On Windows, if the core.autocrlf was not set, Worktree.Status will display unchanged files as modified. The Worktree.Status function currently takes config from local file only, and even if core.autocrlf is set globally, the core.autocrlf won't take effect.

package main

import "github.com/go-git/go-git/v6"

func main() {
	repo, err := git.PlainOpen(".")
	if err != nil {
		panic(err)
	}
	wt, err := repo.Worktree()
	if err != nil {
		panic(err)
	}
	status, err := wt.Status()
	if err != nil {
		panic(err)
	}
	println(status.String())
}

In order to make Worktree.Status take global config and work like git status, we should use ConfigScoped(config.SystemScope)