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langchain-debug-bundle

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plugins/saas-packs/langchain-py-pack/skills/langchain-debug-bundle/SKILL.md

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Nov 12, 2026
License
MIT

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# LangChain Debug Bundle (Python)

## Overview

An on-call engineer pages you at 2am: the production agent loops, `ToolMessage`
outputs are empty strings, the user sees "I could not find the answer." Someone
asks the right question — *what state was the graph in when it gave up?* — and
there is no answer, because the terminal that caught the failure is already
gone, the Kubernetes pod has restarted, and the LangSmith URL was never
recorded.

This skill produces one artifact: a single `bundle-<incident_id>.tar.gz` (typically
1-10 MB) containing everything a second engineer needs to reproduce the failure
without a live terminal — environment and version manifest, filtered
`astream_events(version="v2")` JSONL, a propagating callback stack, the
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