cli-creation

cli-creation is a skill for Claude Code, Codex from shyamsridhar123/agentsmith-cli. It costs 42 tokens per session (3,385 once invoked), scanned A, original, MIT.

A guide for building command-line applications: programs controlled by typed terminal commands. It covers command arguments, help, subcommands, output, errors, configuration, and distribution.

In plain words
What is it for?
Use it when creating, extending, or reorganizing a command-line tool in languages such as TypeScript, Python, Go, or Rust.
Why use it?
It provides conventions for making terminal tools understandable, consistent, and reliable for both people and scripts.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/shyamsridhar123/agentsmith-cli/cli-creation
Any agent
npx skills add shyamsridhar123/agentsmith-cli --skill cli-creation
Clone the repo
git clone --depth 1 https://github.com/shyamsridhar123/agentsmith-cli

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for cli-creation

README.md
[![agentmods](https://agentmods.dev/badge/skills/shyamsridhar123/agentsmith-cli/cli-creation.svg)](https://agentmods.dev/skills/shyamsridhar123/agentsmith-cli/cli-creation)
Your own site
<a href="https://agentmods.dev/skills/shyamsridhar123/agentsmith-cli/cli-creation"><img src="https://agentmods.dev/badge/skills/shyamsridhar123/agentsmith-cli/cli-creation.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,385 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00042 $0.03385
Opus 5 $0.00021 $0.01692
Sonnet 5 $0.00008 $0.00677
Haiku 4.5 $0.00004 $0.00338

Measured 4d ago against content hash a7517841250a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

cli-creation scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.github/skills/cli-creation/SKILL.md · 526 lines

How it starts

The opening of the file, as written. The whole thing — 526 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLI Creation

Build professional, delightful command-line applications that follow established conventions and modern best practices.

When to Use This Skill

  • Creating new CLI tools or utilities
  • Adding command-line interfaces to existing applications
  • Refactoring CLI programs for better usability
  • User asks to "build a CLI", "create a command-line tool", or "add CLI commands"

Core Philosophy

Human-First Design

Design for humans first, machines second. The CLI is a text-based UI, not just a scripting interface.

Simple Parts That Work Together

Follow UNIX philosophy: small programs with clean interfaces that compose via pipes and standard I/O.

Consistency

Follow existing patterns. Terminal conventions are muscle memory—don't break expectations.

Ease of Discovery

Help users learn. Provide comprehensive help, examples, and suggestions.

Robustness

Handle errors gracefully. Be responsive. Show progress for long operations.


Project Structure

mycli/
├── src/
│   ├── main.{ts,py,go,rs}    # Entry point
│   ├── commands/              # Subcommands
│   │   ├── init.{ts,py,go,rs}
│   │   └── run.{ts,py,go,rs}
│   ├── utils/
│   │   ├── output.{ts,py,go,rs}  # Colors, formatting
│   │   └── config.{ts,py,go,rs}  # Configuration handling
│   └── types.{ts,py,go,rs}
├── tests/
├── README.md
└── package.json / pyproject.toml / go.mod / Cargo.toml

Language Library Notes
Node.js oclif, Commander oclif for complex CLIs, Commander for simple
Python Typer, Click Typer uses type hints, Click is battle-tested
Go Cobra, urfave/cli Cobra powers kubectl, Hugo, GitHub CLI
Rust clap Derive macros for type-safe parsing
Deno parseArgs Built-in standard library

Read the full file on GitHub · 526 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 526 lines · 42 tokens per session scan A a7517841250a

Subscribe to this mod's changes

cli-creation is a skill published in the GitHub repository shyamsridhar123/agentsmith-cli (16 stars, last pushed 5d ago), licensed MIT. It adds 42 tokens to every session and 3,385 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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