Projects

The whole operating system is a container image. It is built from a Dockerfile and shipped through a registry. An update replaces the root filesystem at once. The new image goes into the second of two slots on Btrfs, and the device boots it. If it does not come up, the device rolls back to the old one on its own. So no device is left with a half-finished update.

CuOS is made for devices nobody stands in front of. These include edge devices, kiosks, embedded systems and VMs. CuOS started in 2025. Since early 2026 a commercial product has been built on it. CuOS runs in production in more than 20 environments on x86_64, LXC and 64-bit Raspberry Pi.

The services, versions and configuration of a system live in a Git repository. Every device pulls it and applies it locally. It can verify the commit signatures. A small web interface on each device shows its state and logs. About six environments with more than 30 systems run on it in several companies and private households. It is the default init app of CuOS.

The idea goes back to sysgit. I wrote this Git-based provisioning toolkit for Debian in 2018.

BrainDesk is a collaborative web interface for a knowledge base made of Markdown files. It offers a WYSIWYG editor, typed documents, boards and Git sync, and it needs no database. The files are the only source of truth, which makes the knowledge base just as readable for an AI agent as for a person.

I plan and steer my own projects with it, including this website.

osiota is a JavaScript platform that runs distributed IoT applications for energy management, smart homes, and building and studio automation. Several osiota processes connect in layers from the devices through the building to the cloud. They share devices and applications. Each layer processes its own data and passes on only what the next one needs. That way data stays where it is needed. Apps for GPIO, 1-Wire, Modbus, DMX, Art-Net and more live in the osiota organisation.