Hi what’s new in Xcode ?

Xcode 16 introduces several exciting new features and improvements to enhance the app development process. Here are some of the highlights:

Code Completion: Xcode 16 features an innovative new engine for code completion, powered by a model specifically trained for Swift and Apple SDKs. This engine uses your project symbols to customize suggestions and runs locally on your Mac, providing fast and private results. This is made possible by Apple silicon and is available when running Xcode 16 on macOS Sequoia.
Swift 6: The new language mode in Swift 6 provides concurrency safety guarantees, turning data races that are typically runtime issues into compile-time issues, improving code correctness and safety.
Previews: Xcode Previews now have a dynamic linking architecture that uses the same build artifacts for both previews and when you build and run, avoiding the need to rebuild your project when switching between the two. This results in a smoother and more productive workflow.
Builds: Xcode 16 introduces explicit modules, which improve parallelism, diagnostics, and debugging without changing any code. For C and Objective-C, explicit modules are on by default, while for Swift, you need to opt-in.
Swiftassist: A new feature called Swiftassist acts as a companion for coding tasks, helping with coding questions and experimenting with new APIs. It leverages a larger and more powerful model that runs in the cloud.
Instruments and Debugging: New features like a single view of backtraces, a flame graph for profiling data, and enhancements to localization catalogs are included to improve productivity and app quality.

For more detailed information, you can refer to the sessions "What’s new in Xcode 16" and "Platforms State of the Union" from WWDC 2024.