Ryan Foo

I’m a game designer. I build consumer AI products and the harnesses behind them. My work spans AI companions, voice interactions, and harness engineering: shaping the context, memory, and behavior around a model.

I co-founded Sonzai Labs, where I worked on Pocket Souls, an AI companion experience, and the Mind Layer, our now open-source memory and personality infrastructure for AI characters and agents.

Before that, I designed game economies at Limit Break, researched and invested at Delphi Digital, and built voice games at Volley (YC W18). I also angel invest, write Metaversus, and publish poems.

View workPoetrySay hi ↗

Start here

a few favorite places to begin

Among Us: A Game Designer’s Perspectivewhy sixty million people a day played a game about lyingOn Masterythe pursuit of excellence and deliberate practicecloser to youon longing and the many forms of closenessThe Mind Layerminds, not brains — where I think AI is going

Elsewhere

public trails and contact points

angel investingearly checks into AI, games, and consumer teams — say himetaversusnewsletter archive on games and technology@ryzemewshort notes and loose observationslinkedinwork history and professional context