Langfuse SDK Patterns

Overview

Production-quality patterns for the Langfuse SDK: singleton clients, the observe wrapper, startActiveObservation for nested traces, session tracking, graceful shutdown, and error-safe tracing.

Prerequisites

• Completed langfuse-install-auth setup
• Understanding of async/await patterns
• For v4+: @langfuse/tracing, @langfuse/otel, @opentelemetry/sdk-node

Instructions

Pattern 1: Singleton Client with Graceful Shutdown