← Field Notes

Sept 22, 2026

The model can change. Your Yu stays yours.

The technology underneath is expected to move. You are not.

The artificial intelligence underneath your assistant will change. Better models will arrive. Providers will change. New tools will become possible. That is expected. Your Yu is built around the part of the system that should not have to start over every time the technology does.

You.

Your assistant arrives capable. What it carries is what you decide to build.