import { PromptTemplate } from "@langchain/core/prompts"; TS2307: Cannot find module @langchain/core/prompts or its corresponding type declarations. IDE is webstorm

[GzRichChen]

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

import { PromptTemplate } from "@langchain/core/prompts";
TS2307: Cannot find module @langchain/core/prompts or its corresponding type declarations. IDE is webstorm

Error Message and Stack Trace (if applicable)

No response

Description

@langchain/core

System Info

yarn @langchain/core

[descampsk]

Same, i'm unable to import

import {
  ChatPromptTemplate,
  HumanMessagePromptTemplate,
  SystemMessagePromptTemplate,
} from '@langchain/core';

following the upgrade to 1.0.0

When trying to use dist/prompts

import {
  ChatPromptTemplate,
  HumanMessagePromptTemplate,
  SystemMessagePromptTemplate,
} from '@langchain/core/dist/prompts';

I have the following error :

Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: Package subpath './dist/prompts' is not defined by "exports" in /[REDACTED]/node_modules/@langchain/core/package.json

[hntrl]

@GzRichChen @descampsk could you confirm what your tsconfig.json, package.json and typescript versions looks like?

[GzRichChen]

{
"compilerOptions": {
"outDir": "dist",
"target": "es2022",
"useDefineForClassFields": true,
"module": "commonjs",
//"module": "esnext",
"moduleResolution": "nodenext",
"strict": false,
"exactOptionalPropertyTypes": false,
"jsx": "preserve",
"sourceMap": true,
"resolveJsonModule": true,
"esModuleInterop": true,
"lib": ["es2022", "dom"],
"baseUrl": "./",
"allowJs": true,
"forceConsistentCasingInFileNames": true,
"allowSyntheticDefaultImports": true,
"allowImportingTsExtensions": true,
"strictFunctionTypes": false,
"strictNullChecks":true,
"noUnusedLocals": false,
"noUnusedParameters": false,
"noImplicitAny": false,
"experimentalDecorators": true,
"emitDecoratorMetadata": true,
"skipLibCheck": true,
"paths": {
},
"typeRoots": ["./node_modules/@types/", "./types"]
},
"include": ["src//*", "types//.d.ts", "config/**/","locales/","upload/**/","seeders/**/*"],
"exclude": ["dist", "node_modules", "lib"]
}

[descampsk]

{
  "compilerOptions": {
    "module": "commonjs",
    "declaration": true,
    "removeComments": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "allowSyntheticDefaultImports": true,
    "resolveJsonModule": true,
    "target": "ES2021",
    "sourceMap": true,
    "outDir": "./dist",
    "baseUrl": "./",
    "incremental": true,
    "skipLibCheck": true,
    "strictNullChecks": true,
    "noImplicitAny": true,
    "strictBindCallApply": true,
    "forceConsistentCasingInFileNames": true,
    "noFallthroughCasesInSwitch": true,
    "noUncheckedIndexedAccess": true,
    "paths": {
      "@root/*": ["./src/*"],
      "@app/*": ["./src/app/*"],
      "@core/*": ["./src/core/*"],
      "@infra/*": ["./src/infra/*"],
      "@commander/*": ["./src/commander/*"],
    },

    "inlineSources": true,

    // Set `sourceRoot` to  "/" to strip the build path prefix
    // from generated source code references.
    // This improves issue grouping in Sentry.
    "sourceRoot": "/"
  },
  "ts-node": {
    // Do not forget to `pnpm add -D tsconfig-paths`
    "require": ["tsconfig-paths/register"]
  }
}

"typescript": "5.9.3"

[RaphaelMelanconAtBentley]

Same kind of issues while trying to upgrade to 1.0.0.
I am dual-building for both ESM and CJS, but with @langchain/core@1.0.0 I now get this issue when trying to build for CommonJS:

Code:

import { RunnableConfig } from "@langchain/core/runnables";

tsconfig:

{
  "extends": "./node_modules/@itwin/build-tools/tsconfig-base.json",
  "compilerOptions": {
    "alwaysStrict": true,
    "declaration": true,
    "declarationMap": true,
    "esModuleInterop": false,
    "experimentalDecorators": true,
    "forceConsistentCasingInFileNames": true,
    "incremental": true,
    "inlineSources": true,
    "jsx": "react",
    "noFallthroughCasesInSwitch": false,
    "noImplicitAny": true,
    "noImplicitOverride": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noUnusedLocals": false,
    "noUnusedParameters": true,
    "skipLibCheck": true,
    "strict": true,
    "strictNullChecks": true,
    "stripInternal": false,
    "target": "ES2023",
    "lib": ["ES2023", "DOM", "DOM.Iterable", "ESNext.Disposable"]
    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true,
    "sourceMap": true,
    "module": "commonjs",
    "moduleResolution": "node10",
    "resolveJsonModule": true
  },
  "include": ["./src/**/*.ts", "./src/**/*.tsx", "./global.d.ts"]
}

Error:

error TS2307: Cannot find module '@langchain/core/runnables' or its correspond
ing type declarations.
  There are types at '<...>/node_modu
les/@langchain/core/dist/runnables/index.d.ts', but this result could not be resolved under your current 'moduleRes
olution' setting. Consider updating to 'node16', 'nodenext', or 'bundler'.

1 import { RunnableConfig } from "@langchain/core/runnables";

[kpsajesh]

Try this, it is restructured to langchain_core
from langchain_core.prompts import PromptTemplate

Summary received from chat GPT (I used 2 of them and worked for me)

Old Import (pre-v1.0	New Import (v1.0+)	Required Package
from langchain.prompts import PromptTemplate	from langchain_core.prompts import PromptTemplate	langchain-core
from langchain.text_splitter import RecursiveCharacterTextSplitter	from langchain_text_splitters import RecursiveCharacterTextSplitter	langchain-text-splitters
from langchain.llms import OpenAI	from langchain_community.llms import OpenAI	langchain-community
from langchain.embeddings import HuggingFaceEmbeddings	from langchain_huggingface import HuggingFaceEmbeddings	langchain-huggingface

[hntrl]

Hey all! This is a known regression that impacts dependents that use an older moduleResolution setting in tsconfig. We'll work to get a fix out for this ASAP!

[voodooattack]

Can't migrate our huge project to ESM at this point in prod, so I had to spend a lot of time figuring this one out.

Here is a temporary workaround for those stuck with the same issue and trying to build without a bundler:

You can add @langchain/* to "paths" in tsconfig.json to get tsc to build your project. Sadly, you have to do it per individual package.

{
  "compilerOptions": {
    "module": "commonjs",
    "moduleResolution": "node",
    "paths": {
      "@langchain/core/*": ["node_modules/@langchain/core/dist/*"],
      "@langchain/community/*": ["node_modules/@langchain/community/dist/*"],
      "@langchain/langgraph/*": ["node_modules/@langchain/langgraph/dist/*"],
      "@langchain/openai/*": ["node_modules/@langchain/openai/dist/*"],
      "@langchain/classic/*": ["node_modules/@langchain/classic/dist/*"],
    },
}

You can add more of the packages as needed using this pattern.

This works with with tsc as version 5.9.3