Amazon says it is making the "architecture, starter code, and learnings" from Alexa for Shopping available to third-party retailers, starting with Kate Spade (Annie Palmer/CNBC)

Annie Palmer / CNBC: Amazon says it is making the “architecture, starter code, and learnings” from Alexa for Shopping available to third-party retailers, starting with Kate Spade — Amazon has been using homegrown artificial intelligence technology to help users compare products and buy or reorder items on their behalf.