Agent skills for Codex CLI

Expert guidance on Swift library and framework design.

When to activate: Swift Macros, @attached, freestanding macros, #stringify, macro expansion, SE-0382, SE-0389

Use when Swift code owns a unique resource, has `~Copyable`/`borrowing`/`consuming` diagnostics, or needs an ownership-aware API.

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

When to activate: Swift Package Manager, Package.swift, dependencies, targets, products, local packages, version resolution

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.

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…

Guides SwiftUI layout optimization and resolves complex iOS and watchOS provisioning, code signing, and deployment issues.

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

SwiftUI frontend design skill — anti AI-slop rules, design direction advisor, brand asset protocol, and five-dimension review. Works with Cl