Where do you put domain models in a Flutter project structure?

Short answer

Put domain models in the domain layer when data and UI use them, and keep them separate from API models so the app's shape stays independent of the transport.

Explanation

Flutter's guide puts models under domain, while repositories transform raw data into the shape the view models need. Do not put external DTOs in the UI just because they are ready.

Common mistakes

• Making the API's model a permanent UI contract.
• Copying a model in every layer with no mapping or clear reason.

Follow-up questions

• What are the boundaries of the presentation, domain, and data layers?

Sources

• Flutter docs — Architecture case study