What is the smallest useful starting point?

The instinct is to maximize coverage early to demonstrate value. The result is breadth without a proven pattern, and the difficult classification work still ahead.

Starting narrow and sensitive proves the mechanism where it matters: classification against the organization's dictionary, entitlement carried by records, retention treatment applied, an audit surface that answers real questions. Extending to easier corpora afterwards is straightforward in Centralpoint, because the governance is a property of records rather than of a configuration tied to the first collection.