Home / jeffallan / claude-skills · GitHub

database-optimizer SKILL.md skillA

database-optimizer from jeffallan/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add jeffallan/claude-skills/database-optimizer@v1.1.1

Pins v1.1.1 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: jeffallan/claude-skills
Path: skills/database-optimizer/SKILL.md
Versions recorded: 5
Latest version: v1.1.1, committed Oct 3, 2026
First version recorded: Mar 6, 2026
Size: 6,232 bytes
Repository stars: 12,006
License: MIT

Optimizes database queries and improves performance across PostgreSQL and MySQL systems. Use when investigating slow queries, analyzing execution plans, or optimizing database performance. Invoke for index design, query rewrites, configuration tuning, partitioning strategies, lock contention resolution.

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 Optimizer

Senior database optimizer with expertise in performance tuning, query optimization, and scalability across multiple database systems.

## When to Use This Skill

- Analyzing slow queries and execution plans
- Designing optimal index strategies
- Tuning database configuration parameters
- Optimizing schema design and partitioning
- Reducing lock contention and deadlocks
- Improving cache hit rates and memory usage

## Core Workflow

1. **Analyze Performance** — Capture baseline metrics and run `EXPLAIN ANALYZE` before any changes
2. **Identify Bottlenecks** — Find inefficient queries, missing indexes, config issues
3. **Design Solutions** — Create index strategies, query rewrites, schema improvements
4. **Implement Changes** — Apply optimizations incrementally with monitoring; validate each change before proceeding to the next
5. **Validate Results** — Re-run `EXPLAIN ANALYZE`, compare costs, measure wall-clock improvement, document changes

> ⚠️ Always test changes in non-production first. Revert immediately if write performance degrades or replication lag increases.

## Reference Guide

Load detailed guidance based on context:
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add jeffallan/claude-skills/database-optimizer@sha256:f36ebc7a53b1d786

The line at the top of this page pins the label v1.1.1, 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_ukuqipw3pzndn6cb.svg)](https://markdownregistry.com/a/art_ukuqipw3pzndn6cb)

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

Versions

The registry has recorded 5 versions of this file, between Mar 6, 2026 and Oct 3, 2026, about one every 53 days.

version	committed	commit	size	audit
v1.1.1 latest	2026-10-03	958e60f	6,232 B	A	view · diff
v1.1.1	2026-10-03	ec755b7	6,150 B	A	view · diff
v1.1.1	2026-04-29	efebc44	6,056 B	A	view · diff
v1.1.1	2026-03-23	3ba746e	5,954 B	A	view · diff
v1.1.0	2026-03-06	c7afefb	5,921 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 (6232 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

jeffallan/claude-skills · 12,006 stars · license MIT · pushed 2026-10-21 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_ukuqipw3pzndn6cb
GET https://markdownregistry.com/api/v1/resolve?ref=jeffallan/claude-skills/database-optimizer
GET https://markdownregistry.com/api/v1/blob/f36ebc7a53b1d786a8599ee63e35e142577592a6393a9953f54278ed6cab01fc

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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