Computers changed. Operating systems mostly did not.

Unix was born in a world of one user, one machine, scarce memory and trusted software. Every generation since has extended that model with layers of compatibility, virtualization, containers and abstraction. Those systems became extraordinary; none of them are failures.

They are, however, descendants of ideas from a different era. At some point complexity stops being accidental and becomes architectural. Tirys begins with one question: if we were designing an operating system today, knowing everything we have learned, what would we build? This project is our answer.