{"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-8bwgqz71","versions":[{"created_at":"2026-06-10T22:52:34Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy73729440→quote22820833 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"9be8191ab83d2fc61ce51a406116b9dee2a37067d24be616d99780549093ad84","version":19},{"created_at":"2026-06-10T13:44:59Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積97.8㎡(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":"23247ee7df3269cd38fde9a922802476da9ec64f771184abecd2d5c9a93d9625","version":6},{"created_at":"2026-06-10T13:21:46Z","element_count":85,"note":"5軸GA polish 59->97 by M5 (autonomous)","saved_by":"mcp","sha256":"98b42708f641172ea6ce7654d8af125ab218d3484df346b4d2ae14a37b683b91","version":3}]}