> ## Documentation Index
> Fetch the complete documentation index at: https://tfts.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# App

> The root construct of a tfts application.

`App` is the root of the construct tree. It represents the entire tfts application and manages the synthesis process.

## Constructor

```typescript theme={null}
new App(config?: AppConfig)
```

### AppConfig

| Property                | Type                  | Description                                            |
| :---------------------- | :-------------------- | :----------------------------------------------------- |
| `outdir`                | `string`              | The directory where synthesized files will be written. |
| `stackTraces`           | `boolean`             | Whether to include stack traces in the output.         |
| `hclOutput`             | `boolean`             | Whether to output HCL instead of JSON.                 |
| `context`               | `Record<string, any>` | Initial context values.                                |
| `skipValidation`        | `boolean`             | Whether to skip resource validation.                   |
| `skipBackendValidation` | `boolean`             | Whether to skip backend validation.                    |

## Properties

### outdir

`readonly outdir: string`
The output directory for synthesized files.

### hclOutput

`readonly hclOutput: boolean`
Whether HCL output is enabled.

### targetStackId

`readonly targetStackId?: string`
The ID of the stack being targeted for synthesis.

### skipValidation

`readonly skipValidation: boolean`
Whether validation is skipped.

### skipBackendValidation

`readonly skipBackendValidation: boolean`
Whether backend validation is skipped.

### manifest

`readonly manifest: Manifest`
The synthesis manifest.

## Methods

### synth()

```typescript theme={null}
synth(): void
```

Synthesizes the application, generating Terraform configurations in the output directory.

### static asApp()

```typescript theme={null}
static asApp(x: any): App
```

Returns the `App` instance if the object is an `App`.

### static of()

```typescript theme={null}
static of(construct: IConstruct): App
```

Returns the `App` instance that contains the given construct.

### crossStackReference()

```typescript theme={null}
crossStackReference(from: TerraformStack, to: TerraformStack, id: string): string
```

Manages references between different stacks.