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skills: Instructions file for Claude Code

CLAUDE.md

skills CLAUDE.md is an instructions file for Claude Code from ngmeyer/skills. It costs 938 tokens per session, scanned A, original, MIT.

Repository instructions for ngmeyer/skills, a published collection of coding-agent skills. They describe how skill folders, supporting files, tests, plugin metadata, and releases are organized.

In plain words
What is it for?
Use them when adding or editing a skill, updating plugin metadata, running its manual evaluation, or preparing a release.
Why use it?
They help contributors follow the repository’s layout and release rules, including the fact that publishing to the main branch is production. This reduces accidental publishing of incomplete or misplaced skills.

Instructions file for Claude Code

Written for Claude Code: Claude Code plugin machinery. Also seen: reads .claude/ paths; mentions .claude-plugin; mentions CLAUDE.md.

This is ngmeyer/skills's own configuration. It tells Claude Code how to work on skills itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything skills configures →

not rated 4repo 4d ago A scan 938 tokens original MIT
View source ↗ ngmeyer/skills
Reuse

Borrowing it

Nothing to install: this file belongs to ngmeyer/skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/ngmeyer/skills/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/ngmeyer/skills

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.

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README.md
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Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

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Per session 938 This file is loaded in full into every session.
When invoked 938 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00938 $0.00938
Opus 5.5 $0.00375 $0.00375
Sonnet 5.5 $0.00188 $0.00188
Haiku 4.5 $0.00094 $0.00094

Measured 2mo ago against content hash e6e67538fdf0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

skills CLAUDE.md 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 2mo 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.md · 50 lines

How it starts

The opening of the file, as written. The whole thing — 50 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This repo is a published library of agent skills (ngmeyer/skills). It is distributed via skills.sh (npx skills add ngmeyer/skills) and as a Claude Code plugin marketplace (/plugin marketplace add ngmeyer/skills).

Layout

  • skills/<category>/<name>/SKILL.md — one skill per directory. Shipping categories: engineering, productivity.
  • skills/<category>/<name>/references/ — progressive-disclosure depth, loaded on demand.
  • skills/<category>/<name>/scripts/ — deterministic helpers (sort, validate, format) the model shouldn't reason through.
  • skills/<category>/<name>/tests/eval.sh — structural eval asserting the SKILL.md's design contract. There is no CI — run it manually before pushing (see Releasing).
  • A skill dir holds only SKILL.md (+ optional references//scripts/) and tests/ (with tests/README.md documenting the eval). No root README.md inside a skill dir — SKILL.md is the doc.
  • .claude-plugin/plugin.json — lists the shipped skills + marketplace metadata (description, version, author).

Only ship-ready skills appear in plugin.json — that file is the canonical list of what ships (don't hardcode a count here; it drifts). New candidates incubate in a separate workspace until validated.

Adding or editing a skill

  1. Author with the skillforge skill (it enforces frontmatter, progressive disclosure, mandatory Gotchas).
  2. Frontmatter is name + description (Matt-Pocock convention). Keep SKILL.md under Anthropic's 500-line bar; push detail into references/.
  3. Add tests/eval.sh with structural assertions (heading shape, anti-pattern checks, portability — see existing skills for the pattern).
  4. Add the path to .claude-plugin/plugin.json.
  5. Optimize to V2 with skillforge optimize <skill> once it has a real outcome to measure; record the V1→V2 delta in the skill's ## Changelog.

Public-repo hygiene

Every commit to main is public. No skill may contain:

  • Hardcoded user paths (/Users/<name>, /Volumes/..., ~/.claude/projects/...). Use $HOME, ~, or placeholders.
  • Private project names, internal product/repo references, or business metrics in examples.
  • Secrets, secret locations, or credentials of any kind.

Read the full file on GitHub · 50 lines

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. 2mo ago First seen · 50 lines · 938 tokens per session scan A e6e67538fdf0

Subscribe to this mod's changes

skills CLAUDE.md is an instructions file published in the GitHub repository ngmeyer/skills (4 stars, last pushed 4d ago), licensed MIT. It adds 938 tokens to every session, about $0.0038 per session on Opus 5.5. 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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