skill-creator

A scaffolding tool for creating a custom Claude Code skill: a reusable instruction package with a required SKILL.md file and optional scripts, references, and assets.

In plain words
What is it for?
Use it to start a new skill, standardize skill layouts, or prepare a skill with templates and supporting resources for distribution.
Why use it?
It removes the need to remember the expected folder structure and file format when packaging a skill for a project or team.

Skill for Claude CodeCodex

Part of the ai-methodology plugin — 17 skills, 4 commands, 2 agents, 1 hook 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/florianbruniaux/claude-code-plugins/skill-creator
Any agent
npx skills add FlorianBruniaux/claude-code-plugins --skill skill-creator
Clone the repo
git clone --depth 1 https://github.com/FlorianBruniaux/claude-code-plugins

Made for: Claude Code, Codex.

Or install ai-methodology, the plugin that ships this one along with the rest of its 17 skills, 4 commands, 2 agents, 1 hook.

Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 873 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 $0.00045 $0.00873
Opus 5 $0.00023 $0.00436
Sonnet 5 $0.00009 $0.00175
Haiku 4.5 $0.00005 $0.00087

Measured 3d ago against content hash 0f66ac6982ee, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

skill-creator 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 3d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/init_skill.py, scripts/package_skill.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.

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.

plugins/ai-methodology/skills/skill-creator/SKILL.md · 121 lines

How it starts

The opening of the file, as written. The whole thing — 121 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Creator

Generate new Claude Code skills with correct directory structure, YAML frontmatter, and optional bundled resources.

When to Use

  • Creating a new custom skill for a project
  • Standardizing skill structure across a team
  • Generating skill templates with scripts, references, and assets
  • Packaging skills for distribution

Skill Directory Structure

skill-name/
├── SKILL.md          # Required: Main skill file with YAML frontmatter
├── scripts/          # Optional: Executable code for deterministic tasks
├── references/       # Optional: Documentation loaded contextually
└── assets/           # Optional: Templates, images, boilerplate (not loaded into context)

Workflow

1. Create the Skill

Create a new skill called "my-skill-name" in ~/.claude/skills/

Or with a specific purpose:

Create a skill for generating release notes from git commits,
with templates for CHANGELOG.md and Slack announcements

Or via the initialization script:

python3 ~/.claude/skills/skill-creator/scripts/init_skill.py <skill-name> --path <output-directory>

2. Generated SKILL.md Template

The created SKILL.md follows this structure:

---
name: skill-name
description: "What the skill does. Use when [trigger conditions]."
---

# Skill Name

## When to Use
- Trigger condition 1
- Trigger condition 2

## What This Skill Does
1. **Step 1**: Description
2. **Step 2**: Description

## How to Use
[Usage examples]

## Example
**User**: "Example prompt"
**Output**: [Example output]

3. Validate the Skill

After creation, verify:

  1. Frontmatter: name is kebab-case, 1-64 chars; description is a quoted string with "Use when" clause
  2. Content: Has "When to Use" section with trigger conditions and at least one usage example
  3. Structure: SKILL.md is under 5000 words; references and assets are in correct subdirectories
  4. Test: Invoke the skill with a real use case and confirm expected output

4. Package for Distribution (Optional)

Read the full file on GitHub · 121 lines

Files

What ships with it

2 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. 3d ago First seen · 121 lines · 45 tokens per session scan A 0f66ac6982ee

Subscribe to this mod's changes

skill-creator is a skill published in the GitHub repository FlorianBruniaux/claude-code-plugins (40 stars, last pushed 3mo ago), licensed MIT. It adds 45 tokens to every session and 873 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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