skill-validator

skill-validator is a skill for Claude Code from shawnclybor/clybor-claude-tooling. It costs 114 tokens per session (1,763 once invoked), scanned A, original, no licence file.

A testing tool for checking whether a coding-agent skill works correctly in a real code repository. It repeatedly runs the skill, compares its results with defined pass criteria, and applies fixes when needed.

In plain words
What is it for?
Use it to test a skill against representative inputs in a target repository and verify its results.
Why use it?
It helps find problems that a review of the skill's instructions alone may miss. It continues checking until the criteria pass or the available budget runs out.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Good fit Use it to test a skill against representative inputs in a target repository and verify its results.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/shawnclybor/clybor-claude-tooling/skill-validator
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 shawnclybor/clybor-claude-tooling --skill skill-validator
Clone the repo
git clone --depth 1 https://github.com/shawnclybor/clybor-claude-tooling

Made for: Claude Code.

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 skill-validator

README.md
[![agentmods](https://agentmods.dev/badge/skills/shawnclybor/clybor-claude-tooling/skill-validator.svg)](https://agentmods.dev/skills/shawnclybor/clybor-claude-tooling/skill-validator)
Your own site
<a href="https://agentmods.dev/skills/shawnclybor/clybor-claude-tooling/skill-validator"><img src="https://agentmods.dev/badge/skills/shawnclybor/clybor-claude-tooling/skill-validator.svg" alt="Measured on agentmods" height="20"></a>
Per session 114 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,763 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00114 $0.01763
Opus 5 $0.00057 $0.00881
Sonnet 5 $0.00023 $0.00353
Haiku 4.5 $0.00011 $0.00176

Measured 8d ago against content hash 06360a631b3f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

skill-validator 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 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.

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.

.claude/skills/skill-validator/SKILL.md · 126 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. 8d ago First seen · 126 lines · 114 tokens per session scan A 06360a631b3f

Subscribe to this mod's changes

skill-validator is a skill published in the GitHub repository shawnclybor/clybor-claude-tooling (5 stars, last pushed 3d ago), with no licence file. It adds 114 tokens to every session and 1,763 once invoked, about $0.0006 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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