At sufficient scale everything fails all the time, and the only real feature is being able to watch it happen.

_{— me, to a 🦆}

I work on the metric backend of Checkmk, its data backend for OpenTelemetry metrics that lets it monitor applications, not just infrastructure.
Before that I was at SAP, building the CI/CD infrastructure for HANA (their in-memory database): a graph-based task execution framework running on ~2000 compute nodes spread across multiple cloud providers and regions.

since 2021            csshW: broadcast your keystrokes to all your SSH sessions (successor: cssh-rs)
PyConDE '25            Rustifying Python: what's worth moving to Rust, and what will go wrong

2026-10-17 13:35 CEST  Checkmk/checkmk data backend: ask for central address on demand
(yesterday)            Checkmk/checkmk _{717 commits}

2026-10-17 12:53 CEST  Checkmk/checkmk data backend: add settings form component
(yesterday)            Checkmk/checkmk _{717 commits}

2026-10-15 22:27 CEST  whmade/cssh-rs  client: size the ConPTY to the console viewport and…
(thursday)             whmade/cssh-rs  _{570 commits · 118 pull requests · 152 issues}

2026-10-15 22:27 CEST  whmade/cssh-rs  daemon: broadcast keystrokes on the v1 CBOR…
(thursday)             whmade/cssh-rs  _{570 commits · 118 pull requests · 152 issues}

_{Last 30 days}

Python 61.2% (7.8k) · JavaScript 17.5% (2.2k) · Rust 14.3% (1.8k) · Other 7.0% (883)

_{All time}

Python 26.6% (80.5k) · JavaScript 24.3% (73.5k) · TypeScript 13.9% (42k) · Rust 13.3% (40.1k) · Vue 10.4% (31.5k) · Other 11.6% (35.2k)

_{Last updated 2026-10-18 18:32 CEST.}

_{Everything above refreshes every few hours via a small workflow. Here's how it's computed.
The 🦆 is maintained by hand.}