What if trying a Ruby gem was as easy as opening a web page—no local setup, no bundle install, no version headaches? TutorialKit.rb enables interactive, runnable tutorials for Ruby gems directly in the browser by combining Ruby on WebAssembly with an in-browser development runtime.
This talk presents the grant-funded evolution of the project: TutorialKit.rb was awarded a Ruby Association Grant in 2025, and the work from that grant is the core of what I’ll share at RubyKaigi 2026.
