Visual State Engines for Opaque UIs
How to think about automating browser and canvas interfaces when the useful application state only exists as pixels.
Blog
Efficient NixOS Remote Deploys with Selective Closure Copying
Remote NixOS deploys get dramatically faster when the target host fetches public dependencies from its own substituters and you only push the private bits. The key is `--use-substitutes` and the trusted-user detail most guides skip.
NUR — The Distributed Package Registry Nix Deserves
NUR flips the AUR model inside out. Instead of one giant package repo, every maintainer keeps their own repository and NUR indexes the lot. That gives you composability, selective trust, and a much wider ecosystem than most Nix users realize.
My Codex App Workflow: Triage, Fix Threads, and Just Enough Research
The practical Codex app workflow I settled into: one long-lived Triage thread, one focused Fix issue-XXX thread per task, and separate Research threads only when they actually earn their keep.
Monitoring nftables Firewall Rules with Prometheus and Grafana
Turning nftables rule counters into Prometheus time series with a custom exporter and Grafana dashboards, using rule comments as stable human-readable labels.
Hrafnsyn: Unified Air and Sea Tracking with Phoenix LiveView, PostGIS, and Nix
A tour of Hrafnsyn, a Phoenix LiveView app that merges ADS-B aircraft and AIS vessel data into one operational map, packages cleanly with Nix, and now runs as a real deployed service.
Building a Stratum 1 NTP Server with GPS/PPS on Raspberry Pi
Turning a Raspberry Pi 4 and a u-blox ZED-F9P into a stratum 1 LAN time server with chrony, PPS, Prometheus, and Grafana, including the ntpd detour that wasted a perfectly good evening.
Reliable Headless Raspberry Pi Provisioning on NixOS
For headless Raspberry Pi bring-up on NixOS, image-time secret injection is often more reliable than first-boot decryption on the device. Here's the provisioning flow, the brittle design we tried first, and why bootstrap state belongs under /var/lib rather than /etc.
Monitoring UPS Systems with NUT, Prometheus, and Grafana
Monitoring two Eaton UPS units across FreeBSD and Arch Linux ARM with NUT, DRuggeri's nut_exporter, Prometheus, and Grafana.
Monitoring Gardena on NixOS with prometheus-gardena-exporter
Get Gardena smart system data out of the phone app and into Prometheus and Grafana with a Rust exporter, a NixOS module, and per-valve water-use estimates that are honest about what the hardware can and cannot measure.