In which layer of the OutSystems architecture should the Style Guide module be placed?

The Style Guide module should be placed in the Foundation Layer of the OutSystems architecture because this layer is dedicated to shared resources, common functionalities, and foundational elements that can be reused across different applications within the platform. The Style Guide typically contains reusable UI components, CSS styles, and design patterns that directly support the visual aspects of applications. By placing the Style Guide in the Foundation Layer, it ensures that all applications developed within the environment can consistently access and utilize the same design standards and guidelines, promoting uniformity and efficiency in the development process.

In contrast, the End-User Layer is focused on user-specific elements and interactions. The Core Layer is meant for critical business logic and essential application services, while the Orchestration Layer is responsible for managing data flow and integration between different components and services. None of these layers would be the appropriate place for reusable UI design resources.