Immutable, sealed JSON value tree mirroring the API proposed in JEP draft 8344154.

Core HTTP abstractions: Exchange, Handler, Router, Middleware, error hierarchy, and server configuration options.

A Java-based multi-module build system that infers what to do by inspecting project structure via pluggable extensions, then executes a dependency-ordered graph of tasks — no build scripts required.

JSON body reader and writer injected via Exchange attributes.

GraphQL over HTTP via graphql-java: SDL-first schema, query execution, and GraphiQL IDE handler.

JSON transport implementation using base-json for encoding and decoding.

Model Context Protocol server implementation over JSON-RPC 2.0 and HTTP POST.

Language Server Protocol support with Content-Length framing over stdio and TCP.

Integration test support: TestServer on ephemeral ports, TestRequest, TestResponse, and AssertJ assertions.

A Java-based multi-module framework for programmatically launching and controlling processes, JVMs, and Docker containers.