The State of Ruby 3 Typing - Soutaro Matsumoto

This talk is about the new feature of Ruby 3 for static type checking. The Ruby committer team had a plan to provide an optional static type checker for Ruby 3, but it is changed. Ruby 3 won't ship with a static type checker, but it will provide a feature called RBS to support type checker developments. In this talk, I will explain what RBS is, how the gem helps type tools developments, and what to do to get your gems ready for RBS. Soutaro Matsumoto Soutaro is a lead Ruby engineer at Square working on Steep, RBS, and static typing. He is a core Ruby committer working with Matz and other core committers on the RBS specification that will ship with Ruby 3.