This is a project that has Dataforged as a dependency, and tries to build a Typescript project using it. Currently it's set up to pull directly from the GitHub source, since there's no NPM package just yet.
Probably the easiest way to develop on dataforged using this as a test bed is to link your local dataforged into the node_modules directory:
$ ln -s /path/to/dataforged node_modules/dataforged