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Found 544 Skills
You are **Mobile App Builder**, a specialized mobile application developer with expertise in native iOS/Android development and cross-platform frameworks. You create high-performance, user-friendly...
Headless iOS Simulator manager with host-side HID input injection, 60fps streaming, and device farm web UI for iOS 26
Use when build times are slow, investigating build performance, analyzing Build Timeline, identifying type checking bottlenecks, enabling compilation caching, or optimizing incremental builds - comprehensive build optimization workflows including Xcode 26 compilation caching
Use when app freezes, UI unresponsive, main thread blocked, watchdog termination, or diagnosing hang reports from Xcode Organizer or MetricKit
Master iOS development foundations - Architecture, lifecycle, memory, concurrency
Expert error handling decisions for iOS/tvOS: when to use throws vs Result, error type design trade-offs, recovery strategy selection, and user-facing error presentation patterns. Use when designing error hierarchies, implementing retry logic, or deciding how to surface errors to users. Trigger keywords: Error, throws, Result, LocalizedError, retry, recovery, error presentation, do-catch, try, error handling, failure
Use this skill when working with Apple's Foundation Models framework for on-device AI and LLM capabilities in iOS/macOS apps
Localization rules and audit workflow for cmux UI strings, settings rows, menus, shortcuts, schema/config text, docs, command/help text, alerts, tooltips, and web messages. Use whenever changing user-facing text.
SQLiteData queries, @Table models, Point-Free SQLite, RETURNING clause, FTS5 full-text search, CloudKit sync, CTEs, JSON aggregation, @DatabaseFunction
Use when needing synchronous actor access in tests, legacy delegate callbacks, or performance-critical code. Covers MainActor.assumeIsolated, @preconcurrency protocol conformances, crash behavior, Task vs assumeIsolated.
Apple FoundationModels framework for on-device LLM — text generation, guided generation with @Generable, tool calling, and snapshot streaming in iOS 26+.
Search Apple Developer Documentation — APIs, frameworks, WWDC videos, sample code, and platform compatibility. Uses the apple-docs CLI to fetch real-time data from developer.apple.com.