cavepediav2/web

Cavepedia Web

Next.js frontend with integrated LangGraph agent for Cavepedia.

Project Structure

web/
├── src/              # Next.js application
├── agent/            # LangGraph agent (Python)
│   ├── main.py       # Agent graph definition
│   ├── langgraph.json
│   ├── pyproject.toml
│   └── Dockerfile    # Production container
└── ...

Prerequisites

• Node.js 24+
• Python 3.13
• npm
• Google AI API Key (for the LangGraph agent)

Development

1. Install dependencies

npm install

This also installs the agent's Python dependencies via the install:agent script.

2. Set up environment variables

# Agent environment
cp agent/.env.example agent/.env
# Edit agent/.env with your API keys

3. Start development servers

npm run dev

This starts both the Next.js UI and LangGraph agent servers concurrently.

Agent Deployment

The agent is containerized for production deployment.

Building the Docker image

cd agent
docker build -t cavepediav2-agent .

Running in production

The agent requires PostgreSQL and Valkey for persistence and pub/sub:

docker run \
  -p 8123:8000 \
  -e REDIS_URI="redis://valkey:6379" \
  -e DATABASE_URI="postgres://user:pass@postgres:5432/langgraph" \
  -e GOOGLE_API_KEY="your-key" \
  -e LANGSMITH_API_KEY="your-key" \
  cavepediav2-agent

Or use Docker Compose with the required services:

services:
  valkey:
    image: valkey/valkey:9

  postgres:
    image: postgres:16
    environment:
      POSTGRES_DB: langgraph
      POSTGRES_USER: langgraph
      POSTGRES_PASSWORD: langgraph

  agent:
    image: git.seaturtle.pw/cavepedia/cavepediav2-agent:latest
    ports:
      - "8123:8000"
    environment:
      REDIS_URI: redis://valkey:6379
      DATABASE_URI: postgres://langgraph:langgraph@postgres:5432/langgraph
      GOOGLE_API_KEY: ${GOOGLE_API_KEY}
    depends_on:
      - valkey
      - postgres

CI/CD

The agent image is automatically built and pushed to git.seaturtle.pw/cavepedia/cavepediav2-agent:latest on push to main via Gitea Actions.

Web Deployment

Environment Variables

Variable	Required	Default	Description
LANGGRAPH_DEPLOYMENT_URL	Yes	http://localhost:8123	URL to the LangGraph agent
AUTH0_SECRET	Yes	-	Session encryption key (openssl rand -hex 32)
AUTH0_DOMAIN	Yes	-	Auth0 tenant domain
AUTH0_CLIENT_ID	Yes	-	Auth0 application client ID
AUTH0_CLIENT_SECRET	Yes	-	Auth0 application client secret
APP_BASE_URL	Yes	-	Public URL of the app
LANGSMITH_API_KEY	No	-	LangSmith API key for tracing

Docker Compose (Full Stack)

services:
  web:
    image: git.seaturtle.pw/cavepedia/cavepediav2-web:latest
    ports:
      - "3000:3000"
    environment:
      LANGGRAPH_DEPLOYMENT_URL: http://agent:8000
      AUTH0_SECRET: ${AUTH0_SECRET}
      AUTH0_DOMAIN: ${AUTH0_DOMAIN}
      AUTH0_CLIENT_ID: ${AUTH0_CLIENT_ID}
      AUTH0_CLIENT_SECRET: ${AUTH0_CLIENT_SECRET}
      APP_BASE_URL: ${APP_BASE_URL}
    depends_on:
      - agent

  agent:
    image: git.seaturtle.pw/cavepedia/cavepediav2-agent:latest
    environment:
      REDIS_URI: redis://valkey:6379
      DATABASE_URI: postgres://langgraph:langgraph@postgres:5432/langgraph
      GOOGLE_API_KEY: ${GOOGLE_API_KEY}
    depends_on:
      - valkey
      - postgres

  valkey:
    image: valkey/valkey:9

  postgres:
    image: postgres:16
    environment:
      POSTGRES_DB: langgraph
      POSTGRES_USER: langgraph
      POSTGRES_PASSWORD: langgraph

Available Scripts

• dev - Start both UI and agent servers
• dev:ui - Start only Next.js
• dev:agent - Start only LangGraph agent
• build - Build Next.js for production
• start - Start production server
• lint - Run ESLint
• install:agent - Install agent Python dependencies

References

• LangGraph Documentation
• CopilotKit Documentation
• Next.js Documentation
• Auth0 Next.js SDK Examples