langchain-retrieval-agent

Original：🇺🇸 English

Translated

AI agent with retrieval tool for document Q&A using RAG and LangGraph.

1installs

Sourceeng0ai/eng0-template-skills

Added on2026-02-07

NPX Install

npx skill4agent add eng0ai/eng0-template-skills langchain-retrieval-agent

SKILL.md Content

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LangChain Retrieval Agent

An AI agent with retrieval tool for document Q&A using RAG, powered by LangGraph.

Tech Stack

Framework: Next.js
AI: LangChain.js, LangGraph, AI SDK
Vector Store: Supabase pgvector
Package Manager: pnpm

Prerequisites

Supabase project with pgvector extension
OpenAI API key

Setup

1. Clone the Template

bash

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

If the directory is not empty:

bash

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

```
SUPABASE_URL
```
- Supabase project URL
```
SUPABASE_PRIVATE_KEY
```
- Supabase service role key
```
OPENAI_API_KEY
```
- For embeddings and LLM

Build

bash

pnpm build

Development

bash

pnpm dev

langchain-retrieval-agent

NPX Install

Tags

SKILL.md Content

LangChain Retrieval Agent

Tech Stack

Prerequisites

Setup

1. Clone the Template

2. Remove Git History (Optional)

3. Install Dependencies

4. Setup Environment Variables

Build

Development