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LangSmith integration

Fanar can integrate with LangSmith for agent prompt management and workflow tracing.

Environment variables​

LANGSMITH_API_KEY=your_langsmith_api_key_here
LANGSMITH_PROJECT_NAME=fanar-agent
LANGSMITH_ENABLED=true

Add these to your .env file alongside other Fanar settings.

Behavior​

  • Prompts — agents fetch prompts from LangSmith Hub with a 24-hour Redis cache, falling back to local fallback_prompts.py if unavailable.
  • Tracing — when enabled, LangGraph workflow steps are traced to the configured LangSmith project for debugging and evaluation.

LangSmith is optional but recommended for production agent workloads.