swift-language

Apply modern Swift 6.3+ patterns to non-concurrency Swift code.

Updated Aug 23, 2026
One-click install
npx skills add https://github.com/KumarAdi8/AgentKit --skill swift-language-kumaradi8
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: swift-language
Source: https://github.com/KumarAdi8/AgentKit/tree/main/skills/swift-language
Command: npx skills add https://github.com/KumarAdi8/AgentKit --skill swift-language-kumaradi8

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Applies modern Swift language patterns and idioms to reduce unidiomatic, error-prone, or legacy core Swift code and make implementations clearer, safer, and more maintainable. It addresses common pitfalls such as incorrect Codable handling, inefficient collection usage, unclear type abstraction between opaque and existential types, and inconsistent formatting or regex usage.

Core Features & Use Cases

  • Language pattern guidance: If/switch expressions, guard patterns, Never type, typed throws, and advice on when to use some versus any to improve performance and API clarity.
  • APIs and parsing: Codable best practices, nested container decoding, loss-tolerant arrays, RegexBuilder patterns, and FormatStyle for dates, numbers, measurements, and lists.
  • Developer workflows: Use when implementing or reviewing core library code, decoding JSON APIs, designing generic APIs with opaque/existential types, or migrating legacy formatting/regex logic.
  • Real-world example: Refactor a network model decoding pipeline to use custom CodingKeys, decodeIfPresent with sensible defaults, apply FormatStyle for presentation, and replace manual loops with modern collection APIs.

Quick Start

Ask the assistant to refactor a function or type to use typed throws, proper Codable CodingKeys with decodeIfPresent defaults, and .formatted() for dates to produce idiomatic Swift 6 code.

Frequently Asked Questions about swift-language

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

FAQPage Schema
How do I refactor Codable to use custom CodingKeys and decodeIfPresent in Swift?

Improve Swift Codable robustness by defining custom CodingKeys and applying decodeIfPresent with sensible defaults to handle missing or optional JSON fields gracefully without throwing errors.

What is the difference between some and any in Swift generic APIs?

Use some for opaque types to preserve specific types and improve performance, while any creates existential types for dynamic polymorphism, balancing API clarity and flexibility.

How do I use RegexBuilder and FormatStyle to modernize legacy Swift code?

Modernize Swift string parsing and formatting by replacing legacy logic with RegexBuilder for pattern matching and FormatStyle for localized presentation of dates, numbers, measurements, and lists.

Can I use typed throws in Swift to improve error handling clarity?

Apply Swift typed throws to specify exact error types at the function signature level, improving API contracts and enabling safer catch blocks without opaque error handling.

Does this Swift refactoring guidance apply to SwiftUI views?

No, this guidance targets non-SwiftUI contexts, focusing on core Swift tasks like generics, enums, property wrappers, Codable, RegexBuilder, and collection APIs.