Worked on the buildkite/agent repository to deliver enhanced observability and reliability in the checkout and execution paths. Focused on backend development using Go, the work introduced OpenTelemetry instrumentation to improve traceability and debugging efficiency. The approach consolidated error handling across hooks and commands, ensuring that span status reporting accurately reflected actual command errors rather than defaulting to misleading statuses. By refining error handling and integrating tracing, the changes provided more reliable diagnostics and streamlined the debugging process. This feature improved the overall robustness of the agent’s execution flow, leveraging Go’s strengths in backend systems and modern observability practices for production environments.