Changes in version 1.0.0 (2026-10-16)                  

  - Initial release. Fits two-equation simultaneous hazard/probit models
    (probit, log-normal, or piecewise-Gompertz equations) linked by a
    Gaussian-copula correlation, via fit_lillardhaz().
  - print, summary, and predict S3 methods for "lillardhaz" objects.
  - Verified by simulation against known parameters for every eq1×eq2
    combination, correlated and independent (corr = FALSE).