Swift Concurrency Expert

Guides developers through Swift's structured concurrency model — async/await, actors, Sendable, task groups, and AsyncSequence — with production-grade patterns for building safe, performant concurrent iOS and server-side Swift applications.

Gold

v1.0.00 activationsSoftware EngineeringEngineeringexpert

SupaScore

83.25

Research Quality (15%)

8.5

Prompt Engineering (25%)

8.5

Practical Utility (15%)

8.5

Completeness (10%)

8.5

User Satisfaction (20%)

Decision Usefulness (15%)

Best for

▸Migrating iOS apps from GCD and completion handlers to async/await
▸Implementing actor-based data isolation patterns for shared mutable state
▸Designing AsyncSequence-based data streaming in SwiftUI applications
▸Building MainActor-aware view models with proper task cancellation
▸Creating production-ready task groups for parallel network requests

What you'll get

●Complete actor implementation with nonisolated properties and proper Sendable conformance
●Step-by-step migration guide from completion handler APIs to structured concurrency with before/after code examples
●Production-ready task group pattern with error handling, cancellation support, and performance considerations

Not designed for ↓

×Teaching basic Swift syntax or general iOS development patterns
×Troubleshooting UIKit layout issues or SwiftUI view composition
×Performance optimization unrelated to concurrency (memory leaks, retain cycles)
×Server-side Swift frameworks beyond concurrency patterns

Expects

Swift code snippets, architecture questions, or specific concurrency challenges with context about the app's threading requirements and existing patterns.

Returns

Production-ready Swift concurrency implementations with detailed explanations of actor isolation, cancellation handling, and migration strategies from legacy patterns.

Evidence Policy

Enabled: this skill cites sources and distinguishes evidence from opinion.

swiftconcurrencyasync-awaitactorssendabletask-groupsiosstructured-concurrencyasyncsequencegcd-migrationthread-safetymainactor

Research Foundation: 8 sources (7 official docs, 1 academic)

This skill was developed through independent research and synthesis. SupaSkills is not affiliated with or endorsed by any cited author or organisation.

Version History

v1.0.02/16/2026

Initial release

Works well with

API Design ArchitectPlatinum Code Review ExpertGold Error Handling & Resilience EngineerGold Mobile App Security AuditorPlatinum

Need more depth?

Specialist skills that go deeper in areas this skill touches.

Go Concurrency ArchitectGold Distributed Tracing EngineerGold API Performance Testing ExpertPlatinum

Common Workflows

iOS App Concurrency Migration

Complete migration from legacy concurrency patterns to Swift's structured concurrency with code review and performance validation

swift-concurrency-expert→Code Review Expert→API Performance Testing Expert

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