Worked on enhancing type safety in the facebook/fbthrift repository by delivering a feature focused on type-safe Thrift serialization and LazyAny deserialization. The approach consolidated class instantiation from string representations, reducing the risk of runtime errors during data deserialization. Implemented codemods and refactored existing code to enable robust string-to-class conversion, refining implicit string handling throughout the serialization workflow. The work emphasized backend development using PHP, with a strong focus on type safety to improve reliability and developer productivity. No major bug fixes were reported, as the primary goal was to strengthen the safety and maintainability of serialization and deserialization processes.