The Cortana Skills Kit allows developers to make use of services and/or bots created with the Microsoft Bot Framework and publish them to Cortana as a new skill. Developers using the kit also will have the option of repurposing code from existing Alexa skills.
Cortana has a long way to go to match rival Alexa on the skills front. Amazon opened up Alexa to developers a year and a half ago, allowing them to build new Alexa features that work with Amazon's Echo, Dot, Tap, and other third-party devices. There are already 10,000 skills available for Alexa, according to a recent Wired article.
During a recent Windows Developer Day webcast, Microsoft officials said the Cortana Skills Kit would go to public preview on February 27. When I asked Microsoft again if today was the day, a spokesperson sent me the following: "We are finessing the final details of the Cortana Skills Kit and it will be available soon."
Microsoft's Language Understanding Intelligent Service (LUIS), which allows apps to communicate with people in the way they actually speak, would be an interesting add-in. LUIS, which is currently in preview, is designed to add language understanding to apps.
Other speech-related Microsoft Cognitive Services, such as its Custom Speech Service and Speaker Recognition interfaces, both of which are in preview, would also be interesting additions for those building Cortana skills.
Try these fun (and completely useless) Amazon Alexa commands: