feat: add command for local code review

cmd/errors.go

@@ -7,6 +7,41 @@ import (
 	"github.com/Use-Tusk/tusk-cli/internal/api"
 )
 
+// ExitCodeError wraps an error with a specific process exit code. main.go
+// unwraps this to pick the right os.Exit value; without it, Cobra-returned
+// errors map to exit 1.
+type ExitCodeError struct {
+	Code int
+	Err  error
+}
+
+func (e *ExitCodeError) Error() string {
+	if e == nil || e.Err == nil {
+		return ""
+	}
+	return e.Err.Error()
+}
+
+func (e *ExitCodeError) Unwrap() error {
+	if e == nil {
+		return nil
+	}
+	return e.Err
+}
+
+// ExitCodeOf returns the exit code embedded in err (or any wrapper in its
+// chain), defaulting to 1 if none is present.
+func ExitCodeOf(err error) int {
+	if err == nil {
+		return 0
+	}
+	var ec *ExitCodeError
+	if errors.As(err, &ec) {
+		return ec.Code
+	}
+	return 1
+}
+
 // formatApiError converts raw API errors into user-friendly messages with
 // actionable guidance. Non-API errors pass through unchanged.
 func formatApiError(err error) error {