Agent skill

langchain-agent

AI agent with tools (search, calculator) using LangGraph and AI SDK.

View SKILL.md on GitHub Repository
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Install this agent skill to your Project

npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/data/langchain-agent

SKILL.md

LangChain Agent

An AI agent with tools (search engine and calculator) powered by LangGraph and the Vercel AI SDK.

Tech Stack

  • Framework: Next.js
  • AI: LangChain.js, LangGraph, AI SDK
  • Database: PostgreSQL
  • Package Manager: pnpm

Prerequisites

  • PostgreSQL database
  • OpenAI API key

Setup

1. Clone the Template

bash
git clone --depth 1 https://github.com/Eng0AI/langchain-agent.git .

If the directory is not empty:

bash
git clone --depth 1 https://github.com/Eng0AI/langchain-agent.git _temp_template
mv _temp_template/* _temp_template/.* . 2>/dev/null || true
rm -rf _temp_template

2. Remove Git History (Optional)

bash
rm -rf .git
git init

3. Install Dependencies

bash
pnpm install

4. Setup Environment Variables

Create .env with required variables:

  • POSTGRES_URL - PostgreSQL connection string
  • OPENAI_API_KEY - OpenAI API key for the agent

Build

bash
pnpm build

Development

bash
pnpm dev

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