Implement Backend CLI While Preserving Existing APIs

Description

Add a Command Line Interface (CLI) to the backend application while ensuring that all existing REST APIs continue to function without any changes in behavior.

The CLI should provide an alternative way to interact with the backend through terminal commands and must reuse the existing service layer and business logic instead of duplicating code.

Objectives

• Preserve all existing API endpoints and functionality.
• Implement a production-ready CLI.
• Ensure APIs and CLI share the same business logic.
• Maintain backward compatibility.
• Improve developer and administrator experience.

Requirements

API Preservation

• Keep all existing APIs fully functional.
• Do not modify request/response formats.
• Preserve authentication, authorization, validations, and middleware.
• Verify all endpoints continue working after CLI integration.

CLI Features

• Help command (--help)
• Version command (--version)
• Interactive mode
• Command validation
• User-friendly error messages
• Confirmation prompts for destructive actions
• Proper exit codes
• Command aliases
• Detailed usage documentation

CLI Operations

Expose backend functionality through terminal commands, including:

Application Commands

• Start application
• Stop application (if applicable)
• Check status
• Health check

Resource Operations

• Create resources
• List resources
• View resource details
• Update resources
• Delete resources

Administrative Operations

• View logs
• Inspect configuration
• Execute maintenance tasks

Architecture

• Reuse existing services and business logic.
• Avoid code duplication.
• Follow existing project structure and coding standards.
• Keep API controllers and CLI commands separated.
• Ensure maintainability and extensibility.

Documentation

• Update README with CLI installation and usage instructions.
• Add command reference documentation.
• Include usage examples.

Acceptance Criteria

• All existing APIs work without regression.
• CLI successfully executes backend operations.
• No duplicate business logic is introduced.
• Documentation is updated.
• Tests pass successfully.
• Production-ready implementation.