rust-module-organization-public-api-design

Define your Rust public API by using `src/lib.rs` for re-exports to establish a clear interface. Organize modules by feature and manage visibility carefully with `pub` and `pub(crate)` to ensure backward compatibility and prevent unintended breaking changes.

Prevent breaking changes in a Rust library by carefully managing what is exposed publicly. Use `pub(crate)` to hide internal implementation details and validate your stable interface using tools like `cargo-public-api` to ensure future updates do not break existing user code.

Use `src/lib.rs` to re-export items from nested modules, creating a flat and accessible public API surface. This pattern simplifies the user experience by hiding the internal module hierarchy while maintaining a stable, maintainable interface for your Rust library.

Yes, you can validate your Rust public API surface using `cargo-public-api`. This tool helps verify that your module organization and visibility controls correctly define the intended interface, ensuring maintainability and preventing unexpected breaking changes across versions.

Use `pub(crate)` visibility in Rust module organization when you need items to be accessible within your crate but hidden from external users. This prevents internal implementation details from leaking into your public API, ensuring stability and maintaining backward compatibility.