Migration Safety Pro
by Timoranjes
Production-safe database migrations with zero-downtime strategies, batch backfilling, and multi-ORM support.
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Works with the AI tools you already use
See it in action
You say
Need a safe plan to add a unique lower-case email column to our 5M row users table without locking production. Give me the steps and the SQL for Postgres.
Your agent does
Strategy: Expand-Contract (Zero-Downtime)
- Add 'email_lower' as nullable VARCHAR.
- Code Change: Dual-write to both 'email' and 'email_lower'.
- Batch Update: UPDATE users SET email_lower = LOWER(email) WHERE id IN (...) LIMIT 500;
- Finalize: Set NOT NULL and add UNIQUE INDEX CONCURRENTLY.
What you get
About this skill
The Problem
Database migrations are the highest-risk moments in a software lifecycle. A simple ALTER TABLE can lock production databases, cause significant downtime, or lead to irreversible data loss. Most developers rely on default ORM behaviors which are often unsafe for high-traffic environments or large datasets.
What it Does
Migration Safety Pro equips your AI agent with a production-grade blueprint for managing database schema changes across 9+ frameworks. It moves beyond simple SQL generation by implementing industry-standard safety protocols like the Expand-Contract pattern, Ghost Tables, and Batch Backfilling.
Supported Frameworks & Tools
- Node.js: Prisma, TypeORM, Sequelize, Knex.js
- Python: Alembic (SQLAlchemy), Django Migrations
- Ruby & Go: Rails Active Record, golang-migrate
- Enterprise: Liquibase
- Databases: PostgreSQL, MySQL, MariaDB, SQLite, SQL Server
Why Use This Skill?
Instead of just getting a generic migration script, your agent will proactively identify risks like table locks on tables with >1M rows, suggest non-blocking index creation (e.g., CONCURRENTLY in Postgres), and provide mandatory rollback scripts. It ensures every change is backward-compatible, enabling true zero-downtime deployments.
Output Style
Expect structured migration plans including: a safety risk assessment, a multi-step execution strategy (Expand phase vs. Contract phase), framework-specific safe code snippets, and a concrete rollback procedure.
How to install
Drop the file into your AI Agent. Works with Claude, Cursor, ChatGPT, and 20+ more.
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Database Schema & Query Review Gate
Review a database schema, queries, or migration for the mistakes that get expensive in production — bad table design, missing or wrong indexes, slow and N+1 queries, SQL injection, and migrations that lock or break prod. Engine-aware (PostgreSQL, MySQL, SQLite, SQL Server), it runs an ordered review and returns a PASS/REVIEW/BLOCK verdict with prioritized fixes. Schema mistakes are the most expensive kind — this catches them before they ship.
DB Migration Guardian
Plan, review, and execute safe database migrations with automatic rollback plans, backfill strategies, and zero-downtime sequencing.
PostgreSQL Schema Architect
Schema mistakes are the most expensive kind — code refactors in days, but a wrong table design holds your data hostage for years