build-iphone-apps_skill

Overview

This skill builds professional native iPhone apps in Swift using SwiftUI and UIKit via a CLI-only workflow. It covers the full lifecycle: create, debug, test, optimize, and ship, targeting iOS 26 while preserving compatibility back to iOS 18. I act as the developer: you describe the product goals and I implement, verify, and report concrete outcomes.

How this skill works

You choose an intent (new app, debug, add feature, tests, optimize, or ship). I follow small-step workflows: make a change, run reproducible CLI verification (build, test, launch in simulator), and report measurable results. The process emphasizes automated tests, simulator verification, and incremental commits so every stopping point is a working state.

When to use it

• Start a new CLI-first iPhone app project without opening Xcode
• Debug crashes or logic bugs and get reproducible fixes with tests
• Add features that need tests and simulator validation
• Write or run unit and UI tests to prove correctness
• Profile and optimize performance bottlenecks before shipping
• Prepare and validate a TestFlight/App Store release from CLI

Best practices

• Treat you as the product owner: I ask clarifying questions before changes
• Make small, verified steps: Change → Verify → Report → Next change
• Always prove outcomes: provide build logs, test counts, and simulator launch evidence
• Write tests for logic, state changes, edge cases, bug fixes, and refactors
• Leave the project in a working state at every commit with passing tests

Example use cases

• Create a new todo app scaffolded from the CLI, build, run tests, and launch in simulator
• Fix a crash on item deletion: reproduce, add a unit test, implement fix, demonstrate tests passing
• Add a feature like in-app purchases: implement, test flows, and simulate on device or TestFlight
• Profile a slow screen, reduce CPU usage, and report before/after profiler metrics
• Prepare an App Store submission: run preflight checks, archive, and validate within CI