CLI Development (Typer + Rich)

Consult python3-core for standing defaults. Load python3-testing for test patterns.

Standards

• Annotated[Type, typer.Option(...)] syntax for all CLI params
• rich_help_panel to group options
• Rich emoji tokens (:white_check_mark:) not Unicode literals
• Architecture: CLI (Typer) → Business Logic → Services → Display (Rich)
• uv run <script> over python3 <script>
• Factory pattern for dependency injection

App Structure

import typer
from rich.console import Console