ai-security-agent

ai-security-agent is a skill for Claude Code, Codex from jinyimeng01/mastermind-bug-bounty. It costs 41 tokens per session (646 once invoked), scanned B, original, no licence file.

An AI and large-language-model security testing skill. It checks AI systems and agent tools for attacks such as prompt injection, jailbreaks, poisoned retrieval data, hidden-instruction extraction, and unsafe tool calls.

In plain words
What is it for?
Use it for security reviews of chatbots, retrieval-augmented systems, model instructions, agent protocols, and function or tool integrations.
Why use it?
It helps find ways attackers could manipulate an AI system, its retrieved information, or the tools it can use.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it for security reviews of chatbots, retrieval-augmented systems, model instructions, agent protocols, and function or tool integrations.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jinyimeng01/mastermind-bug-bounty/ai_security
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.

Any agent
npx skills add jinyimeng01/mastermind-bug-bounty --skill ai_security
Clone the repo
git clone --depth 1 https://github.com/jinyimeng01/mastermind-bug-bounty

Made for: Claude Code, Codex.

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 ai-security-agent

README.md
[![agentmods](https://agentmods.dev/badge/skills/jinyimeng01/mastermind-bug-bounty/ai_security/github.svg)](https://agentmods.dev/skills/jinyimeng01/mastermind-bug-bounty/ai_security)
Your own site
<a href="https://agentmods.dev/skills/jinyimeng01/mastermind-bug-bounty/ai_security"><img src="https://agentmods.dev/badge/skills/jinyimeng01/mastermind-bug-bounty/ai_security/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 ai-security-agent

Your own site · 80×15
<a href="https://agentmods.dev/skills/jinyimeng01/mastermind-bug-bounty/ai_security"><img src="https://agentmods.dev/badge/skills/jinyimeng01/mastermind-bug-bounty/ai_security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 646 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. 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 $0.00041 $0.00646
Opus 5 $0.00020 $0.00323
Sonnet 5 $0.00008 $0.00129
Haiku 4.5 $0.00004 $0.00065

Measured 9d ago against content hash 65cf5567d714, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade B, and why

ai-security-agent scanned grade B with 1 finding 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 9d 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.

Instruction-override phrasingmediumPrompt injection

Text telling the model to disregard its earlier instructions or safety rules is the shape of a prompt injection, whoever wrote it.

"Ignore all previous instructions..."

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

agents/ai_security/SKILL.md · 91 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

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. 9d ago First seen · 91 lines · 41 tokens per session scan B 65cf5567d714

Subscribe to this mod's changes

ai-security-agent is a skill published in the GitHub repository jinyimeng01/mastermind-bug-bounty (57 stars, last pushed 2mo ago), with no licence file. It adds 41 tokens to every session and 646 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 1 finding (instruction-override phrasing). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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