How does this skill help with ARC traffic?

By applying explicit ownership modifiers, the skill identifies opportunities to eliminate redundant retain and release operations that can aggregate into significant performance bottlenecks.

What are ~Copyable types?

These are noncopyable types in Swift that require explicit ownership management, ensuring a resource has exactly one owner at any given time to prevent accidental duplication.

When should I use borrowing instead of the default behavior?

Use borrowing for large value types being passed read-only to avoid unnecessary copies, or when you need to reduce ARC traffic for reference types in performance-sensitive code.

Is this skill restricted to iOS development?

While the repository focuses on xOS (iOS, iPadOS, watchOS, tvOS), these Swift ownership patterns are applicable to any modern Swift project, including server-side or macOS development.

Axiom Swift Ownership Conventions

Name: Axiom Swift Ownership Conventions
Author: CharlesWiltgen

byCharlesWiltgen

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233

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Mobile Development

Optimizes Swift code performance using explicit ownership modifiers like borrowing, consuming, and noncopyable types.

This skill provides specialized guidance for implementing Swift's ownership model to enhance performance in modern xOS development. It helps developers manage memory more efficiently by reducing ARC traffic, handling large value types without unnecessary copies, and implementing noncopyable types (~Copyable). It is particularly useful for performance-critical sections of code where micro-optimizations significantly impact the user experience across iOS, iPadOS, watchOS, and tvOS applications.

Key Features

01233 GitHub stars

02Minimizes ARC retain/release traffic

03Implements borrowing and consuming parameter modifiers

04Provides clear decision trees for ownership modifier application

05Optimizes large value type performance by reducing copies

06Supports ~Copyable (noncopyable) type patterns

Use Cases

01Managing resource-heavy objects like file handles using noncopyable types

02Reducing memory overhead when passing large structs in performance-critical loops

03Tuning factory methods that consume builder objects to prevent post-build usage

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add charleswiltgen/axiom axiom-ownership-conventions

For use in Claude.ai and ChatGPT

Download Skill