What version of Go are you using (go version)?

https://go.dev/dl/go1.18.1.windows-amd64.zip

What did you expect to see?

I don't think pkg/tool/windows_amd64/api.exe should be included. pkg/tool/linux_amd64/api isn't included in the Linux tar.gz.

The logic behind leaving out api is explained in cmd/release/release.go#L506-L510 and #13030:

	// Users don't need the api checker binary pre-built. It's
	// used by tests, but all.bash builds it first.
	if err := client.RemoveAll(ctx, b.toolDir()+"/api"); err != nil {
		return err
	}

• x/build/cmd/release: do not ship cmd/api binary #13030

What did you see instead?

pkg/tool/windows_amd64/api.exe is in the zip. It also shows up after using the msi installer.

I think cmd/release is probably just missing the code to remove the .exe because it was originally written with Linux in mind. I spotted this when I was comparing a Go build I did vs. the official Go build--this didn't break something I was working on. It seems pretty minor. (The file is only 5 MB.)