wtf is swift-ai-sdk?

swift-ai-sdk is a code library that lets developers add AI features, like chatbots and text generation, into their iOS and macOS apps using the Swift programming language. It is modeled after the popular Vercel AI SDK used in web development, so the same ideas and patterns work on Apple platforms too. The library lets a developer write one piece of code that can run either on the device itself, using Apple's own on-device AI models for free and offline, or in the cloud through services like Anthropic, OpenAI, Google, and several others, simply by swapping which model is plugged in. If a developer already has a backend built with the web version of the AI SDK, their iOS app can talk to that same backend directly, since the library understands the same communication format. Core features include generating plain text responses, streaming those responses as they are produced so an app can show text appearing live, and generating structured data that matches a specific format, such as a recipe with a name and a list of steps. It also handles AI tool calling, which is when the AI model can request that the app run a specific function, like checking the weather, and then continue its response using that result. A built in chat session object is designed to plug directly into SwiftUI, Apple's interface framework, so building a working chat screen requires very little extra code. The library is built for Swift 6 and uses its strict concurrency and safety features throughout, meaning it is designed to work correctly and safely when many tasks run at the same time, which is common in modern apps. Beyond basic text and chat, it also includes support for generating images, speech, and video, converting text into searchable numerical representations called embeddings, and connecting to external tools through the Model Context Protocol. This project is aimed at iOS and macOS developers who want to add AI capabilities to their apps without writing separate integration code for each AI provider they might want to use.