During July 2025, contributed to the phpstan/phpstan-src repository by addressing a type-related bug in the functionMap.php file. The work focused on correcting the documented return type of the bzdecompress function to include int alongside string and false, ensuring alignment between documentation, code, and actual runtime behavior. This change improved the accuracy of PHPStan’s static analysis, reducing the risk of type confusion and runtime errors for projects relying on strict type checks. The contribution demonstrated careful code documentation and type hinting within a PHP codebase, emphasizing disciplined change management and a focus on type system reliability in static analysis tooling.