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- §9 rewritten: bring-up is a shared FRONT HALF only; identity-reset policy is scenario-specific (provision = fresh everything; guest-loss DR = preserve restic/tunnel/hub continuity, reset only collision-prone host-local identity). Added the slice 7/8/10 mapping table. - NEW §8a: PBS recovery-code escrow (zero-knowledge) — live key on box; agent-generated recovery code R; PBS-native passphrase-wrap of K under R escrowed to hub; consumption slice 10; irreducible-residual + rotation != key-rotation stated. - §13 updated (resolved: provision/DR slice boundary + escrow design; open: identity-reset set, hub-side escrow storage + restore-mode serving). Doc-only; no version bump. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>