integ: land exodus-zone-gate-engine (+464L)#22
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Metadata Standards §7 defined the WNZL promotion gates as a schema with zero policy instances and no enforcement. This makes them executable, fail-closed: - scripts/exodus_gate.py: evaluate_gate() runs a policy's required fields + checks and returns a GateDecision + the CustodyEvent to write (ZonePromotion vs PolicyException; custody_status=IntegrityViolation when CHK-01 fails; auto_promote false whenever human/legal review is outstanding). - examples/gate-policies/: first concrete policies — Landing→Examination, Examination→Integration (the adversarial-evidence gate: counter-explanations CHK-04 + null hypothesis CHK-05 at E3+), Integration→Governed (CHK-06/07 + human+legal review). All validate against schemas/policy-gate.json. - scripts/test_exodus_gate.py: dependency-free CHK matrix; wired into CI. - docs/zone-gate-enforcement.md: check semantics + what remains (TriTRPC BEACON_COMMIT sealing, atom signing, ForensicBundle export command).
This was referenced Jul 5, 2026
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Phase 1 integration — clean backlog branch, no conflict. (forensic-sealing branch deferred: GitGuardian FP on a test path .../Mail/secret.eml, not a real secret.)