What is Humanizer?
Humanizer is an agent skill that makes AI-written text sound like a person wrote it, without changing what it says. It is built on Wikipedia's Signs of AI writing guide, and it works in Claude Code, Codex, and any other agent that supports skills.
The skill checks text for 26 patterns of AI writing and rewrites the most common ones on sight. You call it with /humanizer, or ask in plain language, and you can give it a file path to rewrite a file. If you include a sample of your own writing, it follows that sample's rhythm, word choice, punctuation and deliberate quirks.
Humanizer edits for human readers. Getting past AI detectors is not a goal, and detectors still flag most of its output.
Installation depends on the agent: Claude Code uses the plugin marketplace, Codex and other agents use the Skills CLI (for example npx skills add blader/humanizer --global --agent codex), and Claude.ai and Claude Desktop take the repository as a ZIP uploaded as a skill in Settings.
Key capabilities
- A skill invoked with /humanizer or plain-language requests
- Checks against 26 patterns of AI writing
- Rewriting of pasted text or of a file you point to
- Optional voice matching from a writing sample
- Install paths for Claude Code, Codex, Claude.ai and other agents
Where Humanizer fits
- Detection of common AI writing tells
- Meaning-preserving rewrites
- File-level editing
- Voice matching from your own sample
- Use across Claude Code, Codex and other skills-compatible agents
Install
npx skills add blader/humanizer --global --agent '*'Reviews of Humanizer
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