I work with Ruby mainly.
Recently I work with the type system for Ruby. I'm a maintainer of RBS. I'm responsible for
rbs prototype command.
I'm developping RBS Rails to integrate RBS and Rails.
I also work for OSS Ruby libraries hosted on GitHub. I've sent 800+ pull requests to OSS projects written in Ruby. Bug fixing, suppress warnings, new features, and so on.
If you develop a Ruby application, I guess it includes my code.
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