Construct paths counter-clockwise
Construct your paths counter-clockwise (anti-clockwise). You have to pick a direction anyway, and going counter-clockwise is a bit of a convention.
This applies both to naming points (specifically the control points of curves) and the order in which you define your points.
Obviously, the order in which you add points to your code needs to take a backseat to the logic of your code. But typically what you’re doing is constructing an outline of (a part of) a garment.
So pick a point, and make your way around counter-clockwise.
When naming control points for curves, re-use the name of the point they are attached to
Cp1 to the control point before and
Cp2 to the control point after the point if,
once again, you follow your path counter-clockwise.
part.paths.seam = new Path() .move(points.hemCenter) .line(points.hemSide) .line(points.waistSide) .curve(points.waistSideCp2, points.armholeCp1, points.armhole)
Constructing a path counter-clockwise will also ensure that the path offset goes outwards rather than inwards.