The gist

Humanizer is an open-source skill for the Claude Code and OpenCode development tools. Created by GitHub user 'blader', it solves the problem of AI-generated text sounding robotic and unnatural. The tool analyzes text against 29 common patterns—such as filler words, promotional language, and awkward phrasing—and rewrites it to have a more human-like tone and style, based on a guide from Wikipedia's AI Cleanup project.

What it does

Rewrites AI-generated text to sound more natural and less formulaic.
Detects and removes 29 common AI writing patterns, from filler phrases to stylistic tics.
Corrects language issues like passive voice, synonym cycling, and vague attributions.
Calibrates the rewriting process to match a user's personal writing style from a sample.
Strips out chatbot artifacts like disclaimers and sycophantic greetings.
Simplifies sentence structure by removing unnecessary clauses and jargon.

How it works

Humanizer is installed as a 'skill' within the Claude Code or OpenCode environments. A user invokes it via a command (/humanizer) and provides the AI-generated text. The tool applies a set of 29 rules to rewrite the text and performs a final audit pass to catch remaining issues. It's a free, open-source tool, and users can provide samples of their own writing to calibrate the output voice.

Best for

This tool is ideal for developers using Claude Code or OpenCode who want to refine AI-generated text for documentation, comments, or commit messages to sound more natural.

Watch out for

Humanizer is not a standalone application; it requires either the Claude Code or OpenCode tool to be installed first.