Worked on preparing the microsoftgraph/msgraph-sdk-php and microsoftgraph/msgraph-beta-sdk-php repositories for PHP 8.4 compatibility by updating CI/CD workflows and refining core components. Focused on the GraphRequestAdapter, introducing a nullable httpClient parameter to align with upcoming PHP language changes while maintaining backward compatibility. Leveraged PHP and YAML to update the CI validation matrix, ensuring that both stable and beta SDKs are tested against PHP 8.4. This approach strengthened test coverage, reduced migration risk, and preserved consistent adapter behavior across repositories. The work addressed both feature implementation and bug resolution, demonstrating attention to compatibility and robust release engineering practices.