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Interesting having the headsail tac on the leeward hull. Quite simple really to tack as only requires the existing sheet line coming hard up onto a block on each hull but I don't really understand the boom/yoke extension which seems to function as an outhaul for the second batten up.
Also bit hard to see if the forestay arrangement is std.

It looks more like an air brake than a spinnaker, particularly in the shot from the lee bow. Fast small-cat kites are normally very flat, and this setup makes the sail set very deep a lot of the time no matter how flat the cut is. The boat's rated slower than the non-foiling F16, the closest comparable seahugging design, which isn't a great indicator of rig efficiency.