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justcyl
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cli-creator

Plan CLI command trees, flags, and I/O contracts before implementation.

Updated Feb 23, 2026
Search Tags:#design#cli#spec#flags#interface#subcommands
One-click install
npx skills add https://github.com/justcyl/my-skills --skill cli-creator-justcyl
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: cli-creator
Source: https://github.com/justcyl/my-skills/tree/main/.skills/archived-skills/cli-creator
Command: npx skills add https://github.com/justcyl/my-skills --skill cli-creator-justcyl

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Designing and documenting a CLI surface area before implementation is error-prone without a clear contract; this skill provides a structured specification to lock in the command tree, flags, exit codes, and input/output expectations.

Core Features & Use Cases

  • Compact, implementable CLI spec template that captures commands, flags, and usage
  • Clear mapping of subcommands, arguments, and state-changing behavior
  • Use Case: you are planning a new CLI for a data-processing tool and need a deterministic plan before coding

Quick Start

Write a concise CLI spec that defines the command tree, flags, and I/O contracts for a new tool.

Frequently Asked Questions about cli-creator

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

FAQPage Schema
How do I design a CLI interface before coding the implementation?▼

To design a CLI interface, you should plan the command tree, flags, and I/O contracts upfront. This approach locks in the usage semantics and exit codes, providing a deterministic plan before writing code.

What is the best way to spec out command-line tool subcommands and flags?▼

The best way to spec subcommands and flags is using a structured specification template that maps the command tree and state-changing behavior. This creates a clear data contract for your tool's usage.

How do I define exit codes and I/O contracts for a new command-line tool?▼

Define exit codes and I/O contracts by documenting them in a CLI specification before implementation. This captures input/output expectations and safety rules across platforms to prevent errors.

Can I use a CLI spec template for data-processing tools across different platforms?▼

Yes, a CLI spec template works for data-processing tools across different platforms. It establishes platform-specific safety rules and usage trees to ensure consistent command-line behavior.

Why do I need to plan the CLI usage tree before building my tool?▼

Planning the CLI usage tree is needed to avoid error-prone implementation phases. A structured specification locks in commands and arguments, providing a clear contract that guides development.

What should a command-line interface specification include for state-changing operations?▼

A command-line interface specification should include a clear mapping of subcommands, arguments, and state-changing behavior. It defines the operational instructions and data contracts needed for safe execution.

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