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Langfuse

Langfuse is the observability surface for traces, prompt versions, evaluations, and debugging AI behavior.

What to Monitor​

  • Agent and workflow traces.
  • Prompt versions and deployment changes.
  • Retrieval context included in model calls.
  • Tool calls, errors, latency, and cost signals.
  • Evaluation outcomes and user feedback.

Security Notes​

Traces may include prompts, retrieved text, or user data. Keep access controlled and avoid sending sensitive values in span attributes or logs.

Related pages: Mastra and AI Context Strategy.