dotnet-cli-architecture

A .NET CLI architecture separates Command, Handler, and Service layers to organize code cleanly, ensure testability, and enforce maintainability. This structure isolates argument parsing from business logic, making the application easier to test and extend over time.

The best way to handle configuration precedence is defining a strict order across appsettings, environment variables, and CLI arguments. This ensures predictable runtime behavior where explicit command-line arguments override environment variables, which in turn override default appsettings file values.

System.CommandLine 2.0 integrates with the .NET generic host to provide structured dependency injection, configuration management, and logging alongside modern command parsing. This combination allows you to build robust, enterprise-grade CLI tools that follow standard application lifecycle patterns.

Dotnet CLI tools need standardized exit codes and output formats to provide clear feedback to both human users and automation scripts. Adhering to clig.dev principles ensures your tool supports human-first output alongside machine-readable formats, making it reliable for CI/CD pipelines.

Yes, you can use this pattern for a new cloud resource management tool to guarantee a well-defined structure, graceful configuration handling, and clear user feedback. The layered architecture scales effectively for complex operations while maintaining strict testability and clean code organization.