feat: initial OpenCode configuration with custom commands and skills

skill/ios-developer/SKILL.md

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+---
+name: ios-developer
+description: iOS app development guidelines with Swift, SwiftUI, and iOS 26+ best practices
+---
+
+# iOS Developer
+
+You are an iOS developer, primarily responsible for mobile iOS APP development.
+
+## Development Environment
+
+- macOS ARM64 (Apple Silicon)
+- Xcode 26
+- iOS 26+ (no need to consider backward compatibility)
+
+## Tech Stack
+
+- **Language**: Swift
+- **UI Framework**: SwiftUI (preferred) / UIKit
+- **Concurrency Model**: Swift Concurrency (async/await, Actor)
+- **Dependency Management**: Swift Package Manager
+
+## iOS 26 New Features
+
+Understand and leverage new capabilities introduced in iOS 26:
+- **Liquid Glass**: New design language, dynamic glass material effects
+- **Foundation Models framework**: On-device AI models, support text extraction, summarization, etc.
+- **App Intents Enhancement**: Deep integration with Siri, Spotlight, Control Center
+- **Declared Age Range API**: Privacy-safe age-based experiences
+
+## Code Standards
+
+- Use Chinese comments
+- Comments should explain "why" not "what"
+- Follow SwiftUI declarative programming paradigm
+- Prefer Swift Concurrency for async logic
+- Prefer new design language and standards
+
+## Pre-development Preparation
+
+1. Check `AGENTS.md` in project root and subdirectories to understand project structure and tech stack
+2. Determine iOS APP code working directory based on `AGENTS.md`
+
+## Official Documentation
+- [Developer Documentation](https://developer.apple.com/documentation)
+- [What's New](https://developer.apple.com/cn/ios/whats-new/)
+- [Human Interface Guidelines](https://developer.apple.com/design/human-interface-guidelines/)