ruby-on-railslisted

# Ruby on Rails Best Practices Full-stack Rails 8.1 guide organized as modular rules. Covers MVC core patterns, Active Record, components (jobs, mailer, cable, storage), security, testing, performance, deployment, and debugging. For core Ruby language topics (blocks/procs/lambdas, modules/mixins, metaprogramming, Bundler/gems, RSpec/Minitest, RuboCop) that aren't Rails-specific, load the sibling `ruby` skill instead. ## ROUTING: Which rule file to load **IF working with models, database queries, associations, validations, or migrations:** → Read `rules/core-active-record.md` **IF working with routes, controllers, params, sessions, cookies, or filters:** → Read `rules/core-routing-and-controllers.md` **IF working with views, layouts, partials, ERB templates, or form helpers:** → Read `rules/core-views-and-forms.md` **IF working with background jobs, emails, or WebSocket channels:** → Read `rules/component-jobs-mailer-cable.md` **IF working with file uploads or cloud storage:** → Read `rules/component-active-storage.md` **IF dealing with security concerns (auth, CSRF, XSS, SQL injection, secrets):** → Read `rules/security-best-practices.md` **IF writing or fixing tests:** → Read `rules/testing-patterns.md` **IF optimizing performance or configuring for production:** → Read `rules/perf-caching-and-deployment.md` **IF debugging an error or unexpected behavior:** → Read `rules/debug-tools.md` **IF building a Rails engine, a custom generator, or Rack middleware:** → Re