A production-grade GraphQL server library for Go that implements the September 2025 GraphQL specification. The library parses GraphQL Schema Definition Language (SDL), validates queries against the schema, and executes them using Go struct methods or field resolvers bound via reflection. It supports queries, mutations, subscriptions, Apollo Federation, introspection, and pluggable tracing (OpenTelemetry, OpenTracing). The codebase is well-tested with a novel validation parity harness that exports test cases from `graphql-js` to drive Go validation tests. It provides extensive configuration options including max query depth, parallel resolver limits, memory pool control, and deprecated usage validation. The library is not a standalone application but is designed as an importable package with example servers (Star Wars, social, caching, federation) demonstrating usage. Architecture follows a layered pattern: public API (`graphql.go`), schema parsing (`internal/schema`), query parsing (`internal/query`), validation (`internal/validation`), and execution (`internal/exec`). The resolver binding engine uses Go reflection to automatically map GraphQL fields to Go struct methods, enabling type-safe resolver definitions.