Language clarity - is there a convention?

This might just be my over-thinking, but time and time again I come up against recipes which confuse me because of lack of clarity around weights.

If recipe asks for "1kg of potatoes, peeled" does it mean "1kg of potatoes which are weighed unpeeled, but then please peel them" or "enough potatoes so that when you've peeled them the remainder weighs 1kg"?

Enough times it probably makes no difference, but for some vegetables there can be a lot of waste (and sometimes for meat joints too if the intent is to bone out the meat).

Is there a universally accepted interpretation of what a typical recipe writer means?