migrations-data-model-changes

What problem does it solve?

This Skill standardizes how to change schemas safely, how to backfill data, and how to avoid outages or irreversible migrations in a Django + Postgres application.

Core Features & Use Cases

• Safe schema evolution: add/alter/remove fields, constraints, and indexes with risk-aware plans.
• Idempotent backfills: design and implement resumable data migrations to populate new fields without downtime.
• Rollback & verification: document rollback strategies and verify migrations with clear operational notes.

Quick Start

Begin by outlining the design in 02-design.md, then generate Django migrations and apply them with makemigrations and migrate, followed by a controlled backfill plan.