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# Generated files \[What keltra writes to .keltra]

keltra writes three files into the output folder (`.keltra/` by default). They are regenerated automatically. Don't edit them, and don't commit them.

```text
.keltra/
├── register.d.ts
├── manifest.js
└── manifest.d.ts
```

## register.d.ts

This file is what makes your paths typed. It adds the list of real paths to keltra's `Register` interface, and `assetPath` and `Image` read it.

```ts [.keltra/register.d.ts]
declare module "keltra" {
  interface Register {
    paths: "/images/hero.svg" | "/logo.svg";
  }
}

export {};
```

With no assets, `paths` is `never`, so every path is an error.

Your `tsconfig.json` must include it:

```json [tsconfig.json]
{
  "include": ["src", ".keltra/*.d.ts"]
}
```

:::warning
Use `".keltra/*.d.ts"`. Listing the folder as `".keltra"` loads nothing, because TypeScript skips dot-folders named directly.
:::

## manifest.js and manifest.d.ts

A runtime list of every path, with matching types.

```js [.keltra/manifest.js]
export const paths = ["/images/hero.svg", "/logo.svg"];
```

```ts [.keltra/manifest.d.ts]
export declare const paths: readonly ["/images/hero.svg", "/logo.svg"];
export type AssetPath = (typeof paths)[number];
```

## When files are written

keltra only writes a file when its content changed. That keeps file watchers and hot reload from looping.

## Changing the location

Set [`outDir`](/reference/config#outdir) to write somewhere else. Update your `tsconfig.json` `include` and `.gitignore` to match.