flawed-skill

flawed-skill is a skill for Claude Code, Codex from richfrem/agent-plugins-skills. It costs 20 tokens per session (62 once invoked), scanned A, original, MIT.

A deliberately broken skill containing unsafe or poor instructions, such as using a hardcoded API key. It is a test example rather than a production tool.

In plain words
What is it for?
Use it as a fixture for validating skill audits and checking that dangerous instructions are flagged.
Why use it?
It helps test whether analysis can detect security and quality anti-patterns in skills.

Skill for Claude CodeCodex

Part of the agent-scaffolders plugin — 33 skills, 2 plugins shipped together

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/richfrem/agent-plugins-skills/flawed-skill
Any agent
npx skills add richfrem/agent-plugins-skills --skill flawed-skill
Clone the repo
git clone --depth 1 https://github.com/richfrem/agent-plugins-skills

Made for: Claude Code, Codex.

Or install agent-scaffolders, the plugin that ships this one along with the rest of its 33 skills, 2 plugins.

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 flawed-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/richfrem/agent-plugins-skills/flawed-skill.svg)](https://agentmods.dev/skills/richfrem/agent-plugins-skills/flawed-skill)
Your own site
<a href="https://agentmods.dev/skills/richfrem/agent-plugins-skills/flawed-skill"><img src="https://agentmods.dev/badge/skills/richfrem/agent-plugins-skills/flawed-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 62 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00020 $0.00062
Opus 5 $0.00010 $0.00031
Sonnet 5 $0.00004 $0.00012
Haiku 4.5 $0.00002 $0.00006

Measured yesterday against content hash c40c4ff3497c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

flawed-skill 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 yesterday.

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.

plugins/agent-scaffolders/tests/flawed-plugin/skills/flawed-skill/SKILL.md · 14 lines

What it actually says

Flawed Skill

This skill does things badly on purpose.

Steps

  1. Run the bash script
  2. Call the API with hardcoded key
  3. Profit
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. yesterday First seen · 14 lines · 20 tokens per session scan A c40c4ff3497c

Subscribe to this mod's changes

flawed-skill is a skill published in the GitHub repository richfrem/agent-plugins-skills (6 stars, last pushed yesterday), licensed MIT. It adds 20 tokens to every session and 62 once invoked, about $0.0001 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 2026-09-03.