database-erd SKILL.md skillA
database-erd from nerds-odd-e/doughnut is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add nerds-odd-e/doughnut/database-erd@git:20260826.0b913a6Pins git:20260826.0b913a6 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- nerds-odd-e/doughnut
- Path
.agents/skills/database-erd/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260826.0b913a6, committed Aug 26, 2026
- First version recorded
- Jul 26, 2026
- Size
- 3,016 bytes
- Repository stars
- 50
- License
- MIT
Regenerate docs/database-erd.md from MySQL information_schema (Mermaid ERD: foreign keys and key columns). Use after Flyway schema changes, new migrations, or when the diagram is stale. Triggers on: database ERD, database-erd.md, export_database_erd, schema diagram, ER diagram after migration.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
<objective> Regenerate `docs/database-erd.md` from the live MySQL catalog so the Mermaid ERD matches the current migrated schema. Purpose: Keep the schema diagram accurate after Flyway migrations — never hand-edit the Mermaid block. Output: Updated `docs/database-erd.md` + summary ending with `## ERD EXPORTED`. </objective> <context> `docs/database-erd.md` is generated from MySQL `information_schema` (foreign keys and PK/UK/FK columns). **Do not hand-edit the Mermaid block**; re-run the exporter after schema changes. **Run when:** - A new or changed Flyway migration alters tables, columns, or constraints - The ERD needs to match the current migrated schema **Git does not use the Nix prefix.** All other repo tooling does: `CURSOR_DEV=true nix develop -c …` **Implementation:** - Script: `scripts/export_database_erd.py` - Output: `docs/database-erd.md` - Omits **`flyway_schema_history`** from the diagram **Overrides (optional):** | Variable | Default | |----------|---------| | `DONUT_ERD_SCHEMA` | (auto: development → test → e2e) | | `DONUT_ERD_MYSQL_HOST` | `127.0.0.1` | | `DONUT_ERD_MYSQL_PORT` | `3309` | | `DONUT_ERD_MYSQL_USER` | `doughnut` | …
Read the whole file at its exact version.
How to install
mdr add nerds-odd-e/doughnut/database-erd@sha256:1a4d0a10aee3699dThe line at the top of this page pins the label git:20260826.0b913a6, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_6ahi2m3nxn7n6hnw)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jul 26, 2026 and Aug 26, 2026, about one every 31 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260826.0b913a6 latest | 2026-08-26 | 0b913a6 | 3,016 B | A | view · diff |
| git:20260726.72e37c1 | 2026-07-26 | 72e37c1 | 3,040 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3016 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
nerds-odd-e/doughnut · 50 stars · license MIT · pushed 2026-11-01 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6ahi2m3nxn7n6hnw GET https://markdownregistry.com/api/v1/resolve?ref=nerds-odd-e/doughnut/database-erd GET https://markdownregistry.com/api/v1/blob/1a4d0a10aee3699d2313966f443642643b6c07da02b5502ae6885480b27cce93
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.