cmdi-command-injection

cmdi-command-injection is a skill for Claude Code, Codex from Prohao42/aimy-skill. It costs 36 tokens per session (5,956 once invoked), scanned B, original, no licence file.

A guide to finding command injection risks, where user-controlled text is included in a shell command or another program execution step.

In plain words
What is it for?
Use it to review shell calls, process execution, file converters, import pipelines, and systems that report command results indirectly.
Why use it?
It helps reveal when input intended as data could make the system run unintended commands.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/prohao42/aimy-skill/cmdi-command-injection
Any agent
npx skills add Prohao42/aimy-skill --skill cmdi-command-injection
Clone the repo
git clone --depth 1 https://github.com/Prohao42/aimy-skill

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 cmdi-command-injection

README.md
[![agentmods](https://agentmods.dev/badge/skills/prohao42/aimy-skill/cmdi-command-injection.svg)](https://agentmods.dev/skills/prohao42/aimy-skill/cmdi-command-injection)
Your own site
<a href="https://agentmods.dev/skills/prohao42/aimy-skill/cmdi-command-injection"><img src="https://agentmods.dev/badge/skills/prohao42/aimy-skill/cmdi-command-injection.svg" alt="Measured on agentmods" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,956 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 3 findings. Scan, not verified.
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 $0.00036 $0.05956
Opus 5 $0.00018 $0.02978
Sonnet 5 $0.00007 $0.01191
Haiku 4.5 $0.00004 $0.00596

Measured 3d ago against content hash 1f01c44613fb, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

cmdi-command-injection scanned grade B with 3 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 3d 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.

Reaches for credential filesmediumPrivilege escalation

SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.

; cat /etc/shadow # password hashes (if root)

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.

os.system("curl " + url) # url = "x.com; id"

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

os.system("curl " + url) # url = "x.com; id"
ai-mian/hack-skills/skills/cmdi-command-injection/SKILL.md · 688 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. 3d ago First seen · 688 lines · 36 tokens per session scan B 1f01c44613fb

Subscribe to this mod's changes

cmdi-command-injection is a skill published in the GitHub repository Prohao42/aimy-skill (135 stars, last pushed 10d ago), with no licence file. It adds 36 tokens to every session and 5,956 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 3 findings (reaches for credential files, makes network calls, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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