AI drafts often sound the same: puffed-up openers, "it's not just X, it's Y", groups of three, and a tidy summary at the end. Wikipedia editors keep a public list of these tells. This guide shows you how to turn that list into a Claude skill so every draft gets cleaned up in your own voice, without explaining the rules each time.
What you need
A Claude account. Anthropic says Skills work on Free, Pro, Max, Team and Enterprise plans, but they need "Code execution and file creation" turned on in Settings > Capabilities (Use Skills in Claude).
The source list: Wikipedia's Signs of AI writing guide.
Optional shortcut: the free, open-source humanizer skill by blader (MIT license), which is already built on that Wikipedia guide.
Two or three samples of your own writing, such as old captions, emails or blog posts. This is what makes the result sound like you.
Step by step
Option A: build your own skill (about 10 minutes)
In Claude, go to Settings > Capabilities and switch on "Code execution and file creation".
Start a new chat and paste this:
Read Wikipedia's guide "Wikipedia:Signs of AI writing" (https://en.wikipedia.org/wiki/Wikipedia:Signs_of_AI_writing). List every pattern it describes that makes text look AI-written, grouped by type: word choice, sentence structure, formatting, tone, and leftover chatbot phrases. For each pattern, give one short example and one better alternative.In the same chat, give Claude your voice:
Here are samples of my own writing. Describe my voice in 8 to 10 rules: sentence length, how I open and close, words I use often, words I never use, how formal I am, and how I use humour.
[PASTE 2 OR 3 SAMPLES HERE]Now ask Claude to package it as a skill. Anthropic's tutorial says Claude uses a built-in skill-creator to write the SKILL.md file and package it for you (How to create a skill with Claude).
Create a skill called "humanizer" from everything in this chat. When I give it a draft, it should:
1. Find every AI-writing pattern from the Wikipedia list and fix it.
2. Rewrite in my voice using the rules you wrote.
3. Keep the meaning and facts exactly the same. Never add facts, numbers or quotes that are not in my draft. If something is missing, ask me.
4. Return the rewritten text first, then a short list of what it changed.
Package it so I can save and install it.Save the skill file Claude creates. Then go to Customize > Skills, click "+", choose Create skill, then Upload a skill, and upload the ZIP. Make sure it's switched on (Use Skills in Claude).
Use it. In a new chat, write:
Use my humanizer skill on this draft:
[PASTE YOUR DRAFT]Claude also loads skills on its own when a request matches the skill's description, so "humanize this" usually works too.
Option B: install the ready-made humanizer
Claude.ai or Claude Desktop: download the blader/humanizer repo as a ZIP from GitHub and upload it under your skills, as in step 5.
Claude Code: run these two commands (the README says this needs Claude Code 2.1.142 or newer):
/plugin marketplace add blader/humanizer
/plugin install humanizer@humanizerThen type /humanizer followed by your text. The README says you can add a sample of your own writing so the rewrite follows your rhythm and word choice.
Good to know
It will not guarantee "0% AI" on detectors. The humanizer's own README says passing detectors is not its goal and that detectors still flag most of its output. AI detectors are inconsistent, and no setup scores 0% every time.
The Wikipedia list is a field guide, not a rulebook. The page, run by WikiProject AI Cleanup, says these patterns are only possible signs, and plenty of human writing has them too.
The goal is better writing for people. Use it to make your drafts clearer and more like you, not to hide AI use where it isn't allowed.
Follow the rules where you submit. Colleges, exams, clients and publications may require you to disclose AI help. A humanizer doesn't change that, and passing AI work off as your own where it's banned can get you in trouble.
You are still the editor. Read every rewrite. A skill can change meaning, and it doesn't fact-check.
Your samples matter most. The more of your real writing you give it, the less generic the result.
Sources
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