Koa GraphQL Middleware

koa-graphql is a middleware designed for Koa.js applications, enabling the quick and efficient setup of a GraphQL HTTP server. It serves as a direct port of the well-established `express-graphql` package, bringing its comprehensive features for handling GraphQL queries, mutations, and subscriptions to the Koa ecosystem. The current stable version, 0.12.0, was released in November 2021. While the project doesn't have a rapid release cadence, it provides a robust and stable foundation for integrating GraphQL into Koa-based APIs. Its key differentiators include seamless integration with Koa's middleware paradigm, out-of-the-box GraphiQL IDE support (including subscription capabilities), and extensive options for custom schema execution and error formatting. It supports both `graphql` v14 and v15 as peer dependencies, ensuring compatibility with a range of GraphQL projects and is maintained by the GraphQL community.