@envelop/core/esm/plugins/use-validation-rule.js

This is the core package for Envelop. You can find a complete documentation here: https://github.com/n1ru4l/envelop

export const useValidationRule = (rule) => {
    return {
        onValidate({ addValidationRule }) {
            addValidationRule(rule);
        },
    };
};