D-239 three-carrier foundation merged to main. Review found a correctness bug (per-region elevation) + hollow determinism tests, both fixed before merge. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
D-239 three-carrier foundation merged to main. Review found a correctness bug (per-region elevation) + hollow determinism tests, both fixed before merge. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>