Verify Your Setup

Don't skip this step. Discovering a broken setup halfway through your build is much worse than discovering it now.

Check Swift and Xcode versions

swift --version
xcodebuild -version

You should see Swift 6.x and Xcode 16.x. If not, reopen Xcode and let it finish installing components.

Check Claude Code

claude --version

Then test the Apple skills are visible:

claude
# Once in a session, type:
# /skills

You should see swiftui-expert-skill in the list.

Build a test project on Simulator

This is the definitive check — if you can build and run on Simulator, your environment is ready.

1. Open Xcode
2. Choose Create New Project
3. Select iOS → App, click Next
4. Name it TestApp, interface SwiftUI, language Swift
5. Save it to your Desktop
6. Select any iPhone Simulator from the device picker (top centre bar)
7. Press Cmd+R to build and run
8. The Simulator should launch and show a "Hello, world!" view

If this works, delete the TestApp project — you don't need it anymore.

Check disk space

df -h ~

You need at least 20GB free before starting a real project.

Checkpoint

• swift --version returns Swift 6.x
• xcodebuild -version returns Xcode 16.x
• Claude Code starts and shows Apple skills
• TestApp ran on Simulator without errors
• 20GB+ free disk space

All green? You're ready to build. Move to Project Kickoff.