To work on the template locally, you can call the copier template directly. Note that by default, copier uses the latest tag in your commit history. To ensure it uses the latest commit on your current active branch use:
copier copy -r HEAD /path/to/your/template destination-dir
If you want to test it against the latest tag in your local commit history, you can use:
copier copy /path/to/your/template destination-dir
You can use Hatch to run all of the tests for the template:
hatch run test:run