What problem does it solve?
This Skill provides comprehensive guidance and best practices for designing, building, and testing effective command-line interface (CLI) applications across various programming languages.
Core Features & Use Cases
- Design Principles: Adheres to Unix philosophy, command structure, and subcommand/flag usage.
- Argument Parsing: Handles required/optional arguments, flags, environment variables, and configuration files with clear precedence.
- User Interface: Focuses on clear help text, version info, progress indicators, color output, and interactive prompts.
- Output & Error Handling: Defines standards for human-readable vs. machine-readable output, proper exit codes, and informative error messages with debugging options.
- Cross-Platform Compatibility: Addresses path separators, line endings, and terminal capabilities.
- Testing Strategies: Outlines integration tests, output verification, and exit code checks.
- Documentation: Emphasizes READMEs, man pages, and built-in help.
- Libraries: Introduces common libraries for Python, Node.js, Go, and Rust.
- Use Case: A developer needs to build a new CLI tool for managing cloud resources. They can consult this Skill for best practices on argument parsing, user feedback, and error handling to ensure the tool is user-friendly and robust.
Quick Start
Use the cli-development skill to learn how to implement clear help text for a new command-line tool.
