Where would you want to put modules related to the context of the solution in Sitecore Helix?

In Sitecore Helix architecture, the Project layer is the appropriate place for modules that are closely related to the context of the solution. This layer is tailored for components that are specific to a particular implementation or project. It serves as the highest abstraction level in the Helix architecture and often includes project-specific configurations, services, and functionalities that are not reusable across different projects.

By placing modules in the Project layer, you ensure that they are organized in a way that reflects their specific alignment with the unique requirements and context of the project at hand. This helps maintain clarity in the structure of your solution, allowing easier management and updates as the project evolves.

The Foundation layer is more dedicated to core functionality that is reusable across multiple projects, while the Feature layer is focused on reusable features that can be used independently of the project's specific needs. The Template layer refers to Sitecore items that define the structure of content in the content tree, which is separate from the module organization by functional area. Thus, the Project layer is indeed the best fit for context-specific modules in Sitecore Helix.