swift-language

Apply modern Swift patterns like generics, protocols, and result builders to non-concurrency code.

Updated Apr 19, 2026

Search Tags:#patterns #swift #coding #regex #type-system #codable

Ready to run

npx skills add https://github.com/femitz/flyby --skill swift-language-femitz

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: swift-language
Source: https://github.com/femitz/flyby/tree/main/.agents/skills/swift-language
Command: npx skills add https://github.com/femitz/flyby --skill swift-language-femitz

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Helps Swift developers write clearer, more maintainable code by leveraging modern language features and patterns across non-concurrency contexts.

Core Features & Use Cases

If/Switch Expressions: use value-returning conditionals to simplify code paths.
Typed Throws & Result Builders: improve error handling and DSL-style APIs.
Property Wrappers, Opaque/Existential Types, Guard Patterns: enable safer abstractions and clearer APIs.
Codable Patterns, Regex Builders, FormatStyle: streamline data encoding/decoding and formatting.
Typical use: implementing core logic for protocols, generics, and performance-oriented utilities.

Quick Start

Suggest a Swift function that uses an if/switch expression to map a status to a string.

Frequently Asked Questions about swift-language

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I use Swift if and switch expressions to return values directly?▼

Swift switch expressions enable value-returning conditionals that simplify code paths. You can map status enums to strings inline without intermediate variables, producing cleaner and more expressive control flow.

What is the best way to handle JSON encoding and decoding with Swift Codable?▼

Swift Codable patterns streamline data encoding and decoding by automatically mapping JSON to native types. You implement Encodable and Decodable to let the compiler synthesize serialization logic for robust data handling.

How do typed throws improve error handling in Swift?▼

Typed throws improve Swift error handling by specifying the exact error type a function can throw. This enables compile-time safety and allows callers to handle specific errors without guessing at runtime types.

When should I use opaque types versus existential types in Swift?▼

Use Swift opaque types to hide concrete types while preserving identity, and existential types when you need dynamic dispatch over heterogeneous values. Opaque types offer better performance, while existentials provide runtime flexibility.

Can I use Swift Regex builders to match complex string patterns?▼

Swift Regex builders allow you to construct complex string matching patterns using a type-safe DSL. You can compose regex patterns programmatically to validate and extract text without raw string literals.

Does this Swift coding skill cover SwiftUI and async concurrency patterns?▼

This skill does not cover SwiftUI or async concurrency. It focuses exclusively on non-concurrency Swift language patterns including generics, protocols, property wrappers, and Codable for core logic implementation.