db-design SKILL.md skillA

db-design from alexwaha/agentry is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add alexwaha/agentry/db-design@git:20261014.88e2c2f

Pins git:20261014.88e2c2f in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: alexwaha/agentry
Path: plugin/skills/db-design/SKILL.md
Versions recorded: 1
Latest version: git:20261014.88e2c2f, committed Oct 14, 2026
Size: 3,657 bytes
Repository stars: 3
License: MIT

Design a complete database schema - entities, relationships, indexes, ER diagram, migration plan, and soft delete strategy - from product requirements and API contracts. Use when a task says design the database/schema, add new tables or columns, plan migrations for a new feature, needs an ER diagram, or when API design surfaces fields that have no backing table yet.

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

# Database Design

Design a complete database schema from product requirements and API
contracts: entity definitions, relationships, indexes, an ER diagram, and a
migration execution plan. Concrete migration CLI commands and column type
conventions live in `.agentry/project/stack.md`.

## Steps

1. **Read inputs.** `docs/product/product-spec.md`, `docs/technical/api-contracts.md`
   (if it exists), `docs/technical/architecture.md` (if it exists). If API
   contracts exist, the schema must support every request/response field
   defined there; otherwise derive entities from the product spec.
2. **Identify all entities and attributes.** For each entity: table name
   (plural, snake_case), all columns with types, nullability, defaults,
   whether it uses soft deletes, whether it uses UUIDs or auto-increment IDs.
   Table shape example: `references/schema-examples.md`.
3. **Define relationships.** Map every relationship: parent, child, type
   (1:1, 1:N, N:N), FK column, `ON DELETE` behavior, and a one-line reason.
   List pivot tables separately with their extra columns.
4. **Design indexes.** Every foreign key, unique constraint, and column used
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add alexwaha/agentry/db-design@sha256:d80c23d4e3c2bacb

The line at the top of this page pins the label git:20261014.88e2c2f, 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.

Badge

[![mdr](https://markdownregistry.com/badge/art_bnfn4jvibt25odja.svg)](https://markdownregistry.com/a/art_bnfn4jvibt25odja)

1 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Oct 14, 2026.

version	committed	commit	size	audit
git:20261014.88e2c2f latest	2026-10-14	88e2c2f	3,657 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (3657 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

GitHub

alexwaha/agentry · 3 stars · license MIT · pushed 2026-10-29 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_bnfn4jvibt25odja
GET https://markdownregistry.com/api/v1/resolve?ref=alexwaha/agentry/db-design
GET https://markdownregistry.com/api/v1/blob/d80c23d4e3c2bacb239c237d182bc51f097b31246a7f5b7cb73b4d43da933cb7

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.