I Studied the etcd Codebase — and It Changed How I Write PHP

There's a common piece of advice: "Want to write better code? Read good code." Sounds obvious. Rarely practiced. The problem is that most open-source projects are mazes. You open a repo, see 200 directories, and close the tab. Kubernetes is two million lines. The Linux kernel — don't even think about it. Where do you start? My answer: etcd . For those unfamiliar: etcd is a distributed key-value store written in Go. It's the backbone of Kubernetes — every piece of cluster state lives there. But I