Rails Migration & Cascade Skill

Use Case: Creating new database fields via migrations and correctly cascading those changes across the full MVC stack in Ruby on Rails.

DB Adapter Detection (MANDATORY — resolve before applying DB-specific guidance)

When this skill is loaded, immediately determine the database adapter using the following steps in order:

Step 1 — Gemfile/Gemfile.lock (HIGHEST PRIORITY)

Scan Gemfile and Gemfile.lock for DB adapter gems: