Скиллы LangSmith

---
name: langsmith-trace
description: "INVOKE THIS SKILL when working with LangSmith tracing OR querying traces. Covers adding tracing to applications and querying/exporting trace data. Uses the langsmith CLI tool."
---

<oneliner>
Two main topics: **adding tracing** to your application, and **querying traces** for debugging and analysis. Python and Javascript implementations are both supported.
</oneliner>

<setup>
Environment Variables

```bash
LANGSMITH_API_KEY=lsv2_pt_your_api_key_here          # REQUIRED
LANGSMITH_PROJECT=your-project-name                   # Optional: default project
LANGSMITH_WORKSPACE_ID=your-workspace-id              # Optional: for org-scoped keys
```

Authentication is REQUIRED: either set the `LANGSMITH_API_KEY` environment variable, or pass the `--api-key` flag to CLI commands (preferred):
```bash
langsmith trace list --project my-project --api-key $LANGSMITH_API_KEY
```

**IMPORTANT:** Always check the environment variables or `.env` file for `LANGSMITH_PROJECT` before querying or interacting with LangSmith. This tells you which project contains the relevant traces and data. If the LangSmith project is not available, use your best judgement to identify the right one.

CLI Tool
```bash
curl -sSL https://raw.githubusercontent.com/langchain-ai/langsmith-cli/main/scripts/install.sh | sh
```
</setup>

<trace_langchain_oss>