- ruby the Ruby Spec Suite examples (submodule)
- ruby_specs (file) a whitelist of the Ruby Spec Suite files to be ran
- filters The list of the Ruby Spec Suite examples that are either bugs or unsupported
- opal opal additions/special behaviour in the runtime/corelib
- lib specs for opal lib (parser, lexer, grammar, compiler etc)
- mspec the MSpec library that runs the ruby spec
- mspec-opal Opal specific patches to the MSpec library
- support misc. utilities