vitalikpestov/skills-catalog/swift

Swift Development

Swift language-level guidance that applies across all Apple platforms.

When This Skill Activates

Use this skill when the user:

• Asks about Swift concurrency (async/await, actors, Sendable, TaskGroup)
• Needs help with Swift 6 strict concurrency migration
• Has data race or actor isolation errors
• Asks about InlineArray, Span, or low-level memory performance
• Wants to eliminate heap allocations or replace unsafe pointers
• Asks about modern Swift patterns independent of any specific platform

Available Modules

concurrency-patterns/

Swift concurrency architecture and patterns.

• Swift 6.2 approachable concurrency features
• Structured concurrency (async let, TaskGroup, .task modifier)
• Actors, isolation, reentrancy, @MainActor
• Continuations for bridging legacy APIs
• Swift 6 strict concurrency migration guide

memory/

Swift 6.2 InlineArray and Span for low-level memory performance.

• InlineArray: fixed-size, stack-allocated collections with zero heap overhead
• Span family: safe, non-escapable access to contiguous memory
• Lifetime dependencies and non-escapable type constraints
• Performance guidance: when to use InlineArray/Span vs Array/UnsafePointer

How to Use

1. Identify user's need from their question
2. Read relevant module files from subdirectories
3. Apply the guidance to their specific context
4. Cross-reference with platform-specific skills (ios/, macos/) as needed