# AI Check (agent skill)

> 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 518 GitHub stars.

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.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/harshaneel/humanize |
| Skill path | plugins/humanize/skills/ai-check/SKILL.md |
| Skill name | ai-check |
| GitHub stars | 518 |
| Installs on skills.sh | not listed |
| License | MIT |
| Skills in repo | 1 |
| Plugin marketplace | humanize |
| Official | no |
| Works with | Claude Code, Codex, Cursor, GitHub Copilot, OpenCode |
| Category | Security |
| Last commit | Sep 22, 2026 |

## 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"

## Add this skill

### Claude Code

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

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

### ChatGPT / Codex

```sh
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
```

### Cursor

```sh
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
```

Sources (checked 2026-10-07): https://code.claude.com/docs/en/skills, https://support.claude.com/en/articles/12512180-using-skills-in-claude, https://learn.chatgpt.com/docs/build-skills, https://cursor.com/docs/context/skills

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Canonical page: https://appsgit.com/skills/harshaneel-ai-check
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