axiom-database-migration

What problem does it solve?

Safe database schema evolution is critical for production apps. This Skill provides tested patterns and guidance to perform additive, idempotent migrations without risking data loss across SQLite/GRDB/SwiftData environments.

Core Features & Use Cases

• Additive migrations: safely add columns or tables without dropping data.
• Immutable migrations: treat shipped migrations as final; plan new migrations for changes.
• Validation & testing: verify upgrade paths from older versions to newer ones, including data preservation.
• Real-world guidance: handle NOT NULL constraints, foreign keys, and type changes with safe strategies.

Quick Start

Start by inspecting existing migrations, and plan a new migration that adds a nullable column, then backfill as a separate step. For example, ask the model: "How do I add a nullable column to users without disturbing existing rows?"