Error loading "langsmith" package with the simplest langchain 1.0.1 scaffold

[ddewaele]

Checked other resources

• This is a bug, not a usage question. For questions, please use the LangChain Forum (https://forum.langchain.com/).
• I added a very descriptive title to this issue.
• I searched the LangChain.js documentation with the integrated search.
• I used the GitHub search to find a similar question and didn't find it.
• I am sure that this is a bug in LangChain.js rather than my code.
• The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package).

Example Code

package.json

{
  "name": "langgraphjs-v1",
  "version": "1.0.0",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "type": "module",
  "author": "",
  "license": "ISC",
  "description": "",
  "dependencies": {
    "langchain": "^1.0.1",
    "langsmith": "^0.3.74"
  }
}

code

import * as hub from "langchain/hub";
import { Client } from "langsmith";

const prompt = await hub.pull("test-mustache-format",{
    includeModel: false,
});

Error Message and Stack Trace (if applicable)

Error: Error loading "langsmith" package, install it via `npm install langsmith` before you use this function.
Error: (0 , import_range.require_range) is not a function
    at loadLangSmith (/Users/davydewaele/Projects/AgenticAI/langgraph-tutorial/langgraphjs-v1/node_modules/.pnpm/langchain@1.0.1_@langchain+core@1.0.1/node_modules/langchain/dist/hub/base.js:102:9)
    at async basePull (/Users/davydewaele/Projects/AgenticAI/langgraph-tutorial/langgraphjs-v1/node_modules/.pnpm/langchain@1.0.1_@langchain+core@1.0.1/node_modules/langchain/dist/hub/base.js:24:17)
    at async Module.pull (/Users/davydewaele/Projects/AgenticAI/langgraph-tutorial/langgraphjs-v1/node_modules/.pnpm/langchain@1.0.1_@langchain+core@1.0.1/node_modules/langchain/src/hub/index.ts:40:24)
    at async <anonymous> (/Users/davydewaele/Projects/AgenticAI/langgraph-tutorial/langgraphjs-v1/index.ts:4:16)

Node.js v20.17.0

Description

Expected these 5 lines of code to work with 1.0.1
Works fine with

  "dependencies": {
    "@langchain/core": "0.3.72",
    "langchain": "0.3.36"
  }

The same issue was logged (and apparently fixed in 1.0.0-alpha) #9049
However in the current main branch this fix is no longer present (probably due to changes in the build system)

System Info

System Info
OS : Mac
Node v20
Package manager npm

[jdtzmn]

Went ahead and opened a PR to fix this, inspired by the PR which fixed the issue last time: #9059

[TimofeyBiryukov]

Experiencing this issue as well.