Okorodavid/copywriter-skill

Write or rewrite selling copy, then humanize it so it reads like a person wrote it. The skill works for Claude Code, claude.ai and ChatGPT.
It runs two passes:
1. Copy pass. It follows the selling order (problem, cost, promise, proof, one next step) and runs Harry Dry's three tests on every line. It only uses persuasion levers backed by real facts. Any number you haven't given stays in [brackets], so it never makes one up.
2. Humanizer pass. It strips em dashes, AI words, "not X but Y" lines, stated morals and padding, and keeps your facts, hook and ask.
You get the best version first, a few alternatives with one line each on why they work, and the [brackets] you need to fill in.
Works for hooks, headlines, subject lines, cold emails, DMs, follow-ups, sales pages, landing pages, social posts, video scripts, flyers, ads, sales scripts and offers.
## Install
### Claude Code
/plugin marketplace add Okorodavid/copywriter-skill
/plugin install copywriter@okorodavid
Restart Claude Code. Then ask for copy ("rewrite this cold email: ...") or type /copywriter.
Without the plugin system, copy the skill folder into your skills folder:
bash
git clone https://github.com/Okorodavid/copywriter-skill
cp -r copywriter-skill/plugins/copywriter/skills/copywriter ~/.claude/skills/
On Windows (PowerShell):
powershell
git clone https://github.com/Okorodavid/copywriter-skill
Copy-Item -Recurse copywriter-skill\plugins\copywriter\skills\copywriter $HOME\.claude\skills\
### claude.ai (web, desktop and mobile apps)
1. Download copywriter-claude-skill.zip.
2. In Claude, go to Settings > Capabilities. Turn on Code execution and file creation if it's off.
3. Under Skills, click Upload skill and pick the zip. Don't unzip it.
4. Ask for copy in any chat. Claude loads the skill when the request fits.
### ChatGPT
Download copywriter-chatgpt.zip and follow chatgpt/SETUP.md. You can set it up as a Custom GPT (paste the instructions, upload the 11 knowledge files) or as a ChatGPT Project.
### Other agents
The skill is a plain SKILL.md folder. Agents that read skills (Codex CLI, for example) can load it from their skills folder. For Codex that's ~/.codex/skills/copywriter.
## Try it
Rewrite this cold email so it gets a reply:
Write 5 hooks for a TikTok about my meal-prep service for nurses on night shifts
Write a sales page for a $29 Notion budget template. I have 41 sales and 6 reviews.
Make this LinkedIn post sound less like AI:
## What's inside
plugins/copywriter/skills/copywriter/
SKILL.md the two-pass method
references/
playbook.md read first: three tests, selling order, 7 levers, formats, 10-point check
headlines.md headline types, the 4 U's
clear-writing-and-selling.md clarity, benefits, the motivating sequence, USP, research
print-flyers-and-letters.md ads, sales letters, flyers, brochures