Because the app has grown beyond a small project, group code by business domain rather than by file type. Introduce layers such as: ```text src/ shared/ # reusable UI, API clients, utilities entities/ # reusable domain data and logic features/ # user-facing actions, e.g. auth/login widgets/ # composed page sections app/ # routing only ``` Create slices with `ui/`, `model/`, `api/`, `lib/`, or `config/` segments and expose each slice through its top-level `index.t...
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# Feature-Sliced restructuring
Because the app has grown beyond a small project, group code by business domain rather than by file type. Introduce layers such as:
```text
src/
shared/ # reusable UI, API clients, utilities
entities/ # reusable domain data and logic
features/ # user-facing actions, e.g. auth/login
widgets/ # composed page sections
app/ # routing only
```
Create slices with `ui/`, `model/`, `api/`, `lib/`, or `config/` segments and expose each slice through its top-level `index.ts`. Enforce imports only downward (`App -> Widgets -> Features -> Entities -> Shared`) and keep `page.tsx` thin. Avoid creating entities until data or logic is genuinely reused across features.
