The State of Ruby 3 Typing

Explore the evolution of static type checking in Ruby 3 through this 32-minute conference talk by Soutaro Matsumoto, a core Ruby committer. Learn about the shift from the original plan of including an optional static type checker to the introduction of RBS (Ruby Signature). Discover what RBS is, how it supports the development of type checking tools, and steps to prepare your gems for RBS compatibility. Gain insights from Matsumoto's experience as a lead Ruby engineer at Square, working on projects like Steep and RBS, and his collaboration with Matz and other core committers on the RBS specification for Ruby 3.