Developer Tools & Repos Agent Skills for Claude Code

Use when writing ANY code with async, actors, threads, or seeing ANY concurrency error.

Use when working with ANY data persistence, database, axiom-storage, CloudKit, migration, or serialization.

Capture and interpret ETTrace profiles for iOS simulator apps, including symbolicated launch and runtime flamegraphs.

iOS ETTrace Simulator profiles: capture and interpret symbolicated startup, scrolling, navigation, rendering, CPU hotspots, and…

Use when building ANY 2D or 3D game, game prototype, or interactive simulation with SpriteKit, SceneKit, or RealityKit.

Use when working with ANY GPU rendering, Metal, OpenGL migration, shaders, frame rate, or display performance.

Use when designing iOS interfaces, implementing accessibility (VoiceOver, Dynamic Type), handling dark mode, ensuring adequate touch…

Generate iOS app icons as PNG imagesets for Xcode asset catalogs from SF Symbols (5000+ Apple-native) or Iconify API (275k+ open source…

Design and implement iOS App Intents, AppEntity, EntityQuery, and App Shortcuts for Siri, Spotlight, widgets, controls, Shortcuts, and app…

Implement, refactor, or review iOS 26+ SwiftUI Liquid Glass with native `glassEffect`, `GlassEffectContainer`, button styles, availability…

Standards for String Catalogs, L10n, and Asset Management.

Implement, review, or improve localization and internationalization in iOS/macOS apps — String Catalogs (.xcstrings), generated…

Automates the management and translation of .xcstrings localization files for Apple platform applications.

Use when the user wants to automate capture of marketing screenshots for a SwiftUI iOS app across multiple locales, devices, or appearances.

iOS memgraph leak analysis: capture, inspect, compare, and prove memory leaks with Apple's `leaks` tool, retain-cycle evidence, and…

Use when implementing or debugging ANY network connection, API call, or socket.

Use when app feels slow, memory grows, battery drains, or diagnosing ANY performance issue.

Build and distribute Expo development clients locally or via TestFlight

RocketSim iOS Simulator UI: inspect and control accessibility state, gestures, typing, hardware buttons, and CLI automation.

Mirror iOS Simulator runs in the Codex browser for interaction, visible proof, and hot-reloaded SwiftUI previews from importable Swift…

Debug iOS Simulator apps with XcodeBuildMCP for build, run, launch, UI inspection, interaction, screenshots, and logs; route user-visible…