[I work on the Chakra team] So yes, for now Node-ChakraCore repo is accepted as part of the Node.js foundation and is being kept up to date with the master. We are also collaborating with several Node core members in order to carefully understand and plan the best way to bring it to the mainline. This effort is called VM Neutrality (or Multi-VM) for Node. You can find out more about this here https://github.com/nodejs/vm