This is a Nuxt 3 module that integrates Apollo GraphQL client into Nuxt applications. It provides a flexible configuration system for defining multiple Apollo clients with HTTP and WebSocket endpoints, authentication token management, and SSR support. The module auto-imports composables like useAsyncQuery, useQuery, useMutation, and useSubscription, and provides hooks for custom authentication and error handling. It also supports hot module replacement for Apollo client configuration files. The architecture uses Nuxt's module system (defineNuxtModule) to hook into the build process. It reads client configurations from nuxt.config or external files, generates runtime templates, and sets up a Nuxt plugin that creates ApolloClient instances with appropriate links (HTTP, WebSocket, auth, error). The composables layer provides SSR-friendly async query wrappers and authentication helpers. WebSocket support includes a restartable client for reconnection. Key entry points are src/module.ts (module setup), src/runtime/plugin.ts (client creation and plugin), and src/runtime/composables.ts (user-facing composables). External dependencies include @apollo/client, @vue/apollo-composable, graphql-ws, and @nuxt/kit.