skill-creator

skill-creator is a skill for Claude Code, Codex from ratnesh-maurya/cursor-claude-personas. It costs 49 tokens per session (4,703 once invoked), scanned B, original, MIT.

A guided tool for creating custom CLI skills, which add reusable capabilities to a command-line AI assistant. It supports brainstorming, templates, validation, installation, and progress tracking.

In plain words
What is it for?
Use it to design a skill, generate its files, validate its contents, and install it locally or globally.
Why use it?
It organizes the work of defining and packaging a new skill instead of requiring manual setup. It also checks the result against stated standards before installation.

Skill for Claude CodeCodex

Written for Claude Code and Codex: installed under .claude/, but also reads ~/.codex or $CODEX_HOME. Also seen: reads .claude/ paths; mentions Claude Code; mentions Codex.

Good fit Use it to design a skill, generate its files, validate its contents, and install it locally or globally.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ratnesh-maurya/cursor-claude-personas/skill-creator
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.

Any agent
npx skills add ratnesh-maurya/cursor-claude-personas --skill skill-creator
Clone the repo
git clone --depth 1 https://github.com/ratnesh-maurya/cursor-claude-personas

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 skill-creator

README.md
[![agentmods](https://agentmods.dev/badge/skills/ratnesh-maurya/cursor-claude-personas/skill-creator/github.svg)](https://agentmods.dev/skills/ratnesh-maurya/cursor-claude-personas/skill-creator)
Your own site
<a href="https://agentmods.dev/skills/ratnesh-maurya/cursor-claude-personas/skill-creator"><img src="https://agentmods.dev/badge/skills/ratnesh-maurya/cursor-claude-personas/skill-creator/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for skill-creator

Your own site · 80×15
<a href="https://agentmods.dev/skills/ratnesh-maurya/cursor-claude-personas/skill-creator"><img src="https://agentmods.dev/badge/skills/ratnesh-maurya/cursor-claude-personas/skill-creator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,703 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00049 $0.04703
Opus 5 $0.00024 $0.02351
Sonnet 5 $0.00010 $0.00941
Haiku 4.5 $0.00005 $0.00470

Measured 9d ago against content hash db7a625bae07, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade B, and why

skill-creator scanned grade B with 1 finding 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 9d ago.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/init_skill.py, scripts/package_skill.py, scripts/quick_validate.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Enumerates other installed skillsmediumAgent snooping

Other skills' SKILL.md files reveal prompts, capabilities and secrets that should be invisible to peers.

ls -la ~/.claude/skills/$SKILL_NAME 2>/dev/null
.claude/skills/skill-creator/SKILL.md · 591 lines

How it starts

The opening of the file, as written. The whole thing — 591 lines — stays where its author put it; the contents beside it link to each section on GitHub.

skill-creator

Purpose

To create new CLI skills following Anthropic's official best practices with zero manual configuration. This skill automates brainstorming, template application, validation, and installation processes while maintaining progressive disclosure patterns and writing style standards.

When to Use This Skill

This skill should be used when:

  • User wants to extend CLI functionality with custom capabilities
  • User needs to create a skill following official standards
  • User wants to automate repetitive CLI tasks with a reusable skill
  • User needs to package domain knowledge into a skill format
  • User wants both local and global skill installation options

Core Capabilities

  1. Interactive Brainstorming - Collaborative session to define skill purpose and scope
  2. Prompt Enhancement - Optional integration with prompt-engineer skill for refinement
  3. Template Application - Automatic file generation from standardized templates
  4. Validation - YAML, content, and style checks against Anthropic standards
  5. Installation - Local repository or global installation with symlinks
  6. Progress Tracking - Visual gauge showing completion status at each step

Step 0: Discovery

Before starting skill creation, gather runtime information:

# Detect available platforms
COPILOT_INSTALLED=false
CLAUDE_INSTALLED=false
CODEX_INSTALLED=false

if command -v gh &>/dev/null && gh copilot --version &>/dev/null 2>&1; then
    COPILOT_INSTALLED=true
fi

if [[ -d "$HOME/.claude" ]]; then
    CLAUDE_INSTALLED=true
fi

if [[ -d "$HOME/.codex" ]]; then
    CODEX_INSTALLED=true
fi

# Determine working directory
REPO_ROOT=$(git rev-parse --show-toplevel 2>/dev/null || pwd)
SKILLS_REPO="$REPO_ROOT"

# Check if in cli-ai-skills repository
if [[ ! -d "$SKILLS_REPO/.github/skills" ]]; then
    echo "⚠️  Not in cli-ai-skills repository. Creating standalone skill."
    STANDALONE=true
fi

# Get user info from git config
AUTHOR=$(git config user.name || echo "Unknown")
EMAIL=$(git config user.email || echo "")

Read the full file on GitHub · 591 lines

Files

What ships with it

7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 9d ago First seen · 591 lines · 49 tokens per session scan B db7a625bae07

Subscribe to this mod's changes

skill-creator is a skill published in the GitHub repository ratnesh-maurya/cursor-claude-personas (8 stars, last pushed 5mo ago), licensed MIT. It adds 49 tokens to every session and 4,703 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 1 finding (enumerates other installed skills). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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