pestphp/pest ? reverse-engineered prompt

Build me an elegant testing framework for PHP that feels simple to use and pleasant to read.

I want developers to be able to write tests in a clean, expressive style, run them easily from the command line, and get clear failures when something breaks. It should work as a proper package people can install in existing PHP projects, with sensible defaults, good docs, and reliable test coverage for the framework itself.

Please make it feel modern and polished, not noisy or complicated. If you need to check current PHP testing conventions or related docs online, go ahead. Also make sure the project is ready for real world use, so it should include the usual pieces for configuration, examples, and automated checks.