# Introduction 3.0.0+

# Core Concepts

There are two major parts of the system:

• @node-sitecore/config: A shared extensible configuration for all packages based on nconf and load .nscrc file,
• @node-sitecore/cli: Expose the nsc commands.

Both utilize a plugin-based architecture.

# ConfigService

ConfigService is the class responsible to load Config plugins packages.

Read our documentation about how to develop a Config plugins.

# CliService

ConfigService is the class responsible to load CLI plugins packages.

Read our documentation about how to develop a CLI plugins.