graph TB
    subgraph Bootstrap ["BOOTSTRAP"]
        CommonAPI[common-api-app<br/>Controller → Facade]
        API[skeleton-api-app]
        Worker[skeleton-worker-app]
    end

    subgraph CommonWeb ["COMMON-WEB"]
        Filters[Filters, Interceptors]
        Handler[ExceptionHandler, ApiResource]
    end

    subgraph DomainLayer ["DOMAIN"]
        App[Application<br/>Query / Command]
        Svc[Service<br/>Business Logic]
        Repo[Repository<br/>JPA + QueryDSL]
    end

    subgraph Infra ["INFRASTRUCTURE"]
        Config[JPA Config, QueryDSL Config]
        Cache[Cache, Redis, RestClient]
        Export[Export, Slack]
    end

    subgraph Common ["COMMON"]
        Utils[Codes, Exceptions, Utils, Extensions, Values]
    end

    CommonAPI --> CommonWeb
    CommonAPI --> Infra
    CommonAPI --> DomainLayer
    API --> CommonWeb
    API --> Infra
    Worker --> CommonWeb
    Worker --> Infra
    CommonWeb --> Common
    App --> Svc
    Svc --> Repo
    Infra --> DomainLayer
    DomainLayer --> Common
    Infra --> Common

modules/
├── common/                     # Common utilities, exceptions, codes, value objects
├── common-web/                 # Web common (Filter, Interceptor, Handler)
├── test-support/               # Test fixtures, REST Docs support
├── domain/                     # Domain models, business rules, JPA Entity, Repository
├── infrastructure/             # Config, Cache, HTTP Client, external services
├── bootstrap/                  # Spring Boot app modules
│   ├── common-api-app/         # Common API server (Controller, Facade)
│   ├── skeleton-api-app/       # API server
│   └── skeleton-worker-app/    # Worker server
└── docs/                       # REST Docs document generation

graph TD
    CommonAPI[common-api-app] --> CW[common-web]
    CommonAPI --> DOMAIN[domain]
    CommonAPI --> INFRA[infrastructure]

    API[skeleton-api-app] --> CW
    API --> INFRA
    API --> DOMAIN

    Worker[skeleton-worker-app] --> CW
    Worker --> INFRA
    Worker --> DOMAIN

    INFRA --> DOMAIN
    INFRA --> COMMON[common]
    DOMAIN --> COMMON
    CW --> COMMON

    style COMMON fill:#e1f5fe
    style INFRA fill:#fff3e0
    style CW fill:#f3e5f5
    style DOMAIN fill:#e8f5e9
    style CommonAPI fill:#ffebee
    style API fill:#ffebee
    style Worker fill:#ffebee

Controller (bootstrap) → Facade (bootstrap)
  → QueryApplication / CommandApplication (domain)
    → Service (domain)
      → JpaRepository / QueryRepository (domain)

com.myrealtrip.domain.{feature}/
├── dto/
│   ├── {Feature}Info.kt               # Domain DTO
│   ├── Create{Feature}Request.kt      # Domain create request
│   └── {Feature}NotFoundException.kt  # Domain exception
├── entity/
│   └── {Feature}.kt                   # JPA Entity
├── repository/
│   ├── {Feature}JpaRepository.kt      # Spring Data JPA
│   └── {Feature}QueryRepository.kt    # QueryDSL repository
├── service/
│   └── {Feature}Service.kt            # Business logic
└── application/
    ├── {Feature}QueryApplication.kt   # Query use cases
    └── {Feature}CommandApplication.kt # Command use cases

com.myrealtrip.{appname}/
├── api/                # Controllers
├── dto/
│   ├── request/        # API request DTOs
│   └── response/       # API response DTOs
├── facade/             # Facade (DTO conversion + orchestration)
└── config/             # Configuration classes

modules/domain/src/main/kotlin/com/myrealtrip/domain/myfeature/
├── dto/
│   ├── MyFeatureInfo.kt               # Domain DTO
│   └── CreateMyFeatureRequest.kt      # Domain request
├── entity/
│   └── MyFeature.kt                   # JPA Entity
├── repository/
│   ├── MyFeatureJpaRepository.kt      # Spring Data JPA
│   └── MyFeatureQueryRepository.kt    # QueryDSL repository
├── service/
│   └── MyFeatureService.kt            # Business logic
└── application/
    ├── MyFeatureQueryApplication.kt   # Query use cases
    └── MyFeatureCommandApplication.kt # Command use cases

modules/bootstrap/my-api-app/
├── build.gradle.kts
└── src/main/kotlin/com/myrealtrip/myapiapp/
    ├── api/
    │   └── MyController.kt
    ├── dto/
    │   ├── request/
    │   │   └── MyApiRequest.kt
    │   └── response/
    │       └── MyApiResponse.kt
    ├── facade/
    │   └── MyFacade.kt
    ├── config/
    │   └── AppConfig.kt
    └── MyApiApplication.kt

@HttpExchange("/todos")
interface TodoClient {
    @GetExchange
    fun findAll(): List<TodoDto>

    @GetExchange("/{id}")
    fun findById(@PathVariable id: Int): TodoDto

    @PostExchange
    fun create(@RequestBody todo: TodoDto): TodoDto
}

@Configuration
@ImportHttpServices(group = "mygroup", types = [TodoClient::class])
class TodoClientConfig {

    @Bean
    fun todoClientGroupConfigurer(): RestClientHttpServiceGroupConfigurer {
        return RestClientHttpServiceGroupConfigurer { groups ->
            groups.filterByName("mygroup")
                .forEachClient { _, builder ->
                    builder.baseUrl("https://api.example.com")
                        .requestInterceptor(HttpLoggingInterceptor("TodoClient"))
                }
        }
    }
}

@GetMapping("/{id}")
fun findById(@PathVariable id: Int): ApiResource<Todo> {
    return ApiResource.success(todoService.findById(id))
}

{
  "status": {
    "status": 200,
    "code": "SUCCESS",
    "message": "Operation successful"
  },
  "meta": {
    "size": 1
  },
  "data": { ... }
}

class TodoNotFoundException(id: Int) : KnownException(
    ErrorCode.DATA_NOT_FOUND,
    "Todo not found: $id"
)