Field notes

Real riding sessions, recorded on phones and cameras, and what the numbers showed.

  • Pinned

    Sep 7, 2026

    The Miracle Happened!

    One phone on the handlebars, 21 minutes of raw sensor data, and no list of drills. Claude Code drew every drill, found every brake rep and scored them.

  • Sep 29, 2026

    Countersteer, caught on two cameras

    A handlebar camera and a frame camera recorded together. Subtract one from the other and the rider's steering is what remains. At turn-in the bars go the wrong way first.