how should I prepare my app for swift 6?

To prepare your app for Swift 6, you should follow a structured migration process. Here are the key steps:

1. Enable Complete Concurrency Checking: Start by enabling complete concurrency checking in your project. This is a per-module setting that allows your project to remain in Swift 5 mode while generating warnings for code that would fail under Swift 6's enforced data isolation. This step helps you identify and resolve potential data race issues.

2. Resolve Warnings: Go through the warnings generated by the concurrency checking and resolve them. This process involves making necessary code changes to ensure data race safety.

3. Enable Swift 6 Mode: Once all warnings are resolved for a module, enable Swift 6 mode for that module. This locks in your changes and ensures that future modifications do not introduce unsafe code.

4. Incremental Migration: Migrate your app incrementally, one module at a time. This approach allows you to manage the transition smoothly without waiting for all dependencies to migrate.

5. Utilize Compiler Diagnostics: The Swift 6 compiler provides diagnostics that guide you towards areas in your code that need fixing. Think of it as a pair programmer helping you identify potential bugs.

6. Adopt New Features: Consider adopting new concurrency features and other improvements introduced in Swift 6 to enhance your app's performance and responsiveness.

For more detailed guidance, you can refer to the session Migrate your app to Swift 6 (07:26) which covers the strategy for migration.

Additionally, the session Platforms State of the Union (31:22) discusses the benefits of the new Swift 6 language mode, including compile-time data race safety.

By following these steps, you can ensure a smooth transition to Swift 6 while taking advantage of its new features and improvements.