# RD-Agent Tutorial - Chapter 2: Core Functions

RD-Agent Tutorial - Chapter 2: Core Functions 2.1 Command Line Interface Basics CLI Structure and Design Principles RD-Agent adopts a unified command line interface (CLI) design, with all functions accessed through the rdagent command. The CLI core implementation is located at rdagent/app/cli.py , built using the Typer framework, providing an intuitive and powerful command line experience. Architecture Analysis # rdagent/app/cli.py core structure import typer from rdagent.app.data_science.loop import main as data_science from rdagent.app.qlib_rd_loop.factor import main as fin_factor from rdagent.app.qlib_rd_loop.model import main as fin_model from rdagent.app.qlib_rd_loop.quant import main as fin_quant app = typer . Typer () # Register commands app . command ( name = " fin_factor " )( fin_factor ) app . command ( name = " fin_model " )( fin_model ) app . command ( name = " data_science " )( data_science ) Command Classification and Organization RD-Agent commands are organized by functi