no-frontmatter

no-frontmatter is a skill for Claude Code, Codex from Kewton/CommandMate. It costs 0 tokens per session (20 once invoked), scanned A, original, MIT.

A skill file without metadata at the top, using its containing folder name as the fallback name.

In plain words
What is it for?
Testing name discovery and fallback behavior for skills.
Why use it?
It checks how the system handles skill files when the usual metadata is missing.

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/kewton/commandmate/no-frontmatter
Any agent
npx skills add Kewton/CommandMate --skill no-frontmatter
Clone the repo
git clone --depth 1 https://github.com/Kewton/CommandMate

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 no-frontmatter

README.md
[![agentmods](https://agentmods.dev/badge/skills/kewton/commandmate/no-frontmatter.svg)](https://agentmods.dev/skills/kewton/commandmate/no-frontmatter)
Your own site
<a href="https://agentmods.dev/skills/kewton/commandmate/no-frontmatter"><img src="https://agentmods.dev/badge/skills/kewton/commandmate/no-frontmatter.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 20 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 $0.00000 $0.00020
Opus 5 $0.00000 $0.00010
Sonnet 5 $0.00000 $0.00004
Haiku 4.5 $0.00000 $0.00002

Measured 3d ago against content hash a3118e3bc604, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

no-frontmatter 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 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.

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.

tests/fixtures/skills/no-frontmatter/SKILL.md · 3 lines

What it actually says

This file has no frontmatter. The name should fallback to the directory name "no-frontmatter".

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 · 3 lines · 0 tokens per session scan A a3118e3bc604

Subscribe to this mod's changes

no-frontmatter is a skill published in the GitHub repository Kewton/CommandMate (39 stars, last pushed 3d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 20 tokens. 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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