Connectors: bring in a tool you already use — Running it again, and keeping it in sync (2)

The rules, plainly: the source wins on the columns the import fills, including clearing a cell that was cleared there, so an edit you make in one of those columns is replaced on the next run. Columns you add in RowFold are never touched, posted records are sealed against it, a record you moved to Trash stays there, and deletions never propagate: a record deleted at the source simply stops updating here. Because records are updated in place, links from your other tables, comments and history all survive. A run that finds nothing changed writes nothing, so it sets off no automation; records it adds or changes set off the table's automations and webhooks like any other edit.