Agent skills for Claude Code

Resolve Swift concurrency compiler errors, adopt approachable concurrency (SE-0466), and write data-race-safe async code.

Swift 6.1–6.3 knowledge: default MainActor isolation, @concurrent, InlineArray, Span, @c interop, module selectors, Swift Testing updates.

Guide ordinary build, run, manifest, dependency, resource, Metal-packaging, and Release-versus-Debug work in existing Swift Package…

Use when the task claims a latency, throughput, allocation, memory, startup, compilation, or energy improvement, or when optimizing hot…

Implements protocol-based dependency injection to create testable, decoupled Swift code for file systems, networks, and APIs.

Use when working with iOS/macOS Keychain Services (SecItem queries, kSecClass, OSStatus errors), biometric authentication (LAContext, Face…

Swift code style conventions for clean, readable code.

This skill should be used when the user is working with Swift or SwiftUI, asks to "write SwiftUI code", "create iOS app", "fix SwiftUI…

Use when the user mentions SwiftData review, @Model issues, SwiftData migration safety, or SwiftData performance checking.

Reviews SwiftData code for model design, queries, concurrency, and migrations.

SwiftlyS2 toolkit for creating, modifying, auditing, planning, reviewing, and directly editing C#/.NET SwiftlyS2 plugins.

Implement, diagnose, or review SwiftUI motion using explicit and scoped implicit animations, springs, transitions, PhaseAnimator…

Reviews SwiftUI code for view composition, state management, performance, and accessibility.

Use when the user mentions SwiftUI layout review, adaptive layout issues, GeometryReader problems, or multi-device layout checking.

Build SwiftUI layouts using stacks, grids, lists, scroll views, forms, and controls.

Use when debugging navigation not responding, unexpected pops, deep links showing wrong screen, state lost on tab switch or background…

Apple-authored SwiftUI and platform guidance extracted from Xcode.

Bridges UIKit and SwiftUI with UIViewRepresentable, UIViewControllerRepresentable, UIHostingController, UIHostingConfiguration…

Refactor oversized SwiftUI view files into stable, dedicated subviews with MV-first data flow, explicit dependencies, extracted actions…

Orchestrates primary-source research for complex, comparative, or unsettled Swiss legal questions (Rechtsfrage, question juridique) across…

This skill should be used when the user asks to "create an agent", "add an agent", "write a subagent", "agent frontmatter", "when to use…