Every delivery writes a receipt. This book is the company's side of that promise: one stub per wave, dated, hashed, and filed in the order the wave landed. The repository is private, so this page is the public record of what shipped, when, and with which commit.
Six pages joined the flight register: the ledger (status), the shelf (docs), the receipt book, the front desk (talk), the marginalia (FAQ), and the field notes (research), with the security page folded into the trust consolidation.