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database-migrations SKILL.md skillA

database-migrations from hashgraph-online/awesome-codex-plugins is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add hashgraph-online/awesome-codex-plugins/database-migrations@git:20260512.6523792

Pins git:20260512.6523792 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: hashgraph-online/awesome-codex-plugins
Path: plugins/Colin4k1024/tsp/skills/database-migrations/SKILL.md
Versions recorded: 1
Latest version: git:20260512.6523792, committed May 12, 2026
Size: 11,839 bytes
Repository stars: 1,501
License: Apache-2.0

Database migration best practices for schema changes, data migrations, rollbacks, and zero-downtime deployments across PostgreSQL, MySQL, and common ORMs (Prisma, Drizzle, Kysely, Django, TypeORM, golang-migrate).

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 Migration Patterns

Safe, reversible database schema changes for production systems.

## When to Activate

- Creating or altering database tables
- Adding/removing columns or indexes
- Running data migrations (backfill, transform)
- Planning zero-downtime schema changes
- Setting up migration tooling for a new project

## Core Principles

1. **Every change is a migration** — never alter production databases manually
2. **Migrations are forward-only in production** — rollbacks use new forward migrations
3. **Schema and data migrations are separate** — never mix DDL and DML in one migration
4. **Test migrations against production-sized data** — a migration that works on 100 rows may lock on 10M
5. **Migrations are immutable once deployed** — never edit a migration that has run in production

## Migration Safety Checklist

Before applying any migration:

- [ ] Migration has both UP and DOWN (or is explicitly marked irreversible)
- [ ] No full table locks on large tables (use concurrent operations)
- [ ] New columns have defaults or are nullable (never add NOT NULL without default)
- [ ] Indexes created concurrently (not inline with CREATE TABLE for existing tables)
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add hashgraph-online/awesome-codex-plugins/database-migrations@sha256:645290c5763d3164

The line at the top of this page pins the label git:20260512.6523792, 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_45hqlpylidham6j5.svg)](https://markdownregistry.com/a/art_45hqlpylidham6j5)

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

Versions

The registry has recorded 1 version of this file, committed on May 12, 2026.

version	committed	commit	size	audit
git:20260512.6523792 latest	2026-05-12	6523792	11,839 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 (11839 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

hashgraph-online/awesome-codex-plugins · 1,501 stars · license Apache-2.0 · pushed 2026-11-03 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_45hqlpylidham6j5
GET https://markdownregistry.com/api/v1/resolve?ref=hashgraph-online/awesome-codex-plugins/database-migrations
GET https://markdownregistry.com/api/v1/blob/645290c5763d31649bd6c071245b53198cdaf4438d9aa091b6ee6bd3ab085fea

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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