Broken Skill Name

Broken Skill Name is a skill for Claude Code, Codex from Sagargupta16/skillcheck. It costs 3 tokens per session (23 once invoked), scanned A, original, MIT.

A test suite for checking Agent Skills, which are instruction packages for coding agents, against their specification and real agent runtimes.

In plain words
What is it for?
It is for linting SKILL.md files, testing skills with agent runtimes, and publishing a compatibility matrix.
Why use it?
It helps find skills that do not follow the specification or behave differently across agent systems.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: model in frontmatter.

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/sagargupta16/skillcheck/broken-skill
Any agent
npx skills add Sagargupta16/skillcheck --skill broken-skill
Clone the repo
git clone --depth 1 https://github.com/Sagargupta16/skillcheck

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 Name

README.md
[![agentmods](https://agentmods.dev/badge/skills/sagargupta16/skillcheck/broken-skill.svg)](https://agentmods.dev/skills/sagargupta16/skillcheck/broken-skill)
Your own site
<a href="https://agentmods.dev/skills/sagargupta16/skillcheck/broken-skill"><img src="https://agentmods.dev/badge/skills/sagargupta16/skillcheck/broken-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 3 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 23 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 5.1 $0.00003 $0.00023
Opus 5 $0.00002 $0.00012
Sonnet 5 $0.00001 $0.00005
Haiku 4.5 $0.00000 $0.00002

Measured 5d ago against content hash 78201453b5a9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

Broken Skill Name 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 5d 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.

fixtures/broken-skill/SKILL.md · 8 lines

The source is not reproduced here

Licensed MIT

The repository is licensed MIT, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

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. 5d ago First seen · 8 lines · 3 tokens per session scan A 78201453b5a9

Subscribe to this mod's changes

Broken Skill Name is a skill published in the GitHub repository Sagargupta16/skillcheck (5 stars, last pushed 2d ago), licensed MIT. It adds 3 tokens to every session and 23 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 2026-08-31.

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