XcodeGen iOS workflow

Use this skill only when a repository already uses XcodeGen or is explicitly evaluating it. XcodeGen spec semantics belong here; local builds, simulators, launches, and test execution belong to xcode-build, and Xcode Cloud lifecycle policy belongs to xcode-cloud.

The mutable claims below were reviewed against XcodeGen 2.45.4 and current Apple documentation retrieved on 2026-07-16. Read references/primary-sources.md before changing toolchain, asset, destination, Swift package, or packaging guidance.

Establish the project contract