This blog post provides a comprehensive guide on implementing observability in applications using Node.js and the Llama Stack, with a focus on OpenTelemetry and distributed tracing. It explains key concepts of observability, sets up Jaeger for trace visualization, and details code modifications for instrumenting Node.js applications to enhance monitoring. This resource is part of a series meant for developers interested in AI and Node.js integration, emphasizing practical applications and hands-on experiments.