It is recommended to use this template and to name the extension_xxx repository.
The template contains an example script for initializing the extension in QWAT. You can also take an example from qwat/extension_sire.
If you want to test your code with Travis CI, you have the pre-configured scripts at your disposal. For this step you must declare the CI in your project and generate a token and declare it in Travis under the name GH_TOKEN.