Ben Barclay developed run-level metrics annotation for the PsycheFoundation/psyche repository, enabling per-run observability and business analytics across the stack. He introduced a run_id field to the ServiceInfo struct and ensured its propagation through client, server, example, and logging modules, allowing unique identification of each run in system metrics. By updating the OpenTelemetry collector configuration to tag metrics with run_id, Ben established end-to-end traceability and supported data-driven troubleshooting. His work demonstrated depth in Rust, system design, and observability, delivering cross-layer instrumentation that supports business-level analytics and faster issue diagnosis without introducing bugs or regressions during the development period.