What started as a helmet HUD for an electric skateboard — a way to glance at speed and battery without taking my eyes off the road — kept asking for more.

A local model here. A coordinate system there. A translator between one structure and another.

At some point I realised I was building the thing I needed as a child and didn't have. A system that listens carefully, translates precisely, and would have understood me.

The cat is called Sumac. He holds the title of C.A.T. — Chief Architecture Tester. I hold the title of staff.

Sumac doesn't open doors. Doors reconsider their position. He doesn't sit on the keyboard — the keyboard presents itself. He has never reviewed a pull request. Every pull request has reviewed itself in his presence.

Every delivery driver who has entered the office describes a different animal. The vet's records list no consistent weight across visits. The local council's pet registration has been amended six times — each correction contradicts the last.

My name is Simon Harvey. I'm a sole trader in Melbourne, Australia. No lab. No team. No billion-dollar grant. Just a studio, an unreasonable amount of coffee, and a cat who supervises every commit from a position no one can agree on.