---

name: Dependency Injection Setup description: Add new services to DIContainer, create protocol-based implementations, set up singletons or factories for Leavn app dependency injection allowed-tools: Read, Edit, Grep

Dependency Injection Setup

Instructions

Add new services to Leavn's DIContainer:

1. Create service protocol:

   Copy// Services/MyDomain/MyServiceProtocol.swift
   public protocol MyServiceProtocol {
       func doSomething() async throws -> Result
   }
   

2. Create implementation:

   Copy// Services/MyDomain/MyServiceLive.swift
   public final class MyServiceLive: MyServiceProtocol {
       public init() { }
   
       public func doSomething() async throws -> Result {
           // Implementation
       }
   }
   

3. Register in DIContainer:

   Copy// For singletons (stateful services):
   private lazy var _myService = MyServiceLive()
   var myService: MyServiceProtocol {
       _myService
   }
   
   // For factories (stateless services):
   var myService: MyServiceProtocol {
       MyServiceLive()
   }
   

4. Use in ViewModels:

   Copylet service = DIContainer.shared.myService
   

Use this skill when: Creating new service, adding dependency, setting up DI, refactoring to protocol-oriented design