1b86750b0d
Real-world park-buzi episode: a UEFI dbx update (delivered via fwupd/LVFS, NOT apt) revoked a stale GRUB -> panic, and moved PCR 7 -> broke TPM-sealed LUKS auto-unlock -> passphrase prompt. Recovered by re-sealing PCR 7. - appliance-provisioning.md: extend the §4 re-seal runbook to name dbx; new §4a (fwupd-not-apt, GRUB-panic ordering, PCR-7 re-seal, operator lockdown: mask fwupd + remove firmware-updater snap + BIOS-password + passphrase escrow) incl. the --test-passphrase-silently-passes-via-TPM trap (--disable-external-tokens); gotchas #12/#13. - disk-os-hardening.md: NEW — resolves a long-dangling wikilink referenced from ~18 pages. The *why* of host hardening (5 controls + firmware lockdown); commands stay in appliance-provisioning; reconciliation remains the primary anti-fraud control. - index.md: expand the disk-os-hardening catalog line. - log.md: two note entries. Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V