New on CRAN: fluffy (1.0.0). View at https://CRAN.R-project.org/package=fluffy
cran.r-project.org
A schema-based validation framework for 'R' objects using user-defined rules. Provides three 'S7' classes 'Registry', 'Schema', and 'Validator' to manage rules, define list-based schemas, and validate data in a flexible and extensible manner.