AI Blocks › Make your own skills
Skill writer
Describe the job. Get a new skill with test prompts and a description that makes it trigger well.
Skill writer is a free AI skill for the job "Make your own skills". Give the instructions to an AI assistant that supports the required files and tools, then review its output.
Free · No account · Apache 2.0 licence · Made by Anthropic
Made by Anthropic. See the original on GitHub; we copied it as it is, with its licence.
What it does
A new skill that works the first time you use it, built from a plain description of the job. You say what you want, and the skill narrows it down, drafts the instructions, and writes a few realistic test prompts. Then it runs those prompts with the new skill switched on, shows you the results side by side, and tracks simple numbers like pass rates. You tell it what is wrong, it rewrites, and the loop repeats on a bigger test set. A last step rewrites the short description so the skill triggers when it should. If you already have a draft, you can skip straight to testing. Running the viewer needs Python.
You give it
- A plain description of the job
- An existing skill draft (optional)
- Examples of good and bad results (optional)
- Your feedback on each test run
You get
- A drafted skill with clear instructions
- A set of test prompts
- Side by side results with pass rates
- A sharper trigger description
Use it when
- You do the same task every week and want to turn it into a reusable skill.
- You have a skill draft that gives uneven results.
- You want proof a change made your skill better, not just different.
- Your skill does not trigger when you expect it to.
How to use it
- Add it to your AI once: download it and add the folder to Claude, ChatGPT or Codex as a skill.
- Ask for the job in your own words. Your AI opens the skill when it fits.
- It works best when your AI can run code.