Foundation Chat

A minimal macOS chat app powered by Apple's on-device Foundation Models.

Requirements

• macOS Sequoia 26.0 or later
• Apple Silicon Mac
• Xcode 16.0+

Features

• On-device AI chat using Apple's Foundation Models
• Streaming responses
• Cancel generation mid-stream
• Clean, native macOS UI
• Zero external dependencies

Building

Open FoundationChat.xcodeproj in Xcode and build (Cmd+B).

Architecture

FoundationChat/
├── FoundationChatApp.swift   # App entry point
├── ChatView.swift            # Main UI
├── ChatViewModel.swift       # State management
├── Message.swift             # Data model
└── MessageBubble.swift       # Message UI component

~200 lines of Swift. MVVM architecture with @Observable and @MainActor.

License

MIT