ai-agent

Build Resilient AI Agents with Langgraphjs

Name: Build Resilient AI Agents with Langgraphjs
Author: langchain-ai

Get a framework for language agents as graphs, ideal for founders building AI-powered tools, backed by 3.0k+ GitHub stars

From the repo · “Framework to build resilient language agents as graphs.”

intermediate⏱ 1-2 hours💵 Free (self-hosted)

3,370 stars+13★ this week611 forksTypeScriptGuide quality 9/10 · reviewed Jun 1Updated 10/22/2026100% free · open source

What it is

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

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."

Best insideClaude DesktopCodex CLI

When to use it

•When you need to create a conversational AI that can handle complex, open-ended user queries.
•When you want to build a language model that can learn from and adapt to new data and user interactions.
•When you're developing a chatbot or voice assistant that requires a high level of contextual understanding and conversational flow.

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

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

🛠️ Technical setup

Expect 20–40 minutes in a terminal — or let your AI agent drive it.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/langgraphjs && curl -fsSL https://workflowstacks.com/api/skills/langgraphjs/claude-skill -o ~/.claude/skills/langgraphjs/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

How Build Resilient AI Agents with Langgraphjs works

Codeflow

Free to inspect

Build Resilient AI Agents with Langgraphjs is a very large TypeScript project (~128k lines across 676 code files, plus 444 test files). It is a full software project: use it through its install path rather than reading it end to end. Last commit this month, MIT license, has a test suite.

Size

Very large codebase

~128k lines · 676 code files · days to read — use, don't read

Setup

Developer setup

A real software project. Use it via its install path; don't expect to read it all.

Runs on

Node.js

No API keys detected

TypeScript 98%Svelte 1%

Where to start reading

1
README.md
Start here — what it does and how to install it
2
AGENTS.md
The instructions the AI actually follows
3
package.json
Dependencies and the commands it exposes
4
internal/bench/README.md
Inside internal/ — the main logic begins here
5
examples/.gitignore
A worked example — copy this to get going

What's in each folder

internal/Core code — the actual logic81 files

examples/Examples you can copy389 files

docs/Documentation172 files

libs/Folder1292 files

scripts/Helper scripts2 files

.github/CI / automation (GitHub Actions)15 files

.changeset/Tool / agent settings4 files

.devcontainer/Editor / agent settings1 files

READMEHas testsDocumentedCI checksExamples includedMIT licenseUpdated this month

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

🛠️ Technical setup

Expect 20–40 minutes in a terminal — or let your AI agent drive it.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/langgraphjs && curl -fsSL https://workflowstacks.com/api/skills/langgraphjs/claude-skill -o ~/.claude/skills/langgraphjs/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

Quick Actions

Details

Creator

langchain-ai

Language

TypeScript

Do this with a working workflow

Pages we wrote and tested that put a skill like this to work — importable n8n templates, outcome guides and Claude Desktop configs.

Free n8n template

AI Support Agent (Chat)

A chat agent that answers customer questions from YOUR business info — with conversation memory. It never invents policies; anything it doesn't know, it hands to a human.