MongoDB Memory Server Core

MongoDB Memory Server Core (v11.0.1) is a library designed to launch an in-memory MongoDB instance for integration and unit testing. This core package differs from the full `mongodb-memory-server` by *not* including the automatic download and management of MongoDB binaries, requiring users or other wrapper packages to provide the MongoDB executable. It enables developers to create isolated, disposable database environments programmatically, preventing test interference and ensuring a clean state for each run. The library is actively maintained with frequent updates, including version 11.0.0 and subsequent patches released in December 2025, and currently supports Node.js versions 20.19.0 and higher. Its primary use case is providing a robust, isolated MongoDB server for various ODM and client libraries within a testing suite.