NEWS

restrictR 0.1.2

New steps: require_scalar(), require_not_null(), require_unique(), require_named().
New steps: require_positive() and require_negative() with strict argument (non-strict by default).
require_integer() gains a strict argument. Default (strict = FALSE) accepts any numeric whole number; strict = TRUE requires the R integer type.

Export fail() so custom steps produce canonical structured errors.
as_contract_text() now capitalizes every sentence, not just the first.
require_between() and require_one_of() omit the At: line for scalar values where it adds no information.
Vignette: added "Data Frame with Mixed Constraints" section, surfaced immutability in the overview, updated custom step examples to use fail().
README: tightened prose, removed AI-ish phrasing.

Initial release.
Core constructor: restrict() for building composable validators.
Building blocks: require_df(), require_numeric(), require_character(), require_length(), require_length_matches(), require_nrow_min(), require_has_cols(), require_col_numeric(), require_col_character(), require_col_range(), require_range(), require_one_of().
Dependent validation via one-sided formulas with explicit context passing.
Path-aware error messages (e.g. newdata$x2 must be numeric).
as_contract_text() for roxygen-compatible documentation.