Developer Refines iOS Fretboard App Using AI Pair Programming and Swift Testing

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A developer shared their Week 16 progress log detailing advances on a personal iOS fretboard practice application built with SwiftUI. Working alongside OpenAI's Codex, they defined and implemented the completion logic for a Note Practice mode, including progress display, feedback timers, fret-range controls, and automatic question transitions. When Codex generated unit tests using the older XCTest framework, the developer revised them to use Apple's newer Swift Testing framework, updating project documentation to preserve the policy for future AI sessions. Key technical work included implementing NotePracticeCalculator, introducing FretCellVisualState for explicit UI state representation, and resolving a Swift Concurrency warning by marking FretPosition as nonisolated. The developer also made incremental progress on TryHackMe's AI Security Learning Path alongside the app work.

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