During July 2025, Yuan Chang enhanced observability and logging across DataDog’s dd-trace-rb, dd-trace-go, and documentation repositories. Yuan addressed a sampling configuration issue in Ruby by updating the Environment Logger to accurately report sampling rules and fallback to defaults when needed, improving system diagnostics. In Go, Yuan reduced trace retry log noise by modifying the logging mechanism to report only every fifth error, streamlining error handling and log analysis. Additionally, Yuan contributed to Java tracer documentation by introducing a configuration option for 404 status naming, expanding trace data flexibility. The work demonstrated depth in Ruby, Go, documentation, and logging practices.