Judge Model Fingerprint Detection

Judge Model Fingerprint Detection is an agent for Claude Code from KevinRabun/judges. It costs 49 tokens per session (404 once invoked), scanned A, original, MIT.

An evaluator that looks for writing and code patterns associated with AI code generators such as ChatGPT, Claude, Copilot, and Gemini.

In plain words
What is it for?
Use it to review code for multiple signals of AI generation, including tutorial-like comments, unfinished TODOs, conversational comments, copied prompt-style structure, and explicit AI references.
Why use it?
It can flag possible model-specific habits, biases, hallucinations, or blind spots in code without treating those patterns as definite errors.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

Good fit Use it to review code for multiple signals of AI generation, including tutorial-like comments, unfinished TODOs, conversational comments, copied prompt-style structure, and explicit AI references.

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Install with agentmods
npx agentmods add agents/kevinrabun/judges/model-fingerprint.judge
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.

Clone the repo
git clone --depth 1 https://github.com/KevinRabun/judges

Made for: Claude Code.

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 Judge Model Fingerprint Detection

README.md
[![agentmods](https://agentmods.dev/badge/agents/kevinrabun/judges/model-fingerprint.judge/github.svg)](https://agentmods.dev/agents/kevinrabun/judges/model-fingerprint.judge)
Your own site
<a href="https://agentmods.dev/agents/kevinrabun/judges/model-fingerprint.judge"><img src="https://agentmods.dev/badge/agents/kevinrabun/judges/model-fingerprint.judge/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for Judge Model Fingerprint Detection

Your own site · 80×15
<a href="https://agentmods.dev/agents/kevinrabun/judges/model-fingerprint.judge"><img src="https://agentmods.dev/badge/agents/kevinrabun/judges/model-fingerprint.judge.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 49 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 404 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found 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 $0.00049 $0.00404
Opus 5 $0.00024 $0.00202
Sonnet 5 $0.00010 $0.00081
Haiku 4.5 $0.00005 $0.00040

Measured 11d ago against content hash d5609cb6977a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

Judge Model Fingerprint Detection scanned grade A with 0 findings 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 11d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agents/model-fingerprint.judge.md · 32 lines

What it actually says

You are Judge Model Fingerprint Detection — an expert in identifying stylistic signatures of AI-generated code.

YOUR EVALUATION CRITERIA:

  1. ChatGPT/GPT-4 Fingerprints: Tutorial-style step-numbered comments ("Step 1:", "Step 2:"), overly pedagogical inline explanations, demo-quality console.log statements.
  2. Copilot Fingerprints: TODO/FIXME stub functions auto-completed without implementation, attribution comments referencing Copilot.
  3. Claude Fingerprints: Conversational first-person comments ("I'll", "Let me", "Here's how"), unusually dense JSDoc with philosophical preambles.
  4. Gemini Fingerprints: Inline URL references to documentation, code structured as if answering a prompt.
  5. Generic AI Signals: Explicit AI attribution comments, decorative ASCII dividers, boilerplate patterns that suggest copy-paste from chat.

SEVERITY MAPPING:

  • info: All model fingerprint detections — these are informational, not errors

FALSE POSITIVE AVOIDANCE:

  • Require at least two distinct signal types before flagging.
  • Do NOT flag well-written documentation simply because it is thorough.
  • Single generic comments are not sufficient evidence.

ADVERSARIAL MANDATE:

  • Flag AI-generated code that may carry model-specific biases or blind spots.
  • Treat provenance transparency as a code quality concern.
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. 11d ago First seen · 32 lines · 49 tokens per session scan A d5609cb6977a

Subscribe to this mod's changes

Judge Model Fingerprint Detection is an agent published in the GitHub repository KevinRabun/judges (7 stars, last pushed 2mo ago), licensed MIT. It adds 49 tokens to every session and 404 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.