# Skill Creator

Create, refine, and benchmark agent skills.

- Repository: https://github.com/feiskyer/claude-code-settings (1668 stars)
- Category: AI and agents
- License: MIT
- Last updated: 2026-09-27
- Runs scripts: yes, review before use

## Install

Claude Code: `npx skills add feiskyer/claude-code-settings --skill skill-creator -g -a claude-code -y`
Codex: `npx skills add feiskyer/claude-code-settings --skill skill-creator -g -a codex -y`
Cursor: `npx skills add feiskyer/claude-code-settings --skill skill-creator -g -a cursor -y`
Gemini CLI: `npx skills add feiskyer/claude-code-settings --skill skill-creator -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add feiskyer/claude-code-settings`

## Description

Create, refine, and benchmark agent skills. Use when building a new skill, updating an existing one, running evals, checking trigger quality, or improving a skill description.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# Skill Creator

A skill for creating new skills and iteratively improving them.

At a high level, the process of creating a skill goes like this:

- Decide what you want the skill to do and roughly how it should do it
- Write a draft of the skill
- Create a few test prompts and run the agent with the skill loaded on them
- Help the user evaluate the results both qualitatively and quantitatively
  - While the runs happen in the background, draft some quantitative evals if there aren't any (if there are some, you can either use as is or modify if you feel something needs to change about them). Then explain them to the user (or if they already existed, explain the ones that already exist)
  - Use the `eval-viewer/generate_review.py` script to show the user the results for them to look at, and also let them look at the quantitative metrics
- Rewrite the skill based on feedback from the user's evaluation of the results (and also if there are any glaring flaws that become apparent from the quantitative benchmarks)
- Repeat until you're satisfied
- Expand the test set and try again at larger scale

Your job when using this skill is to figure out where the user is in this process and then jump in and help them progress through these stages. So for instance, maybe they're like "I want to make a skill for X". You can help narrow down what they mean, write a draft, write the test cases, figure out how they want to evaluate, run all the prompts, and repeat.

On the other hand, maybe they already have a draft of the skill. In this case you can go straight to the eval/iterate part of the loop.

Of course, you should always be flexible and if the user is like "I don't need to run a bunch of evaluations, just vibe with me", you can do that instead.

Then after the skill is done (but again, the order is flexible), you can also run the skill description improver, which we have a whole separate script for, to optimize the triggering of the skill.

Cool? Cool.

The rest: https://github.com/feiskyer/claude-code-settings/blob/HEAD/skills/skill-creator/SKILL.md