I'd recommend folks check `.rspec` in -- it's intended for shared project settings.  For personal project settings, there's [`.rspec-local`](https://github.com/rspec/rspec-core/blob/221a1bb264c9c359d881014e06c8dbdfb1a61386/lib/rspec/core/configuration_options.rb#L159-L161), which is intended to be git-ignored, or `~/.rspec`, which is personal cross-project settings.