Originally Posted by
yaychemistry
It appears that KS had taken over by the time I flew out of BOS for Memorial Day weekend. AS is still in terminal A, at the same gates as before (near the Harpoon brewery).
When I was checking my bag, it looked like several employees were undergoing training. I bet the AS agent that the OP interacted with was an AS employee on temporary assignment in BOS to train the KS agents.
Apparently the trainer on temporary assignment assisted my husband along with one of the new agents. The two (the trainer and the other agent) were also at the gate when the BOS-PDX flight boarded, so my husband was able to thank them again for their help with his carry-on.