Home / fabioc-aloha / alex_skill_mall · GitHub

database-design SKILL.md skillA

database-design from fabioc-aloha/alex_skill_mall is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add fabioc-aloha/alex_skill_mall/database-design@git:20260728.80a7ab6

Pins git:20260728.80a7ab6 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
fabioc-aloha/alex_skill_mall
Path
plugins/data-analytics/database-design/skills/database-design/SKILL.md
Versions recorded
1
Latest version
git:20260728.80a7ab6, committed Jul 28, 2026
Size
10,524 bytes
Repository stars
5
License
MIT

Schema design, normalization, query optimization, and data modeling patterns.

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 Skill

> Model data to match access patterns. Normalize for integrity, denormalize for performance.

---

## Choosing a Database

### Decision Matrix

| Factor | SQL (Relational) | NoSQL (Document) | Key-Value | Graph |
|--------|------------------|------------------|-----------|-------|
| **Schema** | Fixed, strict | Flexible | None | Nodes/edges |
| **Transactions** | ACID built-in | Eventually consistent (usually) | Limited | Varies |
| **Joins** | Native support | Expensive/manual | N/A | Native (relationships) |
| **Scale** | Vertical → Horizontal | Horizontal native | Horizontal native | Specialized |
| **Best for** | Structured data, complex queries | Rapid iteration, varied shape | Cache, sessions | Relationships |

### Common Choices (2026)

| Database | Type | Best For |
|----------|------|----------|
| **PostgreSQL** | Relational | General purpose, full-featured |
| **SQLite** | Relational | Embedded, serverless |
| **MongoDB** | Document | Rapid prototyping, flexible schema |
| **Redis** | Key-Value | Caching, sessions, pub/sub |
| **Cosmos DB** | Multi-model | Azure-native, global distribution |
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add fabioc-aloha/alex_skill_mall/database-design@sha256:cb74d4d26c6651ec

The line at the top of this page pins the label git:20260728.80a7ab6, 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 badge

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

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

Versions

The registry has recorded 1 version of this file, committed on Jul 28, 2026.

versioncommittedcommitsizeaudit
git:20260728.80a7ab6 latest2026-07-28 80a7ab6 10,524 BA 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 (10524 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

fabioc-aloha/alex_skill_mall · 5 stars · license MIT · pushed 2026-11-06 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_qtnapdzzgndhgxla
GET https://markdownregistry.com/api/v1/resolve?ref=fabioc-aloha/alex_skill_mall/database-design
GET https://markdownregistry.com/api/v1/blob/cb74d4d26c6651ec53e0264f56dbb554140ca915037feb717dced7dd041a073e

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.

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