R-adversarial

R-adversarial is an agent for Claude Code from Roxabi/roxabi-plugins. It costs 310 tokens per session (2,588 once invoked), scanned A, original, AGPL-3.0.

A red-team agent that challenges specifications, code changes, analyses, designs, and proposals. It looks for weak assumptions, ineffective safeguards, partial failures, security issues, and injection risks.

In plain words
What is it for?
Use it to attack a proposed design or change from a skeptical viewpoint and to review security-sensitive decisions.
Why use it?
It exposes problems that a supportive review may miss before they reach users or production systems.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the dev-core plugin — 31 skills, 10 agents, 2 hooks shipped together

Good fit Use it to attack a proposed design or change from a skeptical viewpoint and to review security-sensitive decisions.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/roxabi/roxabi-plugins/r-adversarial
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/Roxabi/roxabi-plugins

Made for: Claude Code.

Or install dev-core, the plugin that ships this one along with the rest of its 31 skills, 10 agents, 2 hooks.

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 R-adversarial

README.md
[![agentmods](https://agentmods.dev/badge/agents/roxabi/roxabi-plugins/r-adversarial/github.svg)](https://agentmods.dev/agents/roxabi/roxabi-plugins/r-adversarial)
Your own site
<a href="https://agentmods.dev/agents/roxabi/roxabi-plugins/r-adversarial"><img src="https://agentmods.dev/badge/agents/roxabi/roxabi-plugins/r-adversarial/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 R-adversarial

Your own site · 80×15
<a href="https://agentmods.dev/agents/roxabi/roxabi-plugins/r-adversarial"><img src="https://agentmods.dev/badge/agents/roxabi/roxabi-plugins/r-adversarial.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 310 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,588 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 unknown 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 $0.00310 $0.02588
Opus 5.5 $0.00124 $0.01035
Sonnet 5.5 $0.00062 $0.00518
Haiku 4.5 $0.00031 $0.00259

Measured 1mo ago against content hash 414c3e9616fa, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

R-adversarial 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 1mo 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.

archived/plugins/dev-core/agents/R-adversarial.md · 196 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 1mo ago Changed · +2 lines 414c3e9616fa
  2. 1mo ago First seen · 194 lines · 310 tokens per session scan A 2777e30c2884

Subscribe to this mod's changes

R-adversarial is an agent published in the GitHub repository Roxabi/roxabi-plugins (9 stars, last pushed today), licensed AGPL-3.0. It adds 310 tokens to every session and 2,588 once invoked, about $0.0012 per session on Opus 5.5. 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 2026-09-06.