Writing and work
Build Notes.
What I've built for real businesses, including what didn't work, and the things I'm building now.
Build Notes 03Three AI models, one brief: what each build actually costFable 5.1, GPT-5.6 Sol and Gemini 3.8 Flash each built the same site from the same CV. The runs cost $23.57, $10.20 and $1.48. The harness still decides.3 Sept 2026 · 4 minRead it →
Build Notes 02Language models reason. Code calculates. The distinction that saves youA CFO's spreadsheet added up perfectly and answered the wrong question. The rule that prevents it, and the harness that makes any model worth using.26 Aug 2026 · 5 minRead it →
Build Notes 01In a room of 2,000 people, one is building with AIEighteen in a hundred use AI. Three of those pay. Eight of those build. That is one builder in every 2,000 people, and that is where the leverage sits.15 Aug 2026 · 6 minRead it →Newsletter
Get Build Notes by email
A few emails a month.