So knitloon on ravelry sent me a note about this:
She said she bought it as new stock a month ago. My pattern was published on Craft in March.
Of course the Chico’s one is pieced colorwork instead of top-down slip-stitch, but that would be necessary for mass production. The only design difference is the neckline, which I actually give instructions for on the ravelry page (the color notes are the original for the pattern, not for me to show emphasis now):
Now, maybe the Chico’s was inspired by the same random 40s children’s sweater I was. And maybe they decided it would make a good women’s sweater, and maybe they decided to change the pattern motif, ease, sleeve length and cuff length just like mine, and maybe this all happened after my pattern was published and without them seeing it. But really? Really, Chicos?