Each scenario group now runs on its own freshly-reset device: the round-trip
on a blank config page, plus a password-config device that must be sent the
password after the knock to activate, and an emergency-erase device where a
0-byte + two confirms wipes flash, EEPROM and the config page (verified by
reading all three back as 0xff). All three tiers pass every group.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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