explaingit

0xalexhex/redjudge

Analysis updated 2026-05-18

2PythonAudience · researcherComplexity · 4/5Setup · moderate

TLDR

An authorized red-team testing harness that checks how well AI language models resist jailbreak, injection, and tool-abuse attacks.

Mindmap

mindmap
  root((RedJudge))
    What it does
      Tests LLM robustness
      Jailbreak attempts
      Prompt injection tests
    Tech stack
      Python
      Llama Guard judge
      StrongREJECT judge
    Attack suites
      Injection
      Agentic tool abuse
      Multimodal image
    Use cases
      Authorized red teaming
      Model comparison
    Audience
      AI safety researchers

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What do people build with it?

USE CASE 1

Run authorized robustness tests against a locally hosted or API-based language model.

USE CASE 2

Measure how well a model resists indirect prompt injection hidden in content it reads.

USE CASE 3

Test whether an AI agent can be tricked through fake tool output into taking a harmful action.

USE CASE 4

Compare multiple models head-to-head on the same set of adversarial test prompts.

What is it built with?

PythonLlama GuardStrongREJECT

How does it compare?

0xalexhex/redjudge0-bingwu-0/live-interpreter0cm-labs/tokenizer-benchmark
Stars222
LanguagePythonPythonPython
Setup difficultymoderatemoderatemoderate
Complexity4/52/52/5
Audienceresearchergeneralresearcher

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · moderate Time to first run · 30min

Real harmful-content benchmarks must be downloaded separately, some features require a local model with GPU access.

In plain English

RedJudge is a testing tool for checking how well an AI language model resists being tricked into producing content it should refuse, sometimes called jailbreaking. It is meant for authorized safety testing, not for causing real harm, and it ships only mild, safe test prompts by default. If you want to run it against real harmful content benchmarks, you need to supply those datasets yourself through a separate download script, since none of that content is included in the project itself. The tool works by combining four pieces you can mix and match: a behavior, meaning the type of prompt you are testing with, an attack method, meaning a technique for trying to get past the model's safety training, a target, meaning the specific AI model being tested, whether that is a locally running model, one accessed through an API, or in specific authorized cases a web chat interface, and a judge, meaning a system that grades whether the attack actually succeeded. Rather than relying on one single grading method, which can produce misleading numbers, it combines multiple established grading systems together so the final score is more trustworthy. Beyond basic single attempt attacks, it includes ready made test suites for newer categories of risk: hidden instructions smuggled into content the model reads, an AI agent being tricked through fake tool results into taking a harmful action like deleting something or sending money, and hidden instructions written as text inside an image shown to a model that can see images. There is also a persistent chat mode for holding an extended, multi-turn conversation with a target model to test whether repeated pressure over many messages can wear down its defenses. The README lists several capabilities the project does not yet have, including certain advanced attack techniques that require direct access to a model's internal workings, and notes these are planned for future development. The project is set up to be extended with your own testing methods by writing a small plugin. No license file is mentioned in the parts of the README reviewed, so its usage terms are unclear.

Copy-paste prompts

Prompt 1
Walk me through running RedJudge's offline smoke test with no external credentials or network access.
Prompt 2
Explain how RedJudge's judge system combines multiple graders to score whether an attack succeeded.
Prompt 3
Help me write a custom plugin to add a new attack technique to RedJudge.
Prompt 4
Show me how to fetch the standard benchmark datasets RedJudge needs for a real evaluation run.

Frequently asked questions

What is redjudge?

An authorized red-team testing harness that checks how well AI language models resist jailbreak, injection, and tool-abuse attacks.

What language is redjudge written in?

Mainly Python. The stack also includes Python, Llama Guard, StrongREJECT.

How hard is redjudge to set up?

Setup difficulty is rated moderate, with roughly 30min to a first successful run.

Who is redjudge for?

Mainly researcher.

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