What is claude-skills CLAUDE.md?

A set of project instructions for a marketplace of Claude Code skills distributed as plugins. It describes the required folders and files, existing skills, and checks for adding or changing a skill.

Use it when creating or modifying a skill, updating plugin metadata, following the repository checklist, or running its validation and test commands.

It reduces uncertainty about how this repository is organised and what must be checked before declaring work complete. It also helps keep new skills consistent with the project format.

How sam-dumont/claude-skills configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to sam-dumont/claude-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/sam-dumont/claude-skills/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/sam-dumont/claude-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/sam-dumont/claude-skills/claude-md/github.svg)](https://agentmods.dev/instructions/sam-dumont/claude-skills/claude-md)

Your own site

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

Per session 1,102 This file is loaded in full into every session.

When invoked 1,102 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	$0.01102	$0.01102
Opus 5	$0.00551	$0.00551
Sonnet 5	$0.00220	$0.00220
Haiku 4.5	$0.00110	$0.00110

Measured 10d ago against content hash 6a46e18c4cb4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

claude-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 10d 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 · 96 lines

How it starts

The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Claude Skills — Project Instructions

What This Repo Is

A marketplace of Claude Code skills distributed as plugins. Each skill lives under plugins/<name>/ with a standard structure.

Skill Plugin Structure

Every skill follows this exact layout:

plugins/{skill-name}/
├── .claude-plugin/
│   └── plugin.json          # Metadata: name, version, description, author, keywords
└── skills/
    └── {skill-name}/
        └── SKILL.md         # Skill definition with YAML frontmatter (name + description triggers)

Optional: a templates/ directory for supporting materials (see sams-voice for an example).

Current Skills

Skill	Purpose
sams-voice	Writing voice and style (English/French)
sams-architecture	Architectural patterns (Python/DevOps/Embedded/Frontend)
outcome-engineering	Outcome-first workflow framing (o16g)
technical-blog-post	Technical blog post writing from raw project data
sketch-checker	Metal band fascist/NSBM ties research with parallel agent methodology
code-quality	Python code quality setup & checks (ruff, mypy, xenon, vulture, pre-commit)
advanced-code-quality	Advanced Python quality gates (cognitive complexity, duplication, architecture, dependency hygiene, AI code detection)
code-security	Python security scanning — static tools (Bandit, pip-audit) + LLM-powered dynamic analysis

Mandatory Checklist: Adding or Modifying a Skill

When a skill is added, removed, renamed, or has its description changed, ALL of the following files MUST be updated in the SAME commit. No exceptions.

New Skill

Create plugins/{name}/.claude-plugin/plugin.json — follow the exact schema of existing plugins (name, version "1.0.0", description, author Sam Dumont/[email protected], homepage, repository, license MIT, keywords)
Create plugins/{name}/skills/{name}/SKILL.md — YAML frontmatter with name and description (trigger patterns), then full skill content
Add entry to .claude-plugin/marketplace.json in the plugins array — name, source (./plugins/{name}), description, version, author, keywords
Add skill to .github/workflows/release.yml — both in the "Available Skills" list AND the installation commands block
Update README.md:
- Add row to the "Available Skills" table
- Add install command in the Installation section
- Add the skill to the "For Teams" settings.json example
- Add a description section under "Skill Descriptions"
- Add the skill to the "Repository Structure" tree
Update CLAUDE.md (this file) — add the skill to the "Current Skills" table above

Read the full file on GitHub · 96 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.

10d ago First seen · 96 lines · 1,102 tokens per session scan A 6a46e18c4cb4

Subscribe to this mod's changes

claude-skills CLAUDE.md is an instructions file published in the GitHub repository sam-dumont/claude-skills (39 stars, last pushed 5mo ago), licensed MIT. It adds 1,102 tokens to every session, about $0.0055 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 2026-08-30.

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claude-skills: Instructions file for Claude Code