Use the railstart gem to scaffold Rails applications, initialize or customize `~/.config/railstart`, run `railstart new`, create and test presets, debug YAML config or post-action behavior, and contribute changes to the gem. Trigger when a task involves Railstart CLI usage, Rails 8 starter app generation, preset authoring, YAML question/post-action configuration, Rails template post-actions, or the gem's CLI/config/generator implementation.
2026-07-11