Stored + resolved server-side; never rendered back.
The reader runs in-boundary. A source whose connection isn't provided yet is honestly gated — you'll see exactly what to supply, never a fabricated count.
Assess a source estate to beginPick a source type above, provide its connection, and select Assess. Loom enumerates the estate and produces a migration-readiness report — every object mapped to a Loom item type with a 1:1 / needs-review effort flag.