Home / fabioc-aloha / alex_skill_mall · plugins/data-analytics/database-design/skills/database-design/SKILL.md · GitHub

database-design skillA

database-design is agent-read markdown (skill) from fabioc-aloha/alex_skill_mall: Schema design, normalization, query optimization, and data modeling patterns.

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns 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

Latest version
mdr add fabioc-aloha/alex_skill_mall/database-design@git:20260728.80a7ab6
Exact content
mdr add fabioc-aloha/alex_skill_mall/database-design@sha256:cb74d4d26c6651ec

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

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Versions

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

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, 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 · 4 stars · license MIT · pushed 2026-09-21 · 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 agent 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.

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