plugin-boilerplate

WordPress plugin boilerplate: PSR-4, PHP 8.4+, wp-env integration tests, PHPCS (WPCS/VIPCS/PHPCompatibility), Infection mutation testing, Rector. Maintained by GaryJones on GitHub, where it has earned 93 stars from the community.

It's actively developed around boilerplate, mutation-testing, php, and is a solid reference for anyone building with these tools.