{"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-3cl4i4tz","versions":[{"created_at":"2026-06-10T22:52:29Z","element_count":62,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21040930 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"427a0b2214828371d495bd8e7a08399b7016f131d1f5d0377c5957e37913c1f7","version":20},{"created_at":"2026-06-10T13:34:20Z","element_count":62,"note":"backfill: 延床=居室床スラブ実面積93.5㎡(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":"1f125b68e9cc1a8f37b90a0ad7387365245e533839de45858e9758337b57389a","version":7},{"created_at":"2026-06-10T12:31:47Z","element_count":88,"note":"5軸GA polish 53->98 by M5 (autonomous)","saved_by":"mcp","sha256":"72c86008de073c8f5715986912966d172b71aa7f296e654d6be7ecd5b95bb02d","version":3}]}