diff --git a/src/experimental/note.md b/src/experimental/note.md
index 90e20c74..5a7c5559 100644
--- a/src/experimental/note.md
+++ b/src/experimental/note.md
@@ -2,6 +2,7 @@ to_do:
 
 - deprecate paths2sections(paths) -> rails2sections(rails)
 - deprecate path_scaling_sections(shape_pts, edge_path) -> rail_extruded_sections(shape_pts, rail)
+- deprecate hull_polyline2d, hull_polyline3d -> polyline_join
 
 - angle_between adds a ccw param.