The article introduces a tool called the CBM Changes Explorer, designed to facilitate understanding and manipulation of the Couchbase Sync Gateway changes feed, which is integral to data synchronization in the Couchbase Mobile stack. This stack, comprising Couchbase Server, Sync Gateway, and Couchbase Lite, employs Multiversion Concurrency Control (MVCC) to ensure reliable data handling and conflict resolution without relying on constant network connectivity. The CBM Changes Explorer allows users to monitor the changes feed, manipulate data via Couchbase Lite, and observe interactions between clients and the Sync Gateway, including handling document conflicts. The tool's user interface features panes for document listing, content editing, and changes feed output, and provides functionalities for basic authentication and synchronization toggling. The article also hints at a follow-up post that will delve into the tool's code, which is available on GitHub, encouraging contributions to enhance its functionality.