Warning
Deprecation Notice (November 2026): Breadboard and Project Opal are graduating out of Google Labs and will be sunset on November 17, 2026.
- Hosted Services: Web access via opal.google.com, breadboard-ai.web.app, and backend execution services will turn off on November 17, 2026.
- User Files: Saved workflow files are stored in JSON format inside your personal Google Drive (
My Drive > Opal). We recommend copying any prompt text you wish to keep before November 17, or downloading the JSON files from Drive anytime after to view in any plain text editor. - Where to Build Next: Try Skills in Gemini for chat automations, or Google AI Studio for advanced model prompting and multi-step workflows.
- Repository Status: This repository will be placed in read-only / archived mode on November 17, 2026.
- For full details, please see the Opal FAQ.
A library for prototyping generative AI applications.
Inspired by hardware makers who make amazing things with physical breadboards and off-the-shelf parts, Breadboard is a library that tries to recreate that same spirit. It simplifies prototyping generative AI applications, helping people to easily "wire" together, experiment with, and share modular components, fostering creativity and collaboration.
Breadboard's design emphasizes two key properties:
- Ease and flexibility of wiring. Make wiring prototypes easy and fun.
- Modularity and composability. Easily share, remix, reuse, and compose prototypes.
The best way to get going with Breadboard is to use the Visual Editor.
Our documentation site also has a number of guides aimed at helping you build an understanding of several key aspects of Breadboard. Here are a few that are useful if you're new to Breadboard.
- Getting Started. A lightweight introduction to the Visual Editor and how to run a simple board.
- Build a Librarian with the Agent Kit. A guide to using the Breadboard Agent Kit (a collection of helpful components for dealing with LLMs) to make a virtual librarian that makes book recommendations.
- Visual Editor User Guide. A walkthrough of the features in the Visual Editor.
If there is a guide or documentation you feel is unclear or missing, please do file a bug or let us know on Discord.
Firstly, thank you for considering making a contribution to Breadboard - we would love to accept your patches and contributions to this project!
We recommend filing a bug before making any PRs so we can agree on the best approach together before making changes.
Please also look over our Contributing Guide, and our Code of Conduct, too.
Breadboard is organized as a monorepo, with packages designed to do a specific task. Some of these packages are published to npm for others to use "out of treee", and others are unpublished. When developing Breadboard, however, npm will use packages from within the monorepo when a given package depends on another.
See DEVELOPING.md for more information on the various packages within Breadboard, and how to work with them.
Please note that Breadboard requires Node version >=v20.14.0.
Please note that this is not an official Google product.