How Can I Add a Custom Addon to Consuming App

I know that with ember install you can use ember install https://github.com/<repo-username>/<repo-name>.git. I’m not sure if this works when using addAddonsToProject but I think it might.

I would try:

afterInstall: function (options) {
  return this.addAdddonsToProject({
    packages: [
      'https://github.com/<repo-username>/<repo-name>.git'
    ]
  });
}

Also, as mentioned in the Welcome to the Ember.js Discussion Forum: