{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-3xuium67","versions":[{"created_at":"2026-06-10T22:52:10Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote25095276 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7fa1cc36dd21da8a48b33e7768cdf7909b7fa34968506e6d5291a7392e3d329b","version":25},{"created_at":"2026-06-10T13:15:04Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積118.8㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"bad34ffcac244472c17fe4f1b4bff422fd36688562402db94bde8afc41b86732","version":10},{"created_at":"2026-06-10T09:21:26Z","element_count":85,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"ab3bd7b10ec51ae54147bca7306b4bafb779b7a68e734a8fa8108e95b8755936","version":2}]}