Langsmith Fetch
- 47 installs
- 2 repo stars
- Updated February 18, 2026
- langchain-ai/lca-skills
Helps with ai & agent building tasks.
About
langsmith-fetch is a Claude Code skill for ai & agent building. It helps solo builders move faster with AI-assisted development.
- langsmith-fetch
- AI & Agent Building
- AI-coding skill
Langsmith Fetch by the numbers
- 47 all-time installs (skills.sh)
- +1 installs in the week ending Aug 2, 2026 (Skillselion tracking)
- Ranked #7,551 of 16,546 AI & Agent Building skills by installs in the Skillselion catalog
- Data as of Aug 2, 2026 (Skillselion catalog sync)
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| Installs | 47 |
|---|---|
| repo stars | ★ 2 |
| Last updated | February 18, 2026 |
| Repository | langchain-ai/lca-skills ↗ |
What it does
Helps with ai & agent building tasks.
Files
Fetching LangSmith Traces
Requires langsmith-fetch in project dependencies and LANGSMITH_API_KEY in a .env file.
Setup
First, find the .env file containing LANGSMITH_API_KEY:
find . -name ".env" -type f 2>/dev/null | head -5Commands
Use --env-file <path-to-.env> with all commands:
# Fetch recent traces (uses LANGSMITH_PROJECT from .env, or specify --project-uuid)
uv run --env-file <path> langsmith-fetch traces ./traces --limit 10
uv run --env-file <path> langsmith-fetch traces ./traces --project-uuid <uuid> --limit 10
# Fetch single trace by ID
uv run --env-file <path> langsmith-fetch trace <trace-id>
# Include metadata (timing, tokens, costs)
uv run --env-file <path> langsmith-fetch trace <trace-id> --include-metadataOutput Formats
--format pretty- Human-readable (default)--format json- Pretty-printed JSON--format raw- Compact JSON for piping
Troubleshooting Workflow
1. Find .env: find . -name ".env" -type f 2>/dev/null 2. Fetch recent traces: uv run --env-file <path> langsmith-fetch traces ./debug --limit 10 3. Find relevant trace in saved JSON files 4. Check: What tools were called? What did they return? Was it correct/expected?
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