What is database-designer?

A coding agent for designing database structures, including tables, relationships, and rules for organizing data.

Use it to design database schemas, model relationships between data, normalize tables, and improve data structures.

It helps create data models that represent the application's information clearly and avoid unnecessary duplication.

database-designer — Agent for Claude Code by TheBushidoCollective/han

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.

Clone the repo

git clone --depth 1 https://github.com/TheBushidoCollective/han

Made for: Claude Code.

Or install database-engineering, the plugin that ships this one along with the rest of its 3 agents.

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/agents/thebushidocollective/han/database-designer/github.svg)](https://agentmods.dev/agents/thebushidocollective/han/database-designer)

Your own site

<a href="https://agentmods.dev/agents/thebushidocollective/han/database-designer"><img src="https://agentmods.dev/badge/agents/thebushidocollective/han/database-designer/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/agents/thebushidocollective/han/database-designer"><img src="https://agentmods.dev/badge/agents/thebushidocollective/han/database-designer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 35 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 3,993 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00035	$0.03993
Opus 5.5	$0.00014	$0.01597
Sonnet 5.5	$0.00007	$0.00799
Haiku 4.5	$0.00003	$0.00399

Measured 2mo ago against content hash ed28851ec9b3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

database-designer 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.

plugins/disciplines/database-engineering/agents/database-designer.md · 839 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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.

2mo ago First seen · 839 lines · 35 tokens per session scan A ed28851ec9b3

Subscribe to this mod's changes

database-designer is an agent published in the GitHub repository TheBushidoCollective/han (200 stars, last pushed yesterday), with no licence file. It adds 35 tokens to every session and 3,993 once invoked, about $0.0001 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 2026-09-03.

Databases

database-designer next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
database-designerTheBushidoCollective/han	Agent	200	yesterday	none	A	35	Claude Code
MS-SQL Database Administratorgithub/awesome-copilot	Agent	41k	today	MIT	A	18	Claude Code
core-data-auditorCharlesWiltgen/Axiom	Agent	1.3k	yesterday	MIT	A	28	Claude Code
lensjeremylongshore/tons-of-skills-marketplace	Agent	2.9k	today	MIT	A	53	Claude Code
ecto-schema-designeroliver-kriska/claude-elixir-phoenix	Agent	574	yesterday	MIT	A	30	Claude Code
django-migrations-specialistAratKruglik/claude-sdlc	Agent	55	11d ago	MIT	A	85	Claude Code
yd-oracle-expertLeeYudok/agents-scaffold	Agent	38	yesterday	MIT	A	100	Claude Code