Plan across a site larger than one live snapshot

Unresolved capability

Snapshot aggregation for larger sites remains an open architecture question. There is no supported multi-snapshot procedure established by this page.

Intended outcome: plan consistently across more terrain than a single live snapshot covers. For current scope decisions, consult snapshot bounds.

To complete: decide consistency and aggregation semantics, land contracts and implementation, and verify chunk boundaries and changed-baseline failures. Do not infer a workaround from staging.