Fix: Add langsmith to import map to resolve Issue #9049

[akintunero]

Fix: Add langsmith to import map to resolve Issue #9049

Problem
In version 1.0.0-alpha.5, users experience errors when using the pull() function from langchain/hub:

Error loading "langsmith" package, install it via npm install langsmith
Error: require_range is not a function. (In 'require_range()', 'require_range' is undefined)

The issue occurs because langsmith components are not properly available in the import map during deserialization.

Solution

Added langsmith entry to extraImportMapEntries in langchain.config.js to ensure langsmith components are properly resolved in the import map.

Changes

• Added langsmith entry to extraImportMapEntries (lines 358-362):

  {
    modules: ["Client"],
    alias: ["langsmith"],
    path: "langsmith",
  }

• Ensures langsmith components are available during deserialization
• Maintains backward compatibility

Testing

• ✅ Import map contains langsmith entry
• ✅ Hub pull function works without errors
• ✅ Agent creation works with langsmith components
• ✅ Serialization/deserialization works properly

Impact

• Resolves the specific error mentioned in issue loadLangSmith in 1.0.0-alpha.5 has incorrect langsmith import path #9049
• Improves robustness of hub functionality
• Prevents similar import path issues in the future

Fixes #9049

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Latest commit: 272d3c3

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[christian-bromann]

LGTM 👍

Thank you!