During November 2025, Michael Bennewitz focused on backend development in the phpstan/phpstan-src repository, addressing type safety and API clarity in PHP code. He delivered a targeted fix to the pcntl_signal_get_handler function, updating its return type to accurately reflect all possible values returned at runtime. This adjustment improved the reliability of static analysis and clarified the function’s contract for users. Working primarily with PHP and leveraging his backend expertise, Michael’s contribution enhanced code maintainability by ensuring the implementation aligned with declared type contracts. His work demonstrated careful attention to detail and a strong understanding of type systems in PHP projects.