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

# Cache Core

`@stigg/cache-core` provides the shared cache entities, entitlement mapping, and in-memory cache service used across Stigg's SDKs (`@stigg/node-server-sdk`, `@stigg/js-client-sdk`, sidecar) and `persistent-cache-service`. It has no store implementation of its own — see [Cache Redis Store](/api-and-sdks/changelog/backend-graphql/cache-redis-store) for the Redis-backed store.

<Update label="1.27.0" description="2026-07-05">
  * Added: `hasSoftLimit` is now carried through the shared entitlement cache mapping for feature and credit entitlements, so any store built on `cache-core` reflects a wallet's soft-limit configuration. Requires `@stigg/node-server-sdk` v4.45.0+ on the reader side to take effect; older readers ignore the field.
  * Versions 1.16.0 through 1.27.0 (2026-05-19 to 2026-07-05) carried no functional change to `cache-core` itself — each only bumped the package version to track releases of other packages in the monorepo.
</Update>

<Update label="1.15.0" description="2026-03-17">
  * Added: credit entitlement support to the shared `CachedEntitlement` model and cache mapper, enabling low-latency credit balance retrieval via `getCreditEntitlement()` in dependent SDKs.
</Update>

<Update label="1.0.0" description="2026-02-25">
  * Initial release. Extracted the cache entities, entitlement mapping (`CacheMapper`, `accessDeniedReasonMapper`), and in-memory cache service out of `persistent-cache-service` into a standalone, shared package consumed by `persistent-cache-service`, `@stigg/node-server-sdk`, `@stigg/js-client-sdk`, and the sidecar. No behavior change from the extraction itself.
</Update>


## Related topics

- [Persistent Cache Service](/api-and-sdks/changelog/backend-graphql/persistent-cache.md)
- [Cache Redis Store](/api-and-sdks/changelog/backend-graphql/cache-redis-store.md)
- [Core concepts](/documentation/getting-started/core-concepts.md)