Individual skill
langchain-common-errors
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plugins/saas-packs/langchain-py-pack/skills/langchain-common-errors/SKILL.md
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- Last checked
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- 2,916
- Repository last updated
- Nov 12, 2026
- License
- MIT
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- ai Repository topic
- automation Repository topic
- claude-code Repository topic
- devops Repository topic
- mcp Repository topic
- ai-agents Repository topic
- anthropic Repository topic
- claude-code-plugins Repository topic
- developer-tools Repository topic
- llm Repository topic
- saas Declared skill tag
- langchain Declared skill tag
- langgraph Declared skill tag
- python Declared skill tag
- langchain-1.0 Declared skill tag
- errors Declared skill tag
- troubleshooting Declared skill tag
- debugging Declared skill tag
- testing Derived category
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SKILL.mdcore · 14,820 bytesSKILL.mdcore · 14,820 bytesSKILL.mdcore · 14,820 bytesSKILL.mdcore · 14,820 bytesSKILL.mdcore · 14,820 bytesSKILL.mdcore · 14,820 bytesSKILL.mdcore · 14,820 bytesreferences/errors/content-shape.mddoc · 7,426 bytesreferences/errors/graph-traps.mddoc · 9,657 bytesreferences/errors/import-migration.mddoc · 7,637 bytesreferences/errors/triage-decision-tree.mddoc · 7,087 bytesreferences/one-pager.mddoc · 2,658 bytes
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# LangChain Common Errors (Python)
## Overview
The same twelve-plus LangChain 1.0 / LangGraph 1.0 tracebacks show up every week
in production: `ImportError: cannot import name 'ChatOpenAI' from 'langchain.chat_models'`,
`AttributeError: 'list' object has no attribute 'lower'`, `GraphRecursionError:
Recursion limit of 25 reached`, `TypeError: Object of type datetime is not JSON
serializable`, `KeyError: 'question'` deep in LCEL internals. Stack traces are
ambiguous, docs sprawl across 0.2 / 0.3 / 1.0 eras, and engineers lose
30–90 minutes per incident re-deriving the fix.
This skill is a **paste-match catalog** of 14 entries (E01–E14) grouped into
3 reference files by category, plus a triage decision tree. Every entry opens
with the **exact exception class and message string** you see in your terminal,