PromptInjection

PromptInjection is a skill for Claude Code, Codex from jSydorowicz21/Universal-AI-Infrustructure. It costs 86 tokens per session (1,908 once invoked), scanned A, original, no licence file.

A security-testing process for finding prompt-injection weaknesses in applications that use language models. Prompt injection is an attempt to make an AI ignore its instructions, reveal hidden context, or take an unintended action.

In plain words
What is it for?
It is for testing jailbreaks, direct and indirect injections, multi-stage attacks, guardrails, and AI application security.
Why use it?
It exposes ways attackers may bypass safeguards, manipulate context, or extract system prompts.

Skill for Claude CodeCodex

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

Good fit It is for testing jailbreaks, direct and indirect injections, multi-stage attacks, guardrails, and AI application security.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jsydorowicz21/universal-ai-infrustructure/promptinjection
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 jSydorowicz21/Universal-AI-Infrustructure --skill promptinjection
Clone the repo
git clone --depth 1 https://github.com/jSydorowicz21/Universal-AI-Infrustructure

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 PromptInjection

README.md
[![agentmods](https://agentmods.dev/badge/skills/jsydorowicz21/universal-ai-infrustructure/promptinjection/github.svg)](https://agentmods.dev/skills/jsydorowicz21/universal-ai-infrustructure/promptinjection)
Your own site
<a href="https://agentmods.dev/skills/jsydorowicz21/universal-ai-infrustructure/promptinjection"><img src="https://agentmods.dev/badge/skills/jsydorowicz21/universal-ai-infrustructure/promptinjection/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 PromptInjection

Your own site · 80×15
<a href="https://agentmods.dev/skills/jsydorowicz21/universal-ai-infrustructure/promptinjection"><img src="https://agentmods.dev/badge/skills/jsydorowicz21/universal-ai-infrustructure/promptinjection.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 86 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,908 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 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 $0.00086 $0.01908
Opus 5 $0.00043 $0.00954
Sonnet 5 $0.00017 $0.00382
Haiku 4.5 $0.00009 $0.00191

Measured 8d ago against content hash 0705551d2e3e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

PromptInjection scanned grade A 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 8d 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.

Makes network callslowCapability

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

curl -s -X POST http://localhost:8888/notify \
Packs/Security/src/PromptInjection/SKILL.md · 268 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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. 8d ago First seen · 268 lines · 86 tokens per session scan A 0705551d2e3e

Subscribe to this mod's changes

PromptInjection is a skill published in the GitHub repository jSydorowicz21/Universal-AI-Infrustructure (2 stars, last pushed 12d ago), with no licence file. It adds 86 tokens to every session and 1,908 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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