The VoiceSDK Toolkit (VSTK) is an open-source project aimed at sharing foundational assets, building blocks, and samples for common interactions when creating a custom voice experience using the Voice SDK. It’s intended to provide you with useful guidelines and ideas to inspire you to create new and unique voice interactions for your users. You will find that it’s most effective when used in collaboration with the Design Principles for Voice Interactions
Design Principles for Voice Interactions.