Swift style guidelines cover naming conventions, access control, type selection, and code organization patterns that make your code more readable and professional.

Available References

Naming & Conventions

[Variables and Constants](./references/variables.md) - var vs let, naming conventions, immutability
[Functions](./references/functions.md) - Function naming, parameter labels, return types

Types & Protocols

[Types](./references/types.md) - Struct vs Class vs Enum, value vs reference semantics
[Protocols](./references/protocols.md) - Protocol-Oriented Programming (POP), composition, extensions

Code Organization

[Access Control](./references/access_control.md) - public, private, internal, fileprivate, open

Quick Reference

Naming Conventions

Category	Case	Example
Types & Protocols	UpperCamelCase	`String`, `UIViewController`
Variables, Functions	lowerCamelCase	`userID`, `fetchData()`
Boolean Properties	`is`, `has`, `should`	`isEmpty`, `hasPermission`
Constants	lowerCamelCase	`maxConnections`

Type Selection Guide

Need identity or reference semantics?
├── YES → Use Class
└── NO → Need inheritance?
    ├── YES → Use Class
    └── NO → Modeling finite states?
        ├── YES → Use Enum
        └── NO → Use Struct (default)

Access Levels

Modifier	Visibility	Use When
`private`	Enclosing declaration	Strict encapsulation
`fileprivate`	Same file	File-local helpers
`internal` (default)	Same module	Implementation details
`public`	Everywhere	Public API
`open`	Everywhere + subclassable	Extensible frameworks

Best Practices

Default to structs - Use simplest type that expresses intent
Use let by default - Only use var when mutation needed
Prefer protocols over inheritance - More flexible composition
Keep functions focused - Single responsibility
Use access control - Expose only what's necessary
Follow naming conventions - Descriptive, Swifty names

For More Information

Each reference file contains detailed information, code examples, and best practices for specific topics. Visit https://swiftzilla.dev for comprehensive Swift documentation.

npx skills add swiftzilla/skills --skill swift_style