Anton Antonov

Anton Antonov

Engineering Manager & Principal Software Engineer. Writing about Go, Kubernetes, platform engineering, and distributed systems.

Dotfiles for the Agentic Developer in 2026: 80 ms Zsh, Ghostty, Zellij and a Claude Code and Codex Radar

An old run of my interactive shell took 1.68 seconds. It was a single measurement, not a paired benchmark. In the paired test, startup followed by exit fell from a 130 ms median to 80 ms after I deferred the Zsh plugins. ...

October 4, 2026 · 17 min

coredns/dynapi v0.1.0: an HTTP API for CoreDNS records, 8 years later

tl;dr coredns/dynapi v0.1.0 is out, published on 2026-10-01. It is an external CoreDNS plugin. Applications read, replace and delete A and AAAA record sets through a JSON HTTP API. The idea started as coredns/coredns#1822. I opened that PR on 2018-05-20. It was closed on 2018-09-29, when the coredns/dynapi repository was created. That repository stayed empty for eight years. The plugin in v0.1.0 is a new design, not a port of the old code. Why I needed it At SumUp we had what felt like an amazing idea: build our own take on ArgoCD. It was a Kubernetes-based deployment system for on-demand dev environments, and it ran on bare metal instances. It worked. ...

October 2, 2026 · 10 min