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LangChain and LangGraph error fix catalog v1.0.0

Use this resource to find the fix for a LangChain or LangGraph error from its traceback

New

  • 422 downloads
  • 189 likes
  • 168 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install langchain-traceback-fix-catalog

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent matches your traceback to one of the 14 catalog exceptions (import errors after migration, AttributeError on message content, KeyError in LCEL, GraphRecursionError, lost thread_id, JSON serialization, graphs that never reach END) and gives the matching fix.

Mostly picked by

Updated November 2, 2026

Card for the “LangChain and LangGraph error fix catalog” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

Similar resources

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What you get

  • SKILL.md : catalog, decision tree and fix examples
  • references/errors/import-migration.md : import errors and 0.3 to 1.0 migration
  • references/errors/graph-traps.md : agent graph traps

Good fit for

  • A LangGraph traceback shows GraphRecursionError
  • Your code breaks after upgrading to LangChain 1.0

Not for

    Tags

    • langchain
    • langgraph
    • debugging
    • migration

    About

    You say

    “Here is my traceback: ImportError on ChatOpenAI after the update. Give me the exact fix.”

    Card for the “LangChain and LangGraph error fix catalog” skill

    Skill published by Jeremy Longshore <jeremy@intentsolutions.io> under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to find the fix for a LangChain or LangGraph error from its traceback
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • references/errors/content-shape.md7.4 KB
    • references/errors/graph-traps.md9.7 KB
    • references/errors/import-migration.md7.7 KB
    • references/errors/triage-decision-tree.md7.1 KB
    • references/one-pager.md2.6 KB
    • SKILL.md14.8 KB

    Origin and licence

    Listed unmodified

    Author
    Jeremy Longshore <jeremy@intentsolutions.io>
    Source
    github.com/jeremylongshore/tons-of-skills-marketplace/tree/ab85a061f7bcc039dac13ee193de7a4cd4388571/skills/.curated/langchain-common-errors
    Licence
    MIT

    Notice

    « langchain-common-errors » (Jeremy Longshore <jeremy@intentsolutions.io>, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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