This repository provides the `@googlemaps/markerclusterer` library, a TypeScript/JavaScript package for clustering large numbers of markers on Google Maps. The core `MarkerClusterer` class extends `google.maps.OverlayView` and orchestrates a pluggable pipeline: an `Algorithm` (default: SuperCluster) groups markers into `Cluster` objects, and a `Renderer` (default: SVG circles) visualizes them. It supports both legacy `google.maps.Marker` and modern `AdvancedMarkerElement`. The library is distributed as an npm package (UMD, ESM, IIFE) and includes examples with real-world coordinate data. External dependencies include the Google Maps JavaScript API runtime, the `supercluster` library for spatial indexing, and `@googlemaps/jest-mocks` for testing. The architecture emphasizes extensibility through well-defined interfaces, making it suitable for integration into larger mapping applications.