#' greenbook: HM Treasury Green Book Cost-Benefit Analysis Primitives
#'
#' Implements cost-benefit analysis primitives from HM Treasury Green Book
#' guidance: the kinked Social Time Preference Rate (STPR), discount factors,
#' net present value, equivalent annual cost, and GDP-deflator rebasing.
#' Pure computation, no network access. Bundled parameter tables carry
#' vintage metadata for reproducibility.
#'
#' @keywords internal
"_PACKAGE"

#' @importFrom cli cli_abort cli_inform cli_warn cli_text cli_h1
#' @importFrom stats median
#' @importFrom utils read.csv
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