Worked on stabilizing OpenTelemetry tracing for the langwatch/langwatch repository, focusing on resolving a critical issue with global NodeTracerProvider registration in Next.js 15 environments. Addressed a bug that caused missing spans by explicitly registering the provider after SDK initialization and enhancing detection of the concrete provider through inspection of the _delegate property, which also covered ProxyTracerProvider scenarios. This solution, implemented in TypeScript and leveraging both Next.js and Node.js, improved the reliability of observability by reducing tracing gaps in production. The work ensured that spans are exported correctly, supporting more accurate end-to-end monitoring for deployed applications.