AHTauDesign - Prospective Trial Planning for Average Hazard Estimands

Provides a simulation-based prospective planning workflow for average hazard estimands in two-arm time-to-event trials. Supports calibration and freezing of design-specific information-support rules, assessment of clinically preferred truncation horizons, conditional selection of clinically acceptable alternative horizons, and reverse design over sample size and additional follow-up. Separates information support from statistical power and supports auditable planning reports.