Before committing any changes, make sure that pre-commit can run.
pre-commit install
You'll also need PHP and composer to manage associated packages.
brew install php@8.3
wget https://raw.githubusercontent.com/composer/getcomposer.org/f3108f64b4e1c1ce6eb462b159956461592b3e3e/web/installer -O - -q | php --
Finally install composer dependencies:
php composer.phar install
Adding new dev dependencies:
# Example, how php-cs-fixer was added
php composer.phar require --dev friendsofphp/php-cs-fixer
Please make sure to follow Wordpress plugin readme file standard and update the readme.txt when necessary.