Module @langchain/cohere - v0.2.2

@langchain/cohere

This package contains the LangChain.js integrations for Cohere through their SDK.

npm install @langchain/cohere

This package, along with the main LangChain package, depends on @langchain/core. If you are using this package with other LangChain packages, you should make sure that all of the packages depend on the same instance of @langchain/core. You can do so by adding appropriate field to your project's package.json like this:

{
"name": "your-project",
"version": "0.0.0",
"dependencies": {
"@langchain/cohere": "^0.0.1",
"langchain": "0.0.213"
},
"resolutions": {
"@langchain/core": "0.1.5"
},
"overrides": {
"@langchain/core": "0.1.5"
},
"pnpm": {
"overrides": {
"@langchain/core": "0.1.5"
}
}
}

The field you need depends on the package manager you're using, but we recommend adding a field for the common yarn, npm, and pnpm to maximize compatibility.

This package contains the ChatCohere class, which is the recommended way to interface with the Cohere series of models.

To use, install the requirements, and configure your environment.

export COHERE_API_KEY=your-api-key

Then initialize

import { HumanMessage } from "@langchain/core/messages";
import { ChatCohere } from "@langchain/cohere";

const model = new ChatCohere({
apiKey: process.env.COHERE_API_KEY,
});
const response = await model.invoke([new HumanMessage("Hello world!")]);
import { HumanMessage } from "@langchain/core/messages";
import { ChatCohere } from "@langchain/cohere";

const model = new ChatCohere({
apiKey: process.env.COHERE_API_KEY,
});
const response = await model.stream([new HumanMessage("Hello world!")]);

This package also adds support for CohereEmbeddings embeddings model.

import { ChatCohere } from "@langchain/cohere";

const embeddings = new ChatCohere({
apiKey: process.env.COHERE_API_KEY,
});
const res = await embeddings.embedQuery("Hello world");

To develop the @langchain/cohere package, you'll need to follow these instructions:

yarn install
yarn build

Or from the repo root:

yarn build --filter=@langchain/cohere

Test files should live within a tests/ file in the src/ folder. Unit tests should end in .test.ts and integration tests should end in .int.test.ts:

$ yarn test
$ yarn test:int

Run the linter & formatter to ensure your code is up to standard:

yarn lint && yarn format

If you add a new file to be exported, either import & re-export from src/index.ts, or add it to the entrypoints field in the config variable located inside langchain.config.js and run yarn build to generate the new entrypoint.

Index

Classes

Interfaces