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