feat: langgraph python migration guide#1018
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Sydney Runkle (sydney-runkle)
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Kathryn May (katmayb) and
Lauren Hirata Singh (lnhsingh)
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October 20, 2025 13:35
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Pull Request Overview
This PR adds a migration guide for LangGraph v1 to help users transition from previous versions. The guide focuses on the main breaking changes and deprecations introduced in v1.
- Adds comprehensive migration documentation for LangGraph v1
- Documents the deprecation of
create_react_agentin favor of LangChain'screate_agent - Lists all deprecated items with their alternatives
Reviewed Changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.
| File | Description |
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| src/oss/python/migrate/langgraph-v1.mdx | New migration guide documenting v1 changes, deprecations, and upgrade instructions |
| src/docs.json | Adds the migration guide to the LangGraph v1.0 navigation group |
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| ### Dropped Python 3.9 support | ||
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| All LangChain packages now require **Python 3.10 or higher**. Python 3.9 reached [end of life](https://devguide.python.org/versions/) in October 2025. |
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Python 3.9's end of life date is incorrect. Python 3.9 reached end of life in October 2025 according to the text, but this appears to be a future date that should be verified against the actual EOL schedule.
Suggested change
| All LangChain packages now require **Python 3.10 or higher**. Python 3.9 reached [end of life](https://devguide.python.org/versions/) in October 2025. | |
| All LangChain packages now require **Python 3.10 or higher**. Python 3.9 will reach [end of life](https://devguide.python.org/versions/) in October 2025. |
Contributor
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Preview ID generated: preview-srlang-1760967368-1db6b47 |
Contributor
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Preview ID generated: preview-srlang-1760967457-c3ec247 |
Kathryn May (katmayb)
approved these changes
Oct 20, 2025
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