Ask HN: Best example codebases written in Go

I'm not a Go expert so hard to judge, but:

github.com/rclone/rclone - Somewhat complex with abstractions, plugins, filesystems, networking, multi-platform support etc

Go is self-hosting (https://en.wikipedia.org/wiki/Self-hosting_(compilers)) and not that old, so the source of the go compiler and its tools (https://go.googlesource.com/go) should be good examples (possibly not of all language features)

What do you mean by best?

Yeah, poor choice of words. Really just looking for codebases that are idiomatic, well written, and fun to read. Inspiration