langsmith-debugger

What problem does it solve?

This Skill helps you investigate why a LangGraph agent system behaved incorrectly by turning raw LangSmith traces into actionable debugging insight. It is designed for diagnosing failures, slowdowns, confusing outputs, and unexpected orchestrator or analyst decisions.

Core Features & Use Cases

• Trace Lookup: Find recent runs by project, status, tags, or latency to quickly locate suspicious executions.
• Failure Analysis: Inspect inputs, outputs, errors, and parent-child spans to understand where a run broke down.
• Pattern Comparison: Compare orchestrator and analyst behavior across runs to spot recurring weaknesses or performance gaps.
• Use Case: If an analyst returns a poor recommendation, use this Skill to trace the evidence gathered, the options generated, and the upstream knowledge gaps that shaped the response.

Quick Start

Run the query script with your LangSmith API key, tenant ID, and project ID to list recent runs for the target project.