LLM Adapters
LangChainAdapter
Copilot Runtime adapter for LangChain.
Copilot Runtime adapter for LangChain.
Example
import { CopilotRuntime, LangChainAdapter } from "@copilotkit/runtime";
import { ChatOpenAI } from "@langchain/openai";
const copilotKit = new CopilotRuntime();
const model = new ChatOpenAI({
model: "gpt-4o",
apiKey: "<your-api-key>",
});
return new LangChainAdapter({
chainFn: async ({ messages, tools }) => {
return model.bindTools(tools).stream(messages);
// or optionally enable strict mode
// return model.bindTools(tools, { strict: true }).stream(messages);
}
});The asynchronous handler function (chainFn) can return any of the following:
- A simple
stringresponse - A LangChain stream (
IterableReadableStream) - A LangChain
BaseMessageChunkobject - A LangChain
AIMessageobject
Constructor Parameters
chainFn(parameters: ChainFnParameters) => Promise<LangChainReturnType>required
A function that uses the LangChain API to generate a response.
