# cli-interface Spec Delta

## ADDED Requirements

### Requirement: CLI Help Display
The system SHALL display comprehensive help information when invoked without arguments or with `--help` flag.

#### Scenario: Display Rich-Formatted Help
- **WHEN** user runs `normattiva2md --help`
- **THEN** system SHALL display help formatted with Rich library
- **AND** output SHALL use colors, panels, tables for better readability
- **AND** help SHALL be organized into clear sections (Usage, Options, Examples)
- **AND** code examples SHALL use syntax highlighting

#### Scenario: Display Help on No Arguments
- **WHEN** user runs `normattiva2md` without arguments
- **THEN** system SHALL display Rich-formatted help
- **AND** exit with status code 1

#### Scenario: Terminal Without Color Support
- **WHEN** terminal does not support colors
- **THEN** system SHALL degrade gracefully to plain text
- **AND** help SHALL remain readable and structured
- **AND** no ANSI escape codes SHALL appear

#### Scenario: Help Content Preservation
- **WHEN** Rich formatting is applied
- **THEN** all existing help content SHALL be preserved
- **AND** all CLI options SHALL be documented
- **AND** all usage examples SHALL be included
- **AND** no information SHALL be lost in conversion

#### Scenario: Backward Compatibility
- **WHEN** user invokes any CLI command
- **THEN** command behavior SHALL remain unchanged
- **AND** only help display formatting changes
- **AND** all existing tests SHALL pass
