To contribute some code to the project, you will need to submit a GitHub Pull Request (a.k.a PR). Please familiarize yourself with how that works (see GitHub Pull Requests)
You should follow the project's code style, and pre-check your code before submitting a PR. The GitHub project is set up with some Actions that will check that a PR passes at least the basic tests and complies with the coding style, but it is still recommended to check that for yourself before submitting a PR.
To run the basic checks (essentially: running the tests, the linter, and the formatter), use the project.pre-commit invoke command, and address any issues found:
$ invoke project.pre-commit