Swift 6 Concurrency: How to Build Rock-Solid AI Apps with Sendable and Actors

Modern AI applications are a concurrency nightmare. Think about it: you have an LLM performing heavy inference on a background thread, streaming tokens in real-time, while your SwiftUI interface needs to stay buttery smooth. One wrong move and you’re staring at a "data race"—those insidious, hard-to-debug crashes that happen when two threads fight over the same piece of data. With the release of Swift 6, Apple has fundamentally changed the game. By moving concurrency safety from a runtime "hope