Notes from the work.
Field notes, engineering write-ups, and perspective on building AI that ships, written by the people who do it.
Six years, then a dead screen
I watched my net worth on ET Portfolio for six years. Then it shut down overnight. So I rebuilt the part I missed, taking nothing but a public number.
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Transactional mail, marketing blocklist
Every product that sends email eventually sends two kinds, and the provider keeps one blocklist for both. One unsubscribe click stopped the mail our customers could not work without, and nothing errored.
Read →18px means 18px
Wiring a design AI to a coding AI to ship a real app, and finding that the oldest problem in software, design-to-code drift, doesn't vanish when both sides are machines. It sharpens. Here is the contract that fixed it.
Read →When not to use an LLM
Sometimes the right AI decision is no AI at all. Four times we were better off not reaching for a model, the quick test we run before we do, and the one case that is about you, not the task.
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