What does ~/Library/Application\ Support/Knowledge/ folder do?
Solution 1:
knowledge-agent
/usr/libexec/knowledge-agent writes its databases to~/Library/Application Support/Knowledge and /var/db/CoreDuet/Knowledge.
This is Siri's proactive knowledge functionality. Siri will read data from the services you enable in System Preferences → Siri → Siri Suggestions & Privacy, writing data it finds useful into the database.
