Generative UI with LangChain.js 🦜🔗

Overview

This application aims to provide a template for building generative UI applications with LangChain.js. It comes pre-built with a few UI features which you can use to play about with gen ui. The UI components are built using Shadcn.

Getting Started

Installation

First, clone the repository and install dependencies:

git clone https://github.com/bracesproul/gen-ui.git

cd gen-ui

yarn install

Next, if you plan on using the existing pre-built UI components, you'll need to set a few environment variables:

Copy the .env.example file to .env:

The OPENAI_API_KEY is required. LangSmith keys are optional, but highly recommended if you plan on developing this application further.

Get your OpenAI API key from the OpenAI dashboard.

Create a new GitHub PAT (Personal Access Token) with the repo scope.

Create a free Geocode account.

# ------------------LangSmith tracing------------------
LANGCHAIN_API_KEY=...
LANGCHAIN_CALLBACKS_BACKGROUND=true
LANGCHAIN_TRACING_V2=true
# -----------------------------------------------------

GITHUB_TOKEN=...
OPENAI_API_KEY=...
GEOCODE_API_KEY=...
FIRECRAWL_API_KEY=...

Running the Application

To run the application in development mode run:

yarn dev

This will start the application on http://localhost:3000.

To run in production mode:

yarn start

yarn build

Go further

If you're interested in ways to take this demo application further, I'd consider the following:

Generating entire React components to be rendered, instead of relying on pre-built components. OR: Using the LLM to build custom components using a UI library like Shadcn.
Multi-tool and component usage. Update the LangGraph agent to call multiple tools, and appending multiple different UI components to the client rendered UI.
Generative UI outside of the chatbot window. Have the UI dynamically render in different areas on the screen. E.g a dashboard, where the components are dynamically rendered based on the LLMs output.