Installation

System Requirements

Requirement	Minimum
Node.js	18.0.0+
React	18.0.0+
Package manager	npm, pnpm, or yarn
Anthropic API key	Required for knowledge extraction
Neo4j (optional)	5.x — for persistent knowledge graph

ConCRG is a monorepo with four packages. You only need to install what you use:

Package	Purpose	Required?
`@crg/connector-core`	Framework-agnostic core (MessageBus, Probe, Sessions)	Auto-installed
`@crg/connector-react`	React provider (`CRGProvider`)	Yes
`@crg/connector-react-v2`	Enhanced toolbar UI with FIND/LEARN/PRACTICE/REMEMBER cards	Recommended
`@crg/sidecar-ui`	Lightweight training sidecar (Preact)	Auto-installed

npm install @crg/connector-react @crg/connector-react-v2

The Train Service is a local Node.js backend (Hono) that handles:

Option A: npx (recommended for getting started)

ANTHROPIC_API_KEY=sk-ant-... npx @crg/train-service

Option B: Install globally

npm install -g @crg/train-service
ANTHROPIC_API_KEY=sk-ant-... crg-train-service

Option C: Add to your project

npm install --save-dev @crg/train-service

Add to package.json:

{
  "scripts": {
    "crg": "crg-train-service"
  }
}

The service runs on port 3001 by default. Override with PORT=3002.

The Graph Service provides persistent Neo4j storage and Graph RAG querying. It is optional but recommended for production deployments.

Requirements:

pip install crg-graph-service
ANTHROPIC_API_KEY=sk-ant-... NEO4J_URI=bolt://localhost:7687 crg-graph-service

Runs on port 3002 by default.