Collin developed OpenTelemetry instrumentation for Prefect Flow runs in the PrefectHQ/prefect repository, enabling comprehensive end-to-end observability of flow executions. He integrated OTEL tracing directly into the flow engine, allowing flow states, errors, and timeouts to be emitted as events within spans for improved diagnostics and reduced mean time to resolution. Collin extended the FlowRun schema with labels to capture richer context and designed a thorough test suite in Python to validate both successful and exceptional execution paths. His work demonstrated depth in distributed tracing, observability, and testing, providing a robust foundation for monitoring and troubleshooting Prefect workflows.