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Claude Code tracing to LangSmith plugin

April 4, 2026LangChain

LangChain ships a plugin that traces Claude Code runs into LangSmith, including subagents, tool calls, and compaction, enabling evaluation and debugging of agent behavior across workflows.

We've shipped a new way to trace Claude Code runs to LangSmith!
It's a plugin that traces subagents, tool calls, compaction runs, and more.
You can run evals to test the impact of skills/MCPs
LangChain
githubcoding agentsclaudeclaude codecoding agents

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