A tool for creating Chen-model entity-relationship diagrams from SQL table definitions or DBML. An entity-relationship diagram shows data entities, their fields, and how they relate.

Use it to generate, clean up, rearrange, and export database diagrams as Drawio, SVG, PNG, JSON, or HTML files.

It turns database structure into a visual model that is easier to inspect and rearrange. The description does not provide further details about its exact behavior.

sql2er — Skill for Codex by ystemsrx/sql_to

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.

Any agent

npx skills add ystemsrx/sql_to_ER --skill sql2er

Clone the repo

git clone --depth 1 https://github.com/ystemsrx/sql_to_ER

Made for: Codex.

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/skills/ystemsrx/sql_to_er/sql2er/github.svg)](https://agentmods.dev/skills/ystemsrx/sql_to_er/sql2er)

Your own site

<a href="https://agentmods.dev/skills/ystemsrx/sql_to_er/sql2er"><img src="https://agentmods.dev/badge/skills/ystemsrx/sql_to_er/sql2er/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/skills/ystemsrx/sql_to_er/sql2er"><img src="https://agentmods.dev/badge/skills/ystemsrx/sql_to_er/sql2er.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 63 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,052 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	$0.00063	$0.01052
Opus 5.5	$0.00025	$0.00421
Sonnet 5.5	$0.00013	$0.00210
Haiku 4.5	$0.00006	$0.00105

Measured 1mo ago against content hash 0a2389f5f6c2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

sql2er 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 1mo ago.

The scan reads SKILL.md. This mod also ships 11 executable files (scripts/build.mjs, scripts/engine/adapter.ts, scripts/engine/cli.ts, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/sql2er/SKILL.md · 87 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

What ships with it

15 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

1mo ago Changed · +1 lines 0a2389f5f6c2
1mo ago First seen · 86 lines · 63 tokens per session scan A be5ed347175d

Subscribe to this mod's changes

sql2er is a skill published in the GitHub repository ystemsrx/sql_to_ER (191 stars, last pushed 17d ago), licensed AGPL-3.0. It adds 63 tokens to every session and 1,052 once invoked, about $0.0003 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.

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