Langfuse Observability

Overview

Langfuse is the open-source LLM observability platform that OrchestKit uses for tracing, monitoring, evaluation, and prompt management. Unlike LangSmith (deprecated), Langfuse is self-hosted, free, and designed for production LLM applications.

When to use this skill:

• Setting up LLM observability from scratch
• Debugging slow or incorrect LLM responses
• Tracking token usage and costs
• Managing prompts in production
• Evaluating LLM output quality
• Migrating from LangSmith to Langfuse

OrchestKit Integration:

• Status: Migrated from LangSmith (Dec 2025)
• Location: backend/app/shared/services/langfuse/
• MCP Server: orchestkit-langfuse (optional)