Couchbase Mobile 2.6 introduces significant updates, including Custom Conflict Resolution in Couchbase Lite and advanced cache management in Sync Gateway, marking the first in a series of targeted releases to meet agile development needs. The update enhances Automatic Conflict Resolution by allowing developers to implement custom policies, enabling app-specific business rules to determine the resolution of conflicting document revisions. This comprehensive conflict resolution support is crucial for distributed database systems with synchronization. Additionally, Sync Gateway's cache management improvements, such as automatic eviction of old channels and configurable cache size, enhance scalability for large deployments with millions of channels, while offering users the ability to disable the revs cache to optimize memory usage in extensive deployments. These advancements, along with bug fixes and minor enhancements, are detailed in the platform-specific release notes, with the new version available for download for development purposes.