What is skills CLAUDE.md?

Repository instructions for the ghost-skills collection, which publishes reusable agent skills. They define skill categories, governance rules, documentation requirements, and how unfinished skills are kept separate from published ones.

Use them when adding, organizing, documenting, promoting, or reviewing skills in the repository, especially data-engineering, productivity, and setup skills.

They help maintain a consistent, reviewable collection of skills. They also prevent draft skills from being published accidentally or documented incompletely.

How ghostinthedata-info/skills configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to ghostinthedata-info/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/ghostinthedata-info/skills/main/CLAUDE.md

Clone the repo

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

Your own site

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

Per session 403 This file is loaded in full into every session.

When invoked 403 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	$0.00403	$0.00403
Opus 5.5	$0.00161	$0.00161
Sonnet 5.5	$0.00081	$0.00081
Haiku 4.5	$0.00040	$0.00040

Measured 2mo ago against content hash bb6d33d42b2c, 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 · 40 lines

What it actually says

Governance

This is the publisher repo for the ghost-skills pack. Skills are organized into bucket folders under skills/:

data-engineering/ — the published data-engineering pack (profiling, requirements, modeling, keys, SCDs, testing, performance, incidents, pipelines, data products, security classification)
setup/ — one-time per-repo configuration (setup-ghost-skills)
productivity/ — general-purpose authoring/comms skills
in-progress/ — drafts not yet promoted; not published

Every skill in data-engineering/, productivity/, or setup/ must have a reference in the top-level README.md and an entry in .claude-plugin/plugin.json. Skills in in-progress/ must not appear in either until promoted out of that folder.

Each skill entry in the top-level README.md must link the skill name to its SKILL.md.

Skills are purely methodological — no vendor-specific SQL or product features in the core buckets. Cross-skill references must be soft references (see CONTEXT.md for the definition); every skill must remain self-sufficient for its core decision. The setup-pointer convention is recorded in docs/adr/0001-explicit-setup-pointer-only-for-hard-dependencies.md.

Agent skills

Issue tracker

Issues live as local markdown files under .scratch/. See docs/agents/issue-tracker.md.

Triage labels

Default label vocabulary (needs-triage, needs-info, ready-for-agent, ready-for-human, wontfix). See docs/agents/triage-labels.md.

Domain docs

Single-context repo — one CONTEXT.md and docs/adr/ at the root. See docs/agents/domain.md.

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.

2mo ago First seen · 40 lines · 403 tokens per session scan A bb6d33d42b2c

Subscribe to this mod's changes

skills CLAUDE.md is an instructions file published in the GitHub repository ghostinthedata-info/skills (5 stars, last pushed 4mo ago), licensed MIT. It adds 403 tokens to every session, about $0.0016 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.

skills CLAUDE.md next to 6 instructions from other repositories
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skills CLAUDE.mdghostinthedata-info/skills	Instructions file	5	4mo ago	MIT	A	403	Claude Code
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skills: Instructions file for Claude Code