# @changesets/pre
[](https://npmjs.com/package/@changesets/pre)
[](./CHANGELOG.md)
Enter and exit pre mode in a Changesets repo.
## Usage
```ts
import { enterPre, exitPre } from "@changesets/pre";
await enterPre(cwd, tag);
let preState = await readPreState(cwd);
// version packages with @changesets/cli or get a release plan and apply it
await exitPre(cwd);
```
This package is used by internally by Changesets to enter and exit pre mode along with reading the pre state for the `publish` and `version` commands, you should only need it if you're using `@changesets/assemble-release-plan`, implementing Changesets or want to enter or exit pre mode programmatically.
## Types
```ts
import { PreState } from "@changesets/types";
export function enterPre(cwd: string, tag: string): Promise<void>;
export function exitPre(cwd: string): Promise<void>;
export function readPreState(cwd: string): Promise<PreState>;
```