- Error codes as public constants (E_DEVICE_NOT_FOUND etc.) — single source of truth - SCSI opcodes as named constants (SCSI_READ_10, SCSI_REPORT_KEY, etc.) - AACS key class constant, MKB format constant - No magic numbers in CDB construction - docs/disc-to-rip.md — end-to-end flow from disc insert to decrypted content - Links all module docs together as a starting point