Library / Marketing

Blog Post Humanizer Claude skill

Rewrites stiff AI drafts into plain, specific, human copy without changing the facts.

Who it's for: Marketers and writers cleaning up AI first drafts.
Last tested: 2026-10-22. License: MIT.

SKILL.md

---
name: blog-post-humanizer
description: Rewrite text so it reads like a skilled human wrote it. Use when the user asks to humanize, de-AI, edit for tone, or make a draft sound less robotic.
---

# Blog Post Humanizer

## Steps
1. Read the full draft. Note the core claims and facts. These must survive unchanged.
2. Cut filler openers ("In today's fast-paced world", "It's important to note"). Start with the point.
3. Replace vague words with specifics: numbers, names, examples from the draft.
4. Vary sentence length. Mix short punches with longer explanations.
5. Remove these patterns: em dashes, "delve", "leverage", "unlock", "seamless", "robust", "game-changer", triple adjective lists, rhetorical questions as transitions.
6. Use contractions and active voice. Address the reader as "you".
7. Keep headings and structure unless they are broken.

## Output
The rewritten text only, then a 3-bullet list of the biggest changes.

## Rules
- Never invent facts, stats, or quotes.
- Keep the author's opinions and keep the length within 15 percent of the original.

How to install

Claude.ai (web and desktop)

1. Make a folder named blog-post-humanizer and save the file above inside it as SKILL.md.
2. Zip the folder.
3. Go to Settings, then Capabilities (or Customize, Skills, depending on your app version), and upload the zip. Code execution must be on.

Claude Code

mkdir -p ~/.claude/skills/blog-post-humanizer
# paste the SKILL.md into:
~/.claude/skills/blog-post-humanizer/SKILL.md
# or per project: .claude/skills/blog-post-humanizer/SKILL.md

Claude API

Upload the folder to the Skills API, then pass the returned skill ID in the container of a Messages request with the code execution tool on.

curl -X POST https://api.anthropic.com/v1/skills \
  -H "x-api-key: $ANTHROPIC_API_KEY" -H "anthropic-version: 2023-06-01" \
  -F "files[]=@blog-post-humanizer/SKILL.md;filename=blog-post-humanizer/SKILL.md"

# then in /v1/messages:
"container": { "skills": [{ "type": "custom", "skill_id": "skill_...", "version": "latest" }] },
"tools": [{ "type": "code_execution_20250825", "name": "code_execution" }]

Checked against Anthropic's Skills API guide on 2026-10-22: platform.claude.com/docs/en/build-with-claude/skills-guide

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