Debugging

The agent reported success. The job “completed.” Then the next step in your pipeline received nothing, and you spent an evening chasing the mystery. Here’s the liberating truth most solo builders don’t reach until it costs them: your agent’s failures are almost never dramatic. They’re mechanical, and mechanical means diagnosable. The bug was one missing closing bracket. The fix was reading one number in a log file. There is no genius in it — and that’s exactly the good news. ...

The simulator said it worked. The phone crashed. That gap, between a green test run and a bricked handset, is where on-device software actually gets built. And it’s a gap almost nobody writes about: the people who survive it are too busy shipping to blog, and the people who blog about “I built an AI voice thing” mostly stopped at the demo that only ever ran in the simulator. This is about the specific, physical reasons the simulator lies, and why shipping on real hardware is a different craft than passing tests. ...