This is a Rust language binding for the Godot 4 game engine, implemented as a GDExtension library. The repository provides a comprehensive, safe, and idiomatic Rust API to define Godot classes, methods, signals, properties, and async tasks. It consists of multiple interdependent crates: `godot-bindings` for locating the Godot binary and loading API JSON, `godot-codegen` for generating Rust FFI wrappers and core mappings from Godot's extension API, `godot-core` containing built-in type wrappers (Variant, Vector2/3/4, Color, Basis, etc.), object model (`Gd<T>`, `Base<T>`, `DynGd<T>`), signal system, property registration, and conversions, `godot-ffi` for low-level FFI type definitions and binding storage, `godot-macros` providing procedural macros (`#[derive(GodotClass)]`, `#[godot_api]`, `#[func]`, `#[signal]`, `#[var]`, `#[export]`), and `godot-cell` for safe interior mutability (`GdCell`). The codebase is heavily code-generated, extensively integration-tested inside a real Godot process, and includes benchmarks, hot-reload support, and a complex build pipeline. It is a tightly coupled framework that mimics Godot's object-oriented model in Rust with careful safety and thread-safety considerations. The design shows high craftsmanship in FFI abstraction, type conversion traits, and macro-driven registration, but also carries technical debt due to version-specific conditional compilation and deep dependencies on Godot's runtime layout.