Agent skills for Gemini CLI

When to activate: Swift performance optimization, value types, COW, ARC, Instruments profiling, memory layout, compile-time optimization

Use when Swift defines or changes XPC, socket, IPC, Codable, serialization, plugin, or other process/module boundaries.

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

When to activate: Swift protocols, protocol extensions, associated types, protocol composition, existentials, primary associated types…

Use for an adversarial review of a Swift diff or pull request.

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

When to activate: Keychain, certificate pinning, encryption, biometrics, secure storage, App Transport Security in Swift

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 Swift touches POSIX, file descriptors, sockets, pointers, buffers, C ABI, mmap, unsafe code, or manual cleanup.

Use when Swift code has copying, mutation, identity, copy-on-write, large aggregates, or a struct-versus-class decision.

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.

Diagnose SwiftPM graph overhead across dependencies, plugins, module variants, branch pins, macros, binary targets, and slow CI or local…

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…

Use when implementing iOS 17+ SwiftUI patterns: @Observable/@Bindable, MVVM architecture, NavigationStack, lazy loading, UIKit interop…