Particle developers should visit our particle developer website instead of reading this document which is more geared towards Arcs core system developers.
Note that you need a recent version of Node because we use new ES6 features. v9 is definitely OK.
$ ./tools/install
$ ./tools/test
From the directory above the arcs directory:
$ python -m SimpleHTTPServer 5001 &
$ open 'http://localhost:5001/arcs/shell/apps/web/index.debug.html'