In this seamless-style raglan cardigan, the sleeves are knit in the round & the body is knit flat. The sleeves are knit “inside-out” with the cable detail worked over a band of purl stitches, as the finished sweater body is reverse-stockinette. Once the sleeves & body are joined, the yoke of the sweater is knit flat. All shaping is worked on the “wrong” side of the piece, in knit stitches.
More info on my blog.