command-development

command-development is a skill for Claude Code, Codex from hamzaPixl/pixl-ai. It costs 29 tokens per session (1,513 once invoked), scanned A, original, MIT.

A guide and toolkit for creating reusable slash commands for Claude Code, using prompts with options such as arguments, file references, and interactive steps.

In plain words
What is it for?
Use it when defining or editing project or plugin commands, including their Markdown structure and behavior.
Why use it?
It helps turn repeated instructions into correctly structured commands that the coding agent can execute consistently.

Skill for Claude CodeCodex

Installs and runs on its own, but its text points at files inside its plugin — anything it tells you to read at a ${CLAUDE_PLUGIN_ROOT} path is only there once the plugin is installed. Installing the plugin gets both.

Part of the pixl-crew plugin — 93 skills, 14 agents, 6 hooks shipped together

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/hamzapixl/pixl-ai/command-development
Any agent
npx skills add hamzaPixl/pixl-ai --skill command-development
Clone the repo
git clone --depth 1 https://github.com/hamzaPixl/pixl-ai

Made for: Claude Code, Codex.

Or install pixl-crew, the plugin that ships this one along with the rest of its 93 skills, 14 agents, 6 hooks.

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 command-development

README.md
[![agentmods](https://agentmods.dev/badge/skills/hamzapixl/pixl-ai/command-development.svg)](https://agentmods.dev/skills/hamzapixl/pixl-ai/command-development)
Your own site
<a href="https://agentmods.dev/skills/hamzapixl/pixl-ai/command-development"><img src="https://agentmods.dev/badge/skills/hamzapixl/pixl-ai/command-development.svg" alt="Measured on agentmods" height="20"></a>
Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,513 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 $0.00029 $0.01513
Opus 5 $0.00015 $0.00757
Sonnet 5 $0.00006 $0.00303
Haiku 4.5 $0.00003 $0.00151

Measured 4d ago against content hash 2c39d103500f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

command-development 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.

packages/crew/skills/command-development/SKILL.md · 237 lines

How it starts

The opening of the file, as written. The whole thing — 237 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Command Development for Claude Code

Overview

Slash commands are frequently-used prompts defined as Markdown files that Claude executes during interactive sessions. Understanding command structure, frontmatter options, and dynamic features enables creating powerful, reusable workflows.

Command Basics

Critical: Commands are Instructions FOR Claude

Commands are written for agent consumption, not human consumption.

When a user invokes /command-name, the command content becomes Claude's instructions. Write commands as directives TO Claude about what to do, not as messages TO the user.

Correct approach (instructions for Claude):

Review this code for security vulnerabilities including:

- SQL injection
- XSS attacks
- Authentication issues

Provide specific line numbers and severity ratings.

Incorrect approach (messages to user):

This command will review your code for security issues.
You'll receive a report with vulnerability details.

The first example tells Claude what to do. The second tells the user what will happen but doesn't instruct Claude. Always use the first approach.

Command Locations

  • Project commands (.claude/commands/): Shared with team, shown as "(project)" in /help
  • Personal commands (~/.claude/commands/): Available in all projects, shown as "(user)" in /help
  • Plugin commands (plugin-name/commands/): Available when plugin installed, shown as "(plugin-name)" in /help

File Format

Commands are Markdown files with .md extension. No frontmatter needed for basic commands:

Review this code for security vulnerabilities including:

- SQL injection
- XSS attacks
- Authentication bypass

With YAML frontmatter for configuration:

---
description: Review code for security issues
allowed-tools: Read, Grep, Bash(git:*)
model: sonnet
---

Review this code for security vulnerabilities...

YAML Frontmatter Fields

description

Read the full file on GitHub · 237 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 · 237 lines · 29 tokens per session scan A 2c39d103500f

Subscribe to this mod's changes

command-development is a skill published in the GitHub repository hamzaPixl/pixl-ai (2 stars, last pushed 4mo ago), licensed MIT. It adds 29 tokens to every session and 1,513 once invoked, about $0.0001 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 2026-08-31.

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