a long search I actually found some braid scissors that work.
blade scissors, that cut any braid, silk or monofilament, even worn or relaxed. The
secret of these scissors lies in the combination of a notched blade that
prevents the braid from skidding and
a smooth counter blade that shears even a very small length of relaxed braid.
this with one hand
ends for safety
blade in unalterable Japanese ceramics, close to diamond hardness
and thick, the blades can withstand a drop of 1 metre on to concrete
reinforced with nylon
see Video link to see just how easy to use they are.