What is marketplace CLAUDE.md?

Repository instructions for a marketplace of Claude Code plugins for GreyCat development and local language-model use. They describe how the marketplace registry, skill plugins, and language-server plugins are arranged and packaged.

Use them to develop marketplace plugins, package one or all skills, configure GreyCat language-server support, and check the required project structure and dependencies.

They explain where plugin files belong and which commands create distributable skill packages, reducing mistakes when adding or packaging plugins.

How datathings/marketplace configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to datathings/marketplace. 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/datathings/marketplace/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/datathings/marketplace

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/datathings/marketplace/claude-md/github.svg)](https://agentmods.dev/instructions/datathings/marketplace/claude-md)

Your own site

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

Per session 923 This file is loaded in full into every session.

When invoked 923 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	$0.00923	$0.00923
Opus 5.5	$0.00369	$0.00369
Sonnet 5.5	$0.00185	$0.00185
Haiku 4.5	$0.00092	$0.00092

Measured 12d ago against content hash 75bc76689b51, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

marketplace 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 12d 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 · 111 lines

How it starts

The opening of the file, as written. The whole thing — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Repository Overview

This is the Datathings Marketplace - a Claude Code plugin marketplace providing skills and LSP plugins for GreyCat development and local LLM inference.

Architecture

The marketplace follows a two-level structure:

Marketplace level (.claude-plugin/marketplace.json) - registry of all plugins
Plugin level (plugins/<name>/) - individual skill or LSP plugins

Plugin Types

Skill Plugins (greycat, greycat-c, llamacpp):

skills/<name>/SKILL.md - entry point with YAML frontmatter (name, description)
skills/<name>/references/ - detailed docs loaded on-demand
package.sh - creates .skill distribution (zip with .skill extension)

LSP Plugins (greycat-lsp):

lspServers in plugin.json - LSP server configuration (command, args, transport)
Requires greycat binary in PATH (the server is greycat lsp)

Commands

Package skills

./package.sh                     # Interactive skill selection
./package.sh -a                  # Package all skills to ./skills/
./package.sh greycat             # Package a specific skill by name
./package.sh -s llamacpp         # Same as above (explicit flag)
./package.sh -c -a               # Clean existing before packaging all
./package.sh -o /output/dir -a   # Custom output directory

Update skills (sync with upstream libs)

Maintenance commands live at the marketplace root in .claude/commands/:

/update-greycat          # Sync greycat skill with latest library versions
/update-greycat-c        # Update C SDK documentation
/update-llamacpp         # Sync with upstream llama.cpp release

These are repo maintenance workflows, not distributed with the skills.

Create new skill

.claude/skills/skill-creator/scripts/init_skill.py <skill-name> --path <output-dir>

Bump versions

./bump-version.sh                # Show current versions
./bump-version.sh 1.3.0          # Bump all plugins to 1.3.0

Read the full file on GitHub · 111 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.

12d ago Changed · +8 tokens per session 75bc76689b51
2mo ago First seen · 111 lines · 915 tokens per session scan A 878a530cc320

Subscribe to this mod's changes

marketplace CLAUDE.md is an instructions file published in the GitHub repository datathings/marketplace (11 stars, last pushed 11d ago), licensed Apache-2.0. It adds 923 tokens to every session, about $0.0037 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 2026-08-30.

marketplace CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
marketplace CLAUDE.mddatathings/marketplace	Instructions file	11	11d ago	Apache-2.0	A	923	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

marketplace: Instructions file for Claude Code