broken-skill

broken-skill is a skill for Claude Code, Codex from NickCirv/engram. It costs 9 tokens per session (65 once invoked), scanned A, original, Apache-2.0.

A test fixture containing deliberately corrupted YAML instructions. YAML is a text format commonly used for configuration files.

In plain words
What is it for?
Use it in tests that verify corrupted skill files are skipped or reported as anomalies.
Why use it?
It lets a parser or miner be tested against malformed input and checked for graceful handling instead of a crash.

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/nickcirv/engram/corrupted
Any agent
npx skills add NickCirv/engram --skill corrupted
Clone the repo
git clone --depth 1 https://github.com/NickCirv/engram

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 broken-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/nickcirv/engram/corrupted.svg)](https://agentmods.dev/skills/nickcirv/engram/corrupted)
Your own site
<a href="https://agentmods.dev/skills/nickcirv/engram/corrupted"><img src="https://agentmods.dev/badge/skills/nickcirv/engram/corrupted.svg" alt="Measured on agentmods" height="20"></a>
Per session 9 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 65 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 $0.00009 $0.00065
Opus 5 $0.00005 $0.00032
Sonnet 5 $0.00002 $0.00013
Haiku 4.5 $0.00001 $0.00006

Measured 4d ago against content hash dd10f2117b48, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

broken-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 4d 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.

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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

tests/fixtures/skills/corrupted/SKILL.md · 10 lines

What it actually says

Broken

This file has a corrupted YAML frontmatter (unterminated quote, missing close). The miner should degrade gracefully — either treat as anomaly or skip entirely, but MUST NOT crash.

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. 4d ago First seen · 10 lines · 0 tokens per session scan A dd10f2117b48

Subscribe to this mod's changes

broken-skill is a skill published in the GitHub repository NickCirv/engram (141 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 9 tokens to every session and 65 once invoked, about $0.0000 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 2026-08-30.

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