Every Mac comes with an (undocumented) family member classifier

The knowledge constructiond daemon in macOS 26.6.2 analyzes contact, calendar, photo, message, email, location, screen time, and other data on the device to build a knowledge graph containing 181 entity classes and 278 predicates, used to infer user and their family relationships. The graph is stored as an SQLite database in the ~/Library/IntelligencePlatform directory protected by TCC full-disk access.