This package provides a modern, S7'-based foundation for survey analysis spanning both probability and non-probability samples. Probability sample designs include Taylor series linearization, replicate weights (BRR, Fay, jackknife, bootstrap), and two-phase estimation, following Lumley (2004) <doi:10.18637/jss.v009.i08>. Non-probability sample designs support bootstrap and jackknife variance estimation for opt-in panels and convenience samples. Provides a unified estimator interface for means, frequencies, totals, quantiles, ratios, correlations, regression, and t-tests, with weighted polychoric and polyserial correlation following Mannan (2025) <doi:10.2139/ssrn.6580480>. A metadata system preserves haven'-style variable labels, value labels, and question-preface attributes through all operations. Uses a tidyselect interface throughout.