Mary Liag contributed to the open-telemetry/opentelemetry-js-contrib repository by enhancing PostgreSQL observability in Node.js applications, focusing on ES module compatibility for pg-pool instrumentation. She addressed tracing gaps by ensuring the connect method was correctly wrapped across all import styles, using JavaScript and TypeScript to maintain reliability without altering the API surface. In addition, Mary implemented automated contributor feedback workflows across multiple OpenTelemetry repositories, leveraging GitHub Actions and YAML to streamline external contributor engagement and gather actionable feedback. Her work demonstrated a strong grasp of automation, instrumentation, and specification compliance, delivering targeted solutions that improved both developer experience and system reliability.