difference?
\ No newline at end of file