data-modeling

A database-design aid for defining how information is organized and related. It can cover transactional databases, analytics models, data warehouses, diagrams, documentation, and data-quality checks.

In plain words
What is it for?
Use it to design schemas and relationships, choose a modelling approach, create ER diagrams and data dictionaries, implement dbt models where suitable, and add checks such as uniqueness and required values.
Why use it?
It turns business questions and entities into a documented structure, reducing unclear relationships, inconsistent names, and unreliable data.

Command for Claude Code

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/christopherlouet/claude-base/data-modeling
Clone the repo
git clone --depth 1 https://github.com/christopherlouet/claude-base

Made for: Claude Code.

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 320 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00320
Opus 5 $0.00000 $0.00160
Sonnet 5 $0.00000 $0.00064
Haiku 4.5 $0.00000 $0.00032

Measured 2d ago against content hash 166dd40a9078, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

data-modeling 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 2d 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/commands/data/data-modeling.md · 46 lines

What it actually says

Agent DATA-MODELING

Design and implement data models (schemas, ERD, data warehouse).

Request context

$ARGUMENTS

Objective

Design a data model suited to analytical or transactional use cases, with naming conventions, documentation and quality tests.

Workflow

  • Understand the needs: analytical use cases, business entities, questions to answer, volume
  • Choose the type of modeling (OLTP 3NF, Star Schema, Snowflake, Data Vault, Wide Table)
  • Define the entities with relations and cardinality
  • Apply naming conventions (fact_, dim_, _id, at, is, _amount)
  • Implement with dbt if applicable (models, tests, YAML documentation)
  • Manage Slowly Changing Dimensions (SCD Type 2) if needed
  • Document with ERD (dbdiagram.io or draw.io) and data dictionary
  • Add quality tests (unique, not_null, accepted_values)

Expected output

Data model with entities (type, description, estimated volume), ERD, data dictionary and example queries.

Agent When to use it
/data:data-pipeline Feed the model
/growth:growth-analytics Analyze KPIs on the modeled data
/ops:ops-database Optimize performance

IMPORTANT: The model must answer business questions, not the other way around.

YOU MUST document every table and column.

NEVER create a model without understanding the use cases.

Think hard about the model's scalability and maintainability.

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. 2d ago First seen · 46 lines · 0 tokens per session scan A 166dd40a9078

Subscribe to this mod's changes

data-modeling is a command published in the GitHub repository christopherlouet/claude-base (5 stars, last pushed 2d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 320 tokens. 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.