ArAgingBucket

Object

bucket

balance

transactionCount

Open items in the bucket — every source balance its money is summed over: invoices, unapplied receipts, remaining credit memos and AR journals alike. The AP twin's documentCount counts the same way.

invoiceCount

Customer invoices in the bucket, and only those, while balance sums every open item in it — so a bucket holding a receipt or a journal reports fewer rows than it holds. Read transactionCount, which counts the population that balance describes.

Retained solely because the deployed production client still selects it: the server and the web bundle deploy separately, and an open tab holding the old bundle would take a field error here. Deleted server-side once that bundle has aged out — see the PR body's staged-deletion list.