ombulabs

Analyzes Rails applications and generates comprehensive upgrade reports with breaking changes, deprecations, and step-by-step migration guides for Rails 2.3 through 8.1. Use when upgrading Rails applications, planning multi-hop upgrades, or querying version-specific changes. Based on FastRuby.io methodology and "The Complete Guide to Upgrade Rails" ebook.

Clean up after (or abandon) a Rails upgrade. Drop NextRails.next? and NextRails.current? branches and retire dual-boot scaffolding (Gemfile.next, Gemfile.next.lock, conditional Gemfile groups), keeping either the next or the current version. Trigger when the user says they are done with the upgrade, want to clean up dual-boot, want to drop NextRails branches, want to finish the upgrade, want to abandon or revert the upgrade attempt, want to roll back to the current Rails version, or want to pause this upgrade hop. Based on FastRuby.io's "Finishing an Upgrade" methodology, extended with an abandon/pause path.

Incrementally upgrade Rails `config.load_defaults` by walking through each new_framework_defaults config one at a time. Use this skill whenever the user mentions load_defaults upgrade, new_framework_defaults, framework defaults, or wants to bring their Rails app's default configuration up to match their Rails version. Also trigger when the user mentions a gap between their Rails version and their load_defaults version (e.g., "app is on Rails 7.2 but load_defaults is 6.1"). This skill handles the iterative uncomment-test-commit workflow and the final consolidation into config/application.rb.

Sets up and manages dual-boot Ruby and Rails environments using the next_rails gem. Helps configure Gemfile for running two versions of Rails, Ruby, or any core dependency simultaneously, set up CI for both versions, use NextRails.next? for version-dependent code, and clean up after the upgrade is complete. Based on FastRuby.io methodology and "The Complete Guide to Upgrade Rails" ebook.