Skills Guide

Swift 6+ Development Specialist

VerifiedSafe

Specialist in Swift 6+ development for iOS and macOS apps, covering SwiftUI, Combine, and Swift Concurrency. Ideal for building Apple platform applications with modern patterns like @Observable, async/await, and data-race safety.

Download and use
Sby Skills Guide Bot
DevelopmentIntermediate
6/2/2026
Claude Code
#swift#swiftui#ios#macos#combine

Recommended for

Backend developerClaude CodeCode reviewFrontend developerFullstack developerRefactoring

Automated summary

Swift 6+ development specialist covering SwiftUI, Combine, Swift Concurrency, and iOS/macOS patterns.

Strengths

  • Comprehensive coverage of Swift 6 and modern Apple frameworks.
  • Quick references and detailed modules for common patterns.
  • Integration with Context7 libraries for enriched documentation.

Limitations

  • Does not support older Swift versions.
  • Limited to Apple platforms (iOS, macOS).
  • Best utilized within the Claude Code environment.
When to use it

Use this skill when building iOS or macOS applications leveraging the latest Swift and SwiftUI features.

When not to use it

Avoid this skill for non-Apple projects or when working with Swift versions prior to 6.0.

Security analysis

Safe
Quality score90/100

The skill is a documentation and guidance file for Swift development, with no executable code or instructions that could cause harm. The allowed tools (Read, Grep, Glob, context7) are safe and only used for retrieving information.

No concerns found

How this analysis is made

Examples

Create @Observable ViewModel
Create a SwiftUI view using @Observable for a list of items with async loading. Use NavigationStack, .task modifier, and pull-to-refresh.
Implement Thread-Safe Cache Actor
Implement an actor in Swift 6 for a thread-safe cache with get and set methods. Ensure Sendable conformance.

name: do-lang-swift description: > Swift 6+ development specialist covering SwiftUI, Combine, Swift Concurrency, and iOS patterns. Use when building iOS apps, macOS apps, or Apple platform applications. license: Apache-2.0 compatibility: Designed for Claude Code allowed-tools: Read Grep Glob mcp__context7__resolve-library-id mcp__context7__get-library-docs user-invocable: false metadata: version: "2.1.0" category: "language" status: "active" updated: "2026-01-11" modularized: "true" tags: "swift, swiftui, ios, macos, combine, concurrency" context7-libraries: "/apple/swift, /apple/swift-evolution" related-skills: "do-lang-kotlin, do-lang-flutter"

MoAI Extension: Progressive Disclosure

progressive_disclosure: enabled: true level1_tokens: 100 level2_tokens: 5000

MoAI Extension: Triggers

triggers: keywords: ["Swift", "SwiftUI", "Combine", "iOS", "macOS", "async", "await", "Actor", "@Observable", ".swift", "Xcode"] languages: ["swift"]

Swift 6+ Development Specialist

Swift 6.0+ development expert for iOS/macOS with SwiftUI, Combine, and Swift Concurrency.

Auto-Triggers: Swift files (.swift), iOS/macOS projects, Xcode workspaces

Quick Reference

Core Capabilities

  • Swift 6.0: Typed throws, complete concurrency, data-race safety by default
  • SwiftUI 6: @Observable macro, NavigationStack, modern declarative UI
  • Combine: Reactive programming with publishers and subscribers
  • Swift Concurrency: async/await, actors, TaskGroup, isolation
  • XCTest: Unit testing, UI testing, async test support
  • Swift Package Manager: Dependency management

Version Requirements

  • Swift: 6.0+
  • Xcode: 16.0+
  • iOS: 17.0+ (recommended), minimum 15.0
  • macOS: 14.0+ (recommended)

Project Setup

Package.swift Configuration: Begin with swift-tools-version comment set to 6.0. Import PackageDescription. Define let package with Package initializer. Set name, platforms array with .iOS and .macOS minimum versions, products array with library definitions, dependencies array with package URLs and version requirements, and targets array with target and testTarget entries including dependencies.

Essential Patterns

Basic @Observable ViewModel: Import Observation framework. Apply @Observable and @MainActor attributes to final class. Declare private(set) var properties for state. Create async functions that set isLoading true, use defer to set false, and assign fetched data with try? await and nil coalescing.

Basic SwiftUI View: Define struct conforming to View. Declare @State private var for viewModel. In body computed property, use NavigationStack containing List iterating over viewModel items. Add .task modifier calling await on viewModel.load and .refreshable modifier for pull-to-refresh.

Basic Actor for Thread Safety: Define actor type with private dictionary for cache. Create get function returning optional Data for key lookup. Create set function taking key and data parameters for cache storage.

Module Index

Swift 6 Features

modules/swift6-features.md

  • Typed throws for precise error handling
  • Complete concurrency checking
  • Data-race safety by default
  • Sendable conformance requirements

SwiftUI Patterns

modules/swiftui-patterns.md

  • @Observable macro and state management
  • NavigationStack and navigation patterns
  • View lifecycle and .task modifier
  • Environment and dependency injection

Swift Concurrency

modules/concurrency.md

  • async/await fundamentals
  • Actor isolation and @MainActor
  • TaskGroup for parallel execution
  • Custom executors and structured concurrency

Combine Framework

modules/combine-reactive.md

  • Publishers and Subscribers
  • Operators and transformations
  • async/await bridge patterns
  • Integration with SwiftUI

Context7 Library Mappings

Core Swift

  • /apple/swift - Swift language and standard library
  • /apple/swift-evolution - Swift evolution proposals
  • /apple/swift-package-manager - SwiftPM documentation
  • /apple/swift-async-algorithms - Async sequence algorithms

Popular Libraries

  • /Alamofire/Alamofire - HTTP networking
  • /onevcat/Kingfisher - Image downloading and caching
  • /realm/realm-swift - Mobile database
  • /pointfreeco/swift-composable-architecture - TCA architecture
  • /Quick/Quick - BDD testing framework
  • /Quick/Nimble - Matcher framework

Testing Quick Start

Async Test with MainActor: Apply @MainActor attribute to test class extending XCTestCase. Define test function with async throws. Create mock API and set mock data. Initialize system under test with mock. Call await on async method. Use XCTAssertEqual for count verification and XCTAssertFalse for boolean state checks.

Works Well With

  • do-lang-kotlin - Android counterpart for cross-platform projects
  • do-lang-flutter - Flutter/Dart for cross-platform mobile
  • do-domain-backend - API integration and backend communication
  • do-foundation-quality - iOS security best practices
  • do-workflow-testing - Xcode debugging and profiling

Resources

From the file to a first result

The download contains exactly the content displayed on this page. This copy may differ from the latest version in the source repository.

View the source and supporting files

This download contains SKILL.md only. Any scripts, references, templates and dependencies are not included. Get the required files from the source, preserving their directory structure, before continuing.

1. Download the file

Download SKILL.md

From the root of a test project, save the file as .skill-downloads/swift-6-development-specialist-mm5t8a81/SKILL.md, or use the command below. This folder is for inspecting the skill before installation.

Command for macOS/Linux or WSL: requires a POSIX shell and curl. On Windows without WSL, use the download button and create the folder manually.

mkdir -p '.skill-downloads/swift-6-development-specialist-mm5t8a81' && curl --fail --show-error --location 'https://skills-guides.com/api/skills/swift-6-development-specialist-mm5t8a81/download' --output '.skill-downloads/swift-6-development-specialist-mm5t8a81/SKILL.md.part' && mv '.skill-downloads/swift-6-development-specialist-mm5t8a81/SKILL.md.part' '.skill-downloads/swift-6-development-specialist-mm5t8a81/SKILL.md'

2. Check prerequisites

Read SKILL.md before using it. If it references scripts or external services, inspect them and prepare the required access in your test environment.

Environment declared by the author: Designed for Claude Code

Tools declared by the author (check availability in your agent): Read Grep Glob mcp__context7__resolve-library-id mcp__context7__get-library-docs

Original excerpt: Quick Reference

Core Capabilities

  • Swift 6.0: Typed throws, complete concurrency, data-race safety by default
  • SwiftUI 6: @Observable macro, NavigationStack, modern declarative UI
  • Combine: Reactive programming with publishers and subscribers
  • Swift Concurrency: async/await, actors, TaskGroup, isolation
  • XCTest: Unit testing, UI testing, async test support
  • Swift Package Manager: Dependency management

Version Requirements

  • Swift: 6.0+
  • Xcode: 16.0+
  • iOS: 17.0+ (recommended), minimum 15.0
  • macOS: 14.0+ (recommended)

Project Setup

Package.swift Configuration: Begin with swift-tools-version comment set to 6.0. Import PackageDescription. Define let package with Package initializer. Set name, platforms array with .iOS and .macOS minimum versions, products array with library definitions, dependencies array with package URLs and version requirements, and targets array with target and testTarget entries including dependencies.

Essential Patterns

Basic @Observable ViewModel: Import Observation framework. Apply @Observable and @MainActor attributes to final class. Declare private(set) var properties for state. Create async functions that set isLoading true, use defer to set false, and assign fetched data with try? await and nil coalescing.

Basic SwiftUI View: Define struct conforming to View. Declare @State private var for viewModel. In body computed property, use NavigationStack containing List iterating over viewModel items. Add .task modifier calling await on viewModel.load and .refreshable modifier for pull-to-refresh.

Basic Actor for Thread Safety: Define actor type with private dictionary for cache. Create get function returning optional Data for key lookup. Create set function taking key and data parameters for cache storage.

The platforms on this page are catalog indications. The paths below follow tool documentation; they do not prove this skill has been run in those tools. No minimum tool version is confirmed for this listing.

3. Load the skill

After inspection, copy the complete folder into your project using one of the commands below, then open a new tool session. The command stops if a folder with the same name already exists: compare the files before replacing it.

Claude Code
test -f '.skill-downloads/swift-6-development-specialist-mm5t8a81/SKILL.md' && test -s '.skill-downloads/swift-6-development-specialist-mm5t8a81/SKILL.md' && mkdir -p '.claude/skills' && test ! -e '.claude/skills/do-lang-swift' && cp -R '.skill-downloads/swift-6-development-specialist-mm5t8a81' '.claude/skills/do-lang-swift'

OpenSkills

OpenSkills must already be installed. The local install/read procedure is checked with OpenSkills 1.5.0, which requires Node.js ≥ 20.6.0. Catalog slugs are not resolved automatically.

Official OpenSkills installation
openskills install './.skill-downloads/swift-6-development-specialist-mm5t8a81'

openskills read 'swift-6-development-specialist-mm5t8a81'

Reading should display the installed file content and its base directory. It does not run the skill or install its dependencies.

For an agent that reads AGENTS.md, then sync the index. This command changes AGENTS.md: review the diff before using it.

openskills sync

Manual method or another tool: attach SKILL.md to a conversation, or open it in an agent that can read files. Include any required supporting resources. No universal folder is recognized by every tool.

4. Try a first task

Use a short, synthetic input: an API endpoint, a small document or an interface brief. In a new conversation, attach the file or give the agent its path, then adapt this request:

Read .skill-downloads/swift-6-development-specialist-mm5t8a81/SKILL.md and apply its instructions to this example: [describe a test input]. Identify any missing files, dependencies or access. Produce the result requested by the skill without inventing data or running unreviewed scripts.

Expected result: output matching the skill instructions, or a precise list of missing prerequisites. A read confirmation alone does not validate a first use. If an external resource is unavailable, that path remains untested.

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