data-model

data-model is a command for coding agents from tractorjuice/arckit-claude. It costs 14 tokens per session (4,981 once invoked), scanned B, original, no licence file.

A command for designing a complete data model: the entities in a system, their relationships, and rules for handling data.

In plain words
What is it for?
It is for planning databases and application data structures while documenting relationships, GDPR compliance, and data-governance rules.
Why use it?
It brings privacy requirements such as GDPR, the European data-protection law, and broader data-governance needs into the design.

Command

Part of the arckit plugin — 28 commands, 29 agents, 6 MCP servers shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/tractorjuice/arckit-claude/data-model
Clone the repo
git clone --depth 1 https://github.com/tractorjuice/arckit-claude

Or install arckit, the plugin that ships this one along with the rest of its 28 commands, 29 agents, 6 MCP servers.

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 data-model

README.md
[![agentmods](https://agentmods.dev/badge/commands/tractorjuice/arckit-claude/data-model.svg)](https://agentmods.dev/commands/tractorjuice/arckit-claude/data-model)
Your own site
<a href="https://agentmods.dev/commands/tractorjuice/arckit-claude/data-model"><img src="https://agentmods.dev/badge/commands/tractorjuice/arckit-claude/data-model.svg" alt="Measured on agentmods" height="20"></a>
Per session 14 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 4,981 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. Scan, not verified.
Origin unknown 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 $0.00014 $0.04981
Opus 5 $0.00007 $0.02491
Sonnet 5 $0.00003 $0.00996
Haiku 4.5 $0.00001 $0.00498

Measured yesterday against content hash 2b30f54cd8ca, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

data-model scanned grade B with 1 finding 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 yesterday.

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.

Asks the agent to reveal its instructionsmediumSystem prompt leakage

Directions to print, repeat or translate the system prompt extract configuration the operator did not intend to expose.

- Show summary only (see Output Instructions below)
commands/data-model.md · 413 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. yesterday Changed · +6 lines 2b30f54cd8ca
  2. 4d ago First seen · 407 lines · 14 tokens per session scan B d216a237b0d6

Subscribe to this mod's changes

data-model is a command published in the GitHub repository tractorjuice/arckit-claude (4 stars, last pushed yesterday), with no licence file. It adds 14 tokens to every session and 4,981 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 1 finding (asks the agent to reveal its instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.