# SYNC_PERSISTENCE_PROTOCOL

```ts
const SYNC_PERSISTENCE_PROTOCOL: "@tanstack/db/sync-persistence";
```

Defined in: [packages/db/src/sync-persistence.ts:9](https://github.com/TanStack/db/blob/main/packages/db/src/sync-persistence.ts#L9)

**`Internal`**

Unstable cross-package protocol for persistence-aware collection adapters.
Application code should not construct or depend on this value directly.