Wasn't sure that this was a rules question, so I am putting it here.
I have GM'ed a few times in my life, but I am by no means an expert...just a few sessions of D&D and some Cthulu. Generally I always assumed that they sold you overpriced cardboard called a GM's screen

so that the players wouldn't see exactly what was happening and you could surprise them/fudge things as needed.
For the 6E rules it would seem that it sometimes expects GM rolling/edge counts to be done in the open and other times not so much. A lot of edge spenders for would seem to indicate that the players know what their opponents have rolled; 1xEdge allows reroll of opponents die, 2 edge negates 1 opponent edge, 5 edge counts 2's for glitches for opponent.
And then for things like the baby monitor program/check OS action, it would seem that you are supposed to keep the # of hits against the defender a secret otherwise this would not be all that useful.
Anyway, I don't know if there is a correct rules answer to this one. What do you guys think? What have you been doing?