{"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-o97riyaw","versions":[{"created_at":"2026-06-10T22:01:16Z","element_count":54,"note":"revert: houki rescan NG -> restore pre-polish elements (M5 2026-06-11)","saved_by":"mcp","sha256":"e2a9b8463f0b75215947e39e21837330f5611f543f73f2e8a464f43788e3fefd","version":15},{"created_at":"2026-06-10T13:34:27Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積92.5㎡(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":"4907649b8e71ca54c88c8a0671cc1c13cf6bd00a104bc417833cccafd52187e1","version":7},{"created_at":"2026-06-10T12:48:25Z","element_count":84,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"5bd3747f7436cf613b9af104535355e85d5c149a1e4aaee2994423abc30b3627","version":4}]}