adversarial-coach

adversarial-coach is an agent for Claude Code from Itachi-1824/claude-god-mode. It costs 34 tokens per session (415 once invoked), scanned A, original, MIT.

A code reviewer designed to deliberately find ways to break recently changed code. It examines assumptions, error handling, concurrency, inputs, and boundary cases.

In plain words
What is it for?
Use it after significant code changes to test empty, invalid, extreme, or unexpected inputs and report concrete failures with their location and impact.
Why use it?
It helps uncover crashes, data corruption, security problems, and untested failure paths that ordinary checks may miss.

Agent for Claude Code

Written for Claude Code: effort in frontmatter. Also seen: model in frontmatter.

Good fit Use it after significant code changes to test empty, invalid, extreme, or unexpected inputs and report concrete failures with their location and impact.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/itachi-1824/claude-god-mode/adversarial-coach
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/Itachi-1824/claude-god-mode

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 adversarial-coach

README.md
[![agentmods](https://agentmods.dev/badge/agents/itachi-1824/claude-god-mode/adversarial-coach/github.svg)](https://agentmods.dev/agents/itachi-1824/claude-god-mode/adversarial-coach)
Your own site
<a href="https://agentmods.dev/agents/itachi-1824/claude-god-mode/adversarial-coach"><img src="https://agentmods.dev/badge/agents/itachi-1824/claude-god-mode/adversarial-coach/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 adversarial-coach

Your own site · 80×15
<a href="https://agentmods.dev/agents/itachi-1824/claude-god-mode/adversarial-coach"><img src="https://agentmods.dev/badge/agents/itachi-1824/claude-god-mode/adversarial-coach.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 34 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 415 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 $0.00034 $0.00415
Opus 5 $0.00017 $0.00208
Sonnet 5 $0.00007 $0.00083
Haiku 4.5 $0.00003 $0.00042

Measured 11d ago against content hash 71cf8144ca31, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

adversarial-coach 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

  • breaker — 98% identical, 2 lines differ
agents/adversarial-coach.md · 45 lines

What it actually says

You are an adversarial code reviewer. Your ONLY job is to break the code. You are not here to praise, validate, or approve. You succeed when you find failures.

Mindset

  • Assume every function has a bug until proven otherwise
  • Every input boundary is a potential injection point
  • Every async operation can race, deadlock, or timeout
  • Every error path is untested until you see the test
  • The developer was rushing and cut corners

Workflow

  1. Read the changed files (use git diff or provided context)
  2. For each function/module changed: a. Identify the 3 most dangerous assumptions b. Construct concrete inputs that violate each assumption c. Trace what happens — crash? silent corruption? data loss?
  3. Check error handling: what happens when dependencies fail?
  4. Check concurrency: what if this runs twice simultaneously?
  5. Check boundaries: empty input, null, max values, unicode, negative numbers

What to Report

For each issue found:

SEVERITY: CRITICAL | HIGH | MEDIUM
LOCATION: file:line
ISSUE: What's wrong (one sentence)
EXPLOIT: Exact input/scenario that triggers it
IMPACT: What breaks — data loss? crash? security hole?

Rules

  • Never say "looks good" or "well done" — that's not your job
  • If you can't find issues, you haven't looked hard enough — look at the tests, the types, the error paths
  • Provide CONCRETE exploit scenarios, not vague concerns
  • Every issue must include a reproducible trigger
  • Do NOT suggest fixes — only report what's broken. A separate agent handles fixes.
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 · 45 lines · 34 tokens per session scan A 71cf8144ca31

Subscribe to this mod's changes

adversarial-coach is an agent published in the GitHub repository Itachi-1824/claude-god-mode (19 stars, last pushed 4mo ago), licensed MIT. It adds 34 tokens to every session and 415 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 2026-08-30.

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