claude-code_dual-boot-skill

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.