Martijn Stegink

Projects I build at home, and the mistakes I made.

I’m COO at Scotty AI, a European platform for AI agents. Before that I was freelance CIO, including at War Child, and IT director at Greenpeace International and G-Star.

What I do in my job, I also do at home: organizing, structuring, and reorganizing processes. Nowadays with AI. I build it myself before I give it to someone else, because I learn something from it and I like it, it’s fun. And that gets me an energy report that’s ready every morning at seven o’clock, ten years of health data that I can finally read, a recipe collection that organizes itself, and three novels.

Here I write about the projects I do, how I went about them, which mistakes I made, and sometimes what I would do differently. Sometimes I show the results, and sometimes it’s just the story.

Stille Stroom

A fault in the power grid, and everything that follows happens exactly as it was designed to. No villain, nobody who made a mistake. What is left is a handful of people who have to explain a crisis that no one caused.

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Approaches

  • Ten apps for one house, and none of them did what I wanted. With AI, Home Assistant turned out to be a different thing: I decide how it should work and look, and the technical work is no longer mine.

  • I now dictate a large part of my work instead of typing it, three to four times faster. Not with one of the paid apps that promise exactly that, but with a cloud cleaning setup of my own, tested to get right.

  • From an expensive site that made every change a chore to a free and flexible one I keep up with AI: a few keywords in a chat, a piece of writing back, one approval, and it is online.

  • From scenario exploration to a first draft of 20,000 words, then fourteen rounds of deepening to 70,000. What happened in each round, and why the book fell apart into 25 separate files along the way.

  • An energy report every morning at seven coming soon

    Home Assistant measures, a scheduled task does the arithmetic, and I read on my phone what happened yesterday. Savings, small fixes and investments with a payback period, kept apart.

  • Ten years of Apple Health, 3.66 million records coming soon

    One script with no external packages, on a Synology running Python 3.8, that reduces a ten-year export to 96 daily values per day.

Ideas

  • De Rekening, a second novel

    An oversight body for AI, modelled on the one aviation has, and the published model weights that fall outside its mandate.

  • My recipes in an app of my own

    Out of Apple Notes and into a container on the NAS, with a hook so a new recipe goes straight in.

  • Martijns Kitchen, the cookbook

    The recipes I already have, out of Apple Notes and into one book, with the photos from the Instagram archive.

  • De Sectoren, a third novel

    Twenty-four connections out of a closed test network, and a report that nobody read. Then a shutdown sector by sector, and an order that nobody withdraws.

  • A 1955 Braun radio as a Sonos speaker

    Secondhand IKEA Symfonisk internals into a Braun SK1 from 1955.

  • A smart home on the boat

    Measuring what the boat uses the way the house already does.

  • The wifi at home, properly this time

    Fibre into a KPN box, then Google Wifi in NAT mode, so everything at home sits behind two layers of NAT. One router too many.

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