[madsohm]

As part of my PhD I created a CSP implementation in Ruby: https://github.com/omegahm/emit Here I also created a Fiber scheduler, as well as CSP channels and processes.

[brunosutic]

Fiber Scheduler Interface feature was added to Ruby 3.0 in December 2020 https://docs.ruby-lang.org/en/3.0/Fiber/SchedulerInterface.h.... Yet, the latest commit in this repo is 3 years ago.

You probably implemented your own custom scheduler implementation, right?