{ "packet": "fix7-p0-rollback-validator-hardening-packet-2026-06-11", "host": "T1/T2 / Claude Code / Opus 4.8", "lane": "FIX7_P0_PRE_EXECUTION_HARDENING_AND_GOVERNANCE_CONSOLIDATION_MACRO_2026_06_11", "type": "HARDENING_PATCH_PACKET", "status_marker": "REQUIRED_FOR_FUTURE_EXECUTION_MACRO", "authority_of_this_packet": "PRE_EXECUTION_HARDENING_NON_AUTHORITY; staging/paper-only; authorizes nothing; mutates no production; does NOT rewrite or supersede the original dry-run packet's verdict history", "addresses": "T2-REC-ROLLBACK-HARDENING-1 (non-blocking recommendation from the T2 independent review)", "references_original_packet": { "packet": "fix7-p0-dryrun-and-execution-readiness-packet-2026-06-11", "packet_tree_sha256": "02b200e5a3c7a21c2e620b293fbf28ccc81731a983430c3e5a202798c05e94e6", "original_validator": "dryrun_validator.py (sha256 7fb2f11e8baec9703faefbb86c23b161366b75340d98860c5c87977ee7bcb297)", "original_rollback_evidence": "rollback-recovery-proof.json (sha256 07acdf19f01769068f007c640a372f5266a88c3dab78384abe52bbc5385c37ba)", "original_evidence_status": "STILL_VALID; not modified; original PASS history preserved" }, "hardening": "When a staging mutation / rollback proof is claimed PROVEN_IN_STAGING, every rollback entry must show after_apply_hash != before_hash (a real applied mutation), with before/after_apply/after_rollback all present and after_rollback restoring before (or the pinned expected_restored_hash). New fail codes: ROLLBACK_APPLY_DID_NOT_MUTATE, ROLLBACK_NOT_RESTORED_TO_PIN. Production_rollback_status stays NOT_APPLICABLE (production mutation forbidden).", "superset_guarantee": "hardened_dryrun_validator.py adds only the rollback-mutation guard; it removes no original gate, so every original defect class remains caught. Proven by full-packet cross-check (original validator PASS, hardened validator PASS, original 20 probes 20/20 fail-closed) on the reconstructed real packet.", "production_mutation": false, "implementation_execution": false, "real_run_qt001_cutover": false, "codex_consulted": false, "owner_approval_requested": false, "files": [ "README.md", "hardened_dryrun_validator.py", "hardened_bad_input_probes.py", "valid_evidence_recheck.json", "hardening_probe_results.json", "commands.sh", "RERUN.sh", "exit_codes.json", "HASH_MANIFEST.txt", "packet_tree.sha256", "manifest.json" ], "object_ids": "TKT-OBJ-430..441 (PROPOSED, standalone governance addendum; above ceiling 429; APPLY_NOW=NO)", "governance_fold": "FOLD_READY_PACKET_ONLY (Option 2): backlog 225..429 contiguous + collision-free + readable, but canonical fold deferred (owner/GPT-only; live T1/T2 lane race) -> FIX7_P0_PRE_EXECUTION_HARDENING_READY_GOVERNANCE_FOLD_PENDING", "next_macro": "owner/operator post-dry-run decision (default HOLD). If AUTHORIZE_IMPLEMENTATION_EXECUTION_NO_PRODUCTION: a separately-authorized KB/governance execution macro that adopts hardened_dryrun_validator.py as the required gate, after OPT-4 + production-surface scoping." }