gsDesignTune: Dependency-Aware Scenario Exploration for Group Sequential Designs

Provides systematic, dependency-aware exploration of group sequential designs created with 'gsDesign'. Supports reproducible grid and random search over user-defined candidate sets, parallel evaluation via the 'future' framework, standardized metric extraction, and auditable reporting for design-space evaluation and trade-off analysis. Methods for group sequential design are described in Anderson (2025) . The 'future' framework for parallel processing is described in Bengtsson (2021) .