Hello world

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

internal/browser/browser.go

@@ -0,0 +1,34 @@
+// Package browser opens URLs in the user's web browser.
+package browser
+
+import (
+	"errors"
+	"os"
+	"os/exec"
+	"runtime"
+)
+
+// ErrRemote is returned over SSH, where a browser would open on the remote
+// machine rather than in front of the user.
+var ErrRemote = errors.New("can't open a browser over SSH")
+
+// Open starts the system's URL handler without waiting for it.
+func Open(url string) error {
+	if os.Getenv("SSH_TTY") != "" || os.Getenv("SSH_CONNECTION") != "" {
+		return ErrRemote
+	}
+	var cmd *exec.Cmd
+	switch runtime.GOOS {
+	case "darwin":
+		cmd = exec.Command("open", url)
+	case "windows":
+		cmd = exec.Command("rundll32", "url.dll,FileProtocolHandler", url)
+	default:
+		cmd = exec.Command("xdg-open", url)
+	}
+	if err := cmd.Start(); err != nil {
+		return err
+	}
+	go func() { _ = cmd.Wait() }() // reap the process
+	return nil
+}