Jack studs not nailed to header

thats it, just a few toe nails

that wouldve failed an inspection

Here in Florida some inspectors and architects require a flat strap that goes from the header across the jack and king studs tying them all together. I think that is a bit of overkill, at least in a remodel, since the rest of the house was done to older codes, but I was once required to do that for a slider install. Not just that, but I had to tie all the jacks and kings together at the base with 5/8" bolts connecting to a heavy duty "L" brace that was then attached through the floor to the bottom of the 14" rim joist that ran 2 feet under the house with threaded rod and base plates. I imagined that if a hurricane ever destroyed that house that all else would be gone, but the door would still be standing there in the middle of the debris.