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

# Facts

> File measurements emitted alongside every status event. Dimensions are in millimetres.

The `facts` event emits the measurements Filecheck derived from the uploaded file(s), alongside every `status` event. Use it to drive custom logic, or use [Connectors](/element/connectors) to map facts onto page controls without code.

```ts theme={null}
interface IntakeFacts {
  files: Array<{
    id: string | null;
    name: string | null;
    pageCount: number | null;
    width:  number | null;   // mm
    height: number | null;   // mm
    area:   number | null;   // mm²
    orientation: string | null;
    spotColorCount: number;
    usesTransparency: boolean;
  }>;
  aggregate: {
    fileCount: number;
    pageCount: number;       // summed across files
    width:  number | null;   // first file (mm)
    height: number | null;   // first file (mm)
    area:   number | null;   // first file (mm²)
  };
}
```

<Note>
  Dimensions are always millimetres. Multi-file uploads use the **first file** for width/height/area; counts aggregate across all files.
</Note>