Marcos focused on code maintenance and DevOps for the schneems/php-src repository, addressing infrastructure alignment with current PHP support policies. He upgraded the minimum PHP version in the run-tests.php script from 7.4.0 to 8.0.0, ensuring the test suite runs exclusively on supported runtimes. This PHP-focused change improved CI reliability and reduced future technical debt by enabling earlier detection of compatibility issues. Marcos optimized the CI workflow by using commit message conventions to skip unnecessary runs for infrastructure-only updates. His work, primarily in PHP and DevOps, strengthened the repository’s maintenance posture without altering production behavior or introducing new features.