Reviewing CLI Command

Reviewing CLI Commands

Checklist for reviewing Typer CLI command implementations.

Review Process

• Read the command file
• Check each section below
• Report findings using output format at bottom

Structure

• [ ] File in src/<cli_app>/commands/
• [ ] Has app = typer.Typer() and @app.command()
• [ ] Command groups use @app.command() for each subcommand
• [ ] Registered in commands/__init__.py with add_typer()
• [ ] Single commands: add_typer(app) without name
• [ ] Command groups: add_typer(app, name="group")

Arguments & Options

• [ ] Uses Annotated syntax
• [ ] Arguments for required positional input
• [ ] Options for optional named parameters
• [ ] Short flags where appropriate (-f, -q)
• [ ] Help text: lowercase, no period, brief

# GOOD:
name: Annotated[str, typer.Argument(help="item name")]
force: Annotated[bool, typer.Option("--force", "-f", help="skip confirmation")] = False

# BAD:
name: str = typer.Argument(..., help="The name of the item.")

Error Handling

• [ ] Validates input before processing
• [ ] Exit codes: 0=success, 1=error, 2=invalid input
• [ ] Errors via display.error()
• [ ] Uses raise typer.Exit(code) after errors
• [ ] Uses raise typer.Abort() for cancellation

# GOOD:
if id < 1:
    display.error("ID must be positive")
    raise typer.Exit(EXIT_INVALID_INPUT)

# BAD:
if id < 1:
    print("Error: ID must be positive")
    return

Output

• [ ] All output through display module
• [ ] No print(), typer.echo(), or console.print()

# GOOD:
display.success(f"Added '{task.title}'")

# BAD:
print(f"Added '{task.title}'")

Destructive Actions

• [ ] Has --force / -f flag
• [ ] typer.confirm() with default=False
• [ ] Shows "Cancelled" on abort

# GOOD:
if not force:
    confirm = typer.confirm(f"Delete '{task.title}'?", default=False)
    if not confirm:
        display.info("Cancelled")
        raise typer.Abort()

# BAD: defaults to Yes
confirm = typer.confirm(f"Delete?", default=True)

Help Text

• [ ] Docstring exists
• [ ] Imperative mood ("Add a task" not "Adds a task")
• [ ] First line < 60 characters

Common Mistakes

| Mistake | Fix |

|---------|-----|

| print() | display.success/error/warning/info() |

| Wrong exit code | 0=success, 1=error, 2=invalid |

| Missing --force on delete | Add force option with default False |

| Confirmation defaults Yes | default=False in typer.confirm() |

| Old Typer syntax | Annotated[type, typer.Argument()] |

| Missing app = typer.Typer() | Each command file needs its own app |

| Not registered | add_typer(app) in commands/__init__.py |

Review Output Format

## Review: <command_name>

[OK] Uses Annotated syntax
[OK] Has docstring in imperative mood
[X] Missing --force flag on destructive command
[X] Uses print() instead of display module
[!] Help text could be shorter

### Summary
<brief summary of issues found>

### Suggested Fixes
<code suggestions if needed>