# Out

`out` is where `okm build` writes the catalog.

| Field | Required | Default | Role |
| --- | --- | --- | --- |
| `out` | no | `.okm` | Build output. |

```ts title="okmodel.config.ts"
import { defineConfig } from "okmodel/migrate";

export default defineConfig({
  schema: "./schema.ts",
  out: "./.okm", // [!code focus]
  database: process.env.DATABASE_URL!,
});
```

Omit `out` and the directory is `.okm`. The directory is created when it is missing. A relative path is resolved from the project directory. An absolute path stays absolute.

`okm build` writes `catalog.json`, `catalog.hash`, and `types.d.ts`. `catalog.hash` is the SHA-256 of `catalog.json`. `types.d.ts` is the row types. `okm generate` writes the same three files.