Master CLI Design with AI: Build and Enhance Command Interfaces

Master CLI Design with AI: Build and Enhance Command Interfaces

This AI agent skill provides developers with a toolset to design, build, or review command-line interfaces (CLIs) based on the Command Line Interface Guidelines from clig.dev. It supports tasks such as creating new CLIs, adding commands, designing help text, and improving error messages for a more humane and usable interface.

What this skill does

• Guides the creation of command shapes, including names, subcommands, and flags.
• Assists in writing helpful text and error messages to enhance communication with users.
• Supports defining input/output contracts, choosing appropriate stdout/stderr behavior, and machine-readable output modes.
• Ensures safer design choices for destructive operations with options like dry-runs and idempotence checks.
• Evaluates CLIs for scriptability, discoverability, and Unix-friendliness while grounding decisions in established guidelines.

Who it is for

• Software developers and engineers designing command-line tools.
• DevOps teams integrating CLIs into automation systems and CI/CD pipelines.
• Technical writers responsible for documenting command-line interfaces.
• Development teams using AI coding agents such as Claude Code, Cursor, and Codex for CLI development.

Use cases

• Designing a new CLI for a software tool with a focus on usability and predictability.
• Reviewing and enhancing existing CLI tools to align with best practices in interface design.
• Integrating CLIs into scripted environments where composability and reliable outputs are vital.
• Optimizing command-line tools for cross-platform compatibility and user error management.

Technical details

• Analyzes and applies the Command Line Interface Guidelines from clig.dev.
• Utilizes AI capabilities through integration with AI coding agents such as Claude Code, Cursor, and Codex.
• Focuses on operational models involving command shape, conversation, I/O contract, and safety considerations.

Source & Licence

This package is built on open-source work published by markphelps (markphelps/agent-plugins) and distributed under MIT. The original licence text and copyright notice are included in your download.

Personal and commercial use, modification and redistribution are permitted, provided the original copyright and licence notice are retained.

Your purchase covers curation, licence verification, packaging, documentation and instant delivery. It does not grant exclusive rights to the underlying open-source code, which remains available under its original licence.

Delivery & Support

• Delivery: instant — a secure download link is emailed to you as soon as payment is confirmed.
• Format: ZIP archive containing the skill files, documentation and the original licence.
• Support: support@mcpcart.com — we aim to reply within 2 business days.
• Updates: updates are included only where stated on this page.

Refunds

This is a digital product delivered immediately after purchase. By completing your order you request immediate delivery and acknowledge that, once the download has been accessed, the statutory right to cancel no longer applies to the extent permitted by law. Refund requests are handled in accordance with our published Refund Policy.

Claude, Codex, Gemini and Cursor are trademarks of their respective owners. MCP Cart is an independent marketplace and is not affiliated with, endorsed by, or sponsored by any of them. Compatibility references describe interoperability only.