LangSmith - LLM Observability Platform Development platform for debugging, evaluating, and monitoring language models and AI applications. When to use LangSmith Use LangSmith when: - Debugging LLM application issues (prompts, chains, agents) - Evaluating model outputs systematically against datasets - Monitoring production LLM systems - Building regression testing for AI features - Analyzing latency, token usage, and costs - Collaborating on prompt engineering Key features: - Tracing : Capture inputs, outputs, latency for all LLM calls - Evaluation : Systematic testing with built-in and custo…