LangChain

pip install trulayer langchain

npm install @trulayer/sdk langchain

import os
import trulayer

trulayer.init(api_key=os.environ["TRULAYER_API_KEY"], project_name="my-app")
trulayer.instrument_langchain()

import { TruLayer, instrumentLangchain } from "@trulayer/sdk";

const tl = new TruLayer({
  apiKey: process.env.TRULAYER_API_KEY!,
  projectName: "my-app",
});

instrumentLangchain(tl);

from langchain_openai import ChatOpenAI
from langchain_core.prompts import ChatPromptTemplate

prompt = ChatPromptTemplate.from_messages([("user", "{question}")])
chain = prompt | ChatOpenAI(model="gpt-4o-mini")

chain.invoke({"question": "What is the capital of France?"})
# A trace appears in the dashboard with one `chain` span and one `llm` child.

import { ChatOpenAI } from "@langchain/openai";
import { ChatPromptTemplate } from "@langchain/core/prompts";

const prompt = ChatPromptTemplate.fromMessages([["user", "{question}"]]);
const chain = prompt.pipe(new ChatOpenAI({ model: "gpt-4o-mini" }));

await chain.invoke({ question: "What is the capital of France?" });