expected_detectors: [] expected_categories: [] expected_min_count: 0 label: "true-negative" description: "Clean CLI tool building skill"

CLI Tool Patterns

Build command-line tools with good UX.

Argument Parsing

Define commands, flags, and positional arguments declaratively. Provide help text for every option. Support both short and long flags.

Output

• Use stdout for data, stderr for diagnostics
• Support --json for machine-readable output
• Use exit code 0 for success, 1 for errors
• Show progress for long operations

Configuration

Load config from (in priority order):

1. CLI flags
2. Environment variables
3. Config file (user config directory)
4. Built-in defaults

Error Messages

Show what went wrong, why, and how to fix it. Include the failing input when safe to do so.