skills: Instructions file for Claude Code

CLAUDE.md

skills CLAUDE.md is an instructions file for Claude Code from zth9/skills. It costs 442 tokens per session, scanned A, original, MIT.

A project instruction file for maintaining skills in a repository. It defines naming rules, commit-message language, required README updates, and how skill descriptions should explain both their purpose and trigger conditions.

In plain words
What is it for?
Use it when adding or renaming a skill, updating marketplace configuration, writing its description, or keeping the project's Chinese and English READMEs in sync.
Why use it?
It gives contributors consistent rules for creating, renaming, documenting, and publishing skills. This reduces mismatches between directory names, configuration, and user-facing documentation.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions .claude-plugin.

This is zth9/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 →

View source ↗ zth9/skills
Reuse

Borrowing it

Nothing to install: this file belongs to zth9/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/zth9/skills/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/zth9/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.

agentmods badge for skills CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/zth9/skills/claude-md/github.svg)](https://agentmods.dev/instructions/zth9/skills/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/zth9/skills/claude-md"><img src="https://agentmods.dev/badge/instructions/zth9/skills/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

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.

agentmods 80×15 button for skills CLAUDE.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/zth9/skills/claude-md"><img src="https://agentmods.dev/badge/instructions/zth9/skills/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 442 This file is loaded in full into every session.
When invoked 442 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 $0.00442 $0.00442
Opus 5.5 $0.00177 $0.00177
Sonnet 5.5 $0.00088 $0.00088
Haiku 4.5 $0.00044 $0.00044

Measured 2mo ago against content hash c4168e9c218d, 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 · 57 lines

What it actually says

Project Guidelines

Commit Rules

  • Commit messages must be in English

Skill Naming Convention

  • The skill directory name, SKILL.md name field, and plugin name must be identical
  • Use lowercase with hyphens (kebab-case), e.g., mac-notifier, mermaid-to-img
  • This ensures consistency between /skill-name commands and plugin management
  • When renaming a skill, update all three locations:
    1. Directory name
    2. SKILL.md name field
    3. .claude-plugin/marketplace.json plugin name and skills path

README Updates

  • When adding a new skill, update both README.md (Chinese) and README_EN.md (English)
  • Add the new skill to the "Available Skills" table in both files

Skill Description Rules

The description field in SKILL.md must include two parts:

  1. What it does: Brief description of the skill's functionality
  2. When to use: Tell the agent when to trigger this skill

Example format:

description: Convert Mermaid diagrams to images. Use when user wants to export/save/convert Mermaid code to PNG/JPG/SVG/PDF format.

Bad example (missing trigger condition):

description: Convert Mermaid diagrams to images.

Progressive Disclosure

To reduce token consumption, use progressive disclosure when a skill has many scripts or complex documentation:

  1. For skills with 3+ scripts: Create a scripts/INDEX.md file that briefly describes each script's purpose
  2. Main SKILL.md: Only include the most common usage and reference INDEX.md for details
  3. Detailed docs: Put comprehensive documentation in separate files (e.g., docs/ folder)

Example INDEX.md structure:

# Scripts Index

| Script | Purpose |
|--------|---------|
| main.py | Primary entry point for basic usage |
| install.sh | Installation and setup |
| utils.py | Internal utilities (not for direct use) |
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 · 57 lines · 442 tokens per session scan A c4168e9c218d

Subscribe to this mod's changes

skills CLAUDE.md is an instructions file published in the GitHub repository zth9/skills (2 stars, last pushed 7mo ago), licensed MIT. It adds 442 tokens to every session, about $0.0018 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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