mir-backend-ruby-rails

Make It Right (Rails module). Ruby on Rails 7+ specific reliability augmentation. Use alongside mir-backend and mir-backend-ruby when the target stack is Rails — carries the mechanical footguns the framework-agnostic skills deliberately omit: ActiveRecord N+1 and eager-loading strategies, strong parameters and mass-assignment safety, callback side-effect timing (after_commit vs after_save), transaction semantics and nested transactions, migration safety on populated tables (the #1 Rails production incident class), and connection pool sizing tied to Puma threads. TRIGGER only when the Ruby backend is Rails — building, reviewing, or debugging a Rails controller, model, concern, migration, or background job that uses ActiveRecord. Always loads TOGETHER WITH mir-backend (the gates) and mir-backend-ruby (YARV runtime: GVL, Puma fork-safety, CoW memory, job hygiene); this module only adds Rails/ActiveRecord library mechanics. SKIP for Sinatra, Hanami, pure Rack apps, or non-Ruby runtimes.