I've recently wanted to contribute, and have, but developed in the @NativeScript folder under node_modules.
It has been impossible to build the core for me since I usually work on windows and for now (I know there is a PR to solve this) the core cannot be built on windows.

It is very uncomfortable to work on some of the core having to enter node_modules/@nativescript of my sample application and with each change I make I have to stop the app and start it. (I think it has to be more agile than I am doing)

Also, I have seen the interactive window and it seems good to me, but I think that for someone who just wants to test what they are doing in the core it is too much, at least without a documentation that says what each thing is for.

This RFC proposes:

• Clear and concise documentation for new developers about the fastest way to develop (using the core) new functionality or fix.
• Documentation on how to add unit test or integration.
• Windows support.