Build log
The build, in public. What I tried, what broke, and what I changed because of it.
Now building
Doch: Brief it in English, it calls in German
I've lived in Berlin for ten years and I still put off phone calls in German. So I'm building Doch, an AI that makes them for you: you brief it in English, it calls in German, checks with you when something comes up, and tells you what was agreed. It's named after what Germans say when they mean "on the contrary". "I can't make this call in German." Doch.
30 Oct 2026
Where people hang up on an AI caller, whether a new opening helped, and what two voice assistants did differently.
21 Oct 2026
Teal for the business on the line, coral for Doch. I built it in one morning with Claude, from tokens to components to code, and tested it on the same three screens with three token sets.
14 Oct 2026
A week after the clickable prototype, Doch became a working app. In the demo it calls a property manager in German with live English captions, shows me its plan first, and asks me when it doesn't know. The prototype was built in Claude.
7 Oct 2026
Why I'm building Doch, an AI that makes German phone calls for you. Before any code I wrote an eval set of 41 cases. The first real test call broke three of its rules, and each one became a guardrail.