add-dials-parameterlisted

# Add Dials Parameter **Create custom tuning parameters for hyperparameter tuning in Tidymodels** Guide for creating new dials parameters for hyperparameter tuning. Use when a developer needs to define custom tuning parameters for models, recipes, or workflows, including quantitative parameters (continuous/integer), qualitative parameters (categorical), parameters with transformations, and data-dependent parameters requiring finalization. -------------------------------------------------------------------------------- ## Two Development Contexts This skill supports **two distinct development contexts** with different capabilities and constraints: ### 1. Extension Development (Primary Context) **Use when:** Creating a new R package that defines custom tuning parameters - ✅ Build new packages extending Tidymodels with custom parameters - ✅ Use all exported dials functions with `dials::` prefix - ❌ Cannot use internal functions (`:::`) - 📘 **Start here:** [Extension Development Guide](references/extension-guide.md) **Package detection:** DESCRIPTION file does NOT have `Package: dials` ### 2. Source Development (Advanced Context) **Use when:** Contributing parameter definitions directly to tidymodels/dials repository - ✅ Contribute parameters to dials package itself - ✅ Access internal helper functions without `dials::` prefix - ✅ Use validation helpers (`check_type()`, `check_range()`) - ✅ Create custom finalize functions with `range_get()`/`range_set()` -