db-migration-safety SKILL.md skillA
db-migration-safety from khaledsaeed18/dotclaude is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add khaledsaeed18/dotclaude/db-migration-safety@git:20260921.4ccfb75Pins git:20260921.4ccfb75 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- khaledsaeed18/dotclaude
- Path
skills/engineering/db-migration-safety/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260921.4ccfb75, committed Sep 21, 2026
- First version recorded
- Jul 4, 2026
- Size
- 4,475 bytes
- Repository stars
- 5
- License
- MIT
Review or write a database schema migration with production safety as the bar, checking locks, table rewrites, backfills, expand-contract deploy order, index creation, and rollback for Postgres, MySQL, and common ORMs. Use when adding or reviewing a migration, dropping or renaming columns, or adding constraints or indexes to large tables.
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
A migration that is correct on an empty dev database can still take a production table offline. Judge every migration by what it does under load on the largest table it touches: what lock it takes, for how long, and what the old application version does while the new schema is live. When any answer is "depends", assume the worst table and the slowest query. ## Step 1: Establish the blast radius - Read the migration and identify every table it touches, then find out (or ask) roughly how large and how hot each one is. A pattern that is fine on 10k rows is an outage on 100M. - Identify the engine and version (Postgres, MySQL 8, SQLite, ...) from config; lock behavior differs materially between them, and between versions. - Identify the deploy model: is the old app version still running while this migration executes (rolling deploy, multiple replicas)? Almost always yes; review under that assumption. ## Step 2: Check the dangerous patterns Flag any of these, with the safe alternative: **Locking and rewrites** …
Read the whole file at its exact version.
How to install
mdr add khaledsaeed18/dotclaude/db-migration-safety@sha256:af006da036ac64a2The line at the top of this page pins the label git:20260921.4ccfb75, 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.
[](https://markdownregistry.com/a/art_qynq4qi7rvybsxn7)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jul 4, 2026 and Sep 21, 2026, about one every 40 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260921.4ccfb75 latest | 2026-09-21 | 4ccfb75 | 4,475 B | A | view · diff |
| git:20260921.b1a4652 | 2026-09-21 | b1a4652 | 4,546 B | A | view · diff |
| git:20260704.3370b83 | 2026-07-04 | 3370b83 | 4,519 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (4475 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
khaledsaeed18/dotclaude · 5 stars · license MIT · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_qynq4qi7rvybsxn7 GET https://markdownregistry.com/api/v1/resolve?ref=khaledsaeed18/dotclaude/db-migration-safety GET https://markdownregistry.com/api/v1/blob/af006da036ac64a2f12af312a656d9845372d90b553ff7861220484a427b28ca
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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