Installing Sails.js required building and installing Node.js from source.
I let the source build overnight and then moments later ‘sails lift’ was functional.
https://github.com/tgraupmann/TAGENIGMA-Docs/blob/master/Sails.md
Also the reference guide is super helpful.
http://sailsjs.org/#!/documentation/reference/
Here is also a useful C# client:
https://github.com/Quobject/SocketIoClientDotNet