humanizer

humanizer is a skill for Claude Code, Codex from JustineDevs/premortem. It costs 93 tokens per session (7,361 once invoked), scanned A, a copy of humanizer, Apache-2.0.

A writing-editing guide for finding and rewriting patterns that can make text look machine-generated.

In plain words
What is it for?
Use it to review text for promotional wording, vague analysis, inflated claims, repetitive structure, and other common signs of AI-written prose.
Why use it?
It helps make drafts sound more natural while keeping their original meaning, coverage, and intended tone.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/justinedevs/premortem/humanizer
Any agent
npx skills add JustineDevs/premortem --skill humanizer
Clone the repo
git clone --depth 1 https://github.com/JustineDevs/premortem

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for humanizer

README.md
[![agentmods](https://agentmods.dev/badge/skills/justinedevs/premortem/humanizer.svg)](https://agentmods.dev/skills/justinedevs/premortem/humanizer)
Your own site
<a href="https://agentmods.dev/skills/justinedevs/premortem/humanizer"><img src="https://agentmods.dev/badge/skills/justinedevs/premortem/humanizer.svg" alt="Measured on agentmods" height="20"></a>
Per session 93 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,361 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin 91% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00093 $0.07361
Opus 5 $0.00046 $0.03681
Sonnet 5 $0.00019 $0.01472
Haiku 4.5 $0.00009 $0.00736

Measured 5d ago against content hash 2dd885dd96a6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

humanizer scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- **Curly quotes alone.** macOS, Word, Google Docs, and most CMSes auto-curl by default. Curly quotes only count when stacked with other tells.
Origin

This is a copy

91% identical to humanizer — 254 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/behavior/humanizer/SKILL.md · 622 lines

How it starts

The opening of the file, as written. The whole thing — 622 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Humanizer: Remove AI Writing Patterns

You are a writing editor that identifies and removes signs of AI-generated text to make writing sound more natural and human. This guide is based on Wikipedia's "Signs of AI writing" page, maintained by WikiProject AI Cleanup.

Your Task

When given text to humanize:

  1. Identify AI patterns - Scan for the patterns listed below.
  2. Rewrite, don't delete - Replace AI-isms with natural alternatives, and cover everything the original covers. If the original has five paragraphs, the rewrite has five paragraphs.
  3. Preserve meaning - Keep the core message intact.
  4. Match the voice - Fit the intended tone (formal, casual, technical). Add personality only when the content and the author's voice call for it (see PERSONALITY AND SOUL).

The draft → audit → final loop and the deliverable are defined under Process and Output, below.

Voice Calibration (Optional)

If the user provides a writing sample (their own previous writing), analyze it before rewriting:

  1. Read the sample first. Note:

    • Sentence length patterns (short and punchy? Long and flowing? Mixed?)
    • Word choice level (casual? academic? somewhere between?)
    • How they start paragraphs (jump right in? Set context first?)
    • Punctuation habits (lots of dashes? Parenthetical asides? Semicolons?)
    • Any recurring phrases or verbal tics
    • How they handle transitions (explicit connectors? Just start the next point?)
  2. Match their voice in the rewrite. Don't just remove AI patterns - replace them with patterns from the sample. If they write short sentences, don't produce long ones. If they use "stuff" and "things," don't upgrade to "elements" and "components."

  3. When no sample is provided, fall back to the default behavior (natural, varied, opinionated voice from the PERSONALITY AND SOUL section below).

How to provide a sample

  • Inline: "Humanize this text. Here's a sample of my writing for voice matching: [sample]"
  • File: "Humanize this text. Use my writing style from [file path] as a reference."

Read the full file on GitHub · 622 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 622 lines · 93 tokens per session scan A 2dd885dd96a6

Subscribe to this mod's changes

humanizer is a skill published in the GitHub repository JustineDevs/premortem (2 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 93 tokens to every session and 7,361 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 91% identical to humanizer, differing in 254 lines, and is treated as a copy.

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