[Documentation](https://fluxnative.app/docs) / Build your app

# App structure

See every screen the assistant planned and built, how they connect, and which ones failed to open, in the App tab.

![The App tab: the Today, Habit and Stats screens, the navigation tree and the app's journeys, beside the preview](https://fluxnative.app/guide-media/app-structure.86c2e960.webp)

App lists every screen, the navigation tree and the journeys; click a screen to open it.

## Steps

1. Open **App** in the project panel.
2. Click a built screen to open it in the preview. Greyed-out screens are planned but not built yet.
3. Check the navigation tree for tabs and stacks, and the journeys for their last walk.
4. Ask the assistant to fix a screen with a warning mark, or to build a planned one.

## Warning marks

After a build the assistant opens every screen once. A failed one reads **Crashes on open**, **Opens blank**, **Stops responding**, **Page crashed** or **Not found**; hover it for the error.

## Good to know

- A journey reads **Walk passed**, **Walk failed at step N**, **Walk skipped** or **No walk run yet**. A walk is a saved run the assistant replays after changes.
- Screens are disabled while the assistant works. A screen that needs a record, such as a detail page, opens once the app has shown one.
- Click a shared component to open its file in **Code**.

## When plan and source disagree

After a turn, a warning lists what the plan and the source disagree on. Ask the assistant to reconcile it:

`The plan lists a Settings screen that doesn't exist. Build it and link it from Profile.`

## Related

[Preview](https://fluxnative.app/docs/preview) · [Checks](https://fluxnative.app/docs/checks)

Previous: [Preview](https://fluxnative.app/docs/preview) · Next: [Design tokens](https://fluxnative.app/docs/design-tokens)

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See every screen the assistant planned and built, how they connect, and which ones failed to open, in the App tab.

Page: https://fluxnative.app/docs/app-structure