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AI Check

AI Check is an agent skill (a SKILL.md file) from harshaneel/humanize. Agents load it when someone asks "does this sound AI?", "check if this is AI-written", "what gives this away as AI", "run ai-check on this", or "score this text". It works with Claude Code, Codex, Cursor, GitHub Copilot and OpenCode and has 579 GitHub stars.

github.com/harshaneel/humanize/plugins/humanize/skills/ai-check (opens in a new tab)

Data as of from the GitHub API; description from the skill's SKILL.md. Report an error

View on GitHub (opens in a new tab)

Add this skill

Claude

This repository is a Claude Code plugin marketplace. In Claude Code:

/plugin marketplace add harshaneel/humanize
/plugin install humanize@humanize

In the Claude apps, zip the ai-check folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

ChatGPT / Codex

Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:

git clone --depth 1 https://github.com/harshaneel/humanize.git
cp -r humanize/plugins/humanize/skills/ai-check .agents/skills/ai-check   # repo; ~/.agents/skills for all projects

Standalone skills also load in the ChatGPT desktop app.

Cursor

Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:

git clone --depth 1 https://github.com/harshaneel/humanize.git
cp -r humanize/plugins/humanize/skills/ai-check .cursor/skills/ai-check   # project; ~/.cursor/skills for all projects

Source (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), code.claude.com/docs/en/plugin-marketplaces (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)

What this skill does

Use when someone asks "does this sound AI?", "check if this is AI-written", "what gives this away as AI", "run ai-check on this", or "score this text". Also use when reviewing a draft for AI tells before publishing, or when a piece of text reads as suspiciously polished, generic, or pattern-y and the user wants a forensic breakdown of why. Forensic analysis of text for AI-generation signals. Grounded in the published detection literature (Wu et al. 2025, Mitchell et al.

When it triggers

  • Use when someone asks "does this sound AI?", "check if this is AI-written", "what gives this away as AI", "run ai-check on this", or "score this text".
  • use when reviewing a draft for AI tells before publishing, or when a piece of text reads as suspiciously polished, generic, or pattern-y and the user wants a forensic breakdown of why.
  • "does this sound AI?"
  • "check if this is AI-written"
  • "what gives this away as AI"
  • "run ai-check on this"
  • "score this text"

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FAQ

AI Check FAQ

Still curious? Email info@appsgit.com.

How do I install the AI Check skill?

In Claude Code, run /plugin marketplace add harshaneel/humanize and then /plugin install humanize@humanize. For Codex or Cursor, copy the ai-check folder into .agents/skills/ or .cursor/skills/.

Is the AI Check skill free?

Yes. The repository is open source under the MIT license.

Is AI Check maintained?

The repository's most recent commit was on Sep 22, 2026. appsgit only lists skills from repositories with a commit in the last six months.