confuser/graphql-constraint-directi...

This project provides a GraphQL directive called `@constraint` that allows developers to validate input data directly in their GraphQL schema. It supports various validation rules for strings (length, format, patterns), numbers (min/max values, multiples), and arrays (item counts). The library is designed for GraphQL API developers who want to enforce data validation rules at the schema level without writing custom validation logic, and it offers multiple integration options including schema wrappers and plugins for different GraphQL server implementations.