Nice finished rocking chair. I say finished because completing some things for my wifey generally get put aside, ( I gots too many irons in the fire). Did you wedge tennon the legs to the rockers? keep up the nice work. Tim
The leg/rocker connection is simply a 3-1/2" screw driven up from the underside of the rocker, counterbored and plugged with a face-grain oak plug.
The only mortise and tenon joints are those between the seatback rails and the back legs, also where the back slats fit into the
seatback rails. And the where the front rail joins the front legs.
The seat, being such a wide expanse of solid wood and subject to seasonal movement, is not fixed left and right to legs. Instead, its corners are housed in stopped dados that will allow shrinkage and expansion.
The seat is kept centered by a pocket screw up thru the back side of the front rail and up into the seat.