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cli

Design cross-language CLIs with argument parsing, subcommands, and prompts.

20|3|Updated Feb 2, 2026
Search Tags:#testing#cli#command-line#subcommands#interactive-prompts#argument-parsing
One-click install
npx skills add https://github.com/re-cinq/wave --skill cli-re-cinq
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: cli
Source: https://github.com/re-cinq/wave/tree/main/.claude/skills/cli
Command: npx skills add https://github.com/re-cinq/wave --skill cli-re-cinq

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

CLI development often lacks consistent patterns, leading to brittle tools and poor user experiences. This skill provides a catalog of best practices and practical examples to design robust, user-friendly CLIs across languages.

Core Features & Use Cases

  • Argument parsing and validation: robust handling of flags, options, positional args, environment variables, and config integration.
  • Subcommands and composition: clear command structures with nested commands, aliases, and comprehensive help output.
  • Interactive UX patterns: prompts, confirmations, progress indicators, and guided flows for complex workflows.
  • Testing and distribution: proven testing patterns and packaging strategies for cross-platform CLI tools.
  • Cross-language guidance: examples and library recommendations for Go, Python, Node.js, and Rust.

Quick Start

Create a simple CLI with a root command and one subcommand, then run it to verify argument parsing.

Frequently Asked Questions about cli

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I build a robust CLI with subcommands and interactive prompts?▼

Build a robust CLI by applying consolidated patterns for argument parsing, subcommands, and interactive prompts using recommended libraries like Cobra, Click, Commander, or Clap to ensure user-friendly command-line experiences.

What is the best way to parse arguments and validate flags in a command-line tool?▼

The best way to parse arguments is using established CLI libraries to robustly handle flags, options, positional args, and environment variables while integrating config files for comprehensive validation and user-friendly help output.

Does this CLI development guidance support Python, Node.js, Go, and Rust?▼

Yes, this CLI development guidance supports Python, Node.js, Go, and Rust by providing cross-language library recommendations and practical examples for real-world tooling, automation, and interactive setup wizards.

How do I test command-line interfaces with subcommands and interactive flows?▼

Test command-line interfaces using proven testing strategies tailored for CLI tools, applying patterns that validate subcommands, argument parsing, and interactive prompts to ensure reliable automation and tooling workflows.

Can I add interactive progress indicators and guided setup wizards to my CLI?▼

Yes, you can add interactive UX patterns like prompts, confirmations, and progress indicators to your CLI by leveraging dedicated library features for guided flows and complex interactive setup wizards.

What are common limitations when building interactive command-line tools across multiple languages?▼

Limitations arise from inconsistent CLI development patterns across languages, leading to brittle tools; mitigating this requires applying standardized best practices for argument parsing, subcommands, and interactive prompts.

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