fix(langchain): add explicit langgraph-prebuilt dependency #33812
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Fixes langchain-ai#33804 ## Problem Users installing langchain 1.0.3 encountered a ModuleNotFoundError when importing from langgraph.prebuilt.tool_node, even though langgraph>=1.0.2 was correctly specified as a dependency. While langgraph 1.0.2 declares langgraph-prebuilt>=1.0.2 as a dependency, in certain installation scenarios (particularly with pip), transitive dependencies may not be properly resolved. ## Solution Add langgraph-prebuilt>=1.0.2,<1.1.0 as an explicit direct dependency in langchain's pyproject.toml. This ensures the package is always installed regardless of dependency resolution order or package manager behavior. ## Testing - Verified imports work: from langgraph.prebuilt.tool_node import ToolNode - Verified create_agent() works correctly with the dependency - All local imports and basic functionality tests pass 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
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Problem
Users installing langchain 1.0.3 encountered a ModuleNotFoundError when importing from langgraph.prebuilt.tool_node, even though langgraph>=1.0.2 was correctly specified as a dependency.
While langgraph 1.0.2 declares langgraph-prebuilt>=1.0.2 as a dependency, in certain installation scenarios (particularly with pip), transitive dependencies may not be properly resolved.
Solution
Add langgraph-prebuilt>=1.0.2,<1.1.0 as an explicit direct dependency in langchain's pyproject.toml. This ensures the package is always installed regardless of dependency resolution order or package manager behavior.
Testing