{"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-1rvcmo6x","versions":[{"created_at":"2026-06-10T22:52:08Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote24581776 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"f38b567bde0abd147f4a9650014a96131a2ac43eefbf7e07fb4ce313fbd41a93","version":25},{"created_at":"2026-06-10T13:13:27Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積103.4㎡(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":"4114685168fb3ad8f16bb26e402357ee86e9b332be8185215f85b8efab8572bd","version":10},{"created_at":"2026-06-10T09:05:16Z","element_count":74,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"22c923384366b8c462d665307de9cd1679f4649d99fdd857a3561e30198c4c73","version":2}]}