migration SKILL.md skillA

migration from alexwaha/agentry is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add alexwaha/agentry/migration@git:20261014.88e2c2f

Pins git:20261014.88e2c2f in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: alexwaha/agentry
Path: plugin/skills/migration/SKILL.md
Versions recorded: 1
Latest version: git:20261014.88e2c2f, committed Oct 14, 2026
Size: 4,088 bytes
Repository stars: 3
License: MIT

Create safe, reversible database migrations with proper column types, indexes, foreign keys, and cascade updates to model/factory/resource. Use when a task adds/renames/drops a column or table, adds an index or foreign key, or when a feature-scaffold needs its schema step done in isolation.

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

# Migration

Create database migrations safely: never edit an existing migration, always
create a new one, and keep every schema change reversible. Concrete migration
tool (`{{MIGRATION_TOOL}}`) and database engine (`{{DEFAULT_DB}}`) live in
`.agentry/project/stack.md`.

## Steps

1. **Classify the change.** New table, add column(s), add index, add foreign
   key, add unique constraint, modify column, rename, or destructive drop.
   Rename and destructive drops need explicit User approval before proceeding -
   see the classification table in `references/migration-examples.md`.
2. **Check existing migration state.** Run `<migration tool> status` to see
   applied/pending migrations. Glob `**/migrations/*_create_<table>_table.*`
   and `**/migrations/*_<table>_*.*` so you don't duplicate columns or indexes
   already defined for the target table.
3. **Generate the migration file via the framework CLI.** Never hand-create
   the filename. Name it per convention: `create_<table>_table`,
   `add_<col>_to_<table>_table`, `add_index_to_<table>_table`,
   `add_<ref>_fk_to_<table>_table`, `modify_<col>_in_<table>_table`,
   `rename_<old>_to_<new>_in_<table>_table`, or
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add alexwaha/agentry/migration@sha256:4d3bb4b026a96812

The line at the top of this page pins the label git:20261014.88e2c2f, 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_q3qjhpbd4tx2wy34.svg)](https://markdownregistry.com/a/art_q3qjhpbd4tx2wy34)

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

Versions

The registry has recorded 1 version of this file, committed on Oct 14, 2026.

version	committed	commit	size	audit
git:20261014.88e2c2f latest	2026-10-14	88e2c2f	4,088 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 (4088 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

alexwaha/agentry · 3 stars · license MIT · pushed 2026-10-29 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_q3qjhpbd4tx2wy34
GET https://markdownregistry.com/api/v1/resolve?ref=alexwaha/agentry/migration
GET https://markdownregistry.com/api/v1/blob/4d3bb4b026a96812ef0b4643cd14f24a01304759620c3344f4146842e1b3e031

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.