a production friendly way of making skeletons is to use minimal spanning tree to just grab a set of arbitrary points and build a skeleton from. then you can make super solid things like this:
all fun aside minimal spanning trees are great for building skeleton structures from unsorted points because you know that you get all the points and the hierarchy is logical and it always makes a valid skeleton.
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http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20252710/31/25/houdini_qrNQIGMFRV.mp4
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http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20252710/31/25/sop_mattias.minimalspanningtree.1.0.hdalc