langsmith-observability

Trace, evaluate, and monitor LLM applications with LangSmith observability.

Updated Jan 12, 2026
One-click install
npx skills add https://github.com/MesferAli/XCircle --skill langsmith-observability-mesferali
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: langsmith-observability
Source: https://github.com/MesferAli/XCircle/tree/main/.claude/skills/langsmith
Command: npx skills add https://github.com/MesferAli/XCircle --skill langsmith-observability-mesferali

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires langsmith, and includes references (resource) components.

What problem does it solve?

This Skill addresses the challenge of understanding, debugging, and improving Large Language Model (LLM) applications by providing comprehensive observability.

Core Features & Use Cases

  • Tracing: Captures detailed logs of LLM calls, chain executions, and tool usage, including inputs, outputs, latency, and costs.
  • Evaluation: Enables systematic testing and performance assessment of LLM outputs against datasets using built-in or custom evaluators.
  • Monitoring: Tracks key metrics, errors, and performance trends in production LLM systems.
  • Use Case: Debugging a complex LLM agent that is not performing as expected by tracing its execution flow, identifying faulty prompts or tool calls, and evaluating its responses against a benchmark dataset.

Quick Start

Set your LANGSMITH_API_KEY and LANGSMITH_TRACING environment variables, then use the @traceable decorator on your Python functions to automatically log their execution to LangSmith.

Frequently Asked Questions about langsmith-observability

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I debug LLM applications and trace execution flow?

Debug LLM applications by tracing execution flow to capture detailed logs of LLM calls, chain executions, and tool usage. You can identify faulty prompts or tool calls by reviewing inputs, outputs, latency, and costs captured during the trace.

How do I monitor production LLM systems and track performance metrics?

Monitor production LLM systems to track key metrics, errors, and performance trends. This observability provides visibility into your AI applications running in production, ensuring system reliability and highlighting operational issues.

Does LangSmith observability work with LangChain and LlamaIndex?

LangSmith observability works with LangChain and LlamaIndex for automatic tracing of LLM calls and chains. You can set the required environment variables and apply the traceable decorator to your Python functions to log executions.

What is the best way to evaluate LLM outputs against a dataset?

Evaluate LLM outputs against datasets by using built-in or custom evaluators for systematic testing. This enables performance assessment of your AI applications, allowing you to measure model responses against a benchmark dataset.

Why do I need observability for my AI applications?

Observability for AI applications is needed to understand, debug, and improve Large Language Model systems. It addresses the challenge of comprehending complex LLM behaviors by providing tracing, evaluation, and monitoring capabilities.