ai-agent-security

ai-agent-security is a skill for Claude Code, Codex from ranbot-ai/awesome-skills. It costs 25 tokens per session (1,288 once invoked), scanned B, original, no licence file.

An AI-agent security guide covering prompt injection, tool misuse, and data theft. Prompt injection is an attack in which untrusted text tries to make an agent ignore its instructions.

In plain words
What is it for?
Use it to design layered defenses against prompt injection, unsafe tool use, and data exfiltration.
Why use it?
It helps protect agents that read outside content or use tools from following malicious instructions or exposing information.

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 to design layered defenses against prompt injection, unsafe tool use, and data exfiltration.

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Install with agentmods
npx agentmods add skills/ranbot-ai/awesome-skills/ai-agent-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 ranbot-ai/awesome-skills --skill ai-agent-security
Clone the repo
git clone --depth 1 https://github.com/ranbot-ai/awesome-skills

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-agent-security

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/ranbot-ai/awesome-skills/ai-agent-security"><img src="https://agentmods.dev/badge/skills/ranbot-ai/awesome-skills/ai-agent-security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,288 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 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 $0.00025 $0.01288
Opus 5.5 $0.00010 $0.00515
Sonnet 5.5 $0.00005 $0.00258
Haiku 4.5 $0.00003 $0.00129

Measured 26d ago against content hash ea1797578156, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

ai-agent-security scanned grade B with 2 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 26d 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.

Harvests environment variablesmediumData exfiltration

Enumerating or grepping the environment for keys collects credentials unrelated to what the mod says it does.

**Privilege Escalation** — The agent chains low-privilege tool calls to achieve high-privilege outcomes (e.g., read config -> extract credentials -> call admin API).

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

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

(r"(?:curl|wget|nc|ncat)\s+", "network_command_inject"),
skills/ai-agent-security/SKILL.md · 132 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. 26d ago First seen · 132 lines · 25 tokens per session scan B ea1797578156

Subscribe to this mod's changes

ai-agent-security is a skill published in the GitHub repository ranbot-ai/awesome-skills (7 stars, last pushed yesterday), with no licence file. It adds 25 tokens to every session and 1,288 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it B with 2 findings (harvests environment variables, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-21.

Related

Other skills, from other repositories