Hazel Bachrach developed OpenTelemetry Ruby gRPC Client Instrumentation for the Shopify/opentelemetry-ruby-contrib repository, focusing on enhancing observability and traceability for Ruby-based gRPC clients. She implemented a new client interceptor that captures and exports gRPC client requests and responses as traces, supporting configurable peer service names and allowed metadata headers. Using Ruby and leveraging her expertise in instrumentation and gRPC, Hazel ensured the solution robustly handles both successful calls and gRPC-specific errors, tagging traces appropriately for improved troubleshooting. This work laid a foundation for broader instrumentation across Ruby services, enabling faster investigation and cross-service correlation without introducing separate bug fixes.