Humanizer

Humanizer rewrites AI-sounding text so it reads like a person wrote it, without changing what it says. Because it is just Markdown, it works with any agent that supports skills.

Installation

Install Humanizer with the Skills CLI:

npx skills add blader/humanizer --global

Leave off --global to install Humanizer only in the current project. Add --agent <name> or --agent '*' to choose which agents receive it, then reload their skills. The skill answers to /humanizer.

Claude Code 2.1.142 or newer can install the plugin instead:

/plugin marketplace add blader/humanizer
/plugin install humanizer@humanizer

The plugin answers to /humanizer:humanizer.

In Claude Desktop, download this repository as a ZIP and upload it as a skill. For a manual install, copy SKILL.md into the agent's skill folder.

Usage

Call the skill directly:

/humanizer

[paste your text here]

Or ask in plain language:

Please humanize this text: [your text]

To rewrite a file, give Humanizer its path:

Humanize the prose in docs/launch-post.md

Match your voice

If you want the rewrite to sound more like you, include a sample:

/humanizer

Here's a sample of my writing for voice matching:
[paste 2-3 paragraphs of your own writing]

Now humanize this text:
[paste AI text to humanize]

Humanizer follows the sample's rhythm, word choice, punctuation, and deliberate quirks, including dashes if you use them.

How it works

A language model writes whatever is most likely to come next, so by default it makes the choice that fits the widest range of readers and subjects. A person chooses for one reader and one subject. Every tell Humanizer looks for is a form of that default choice: a sentence that signals importance instead of adding a fact, rhythm or formatting applied by rule, an ordinary fact dressed as a pivotal one, or text left over from the chat.

"LLMs use statistical algorithms to guess what should come next. The result tends toward the most statistically likely result that applies to the widest variety of cases." Wikipedia, "Signs of AI writing"

Humanizer marks every tell it finds, strongest first. It drafts a rewrite without treating the original structure as fixed, checks the draft against the patterns and the original claims, and then writes the final version. It does not make things up. A name, number, date, quote, citation, or other factual detail must come from the source or the writer, and if a sentence needs a detail that is missing, Humanizer asks instead of inventing one.

When you paste text, Humanizer shows its work: the first rewrite, a short critique of anything that still sounds artificial, and the final version. Point it at a file and it changes only the prose, leaving code, data, frontmatter, and link targets alone. Personal writing keeps the writer's opinions and quirks. Technical and reference prose stays neutral and plain.

The 25 patterns

The patterns are numbered by strength and frequency. The first five justify an edit on a single sighting. Patterns marked weak alone count only when several tells share a passage, because a careful writer may use any one of them on purpose.

A. Staging instead of stating

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