Bun's JavaScriptCore Class Bindings Generator

Bridge JavaScript and Rust through .classes.ts definitions and Rust implementations.

Architecture

1. JavaScript Interface Definition (.classes.ts files)
2. Rust Implementation (.rs files)
3. Generated Code — src/codegen/generate-classes.ts emits C++ + Rust into ${BUN_CODEGEN_DIR}/generated_classes.rs, include!d as crate::generated_classes in bun_runtime. Run bun bd to regenerate.

Class Definition (.classes.ts)