@rittels Could you please make your repositories as forks of the basic plugin repo and also add links to them in npm? It would be great for others to see the code and also rate your great plugins in Github.
My bad, sorry. Than you have to accept self signed SSL certificate. Copy paste from tutorial:
Now open your browser browser at https://localhost:9999/plugin.js to accept self signed SSL certificate.
Then open your browser at www.windy.com/dev to test your plugin.
If it fails, make sure that your plugin is correctly built and accessible with your browser at https://localhost:9999/plugin.js.