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ai-agent

Build Resilient AI Agents with Langgraphjs

Get a framework for language agents as graphs, ideal for founders building AI-powered tools, backed by 3.0k+ GitHub stars
intermediateโฑ 1-2 hours๐Ÿ’ต Free (self-hosted)
3,111 stars520 forksTypeScriptQuality 9/10Updated 7/9/2026100% free ยท open source
What it is

Build and manage AI agents as graphs using the Langgraphjs framework.

What you can make with it

Automations like: when a user mentions a specific product, generate a related article on your website.

How it helps

Create resilient AI agents with Langgraphjs to handle complex conversations, reduce maintenance, and improve user experience.

Real use case example

"A founder wants to create an AI-powered support chat. She sets up an agent using Langgraphjs, connects it to her website's API, and defines conditions for automated responses based on user input. With Langgraphjs, she can update or remove nodes easily, ensuring the chat remains functional and user-friendly."

If you're new

Pick this up when working on AI-powered projects, and you want to build robust, maintainable, and scalable agents.

If you're senior

Reach for Langgraphjs when building large-scale, customer-facing AI applications that require flexibility and adaptability.

Common confusion cleared up

Langgraphjs is not a complete AI solution, but rather a framework to build and manage AI agents; it's meant to be combined with other tools and technologies to create a comprehensive AI application.

Best inside these AI tools
Claude DesktopCodex CLI
Pairs with
GPT (ChatGPT)Claude APIStrapi API
Why we list it on WorkflowStacks: Langgraphjs is included in this marketplace because it's a free, open-source framework ideal for founders building AI-powered tools.
What it does

Langgraphjs allows you to build and train language agents that can understand and respond to user input in a more flexible and resilient way by representing their knowledge as graphs.

When to use it
  • โ€ขWhen you need to create a conversational AI that can handle complex, open-ended user queries.
  • โ€ขWhen you want to build a language model that can learn from and adapt to new data and user interactions.
  • โ€ขWhen you're developing a chatbot or voice assistant that requires a high level of contextual understanding and conversational flow.
Quick start
  1. 1Install langgraphjs using npm by running `npm install langgraphjs` in your terminal.
  2. 2Import the library in your TypeScript project and create a new language agent using the `LangGraph` class.
  3. 3Define the nodes and edges of your graph by creating `Node` and `Edge` objects and adding them to your language agent.
  4. 4Train your language agent using a dataset of user interactions and evaluate its performance using metrics such as accuracy and F1 score.
Ready-to-paste prompt
const { LangGraph } = require('langgraphjs'); const graph = new LangGraph(); graph.addNode({ id: 'hello', text: 'Hello, how are you?' }); graph.addEdge({ from: 'hello', to: 'goodbye', text: 'Goodbye!' });
Saves to your device

Topics

agents
ai
artificial-intelligence
generative-ai
llm
node
typescript
What's inside โ€” free to inspect
No purchase needed

Read the entire source before you build โ€” unlike paid marketplaces that hide it behind a buy button.

15
top-level files
10
folders
38.6M
repo size
MIT
license
Key files
package.json
README.md
tsconfig.json
File tree
.changeset/
.devcontainer/
.github/
.vscode/
.yarn/
docs/
examples/
internal/
libs/
scripts/
.gitignore
.oxfmtrc.jsonc
.oxlintrc.jsonc
CLAUDE.md
CONTRIBUTING.md
deno.json
int-test-deps-docker-compose.yml
LICENSE
package.json
pnpm-lock.yaml
pnpm-workspace.yaml
README.md
socket.yml
tsconfig.json
Quick Actions
Details
Creator
langchain-ai
Language
TypeScript
Category
ai-agent
Published
1/9/2024

Are you the creator of this tool? Claim your listing โ†’ and earn 85% of every sale.

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