A skeleton example to create a Cake3 plugin.
- CakePHP 3.X
To include your badges in your Readme, you can just copy all those badges and replace by Name/AwesomePlugin : https://raw.githubusercontent.com/Xety/Cake3-Sluggable/master/README.md
If you want customize your badges : http://shields.io
To use Packagist, you will need to submit your plugin on their website, and enable the Packagist service hook in your repository Settings.