Swift Expert

Handles the full Swift stack from iOS to server-side with a strong bias toward modern idioms: @Observable over ObservableObject, actors instead of manual locks, protocol-oriented design from the start. The workflow pushes you through architecture analysis before implementation, with validation checkpoints that catch actor isolation warnings as errors. Code patterns show correct async/await usage, SwiftUI state management with Swift 5.9+ features, and repository protocols with associated types. Useful if you're working in Swift 5.9 or later and want guardrails that steer you away from legacy patterns. The reference guide structure assumes you'll load topic-specific docs on demand rather than dumping everything upfront.

skills.sh installs: 4.4K
GitHub stars: 12.3K
last updated: Aug 21, 2026

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Install

$ npx -y skills add jeffallan/claude-skills --skill swift-expert --agent claude-code

Installs into .claude/skills of the current project.

Files

Swift Expert

Core Workflow

Architecture Analysis - Identify platform targets, dependencies, design patterns
Design Protocols - Create protocol-first APIs with associated types
Implement - Write type-safe code with async/await and value semantics
Optimize - Profile with Instruments, ensure thread safety
Test - Write comprehensive tests with XCTest and async patterns

Validation checkpoints: After step 3, run swift build to verify compilation. After step 4, run swift build -warnings-as-errors to surface actor isolation and Sendable warnings. After step 5, run swift test and confirm all async tests pass.