fix: Update LangChain imports for v1.x compatibility#2700
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hayescode merged 3 commits intoChainlit:mainfrom Dec 4, 2025
Merged
fix: Update LangChain imports for v1.x compatibility#2700hayescode merged 3 commits intoChainlit:mainfrom
hayescode merged 3 commits intoChainlit:mainfrom
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Fixes Chainlit#2607 - Replace deprecated `langchain.*` imports with `langchain_core.*` - Updates imports for Run, dumps, and BaseMessage - Resolves ModuleNotFoundError when using LangchainCallbackHandler with LangChain v1.x
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hayescode
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Dec 4, 2025
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Fixes #2607
langchain.*imports withlangchain_core.*Note: This PR uses the correct
langchain_core.tracers.schemas.Runimport, which is part of LangChain's core tracer interface. Another PR (#2695) useslangsmith.schemas.Run, butlangchain_coreis the proper source as it contains the base abstractions that LangChain's callback system is built on, whilelangsmithis specifically for the LangSmith monitoring service integration.Summary by cubic
Updated LangChain imports to use langchain_core so the LangchainCallbackHandler works with LangChain v1.x. Fixes #2607 by resolving ModuleNotFoundError from deprecated langchain.* imports (dumps, BaseMessage, Run).
Written for commit 7fed064. Summary will update automatically on new commits.