gemini-cli/packages/cli/src/utils/errors.ts

export function isNodeError(error: unknown): error is NodeJS.ErrnoException {
    return error instanceof Error && 'code' in error;
}

export function getErrorMessage(error: unknown): string {
    if (error instanceof Error) {
        return error.message;
      } else {
        // Attempt to convert the non-Error value to a string for logging
        try {
           const errorMessage = String(error);
           return errorMessage;
        } catch {
            // If String() itself fails (highly unlikely)
            return 'Failed to get error details';
        }
      }
}