Build log
Weekly notes from building Doch in public. What I tried, what broke, and what I changed because of it.
26 Oct 2026
Most people hang up on an AI within five seconds
Doch made its first real calls to Berlin businesses. Eight of the nine people who picked up hung up within five seconds of hearing it's an AI, so the opening line is now the thing I'm designing. It also got its own design system, Two Voices.
14 Oct 2026
From prototype to a working app in a week
Doch went from prototype to working app. A demo call reports a broken window to a property manager in German, with live English captions, a plan you check first, and a report at the end.
7 Oct 2026
Designing an AI agent is mostly designing what it says no to
Why I'm building Doch, an AI that makes German phone calls for you. Its first real test call broke three of its own rules, which taught me that designing an agent is mostly designing what it says no to.