What is agent-skills CLAUDE.md?

A set of Claude Code instructions for developing and validating skills in a skills repository. It describes the required SKILL.md and README.md files, optional supporting folders, and the skills command-line validator.

Use it when creating or maintaining skills with instructions, scripts, assets, references, themes, or tests in the specified repository.

It gives contributors a consistent structure and validation process for skills, so required files and documentation are not missed.

How eins78/agent-skills configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to eins78/agent-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/eins78/agent-skills/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/eins78/agent-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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/eins78/agent-skills/claude-md/github.svg)](https://agentmods.dev/instructions/eins78/agent-skills/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/eins78/agent-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/eins78/agent-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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/eins78/agent-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/eins78/agent-skills/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 2,775 This file is loaded in full into every session.

When invoked 2,775 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.

Model	Per session	Once invoked
Fable 5.1	$0.02775	$0.02775
Opus 5.5	$0.01110	$0.01110
Sonnet 5.5	$0.00555	$0.00555
Haiku 4.5	$0.00278	$0.00278

Measured 19d ago against content hash ac483eaf8104, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

agent-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 19d 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 · 248 lines

How it starts

The opening of the file, as written. The whole thing — 248 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skills Repository

Agent Skills collection for Claude Code, following the agentskills.io spec.

Uses the skills CLI for validation.

Skill Format

Each skill lives in its own directory under skills/ and consists of:

skills/<skill-name>/
├── SKILL.md      # The skill itself (frontmatter + instructions)
└── README.md     # Development documentation (REQUIRED)

Skills may also bundle additional directories as needed:

scripts/ — executable wrappers referenced from SKILL.md via ${CLAUDE_SKILL_DIR}/scripts/...
themes/ / assets/ — stylesheets, templates, or other static files used by scripts
references/ — deep-dive docs loaded on demand, not auto-included
tests/ — optional post-install smoke tests (not run by pnpm test; provide a manual command in the skill's README so contributors and post-install users can verify the setup works)

SKILL.md

YAML frontmatter followed by markdown instructions:

---
name: skill-name
description: When to activate and what the skill covers.
globs: ["**/*.ts", "**/*.tsx"]
license: MIT
---

The markdown body contains patterns, rules, and examples that Claude follows when the skill is active.

README.md (required)

Every skill directory must contain a README.md with development documentation:

Purpose and scope of the skill
Skill tier (publishable/reusable vs project-specific)
How the skill was tested and validated
Provenance (where patterns originated)
Known gaps and planned improvements

Validation

pnpm test        # runs: skills add . --list

This lists all discovered skills and exits non-zero if any skill fails to parse.

Digraph Rendering

If SKILL.md contains ```dot blocks:

Create diagrams/ directory in skill folder
Run .dev/scripts/render-digraphs.sh SKILL.md ./diagrams
Commit both .dot and .png files
Reference images in SKILL.md where helpful

Requires: brew install graphviz

Read the full file on GitHub · 248 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.

19d ago Changed · +2 lines · +126 tokens per session ac483eaf8104
2mo ago First seen · 246 lines · 2,649 tokens per session scan A 3ab9707c036d

Subscribe to this mod's changes

agent-skills CLAUDE.md is an instructions file published in the GitHub repository eins78/agent-skills (2 stars, last pushed 5d ago), licensed MIT. It adds 2,775 tokens to every session, about $0.0111 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.

agent-skills claude-code-skills

agent-skills CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
agent-skills CLAUDE.mdeins78/agent-skills	Instructions file	2	5d ago	MIT	A	2,775	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

agent-skills: Instructions file for Claude Code