Charles Larivière enhanced the DataDog/dd-trace-py repository by implementing generator function tracing support for tracer.wrap, addressing the need for accurate span context and trace duration reporting in both synchronous and asynchronous generators. Using Python and asynchronous programming techniques, he developed new wrapper functions to simplify instrumentation and reduce boilerplate for generator-heavy workloads. Charles expanded the test suite to validate end-to-end trace propagation and timing, ensuring reliability and alignment with repository standards. His work improved backend observability for generator-based patterns, demonstrating depth in tracing and backend development while focusing on maintainability and developer experience within the Python ecosystem.