def directory_skeleton(param_dict, proj_dict):
    """
    Creates the directory skeleton for the current project

    Parameters
    ----------
    param_dict : `dict`
        Dictionary with `project` variables

    proj_dict : `dict`
        Dictionary with info of the project that uses the
        `Data Science` Cookiecutter template.

    Returns
    ---------
    proj_dict : `dict`
        Dictionary with current and new paths to project directories
    """
    # Directory of Cosmological files
    cosmo_dir = param_dict['survey_args'].cosmo_outdir(create_dir=True)
    # Halo Mass Function - Directory
    mf_dir = param_dict['survey_args'].mass_func_output_dir(create_dir=True)
    ##
    ## Saving to dictionary
    proj_dict['cosmo_dir'] = cosmo_dir
    proj_dict['mf_dir'   ] = mf_dir
    
    return proj_dict