Worked on internal maintenance and code quality improvements for the symfony/symfony and laravel/framework repositories, focusing on PHP back end development and unit testing. Delivered targeted test suite cleanups by removing unused variables and imports, which improved code readability and reduced cognitive load for future contributors. Enhanced in-code documentation, including updating docblocks to accurately reference contracts, thereby minimizing confusion and supporting maintainability. These changes did not alter user-facing behavior but established a stronger baseline for future enhancements. The technical approach emphasized non-behavioral refinements, leveraging skills in code cleanup, documentation, and PHP to streamline ongoing development and facilitate more reliable testing.