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

> ## Agent Instructions
> Automate.ax automations are TypeScript programs.
> Use Bun for installation and command examples.
> Use Automate.ax for the product name and automate.ax for the package, CLI, and domain.
> Treat documented public APIs as current; do not invent transitional or deprecated names.

# Replace library file

> Replace the content of a CloseBot library file.

`closeBot.replaceLibraryFile` replaces file content while retaining the CloseBot file ID.

```ts automations/replace-closebot-library-file.automation.ts theme={null}
import { automation, onDashboardRun } from "automate.ax"
import { closeBot } from "automate.ax/closebot"

export default automation("Replace CloseBot library file", () => {
  onDashboardRun({ title: "Replace library file" })
  closeBot.replaceLibraryFile({
    fileId: "file-id",
    file: new File(["Updated product guidance."], "guidance.txt", {
      type: "text/plain",
    }),
  })
})
```

## Inputs

Provide `fileId` and the replacement JavaScript `File`.

## Output

Returns `{ id: string }` with the retained library file ID.