Koin Annotations Inventory

This document provides a comprehensive inventory of all Koin annotations, their parameters, behaviors, and usage examples.

Definition Annotations
- @Single
- @Factory
- @Scoped
Scope Annotations
ViewModel & Android-Specific Annotations
- @KoinViewModel
- @KoinWorker
Qualifier Annotations
- @Named
- @Qualifier
Property Annotations
- @Property
- @PropertyValue
Module & Application Annotations
Monitoring Annotations
- @Monitor
Meta Annotations (Internal)

Definition Annotations

@Single

Package: org.koin.core.annotation

Target: CLASS, FUNCTION

Description: Declares a type or function as a single (singleton) definition in Koin. A single instance is created and shared across the application.

Parameters:

binds: Array<KClass<*>> = [Unit::class] - Explicit types to bind to this definition. Supertypes are automatically detected.
createdAtStart: Boolean = false - If true, the instance is created when Koin starts.

Behavior: All dependencies are filled by constructor injection.

Example:

kotlin

@Single
class MyClass(val d : MyDependency)

Generated Koin DSL:

kotlin

single { MyClass(get()) }

With explicit binding:

kotlin

@Single(binds = [MyInterface::class])
class MyClass(val d : MyDependency) : MyInterface

With creation at start:

kotlin

@Single(createdAtStart = true)
class MyClass(val d : MyDependency)

@Factory

Package: org.koin.core.annotation

Target: CLASS, FUNCTION

Description: Declares a type or function as a factory definition in Koin. A new instance is created each time it is requested.

Parameters:

binds: Array<KClass<*>> = [Unit::class] - Explicit types to bind to this definition. Supertypes are automatically detected.

Behavior: All dependencies are filled by constructor injection. Each request creates a new instance.

Example:

kotlin

@Factory
class MyClass(val d : MyDependency)

Generated Koin DSL:

kotlin

factory { MyClass(get()) }

@Scoped

Package: org.koin.core.annotation

Target: CLASS, FUNCTION

Description: Declares a type or function as a scoped definition in Koin. Must be associated with @Scope annotation. Instance is shared within a specific scope.

Parameters:

binds: Array<KClass<*>> = [Unit::class] - Explicit types to bind to this definition. Supertypes are automatically detected.

Behavior: Creates a scoped instance that lives within the defined scope's lifetime.

Example:

kotlin

@Scope(MyScope::class)
@Scoped
class MyClass(val d : MyDependency)

See Also: @Scope

Scope Annotations

@Scope

Package: org.koin.core.annotation

Target: CLASS, FUNCTION

Description: Declares a class in a Koin scope. Scope name is described by either value (class) or name (string). By default, declares a scoped definition. Can be overridden with @Scoped, @Factory, @KoinViewModel annotations for explicit bindings.

Parameters:

value: KClass<*> = Unit::class - Scope class value
name: String = "" - Scope string value

Behavior: Creates a scope definition associated with the specified scope type or name.

Example with class:

kotlin

@Scope(MyScope::class)
class MyClass(val d : MyDependency)

Generated Koin DSL:

kotlin

scope<MyScope> {
    scoped { MyClass(get()) }
}

Example with string name:

kotlin

@Scope(name = "my_custom_scope")
class MyClass(val d : MyDependency)

@ViewModelScope

Package: org.koin.core.annotation

Target: CLASS, FUNCTION

Description: Declares a class in a ViewModelScope Koin scope. This is a scope archetype for components that should live within a ViewModel's lifecycle.

Parameters: None

Behavior: Creates a scoped definition within the viewModelScope.

Example:

kotlin

@ViewModelScope
class MyClass(val d : MyDependency)

Generated Koin DSL:

kotlin

viewModelScope {
    scoped { MyClass(get()) }
}

Usage: The tagged class is meant to be used with ViewModel and viewModelScope function to activate the scope.

@ActivityScope

Package: org.koin.android.annotation

Target: CLASS, FUNCTION

Description: Declares a class in an Activity Koin Scope.

Parameters: None

Behavior: Creates a scoped definition within the activityScope.

Example:

kotlin

@ActivityScope
class MyClass(val d : MyDependency)

Generated Koin DSL:

kotlin

activityScope {
    scoped { MyClass(get()) }
}

Usage: The tagged class is meant to be used with Activity and activityScope function to activate the scope.

@ActivityRetainedScope

Package: org.koin.android.annotation

Target: CLASS, FUNCTION

Description: Declares a class in an Activity Koin scope, but retained across configuration changes.

Parameters: None

Behavior: Creates a scoped definition within the activityRetainedScope.

Example:

kotlin

@ActivityRetainedScope
class MyClass(val d : MyDependency)

Generated Koin DSL:

kotlin

activityRetainedScope {
    scoped { MyClass(get()) }
}

Usage: The tagged class is meant to be used with Activity and activityRetainedScope function to activate the scope.

@FragmentScope

Package: org.koin.android.annotation

Target: CLASS, FUNCTION

Description: Declares a class in a Fragment Koin scope.

Parameters: None

Behavior: Creates a scoped definition within the fragmentScope.

Example:

kotlin

@FragmentScope
class MyClass(val d : MyDependency)

Generated Koin DSL:

kotlin

fragmentScope {
    scoped { MyClass(get()) }
}

Usage: The tagged class is meant to be used with Fragment and fragmentScope function to activate the scope.

@ScopeId

Package: org.koin.core.annotation

Target: VALUE_PARAMETER

Description: Annotates a parameter from class constructor or function to request resolution for a given scope with Scope ID.

Parameters:

value: KClass<*> = Unit::class - Scope type
name: String = "" - Scope string identifier

Behavior: Resolves the dependency from a specific scope identified by type or name.

Example with string name:

kotlin

@Factory
class MyClass(@ScopeId(name = "my_scope_id") val d : MyDependency)

Generated Koin DSL:

kotlin

factory { MyClass(getScope("my_scope_id").get()) }

Example with type:

kotlin

@Factory
class MyClass(@ScopeId(MyScope::class) val d : MyDependency)

ViewModel & Android-Specific Annotations

@KoinViewModel

Package: org.koin.android.annotation

Target: CLASS, FUNCTION

Description: ViewModel annotation for Koin definition. Declares a type or function as a viewModel definition in Koin.

Platform Support:

✅ Android
✅ Kotlin Multiplatform (KMP)
✅ Compose Multiplatform (CMP)

Parameters:

binds: Array<KClass<*>> = [] - Explicit types to bind to this definition. Supertypes are automatically detected.

Behavior: All dependencies are filled by constructor injection. Creates a ViewModel instance managed by Koin. Works across all platforms including Android, iOS, Desktop, and Web when using Compose Multiplatform.

Example (Android/CMP):

kotlin

@KoinViewModel
class MyViewModel(val d : MyDependency) : ViewModel()

Example (KMP/CMP shared):

kotlin

@KoinViewModel
class SharedViewModel(
    val repository: Repository,
    val analytics: Analytics
) : ViewModel()

Generated Koin DSL:

kotlin

viewModel { MyViewModel(get()) }

@KoinWorker

Package: org.koin.android.annotation

Target: CLASS, FUNCTION

Description: Worker annotation for Koin Definition. Declares a type as a worker definition for WorkManager workers.

Parameters:

binds: Array<KClass<*>> = [] - Explicit types to bind to this definition.

Behavior: Creates a worker definition for Android WorkManager integration.

Example:

kotlin

@KoinWorker
class MyWorker() : Worker()

Qualifier Annotations

@Named

Package: org.koin.core.annotation

Target: CLASS, FUNCTION, VALUE_PARAMETER

Description: Defines a qualifier for a given definition. Generates StringQualifier("...") or type-based qualifier.

Parameters:

value: String = "" - String qualifier
type: KClass<*> = Unit::class - Class qualifier

Behavior: Used to distinguish between multiple definitions of the same type.

Example with string:

kotlin

@Single
@Named("special")
class MyClass(val d : MyDependency)

Usage in parameter:

kotlin

@Single
class Consumer(@Named("special") val myClass: MyClass)

Example with type:

kotlin

@Single
@Named(type = MyType::class)
class MyClass(val d : MyDependency)

@Qualifier

Package: org.koin.core.annotation

Target: CLASS, FUNCTION, VALUE_PARAMETER

Description: Defines a qualifier for a given definition. Similar to @Named but with reversed parameter priority.

Parameters:

value: KClass<*> = Unit::class - Class qualifier
name: String = "" - String qualifier

Behavior: Used to distinguish between multiple definitions of the same type.

Example:

kotlin

@Single
@Qualifier(name = "special")
class MyClass(val d : MyDependency)

Property Annotations

@Property

Package: org.koin.core.annotation

Target: VALUE_PARAMETER

Description: Annotates a constructor parameter or function parameter to resolve as a Koin property.

Parameters:

value: String - Property name

Behavior: Resolves the parameter value from Koin properties instead of dependency injection.

Example:

kotlin

@Factory
class MyClass(@Property("name") val name : String)

Generated Koin DSL:

kotlin

factory { MyClass(getProperty("name")) }

With default value:

kotlin

@PropertyValue("name")
val defaultName = "MyName"

@Factory
class MyClass(@Property("name") val name : String)

Generated Koin DSL:

kotlin

factory { MyClass(getProperty("name", defaultName)) }

@PropertyValue

Package: org.koin.core.annotation

Target: FIELD

Description: Annotates a field value that will be a Property default value.

Parameters:

value: String - Property name

Behavior: Defines a default value for a property that can be used when the property is not found.

Example:

kotlin

@PropertyValue("name")
val defaultName = "MyName"

@Factory
class MyClass(@Property("name") val name : String)

Generated Koin DSL:

kotlin

factory { MyClass(getProperty("name", defaultName)) }

Module & Application Annotations

@Module

Package: org.koin.core.annotation

Target: CLASS

Description: Class annotation to help gather definitions inside a Koin module. Each function can be annotated with a Koin definition annotation.

Parameters:

includes: Array<KClass<*>> = [] - Module classes to include
createdAtStart: Boolean = false - If true, module instances are created at start

Behavior: Gathers all annotated functions and classes within the module.

Example:

kotlin

@Module
class MyModule {
    @Single
    fun myClass(d : MyDependency) = MyClass(d)
}

Generated Koin DSL:

kotlin

val MyModule.module = module {
    val moduleInstance = MyModule()
    single { moduleInstance.myClass(get()) }
}

With includes:

kotlin

@Module(includes = [OtherModule::class])
class MyModule {
    // definitions
}

@ComponentScan

Package: org.koin.core.annotation

Target: CLASS, FIELD

Description: Gathers definitions declared with Koin definition annotations. Scans current package or explicit package names.

Parameters:

value: vararg String = [] - Packages to scan (supports glob patterns)

Behavior: Scans specified packages for annotated classes. Supports both exact package names and glob patterns.

Glob Pattern Support:

Exact package names (no wildcards):
- com.example.service - Scans package and all subpackages (equivalent to com.example**)
Multi-level scan including root:
- com.example** - Scans com.example and all subpackages
Multi-level scan excluding root:
- com.example.** - Scans only subpackages of com.example, excludes root
Single-level wildcard:
- com.example.*.service - Matches exactly one level (e.g., com.example.user.service)
Combined wildcards:
- com.**.service.*data - Complex pattern matching
- com.*.service.** - Scans subpackages under pattern

Example - scan current package:

kotlin

@ComponentScan
class MyApp

Example - scan specific packages:

kotlin

@ComponentScan("com.example.services", "com.example.repositories")
class MyApp

Example - with glob patterns:

kotlin

@ComponentScan("com.example.**", "org.app.*.services")
class MyApp

@Configuration

Package: org.koin.core.annotation

Target: CLASS, FIELD

Description: Applied to @Module class to associate it with one or more configurations (tags/flavors).

Parameters:

value: vararg String = [] - Configuration names

Behavior: Modules can be grouped into configurations for conditional loading.

Default Configuration:

kotlin

@Module
@Configuration
class MyModule

This module is part of the "default" configuration.

Multiple Configurations:

kotlin

@Module
@Configuration("prod", "test")
class MyModule

This module is available in both "prod" and "test" configurations.

With Default:

kotlin

@Module
@Configuration("default", "test")
class MyModule

Available in default and test configurations.

Note: @Configuration("default") is equivalent to @Configuration

@KoinApplication

Package: org.koin.core.annotation

Target: CLASS

Description: Tags a class as a Koin application entry point. Generates Koin application bootstrap with startKoin() or koinApplication() functions.

Parameters:

configurations: Array<String> = [] - List of configuration names to scan
modules: Array<KClass<*>> = [Unit::class] - List of modules to load besides configurations

Behavior: Generates bootstrap functions that scan for configurations and included modules.

Example - default configuration:

kotlin

@KoinApplication
class MyApp

Generated functions:

kotlin

MyApp.startKoin()
MyApp.koinApplication()

Example - specific configurations:

kotlin

@KoinApplication(configurations = ["default", "prod"])
class MyApp

Example - with modules:

kotlin

@KoinApplication(
    configurations = ["default"],
    modules = [CoreModule::class, ApiModule::class]
)
class MyApp

Usage with custom configuration:

kotlin

MyApp.startKoin {
    printLogger()
    // additional configuration
}

Monitoring Annotations

@Monitor

Package: org.koin.core.annotation

Target: CLASS, FUNCTION

Description: Marks a class or function for automatic monitoring and performance tracing through Kotzilla Platform, the official tooling platform for Koin.

Parameters: None

Behavior:

When applied to a class: Generates a Koin proxy that monitors all public method calls
When applied to a function: Monitors that specific method within a Koin-managed component
Automatically captures performance metrics, error rates, and usage patterns
Sends data to Kotzilla workspace for real-time analysis

Requirements:

implementation 'io.kotzilla:kotzilla-core:latest.version'
Valid Kotzilla Platform account and API key

Example:

kotlin

@Monitor
class UserService(private val userRepository: UserRepository) {
    fun findUser(id: String): User? = userRepository.findById(id)
}

Resources:

Since: Kotzilla 1.2.1

Meta Annotations (Internal)

These annotations are for internal use only by the Koin compiler and code generation.

@ExternalDefinition

Package: org.koin.meta.annotations

Target: CLASS, FIELD, FUNCTION

Description: Internal usage for components discovery in generated package.

Parameters:

value: String = "" - Package of declared definition

@MetaDefinition

Package: org.koin.meta.annotations

Target: CLASS, FUNCTION, PROPERTY

Description: Meta Definition annotation to help represent definition metadata.

Parameters:

value: String = "" - Definition full path
moduleTagId: String = "" - Module Tag + ID (format: "module_id:module_tag")
dependencies: Array<String> = [] - Parameters tags to check
binds: Array<String> = [] - Bound types
qualifier: String = "" - Qualifier
scope: String = "" - Scope where it's declared

@MetaModule

Package: org.koin.meta.annotations

Target: CLASS

Description: Meta Module annotation to help represent module metadata.

Parameters:

value: String = "" - Module full path
id: String = "" - Module ID
includes: Array<String> = [] - Includes Module Tags to check
configurations: Array<String> = [] - Module Configurations to check
isObject: Boolean = false - Whether the module is an object

@MetaApplication

Package: org.koin.meta.annotations

Target: CLASS

Description: Meta Application annotation to help represent application metadata.

Parameters:

value: String = "" - Application full path
includes: Array<String> = [] - Used Module Tags to check
configurations: Array<String> = [] - Used Configurations modules to check

Deprecated Annotations

@Singleton

Package: org.koin.core.annotation

Status: DEPRECATED - ERROR level

Replacement: Use @Singleton from koin-jsr330 package instead

Description: Same as @Single but deprecated in favor of JSR-330 compliance.

Summary Table

Annotation	Package	Purpose	Common Use Case
`@Single`	`org.koin.core.annotation`	Singleton definition	Shared application services
`@Factory`	`org.koin.core.annotation`	Factory definition	Per-request instances
`@Scoped`	`org.koin.core.annotation`	Scoped definition	Scope-specific instances
`@Scope`	`org.koin.core.annotation`	Scope declaration	Custom scopes
`@ViewModelScope`	`org.koin.core.annotation`	ViewModel scope	ViewModel-scoped dependencies
`@ActivityScope`	`org.koin.android.annotation`	Activity scope	Activity-scoped dependencies
`@ActivityRetainedScope`	`org.koin.android.annotation`	Retained activity scope	Config-change surviving deps
`@FragmentScope`	`org.koin.android.annotation`	Fragment scope	Fragment-scoped dependencies
`@ScopeId`	`org.koin.core.annotation`	Scope resolution	Resolve from specific scope
`@KoinViewModel`	`org.koin.android.annotation`	ViewModel definition	Android/KMP/CMP ViewModels
`@KoinWorker`	`org.koin.android.annotation`	Worker definition	WorkManager workers
`@Named`	`org.koin.core.annotation`	String/type qualifier	Distinguish same-type beans
`@Qualifier`	`org.koin.core.annotation`	Type/string qualifier	Distinguish same-type beans
`@Property`	`org.koin.core.annotation`	Property injection	Configuration values
`@PropertyValue`	`org.koin.core.annotation`	Property default	Default config values
`@Module`	`org.koin.core.annotation`	Module declaration	Group definitions
`@ComponentScan`	`org.koin.core.annotation`	Package scanning	Auto-discover definitions
`@Configuration`	`org.koin.core.annotation`	Module configuration	Build variants/flavors
`@KoinApplication`	`org.koin.core.annotation`	App entry point	Bootstrap Koin
`@Monitor`	`org.koin.core.annotation`	Performance monitoring	Production monitoring

Document Version: 1.0 Last Updated: 20-10-2025 Koin Annotations Version: 2.2.x+

Koin Annotations Inventory

Koin Annotations Inventory

Table of Contents

Definition Annotations

@Single

@Factory

@Scoped

Scope Annotations

@Scope

@ViewModelScope

@ActivityScope

@ActivityRetainedScope

@FragmentScope

@ScopeId

ViewModel & Android-Specific Annotations

@KoinViewModel

@KoinWorker

Qualifier Annotations

@Named

@Qualifier

Property Annotations

@Property

@PropertyValue

Module & Application Annotations

@Module

@ComponentScan

@Configuration

@KoinApplication

Monitoring Annotations

@Monitor

Meta Annotations (Internal)

@ExternalDefinition

@MetaDefinition

@MetaModule

@MetaApplication

Deprecated Annotations

@Singleton

Summary Table