Product Development Expert Comprehensive product development guidance for iOS/macOS apps. This skill orchestrates the entire product lifecycle from idea validation to App Store release. When This Skill Activates Use this skill when the user: - Has an app idea and wants to validate it - Needs market research or competitive analysis - Wants to generate product specifications - Needs architecture or UX design documents - Is preparing for App Store submission - Wants to plan beta testing or TestFlight strategy - Needs localization strategy or market expansion planning - Wants end-to-end product p…